What Bridge is

Bridge is a mobile-first notes-and-thinking workspace that turns the raw ideas you capture into a connected, searchable graph — and eventually into shippable plans. Three things make Bridge different from a notes app or a chat-with-LLM tool.

The graph forms itself

As notes accumulate, Bridge automatically groups semantically-related ones into constellations — themed clusters with AI-generated names. You don't fold, tag, or organize manually. The connections surface on their own, driven by a semantic pass that runs over every note you capture. Two notes about the same API problem written a week apart will appear connected in the graph before you consciously notice the link.

Each constellation gets a generated name that reflects the theme of the notes inside it. When the cluster is dense enough, Bridge surfaces it as a candidate project in the Inbox.

Notes can become plans

When a constellation crosses a critical mass of relevance, you can tap Start a venture. Bridge generates a full plan package — plan, spec, and AGENTS.md overlay — from the notes inside that constellation. The plan is markdown you can read, share, edit, and download. The generated files include a database schema, an API contract, a component tree, a data-flow diagram, constraints and acceptance criteria, a step-by-step implementation plan, and an AGENTS.md overlay that gives any coding agent instant project context.

Chat works against your structured workspace, not raw history

Conversations can be scoped to specific notes, a whole constellation, or a generated plan. The AI answers using only the references you pick, so you stay in control of context. This is different from a general-purpose chat tool, where the AI can only work from what you paste into the current message. In Bridge, the notes and plans you've already built up are always available to bring into scope.

Bring your own AI

Bridge is BYOAPI — you provide your own Anthropic, Gemini, or OpenAI API key. Your subscription is an access fee for the workspace, not an AI markup. You pay your AI provider directly for inference, with no middleman markup baked into Bridge's price. The Free tier is genuinely free: no AI runs on it by default (no expansion, no clustering), so your only cost is your time.

Where to go next

• New to Bridge? Read Quick start for a step-by-step setup walkthrough.
• Want to see a complete idea-to-plan flow? Walk through Your first venture.
• Want to understand the building blocks? Start with Notes & classification.
• Comparing tiers? See the full Tier comparison.