Pick any LLM. Bring your own keys. Build agents once, share them as markdown files, run everything on your machine. No cloud, no lock-in, no surprises on your bill.
ChatGPT is powerful but locked to one model and one vendor. Local tools are private but primitive. Try Sidekit is the third option — real agents, your models, your machine.
ChatGPT Plus, Claude Pro, and a dozen "AI-powered" apps. You already pay for the APIs through your other tools. Try Sidekit lets you use them directly — one interface, one tab of credentials.
Every AI sidebar ships your browsing to someone's server. Try Sidekit runs a sandboxed companion on 127.0.0.1. The only outbound request is the one you explicitly chose.
Custom GPTs die when OpenAI deprecates them. Claude Projects don't port. Try Sidekit's Skills are markdown files — version them, share them on GitHub, compose them. Portable by design.
Try Sidekit lives in your browser's side panel, reads your tabs on permission, remembers per-agent context, and switches models on demand.
Research agent on Claude. Quick tasks on GPT-4o-mini. Private work on Ollama. Bring your own keys — they live in your OS keychain, not ours.
Each agent is a folder with a SKILL.md that defines its role, tools, and permissions. Drop in, share via GitHub, remix. Try Sidekit can also generate them from descriptions.
Per-agent directory. Per-agent permissions. Per-agent network allowlist. Agent A can't read agent B's files, and neither can touch anything outside their sandbox.
When an agent hits a wall, it says so. No hallucinated search results, no fake citations. It can also ask to load a skill mid-conversation to unlock new capabilities.
Token counts and dollar cost per turn, per agent. You see what you're spending as you go. Set Ollama as the default and the number stays at $0.
Research notebook agent — one thread per project. Summarize agent — one thread per article. Switch, archive, delete. Each conversation is its own context window.
Two pieces, one workflow. Install the companion, install the extension, you're chatting.
npm install -g @try-sidekit/companion — one command, all platforms.
Chrome extension launching soon. Join the waitlist to be notified the moment it's live.
Or skip and use Ollama locally. Stored in your OS keychain.
Built-in skills cover summarizing, research, and search. Or write your own.
We'll save you the privacy-policy bureaucracy: we don't have servers. We couldn't collect your data if we wanted to.
127.0.0.1.The companion binds exclusively to localhost. No external access possible. CORS locks to Chrome extension origins only.
The only outbound requests are the LLM API calls you configured — OpenAI, Anthropic, Google, or nothing (Ollama stays offline).
No proxy. No logging. No servers. We don't operate infrastructure.
Read full privacy policy →Chrome extension is in review. Drop your email and we'll ping you the moment it's live on the Web Store.
No spam. One email when the extension launches.