AI on every page.
Nobody in the middle.
Context Copilot brings your own Anthropic or OpenAI key, stored locally in your browser, and lets you summarise, rewrite, translate or chat with any page as context. Your key calls the provider direct. No Context Copilot server, no account, no subscription required. The core is free, forever.
Every page you summarise is a page you hand over.
The client doc. The private thread. The half-written contract. Run it through a cloud AI assistant and the page content goes up to their backend, wrapped in an account, before it ever reaches the model. Context Copilot cuts the middleman out: your key, your browser, straight to the provider.
Your key, stored locally
The key lives in your browser's local storage, on your machine. There is no Context Copilot backend and no proxy to hold it.
Straight to the source
Your prompts and page content go from your browser directly to Anthropic or OpenAI. No third party sits in the path reading them.
No account, no login wall
Install it, paste your key, go. There is no sign-up, no workspace on someone's server, nothing between you and the page you are on.
Zero telemetry
No analytics, no tracking, no phone-home. Your chat history stays in your browser and one button wipes it.
Ten skills, plus the ones you build.
Run a skill on the whole page or on a selection you right-click. Then build your own: your prompts, your defaults, saved as chips you reuse everywhere.
Not just private. A better copilot.
Privacy is the foundation. The reason you keep it pinned is that it is quick, it remembers, and it bends to how you work.
Right-click to run
Select text on any page, right-click, pick a skill. No copy-paste into another tab, no losing your place.
Voice in, chat that sticks
Talk to it with built-in voice input, and your chat history persists in the side panel until you clear it.
Pro-Prompt on tap
Toggle Pro-Prompt to have your ask rewritten into a sharper prompt before it runs, with a before-and-after so you see the lift.
You can see the cost
A session usage view shows tokens and spend as you go. Because it is your key, the number is the truth, not a credit bundle.
Privacy is not the trade-off. It is the unlock.
Because there is no server in the middle, Context Copilot does things the cloud assistants structurally cannot. Their business needs the backend, the account and the credit meter. Ours needs none of it, so you get more, not less.
No credit meter
You use your own key at the provider's real cost. No monthly credit bundle, no "you're out of messages" wall, no markup on top of the model.
Pick your model
Your key, your choice of provider and model. Point it at the newest model the day it ships, instead of waiting for a middleman to support it.
Read sensitive pages
Contracts, client data, internal tools. The page goes straight to the model you chose, with no assistant vendor logging it in between.
Your skills are yours
Custom skills are saved in your browser. No account to lock them to, nothing that disappears when a plan lapses.
The AI browser assistants all work the same way.
Sider, Merlin, Monica, HARPA, the whole category: your page content flows through their backend, behind an account, and the useful limits sit behind a subscription and a credit meter. It is a good business for them. It puts every page you touch through a party you did not choose.
Your pages, through their servers
Even where you can add your own key, the request often still routes via their backend. That is one more party that can log what you read and ask.
Metered and paywalled
Free tiers ration messages, and the good models and higher limits sit behind a monthly plan plus a credit bundle you top up.
Context Copilot breaks the pattern
No backend, so nothing to route through and nothing to meter. Your key, direct to the provider, free.
Context Copilot vs the assistants, on the facts
The cloud assistants are capable. The difference is who sits between you and the model, and how you pay.
| Context Copilot (Local Gorilla) | Sider | Merlin | |
|---|---|---|---|
| Server in the middle | None, key calls provider direct | Routes via their backend | Routes via their backend |
| Account required | No | Yes | Yes |
| Pricing | Free core, BYO key (Pro optional) | Free tier + subscription | Free tier + subscription |
| Credit meter | None, you pay the provider | Credits / message limits | Credits / message limits |
| Telemetry | Zero | Analytics by default | Analytics by default |
| Custom skills you own | Yes, saved in your browser | Tied to account | Tied to account |
| Platforms | Chrome / Chromium | Chrome / Chromium | Chrome / Chromium |
Sider (sider.ai) and Merlin (getmerlin.in) are cloud AI browser assistants by category: they run an account, a free tier plus paid subscriptions with credit or message limits, and route requests through their own backend. Monica and HARPA sit in the same category. Facts stated at category level; corrections welcome: admin@lionsedge.tech
Free forever. Pro when you want more.
The core is free and stays fully functional: your key, all ten skills, custom skills, voice and history. No subscription is required to use the whole tool. An optional Pro tier is on the way for the people who live in it, and it is still bring-your-own-key with no middleman.
- All ten built-in skills plus the custom-skill builder
- Chat with any page, right-click to run a skill
- Voice input, persisted history, themes
- Zero telemetry, no account
- Curated Skill Packs: Research, Copy, Dev, Founder, Legal
- Cross-device sync, no backend
- Per-skill model preferences
Questions
Is there a free, private alternative to Sider or Merlin?
Yes. Context Copilot is a free Chrome extension where you bring your own Anthropic or OpenAI key, stored locally in your browser. It summarises, rewrites, translates and chats with any page as context. Your key calls the provider direct, with no Context Copilot server in the middle, no account and no subscription. The cloud AI assistants route your page content through their own backend behind a login and a paid plan.
Where is my API key stored?
In your browser's local storage, on your own machine. Context Copilot has no backend and no proxy, so the key and your page content go straight from your browser to Anthropic or OpenAI. Local Gorilla never sees your key, your prompts or your pages.
How much does Context Copilot cost?
The core extension is free, forever: bring your own key and pay your AI provider directly for what you use, at their cost, usually cents. No subscription is required and there is no markup. An optional Pro tier is coming at US$8.08/mo (or US$80.80/yr) that adds curated Skill Packs, cross-device sync and per-skill model preferences, still with your own key and no middleman.
Does Context Copilot track me or send analytics?
No. Zero analytics, zero telemetry, no account. Your chat history is persisted only in your browser's local storage and a single button wipes it. Nothing is reported back to Local Gorilla.
What can it do on a page?
Ten built-in skills (summarise, rewrite, explain, translate, extract actions, spreadsheet, ideation, debug, pro-prompt and free chat), plus a custom-skill builder so you can add your own. Chat with the page as context, run a skill by right-clicking a selection, use voice input, and switch dark, light or system themes.
Does it work in browsers other than Chrome?
Context Copilot runs on Chrome and Chromium browsers. Because it is a browser extension, it already works across macOS, Windows and Linux wherever Chromium runs.
Put the model on your side of the glass.
Free on the Chrome Web Store. Bring your own key and keep every page to yourself.
Get the extension