ThinkRail

Open-source (Apache-2.0) agentic IDE from JetBrains InnovationHub, built around the pi coding agent. Each task gets its own git-worktree workspace so several agents can work in parallel without touching your checkout, and a graph of SPEC.md files keeps project intent between sessions. It has Monaco editor tabs, terminals, live diffs, MCP servers, Agent Skills and a one-click GitHub PR flow. Desktop app or CLI that opens in the browser; bring your own model via JetBrains AI or any pi provider.

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Pricing

Model
free (open source)
Starting price
Not listed — check the vendor site
Source
Pricing page ↗

Best for

Code faster with an AI-powered editor

▸ An IDE designed around the agent rather than bolted on: parallel worktree workspaces, live diffs, and specs the agent actually maintains.

Use a coding agent from the terminal

▸ Like the pi terminal agent but with a real workbench around it: several sessions per workspace, live cost, and a PR button.

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