Cline

Open-source VS Code AI agent — Plan/Act mode, MCP Marketplace, BYO key, and 1.5M+ installs by April 2026.

AI Code Tools
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Features

Feature 1

Open source under MIT license

Feature 2

VS Code extension with 1.5M+ installs

Feature 3

Plan/Act mode for separate planning + execution

Feature 4

MCP Marketplace for extensible AI tooling

Feature 5

BYO key: Anthropic, OpenAI, OpenRouter, Bedrock, Vertex, Azure

Feature 6

Automatic model routing (v3.2) cuts API costs

Feature 7

Open Source Teams free through Q1 2026 then $20/mo (10 free seats)

Feature 8

Web browsing and terminal command execution