Cline

Open-source VS Code extension that gives Claude, GPT-4 and other models agentic access to your files, terminal and browser.

Open sourceIDE

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What it does

Cline is an AI tool for reviewing pull requests and writing code with AI. It is open source and free to use.

Cline is an open-source VS Code extension that turns a language model of your choice into an autonomous coding agent. It can read and write files, run terminal commands, search the web and control a browser using the Model Context Protocol. You bring your own API key for whichever provider you prefer, so there is no per-seat subscription to Cline itself. The extension supports custom tool definitions that let you extend what the agent can do.

  • Agentic file reading, writing and creation
  • Terminal command execution
  • Browser control via computer use
  • Bring-your-own model via API keys
  • Model Context Protocol (MCP) tool support

Key facts

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PricingOpen source
Free planYes
PlatformsIDE
APINo

What you can do with it

Reviewing pull requests#5 of 12Writing code with AI#12 of 21

Good at

  • Free to use; costs are only what you pay your model provider
  • Works with any API-compatible model
  • Extensible with custom MCP tools

Watch out for

  • Requires managing API keys and understanding token costs
  • Only works inside VS Code

Common questions

What is Cline used for?
Cline is used for reviewing pull requests and writing code with AI. On AIToolMaps it ranks #5 of 12 for reviewing pull requests.
Is Cline free?
Yes. Cline is open source and free to use.
What platforms does Cline run on?
Cline runs on IDE.
What are the best alternatives to Cline?
The closest alternatives are Claude Code, Cursor and GitHub Copilot, which do most of the same jobs. Cursor is the closest one with a free plan.

Reviews

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Listing history

  1. Oct 4, 2026Listed