UltraContext

About UltraContext

UltraContext is open-source context infrastructure for people running several coding agents at once. A background daemon captures sessions from whichever agents you use — Codex, OpenClaw, Antigravity, opencode, Cursor — and syncs them in real time into a unified store, so every agent can query what the others already learned instead of rediscovering your codebase and your decisions from scratch in each new session. It installs as a global npm package and the whole thing is open source, which matters for a tool whose entire value proposition is holding the accumulated working state of your engineering work. The hosted service adds the parts that are annoying to run yourself: managed infrastructure, analytics over what context is actually being queried, and backups with log retention on the paid tier. Pricing is shaped around queries rather than storage, which is the right axis for this product — the free tier gives unlimited storage, unlimited contexts and 1,000 queries a month at no cost forever, and Pro at $100/month raises that to 50,000 queries with higher rate limits, backups and priority support. That is a big gap, and the $100 price point is aimed squarely at people running agents heavily enough to notice; a developer using one agent occasionally will sit on the free tier indefinitely, which appears to be the intent.

Key Features

UltraContext Pros & Cons

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