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GemType
Free, open-source Grammarly alternative powered by Gemini
GemType checks your grammar and rewrites text on any website — Gmail, LinkedIn, X, Reddit, anywhere. Like Grammarly, but free and open source: you plug in your own free Google Gemini API key. No account, no subscription, no tracking.
Hi Product Hunt — I'm Ripon, a solo founder at Matily, an open-source studio.
I wanted Grammarly's "fix my writing everywhere" experience without the subscription, the account, or my text going to a company's servers. So I built GemType.
GemType underlines grammar and spelling mistakes in any text field — Gmail, LinkedIn, X, Reddit, docs, forms — and fixes them in one click. Select any text and you can rewrite it too: Improve, Shorten, Formal, or Casual. And it works in any language, automatically.
It's live today on Chrome, Edge, and Firefox.
The twist: it runs on YOUR own free Google Gemini API key. That means:
- It's genuinely free (Gemini's free tier is plenty for daily writing)
- Your text goes straight from your browser to Google's API — no GemType server in the middle, no account, no tracking
- It's fully open source (Apache 2.0), so you can read and audit exactly what it does
Where it's going: GemType isn't just a browser extension — I'm building it to follow you everywhere you write. iOS and Android keyboards and a Microsoft Office add-in are next, all sharing the same private, bring-your-own-key core.
A few honest notes:
- You need a free Gemini key from Google AI Studio (2 clicks, no credit card). It's one extra step vs. Grammarly — the price of "no middleman server."
- Google Docs isn't supported yet (it renders to a canvas and locks its API to whitelisted vendors).
- It's an indie/solo project. A Safari build is ready too — I just need to cover Apple's $99/yr developer fee, so I set up GitHub Sponsors.
I'd genuinely love your feedback — which platform should I ship next, and what would make you switch from Grammarly? I'll be here all day.
— Ripon, founder of Matily
P.S. GemType isn't affiliated with or endorsed by Grammarly — I just wanted an open, private take on the idea. "Grammarly" is a trademark of Grammarly, Inc.
How do I install it or configure my own Google API key to use it without paying?
Thanks for shipping this, Ripon. The bring-your-own-key model is a smart way to sidestep both the subscription and the trust problem, since the text goes straight to Gemini instead of sitting on a GemType server in between.
One place I can see this helping a lot: someone drafting external support replies across Gmail and a helpdesk widget who can't justify Grammarly Business but still wants clean grammar without a vendor logging every outgoing message.
I'm curious how the shadow-root overlay holds up against editors that aggressively manage their own undo history, like ProseMirror-based apps. Does a correction ever get treated as an external edit and get flagged or reverted?
The rewrite modes, Improve, Shorten, Formal, Casual, applied per selection rather than as a blanket setting feels like the right call, since it keeps the tool from silently changing someone's voice across an entire doc.
Does Gemtype support team collaboration in real time,how does it handle conflicting changes?
"Great launch, Ripon! The privacy aspect of sending text straight from the browser to the Google API is a huge selling point. Have you thought about adding a 'Team/Workspace' feature down the line where a small company could plug in a single shared paid Gemini API key for all their employees, or is GemType strictly staying focused on individual solo users?"
"Can Gemtype be used for commercial projects, and are there any licensing limitations?"
How does GemType handle websites with complex editors like Notion, Google Docs, or Figma? Have you run into any compatibility challenges?
curious, can it learn my writing style over time or does it just use generic prompts?
Can Gemtype be used completely offline, or does it require an internet connection because it uses Gemini?
honestly love that it runs without an account or tracking, just plug in your key and go. the no-frills approach feels really considered, like you guys actually thought about what people want instead of stuff another dashboard.
This looks interesting! Since GemType uses my own Gemini API key instead of a subscription, how does the free Gemini API tier hold up in day-to-day use? Have any users run into rate limits when using it for emails, documents, or social media writing throughout the day?
Awesome tool! I've been looking for something like this that doesn't require a subscription. Have you tested this with complex web apps like Notion or Google Docs? Curious if it conflicts with their native formatting.
How do you handle context when rewriting text on different websites? For example, does GemType adapt its suggestions differently for professional emails versus casual social media posts?
How well does GemType work on sites with rich text editors like Notion or Google Docs?
This looks incredibly clean! The automatic sentence re-check feature is brilliant because word-level fixes so often break the overall flow. Since the extension checks our writing every time we pause, have you run into any issues with Gemini's free-tier rate limits during heavy, fast-paced writing sessions?
About GemType on Product Hunt
“Free, open-source Grammarly alternative powered by Gemini”
GemType was submitted on Product Hunt and earned 16 upvotes and 33 comments, placing #52 on the daily leaderboard. GemType checks your grammar and rewrites text on any website — Gmail, LinkedIn, X, Reddit, anywhere. Like Grammarly, but free and open source: you plug in your own free Google Gemini API key. No account, no subscription, no tracking.
GemType was featured in Chrome Extensions (52.7k followers), Writing (59.3k followers), Artificial Intelligence (473.7k followers) and GitHub (41.3k followers) on Product Hunt. Together, these topics include over 157.4k products, making this a competitive space to launch in.
Who hunted GemType?
GemType was hunted by Ripon Chandra Malo. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
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Ripon Chandra Malo