Gemini vs Grammarly (AI): Which AI Tool Should You Choose?

QA v1.0 — 2026-05-25 KST. content_status = qa_passed. Generated from templates/comparison-page-template.md and promoted after an independent Section B walk-through of qa/adsense-seo-quality-gate.md. Meta description (≤ 155 chars): Gemini is Google's multimodal ecosystem AI assistant; Grammarly (AI) is an in-place writing layer across everyday apps — cross-suite, not head-to-head.

Quick recommendation

• Choose Gemini if: your daily work already lives inside Google's products (Gmail, Google Docs, Drive, Calendar, Search, Android), you want a multimodal general-purpose AI assistant that appears next to those documents and inboxes, you value NotebookLM/Canvas/Gems on the Free tier, and you want access to Google's most capable model variants (Gemini 3 Pro, Deep Think) reachable from one ascending consumer subscription rather than a per-keystroke writing/clarity layer that follows you across every app you type into.
• Choose Grammarly (AI) if: your team's writing happens across many surfaces every day — Gmail, Outlook, Google Docs, Word, Slack, browser form fields, LinkedIn, the mobile keyboard — and you want grammar, clarity, tone adjustment, and light generative drafting to ride along inline wherever you already type, with explicit per-tier generative-AI prompt quotas and a freemium price point sized to writing/knowledge-worker seats rather than a separate multimodal chat tab tied to a single vendor's ecosystem.
• Consider another option if: your top need is a careful, instructable general-purpose chat assistant for long-context reasoning, structured drafting, and a separately metered developer API (look at Claude), an AI surface inside Microsoft 365 apps rather than Google's (look at Microsoft Copilot), an in-Notion workspace AI for documents and project notes (look at Notion AI), templated brand-voice marketing-content production at volume (look at Jasper), or in-IDE coding assistance (look at GitHub Copilot or Cursor).
• Last verified: 2026-05-25 KST. Underlying source reads: gemini.google/subscriptions/ on 2026-05-23 KST (plan amounts rendered in KRW on that fetch, so USD figures are routed to "verify on official site" rather than asserted); gemini.google.com/ homepage on 2026-05-22 KST; grammarly.com/plans on 2026-05-22 KST; grammarly.com/ai on 2026-05-21 KST.

Short answer

Gemini and Grammarly (AI) both get described as "AI for writing," and they sometimes appear next to one another on broad "best AI tools" lists. The real procurement question they answer is not the same question, and treating them as direct head-to-head substitutes will steer a buyer to the wrong product. This page is intentionally written as a cross-suite / partial-overlap comparison.

Gemini is Google's family of multimodal AI products and the consumer-facing chat assistant from Google. As a product, the same "Gemini" brand spans three connected surfaces: a standalone chat app at gemini.google.com (web and mobile); AI features inside Google Workspace and other Google apps (Gmail, Docs, Slides, Drive, Search, Android); and a developer-facing API through Google AI Studio / Vertex AI. The same brand also refers to the underlying model family — several versions of which are exposed through the consumer subscriptions. Google positions Gemini around two distinctive ideas: multimodal input (text, images, files, and other media handled in the same conversation) as a first-class capability, and deep integration with the Google product ecosystem. The buyer Gemini is sized for is "people whose canonical documents and inbox already live in Google's products, plus people who want a multimodal Google-connected chat surface."

Grammarly (AI) is Grammarly Inc.'s writing assistant — originally a grammar and clarity layer, now extended with generative drafting and rewriting — that lives as a browser extension, in-app integrations (Gmail, Outlook, Google Docs, Word, Slack), native Windows and macOS desktop apps, and mobile keyboards. The product's distinctive idea is that it appears in-place wherever a knowledge worker already types instead of pulling them into a separate chat window, and it ships with explicit per-tier generative-AI prompt quotas (100/month Free, 2,000/member/month Pro, unlimited Enterprise) plus the older clarity/tone layer that gave the brand its category fluency. The buyer Grammarly (AI) is sized for is "writing and knowledge-worker seats who do high-volume writing across many apps every day and want clarity, tone, and light generative drafting to follow them across those apps."

That difference is most of the decision. For a buyer who already lives inside Google Workspace and wants AI to appear next to Gmail, Docs, and Drive — plus a multimodal chat surface tied to Google's most capable models — Gemini is the right shape of product and Grammarly is not really competing for that job; Grammarly does not run inside Google's chat surface, does not give you Deep Search or Deep Think modes, and does not bundle storage with the subscription. For a writer or team whose canonical job is "produce a steady stream of cleaner, more on-brand prose across Gmail, Outlook, Docs, Word, Slack, LinkedIn, browser forms, and mobile typing every day," Grammarly (AI) is the right shape of product and Gemini is not really competing for that job; Gemini lives inside its own chat surface and Google's apps, not inline in non-Google apps where a lot of the writing already happens. Many organizations end up paying for both, sized to independent populations — Gemini sized to the Google-ecosystem / Workspace user population, Grammarly sized to writing/knowledge-worker seat headcount — because the failure modes are independent and one product does not cover the other product's job.

A pricing caveat applies on both sides. Gemini's plan structure was read from gemini.google/subscriptions/ on 2026-05-23 KST: a Free tier, then three paid subscriptions (Google AI Plus, Google AI Pro, Google AI Ultra) with rising usage limits, storage, Google Flow credits, and model access — but the USD plan amounts were not visible during this fetch because the page rendered in KRW. This page intentionally does not quote USD figures for Gemini's paid tiers; verify them directly on the official site for your region. Grammarly's plan structure was read from grammarly.com/plans on 2026-05-22 KST: Free at $0/month with 100 generative-AI prompts per month and core grammar and tone features, Pro at $12/month with 2,000 generative-AI prompts per member per month plus tone and rewrite suggestions, and Enterprise on Contact Sales pricing with unlimited generative-AI prompts and admin and security controls. Workspace-bundled Gemini entitlements (for Google Workspace business and enterprise plans) are sold and entitled separately from the consumer subscription page and are not represented above; verify those through Google Workspace's own documentation. Grammarly Enterprise exact USD figures are not on the public plans page (Contact Sales only) and student/education/regional pricing variants were not in scope of the 2026-05-22 fetch and should be verified directly with Grammarly. Both vendors have moved features, quotas, and tiers between releases; reconfirm before any pricing-sensitive decision.

Comparison table

Use-case based choice

For writing and editing

This is the headline comparison and the answer depends almost entirely on what "writing" means in your day.

**Gemini is built around writing that happens inside the document you are already in if that document lives in Google's apps.** For users whose canonical documents live in Google Docs, whose long email threads live in Gmail, and whose files live in Drive, Gemini's value proposition is that the AI does not require leaving those surfaces. You can ask Gemini to draft an outline, expand a section, rewrite a paragraph in a different tone, summarize a long Gmail thread, or generate slide bullets — and the result appears next to the content it is being applied to. The Free tier bundles NotebookLM, Canvas, and Gems, which give a real on-ramp to writing-style surfaces inside Google's ecosystem without paying anything; the paid tiers add usage multipliers, storage, Google Flow credits, and progressively more capable model variants. The trade-off is that the experience is shaped by the surrounding Google product. If you write your canonical documents somewhere else — in Outlook, Word, Slack, LinkedIn, Salesforce, or a browser form — Gemini does not appear inline there, and the in-Workspace advantage shrinks to "another chat tab you can paste content into."

Grammarly (AI) is built around writing assistance that follows the writer across every app they type in. The product is positioned around real-time grammar, clarity, and conciseness suggestions in Gmail, Outlook, Google Docs, Word, Slack, browser form fields, LinkedIn, and the mobile keyboard, plus tone adjustment and rewrite suggestions on the Pro tier and in-place generative drafting from a short instruction. That shape removes the copy-paste loop that a writer would otherwise own each time the assistant they want to consult lives in a separate chat tab — and the per-seat price ($12/month on Pro as of the 2026-05-22 read of grammarly.com/plans) is sized to writing/knowledge-worker seat procurement rather than to multimodal chat. The trade-off is that Grammarly is not where deep, structured drafting (a long memo, a research synthesis, a 30-page contract review) most naturally happens; its generative surface is tuned for short-to-medium chunks in place — an email, a Slack message, a paragraph in a doc — and Gemini's chat surface (or another general-purpose assistant like Claude) is the more direct fit for sustained multi-page reasoning.

The practical takeaway: pick Gemini if the writing job is general-purpose drafting next to Gmail/Docs/Drive and the buyer is "users in the Google ecosystem." Pick Grammarly (AI) if the writing job is high-volume everyday writing across many apps and the buyer is "writing/knowledge-work seats who want a per-keystroke layer that follows them across surfaces." If both are true — there is a Google-ecosystem user base and a writing-heavy team whose work spreads across many non-Google surfaces too — many organizations buy both, sized independently. The two surfaces overlap on the easy case (drafting a single email inside Gmail) and diverge everywhere else.

For coding and technical work

Neither product is the most directly marketed answer for coding, but they do not fail equally.

Gemini is a competent code-conversation surface inside a general-purpose chat shape. You can paste source into the Gemini app and have the same kind of "explain this code / refactor it / generate tests / walk through this bug" conversation a knowledge worker would have with any modern general-purpose assistant. Gemini's paid tiers list expanded model access — Gemini 3 Pro on Google AI Pro and Deep Think on Ultra — which Google positions as more capable model variants. Google also has a separate developer surface (Google AI Studio / Vertex AI) for product integrations. Gemini's distinctive coding advantage is the same ecosystem story as the rest of the product: if your code reviews and technical documentation already live in Google Docs, Gemini can appear next to those artifacts; if you do not work that way, the coding chat surface is comparable in shape to other general-purpose assistants. Multi-file in-IDE editing, codebase indexing, and agent-style file edits are not where Gemini concentrates as a product — for those workflows, a dedicated AI coding tool (Cursor, GitHub Copilot, Replit AI) is the more direct match.

Grammarly (AI) does not target coding. Its strength is in-place writing assistance across general communication, not code completion, code chat, in-IDE multi-file refactors, or pull-request review. A developer evaluating Grammarly as a coding assistant is the wrong shopper for the product — it can still help with the writing around code work (commit messages, PR descriptions written outside the IDE, design-doc drafting in Google Docs or Word, customer-facing release notes, internal updates) but it is not the tool that sits in the editor.

This is not a benchmark claim about either product. Coding quality varies across tasks, languages, models, and prompt shapes, and treating any "X is better at code than Y" headline as durable would be wrong even when both products were in scope; here, only one is, and even Gemini's coding strength is conversational rather than in-IDE. For an engineering team doing both code work and high-volume writing — which is common — pair a dedicated coding assistant with Grammarly (or with Gemini, or with both for different jobs) rather than asking either of these two products to cover the coding job alone.

For research and fact-checking

Both products generate text, and neither is a citation-first answer engine. The shapes still differ.

Gemini's research-style strength is connection to Google Search and the deeper research modes inside the paid tiers. The 2026-05-23 read of gemini.google/subscriptions/ listed Deep Search as a Google AI Pro feature and expanded Nano Banana access in Search on Google AI Plus. NotebookLM, included free, is itself a research-style surface for working across a corpus of uploaded sources. For the everyday "look something up and get a starting answer" job, Gemini's tie to Search gives it a different starting position from a pure chat assistant. The same hallucination caveat applies — Gemini can still produce confident text that is not what its sources say — and Google's published documentation on Gemini, Search Generative Experience, and Workspace AI data-handling should be treated as the only authoritative source on what is or is not used for model training.

Grammarly (AI) is not pitched as a research engine. Its generative features are drafting and rewriting against an existing piece of writing; the product does not present inline citations from primary sources and does not market itself as the tool you reach for when the bottleneck is verifiable real-time research. A team using Grammarly still needs a separate research stack — primary sources, an analyst, a fact-checker, or a dedicated AI answer engine — to verify factual claims before publishing.

If the bottleneck is research where inline citations from many sources are the deliverable, a dedicated AI answer engine like Perplexity is closer to the right shape of product than either Gemini or Grammarly (AI). If the bottleneck is "I already have a document and I want a careful conversational partner to reason across it," Claude's long-context positioning is the more directly marketed answer. Treat Gemini and Grammarly as starting points for writing about research, not as the primary fact-finder.

For teams or businesses

The team buying decision tracks the product shape, the surrounding ecosystem, and the data-handling policy per SKU.

Gemini for teams is structurally more complicated because Google sells Gemini through two different motions. Consumer Gemini subscriptions (Free, Google AI Plus, Google AI Pro, Google AI Ultra) on gemini.google/subscriptions/ are aimed primarily at individual users; the 2026-05-23 fetch showed the plan structure (Free with Gemini app/Gemini 3.5 Flash/15GB/NotebookLM/Canvas/Gems; AI Plus with 2× usage/200GB/200 Flow credits/expanded Nano Banana in Search; AI Pro with 4× usage/5TB/1,000 Flow credits/Gemini 3 Pro/Deep Search/Google Antigravity; AI Ultra with up to 20× usage/20TB+/10,000–25,000 Flow credits/Deep Think/Gemini Spark) but not USD plan amounts (the page rendered in KRW for that access). Workspace-bundled Gemini entitlements are sold and entitled separately as part of Google Workspace business and enterprise SKUs; the consumer subscription page is not the right place to look for those team-procurement details. Workspace data-handling rules also differ from consumer Gemini data-handling rules — Google publishes separate documentation for each, and a team buying Gemini for business use should be reading the Workspace AI documentation specifically, not the consumer subscription page.

Grammarly (AI) for teams is the product's natural buying surface. Pro at $12/seat/month is the public per-seat price as of the 2026-05-22 read of grammarly.com/plans, lifting the per-member generative-AI quota to 2,000 prompts/month and adding tone and rewrite suggestions on top of the Free-tier grammar and clarity layer. Enterprise is Contact Sales pricing with unlimited generative-AI prompts per member per month plus admin and security controls; Grammarly Enterprise exact USD figures are not on the public plans page and should be verified directly with Grammarly before quoting. Grammarly is sized to writing/knowledge-worker seat headcount — anyone whose job involves a steady stream of email, document, message, and form writing across many apps — and the workflow value (an inline grammar/clarity/tone/rewrite layer plus capped generative drafting) is the reason a team picks Grammarly at a per-seat price meaningfully below a typical multimodal general-assistant Pro subscription.

For a buyer with both populations — a Google-ecosystem user base (executives, ops, sales, support, finance, anyone who lives in Gmail/Docs/Drive) and a writing-heavy team whose work also spreads across non-Google surfaces (Outlook, Word, Slack, LinkedIn, browser forms, mobile keyboards) — these are two separate procurement decisions. The Google-ecosystem-user-population yes/no for Gemini does not answer the writing-seat-across-many-apps yes/no for Grammarly, and vice versa. Many organizations buy both, sized independently. Admin/SSO availability, data-handling for AI inputs and outputs per tier, model-training opt-outs, and the list of available models per plan tier should all be confirmed on each vendor's official documentation before procurement; treat each vendor's published policy as the only authoritative source on what is and is not used for model training or improvement.

For multimodal input

This is largely a Gemini-only use case in any meaningful sense.

Gemini's public positioning makes multimodal a first-class capability. It is one of the two ideas Google leads with for the product (the other being Google ecosystem integration). The Gemini app accepts text, images, screenshots, and uploaded files in the same conversation, and the paid tiers list features such as expanded image generation and (on AI Pro/Ultra) more capable model variants for cross-modal reasoning. If your daily workflow routinely combines screenshots, uploaded photos, scanned PDFs, slides, or other non-text inputs with text prompts, Gemini's shape leans into that job. Verify per-tier multimodal feature differences directly on gemini.google/subscriptions/ — the per-tier feature list changes between releases.

Grammarly (AI) does not lead with multimodal as a first-class capability. Grammarly's positioning is writing assistance — grammar, clarity, tone, rewrites, and in-place generative drafting against text input — across the apps a knowledge worker already types in. Image-input, file-input, and screenshot reasoning are not the product's pitch. A buyer whose top need is "text + images + files in one conversation across general work" is not a Grammarly buyer in the way they would be a Gemini buyer.

Pricing and plan caveats

• Gemini: the page-body read of gemini.google/subscriptions/ on 2026-05-23 KST showed a Free tier (Gemini app, Gemini 3.5 Flash, basic image generation, 15GB storage, NotebookLM, Canvas, Gems) and three paid subscriptions (Google AI Plus: 2× usage, 200GB storage, 200 Flow credits, expanded Nano Banana in Search; Google AI Pro: 4× usage, 5TB storage, 1,000 Flow credits, Gemini 3 Pro, Deep Search, Google Antigravity; Google AI Ultra: up to 20× usage, 20TB+ storage, 10,000–25,000 Flow credits, Deep Think, Gemini Spark). USD plan amounts were not visible during this fetch because the page rendered in KRW. Pricing for Gemini's paid tiers should be verified on the official website at https://gemini.google/subscriptions/ for your region. Workspace-bundled Gemini entitlements are sold and entitled separately and are not represented on the consumer subscription page; verify Workspace pricing and entitlements through Google Workspace's own documentation.
• Grammarly (AI): the page-body read of grammarly.com/plans on 2026-05-22 KST showed Free at $0/month with 100 generative-AI prompts per month plus core grammar and tone features (tone adjustment, sentence rewrites, and English fluency features listed as not included in Free), Pro at $12/month with 2,000 generative-AI prompts per member per month plus tone and rewrite suggestions, and Enterprise on Contact Sales pricing with unlimited generative-AI prompts per member per month plus admin and security controls. Student/education discounts, region-specific pricing variants, and Enterprise exact USD figures were not in scope of that fetch (Enterprise is Contact Sales by design) and should be verified directly with Grammarly.

Both vendors have moved features and quotas between releases. Treat the structural facts above as recent (May 2026) reference points, not as long-term guarantees. Re-verify before quoting either page in a high-stakes decision.

Who should choose Gemini

• Your canonical documents and inbox already live in Google's products (Gmail, Docs, Drive, Calendar) and you want the AI to appear next to them rather than in a separate chat tab.
• You routinely ask multimodal questions that combine text with screenshots, uploaded images, PDFs, or other media, and you want that to be a first-class capability.
• You already pay for Google One cloud storage and would prefer a single subscription that bundles storage (200GB / 5TB / 20TB+) with AI features rather than paying twice.
• You value NotebookLM (included in the Free tier) as a research-across-a-corpus surface and want it as part of the same product family.
• You want a general-purpose chat assistant tied closely to Google Search and to deeper research modes (Deep Search, Deep Think) inside the paid tiers, and you are sizing the buy against the Google-ecosystem user population (executives, ops, sales, support, finance, anyone who lives in Gmail/Docs/Drive/Search/Android).
• A multimodal chat tab tied to one vendor's ecosystem is more useful to your team than a per-keystroke writing/clarity layer that follows writers across every app they type in.

Who should choose Grammarly (AI)

• Your team's daily writing is spread across many apps — Gmail, Outlook, Google Docs, Word, Slack, browser form fields, LinkedIn, mobile keyboards — and you want grammar, clarity, tone, and light generative drafting to ride along inline wherever the writing actually happens.
• You want explicit per-tier generative-AI prompt caps (100/month Free, 2,000/member/month Pro, unlimited Enterprise) rather than implicit per-tier usage multipliers, so seat-level budgeting and quota planning are predictable.
• You are sizing the buy against writing/knowledge-worker seat headcount — anyone whose job involves a steady stream of email, document, message, and form writing — at a per-seat price meaningfully below a multimodal general-assistant Pro tier.
• You are comfortable that the canonical job-to-be-done is "cleaner, on-brand prose across the apps writers already use," not "long, structured drafting in a separate chat surface" or "multimodal text + image + file reasoning."
• Your team's data-handling policy is compatible with Grammarly processing the text typed into the integrated surfaces, per Grammarly's published AI data policy per tier.

Alternatives to consider

• Claude — fits when your top need is a careful, instructable general-purpose chat assistant for long-context reasoning, structured drafting, and coding/research dialogue across web, mobile, desktop, and a separately metered developer API, ecosystem-agnostic rather than tied to Google Workspace or to an in-place writing layer.
• Microsoft Copilot — fits when your organization is standardized on Microsoft 365 and Windows and you want the AI to appear inside Word, Excel, Outlook, PowerPoint, and Teams as a native surface — the Microsoft-side analogue of the Gemini-inside-Workspace story. Microsoft 365 Copilot Business USD pricing was directly visible on the 2026-05-23 read of microsoft.com/en-us/microsoft-365/copilot/business.
• Notion AI — fits when your team's canonical documents live in a Notion workspace and you want AI drafting/summarization/Q&A inside that workspace rather than inside Google's apps or as an in-place writing layer across many apps.
• Jasper — fits when the job is templated, brand-voiced marketing content production at volume across more than one channel, with team review structure — a different shape of product from either a multimodal general assistant or an in-place writing layer.
• GitHub Copilot — fits when the bottleneck is in-IDE coding assistance — autocomplete, chat, agent-mode features, PR assistance — rather than general-purpose chat or everyday writing.
• Cursor — fits when the bottleneck is an AI-first dedicated code editor for engineering seats working on a local project, not a multimodal chat surface or an in-place writing layer.

Decision rules

• Pick by which population you are sizing for. Gemini is sized to the Google-ecosystem user population (anyone who lives in Gmail, Docs, Drive, Calendar, Search, or on Android). Grammarly (AI) is sized to writing/knowledge-worker seat headcount (the people who produce a steady stream of writing across many apps every day). One subscription does not answer the other population's job.
• Pick by where the writing actually happens. If the canonical place a piece of writing lives is a Google Doc, a Gmail thread, or a Drive file, Gemini's in-Workspace surface is a direct advantage. If the canonical writing surfaces are spread across Outlook, Word, Slack, LinkedIn, browser forms, and the mobile keyboard, Grammarly's in-place layer is a direct advantage. Gemini does not run inline in non-Google apps and Grammarly does not run inside Gemini's chat surface or Deep Search/Deep Think modes.
• Pick by whether multimodal input is a primary capability you need. If text + images + files + screenshots in one conversation is part of the daily workflow, Gemini's positioning leans into that job; Grammarly (AI) does not.
• Pick by whether you need explicit per-tier generative-AI quota predictability. If seat-level budgeting depends on a published per-member monthly prompt cap (100 / 2,000 / unlimited), Grammarly's per-tier quota structure is a direct fit; Gemini publishes per-tier usage multipliers and Flow credit pools rather than a per-tier prompt cap.
• Re-verify both vendors' pricing pages directly before any team-level commitment. Gemini USD plan amounts were not visible during the 2026-05-23 fetch (rendered in KRW for that access), so confirm regional pricing on the official site before quoting; Grammarly Enterprise is Contact Sales pricing and student/education/regional pricing variants were not in scope of the 2026-05-22 fetch and should be confirmed directly with the vendor before quoting.

FAQ

Are Gemini and Grammarly (AI) direct competitors? Not really, even though they sometimes appear next to one another on broad "best AI tools" lists. Gemini is a general-purpose multimodal AI assistant tied to the Google ecosystem (Gmail, Docs, Drive, Search, Android) with a chat-tab plus in-Workspace product shape; Grammarly (AI) is an in-place writing layer (grammar, clarity, tone, rewrites, in-place generative drafting) that follows the writer across many apps. The buyer population, the canonical writing surface, and the deeper job-to-be-done are all different. A writing-heavy team is unlikely to replace Grammarly with Gemini, and a Google-ecosystem user base is unlikely to replace Gemini with Grammarly. Most organizations that need both jobs end up paying for both as separate procurement lines.

Which one has the better free tier? This is not a like-for-like comparison. Gemini's Free tier (per the 2026-05-23 read of gemini.google/subscriptions/) includes Gemini app access, the Gemini 3.5 Flash model, basic image generation, 15GB cloud storage, NotebookLM, Canvas, and Gems — a meaningful surface of free multimodal capability for an individual user. Grammarly's Free tier (per the 2026-05-22 read of grammarly.com/plans) includes $0/month with 100 generative-AI prompts per month plus core grammar and writing tone signal across the integrated surfaces — a meaningful inline writing-assistance surface for a writer who works across many apps. Asking "which free tier is better" is the wrong question if the job-to-be-done is different on each side; both Free tiers are useful for their own job.

Which one is better for long documents? Neither is the most directly marketed answer for long-document careful reasoning — that positioning belongs to Claude. Gemini can read and summarize long documents inside the chat app, and Gemini Pro/Ultra push their long-context handling and add Deep Search/Deep Think modes; Grammarly's generative surface is tuned for short-to-medium chunks in place — emails, Slack messages, paragraphs in a doc — not for sustained multi-page reasoning. Verify per-model context-window limits on Google's documentation before relying on a number you read from an older third-party comparison.

Why doesn't this page quote USD prices for Gemini's paid tiers? Because they were not visible during the 2026-05-23 fetch of gemini.google/subscriptions/. The page rendered in KRW for the access we made. Rather than convert KRW to USD or quote a stale third-party number as fact, this page asserts only the structural plan facts (Free, Google AI Plus, Google AI Pro, Google AI Ultra; per-tier feature deltas like storage size, Google Flow credits, and model access) and routes the reader to verify USD amounts directly on the official site. This follows the rule in qa/adsense-seo-quality-gate.md §A1/A2: pricing should be from the official pricing page or marked "verify on official website" — never inferred.

Why doesn't this page quote a USD figure for Grammarly Enterprise? Because the public Grammarly plans page lists Enterprise as Contact Sales pricing rather than a published USD amount. An Enterprise buyer should contact Grammarly directly to get a current quote for their seat count, admin/SSO requirements, data-handling needs, and contract length.

Are the prices on this page going to stay accurate? Treat them as recent (May 2026) reference points, not as long-term guarantees. Both vendors have changed plans, quotas, and feature lineups multiple times. Re-verify on gemini.google/subscriptions/ and grammarly.com/plans before any pricing-sensitive commitment.

Bottom line

• Decide by which job you are hiring the tool for, not by which product sounds more capable in marketing copy. Gemini and Grammarly (AI) are not really competing for the same job. Gemini is sized to the Google-ecosystem user population; Grammarly is sized to writing/knowledge-worker seat headcount that produces writing across many apps.
• If your canonical documents and inbox live in Google's products, and you want a multimodal general-purpose AI assistant tied to that ecosystem plus access to Google's most capable models through a paid subscription, default to Gemini. Free is enough to evaluate the Workspace and NotebookLM surfaces; the paid Google AI Plus/Pro/Ultra tiers add usage limits, storage, Flow credits, and progressively more capable models — with USD amounts to verify on the official site for your region.
• If your team's job is high-volume everyday writing spread across many apps and you want grammar, clarity, tone, and light generative drafting inline wherever your writers already type, default to Grammarly (AI). Free is enough to evaluate the experience and the explicit 100-prompt-per-month generative quota; Pro at $12/seat/month lifts the quota to 2,000 prompts per member per month and adds tone and rewrite suggestions; Enterprise is Contact Sales for unlimited prompts plus admin and security controls.
• Treat the two products as complements rather than substitutes for many organizations. Gemini covers the in-Google-ecosystem multimodal AI surface for the broader knowledge-work population that lives on Google's products; Grammarly covers the in-place writing layer for the writing/knowledge-worker seats whose work spreads across many non-Google apps too. The combined per-seat bill is real; decide whether the second tool earns its line item based on whether the writing surface it covers is one your team actually uses.
• Re-verify both vendors' pricing pages directly before any team-level commitment. Gemini USD amounts were not visible during the 2026-05-23 fetch (rendered in KRW), so confirm regional pricing on the official site before quoting; Grammarly Enterprise is Contact Sales pricing and student/education/regional pricing variants should be confirmed directly with the vendor before quoting.

Sources

• Gemini official homepage: https://gemini.google.com/ — recorded as src-google-gemini-needs-verify in data/sources.json with access_status = ok. The id carries a legacy needs-verify semantic from the seed scan, but the current access status is ok. Cited here only as the official product URL; no plan-structure or feature claim is drawn from this homepage source.
• Gemini subscriptions page: https://gemini.google/subscriptions/ — recorded as src-gemini-subscriptions-2026-05-23 in data/sources.json with access_status = ok after a 2026-05-23 page-body read; this is the source of every Gemini plan-structure and per-tier feature claim quoted on this page. USD plan amounts were rendered in KRW during this fetch and are intentionally not quoted on this page.
• Grammarly AI feature page: https://www.grammarly.com/ai — recorded as src-grammarly-ai-2026-05-21 in data/sources.json with access_status = ok; cited here only as the official AI feature URL (no pricing or quota claim drawn from this source).
• Grammarly plans page: https://www.grammarly.com/plans — recorded as src-grammarly-plans-2026-05-22 in data/sources.json with access_status = ok after a 2026-05-22 page-body read; this is the source of every Grammarly plan, price, and per-tier generative-AI prompt quota quoted on this page (Free $0/month with 100 prompts/month, Pro $12/month with 2,000 prompts/member/month, Enterprise Contact Sales with unlimited prompts).

All four entries above resolve to official first-party URLs. Re-verify the Gemini subscriptions page and the Grammarly plans page before any new pricing-sensitive quote. If a later refresh changes the access status of src-google-gemini-needs-verify or src-grammarly-ai-2026-05-21, this page does not need to be rewritten — it never asserts a fact from either homepage/feature source beyond what is visible on it today.

Internal links

• /tools/gemini/
• /tools/grammarly-ai/
• /tools/claude/
• /tools/microsoft-copilot/
• /tools/notion-ai/
• /tools/jasper/
• /tools/github-copilot/
• /tools/cursor/
• /ai-assistant/
• /ai-writing/
• /compare/claude-vs-gemini/
• /compare/gemini-vs-microsoft-copilot/
• /compare/gemini-vs-notion-ai/
• /compare/gemini-vs-jasper/
• /compare/github-copilot-vs-gemini/
• /compare/claude-vs-grammarly-ai/
• /compare/notion-ai-vs-grammarly-ai/
• /compare/github-copilot-vs-grammarly-ai/
• /compare/grammarly-ai-vs-jasper/
• /compare/grammarly-ai-vs-microsoft-copilot/
• /compare/grammarly-ai-vs-replit-ai/
• /compare/grammarly-ai-vs-cursor/

Disclosure

• Affiliate links: none.
• Sponsored content: none. Neither Google nor Grammarly Inc. has any relationship to this page.
• Generative AI assistance: this draft was assembled with the help of an AI assistant working from the HMP source records and the two qa_passed tool pages (tools/gemini.md, tools/grammarly-ai.md). All AI-generated text on this page is a proposal that requires human review before publication, not a finished factual claim.

Trademark notice

Gemini, Google, Google Workspace, Gmail, Google Docs, Google Slides, Google Drive, Google Calendar, Google Search, Google One, NotebookLM, Canvas, Gems, Google AI Studio, Vertex AI, Google AI Plus, Google AI Pro, Google AI Ultra, Google Flow, Nano Banana, Deep Search, Deep Think, Gemini Spark, Google Antigravity, and Android are trademarks of Google. Grammarly is a trademark of Grammarly Inc. Other vendor and product names mentioned on this page — Anthropic/Claude, Microsoft/Microsoft 365/Copilot/Word/Excel/Outlook/PowerPoint/Teams/Windows, GitHub/GitHub Copilot, Notion/Notion AI, Jasper, Cursor/Anysphere, Replit, OpenAI/ChatGPT, Perplexity, Salesforce, LinkedIn, Slack — are the trademarks of their respective owners. Use here is referential only and does not imply endorsement, partnership, or affiliation with any vendor.

Update log

• 2026-05-25 (draft): first local draft created from templates/comparison-page-template.md. Both source tool pages (gemini, grammarly-ai) are qa_passed per content/content-status.json.
• 2026-05-25 (QA): independent Section B walk-through completed. B1–B5 passed; content_status = qa_passed. Re-verify both vendors' pricing pages by 2026-08-20 (90 days from the older of the two source-read dates, 2026-05-22 for Grammarly). Gemini USD amounts and Grammarly Enterprise USD figures remain routed to "verify on official site" until a future fetch yields directly visible figures.