C
Cline
Best Open Source AgentThe open-source coding agent for VS Code
4.7(18,000 reviews)
500K+ users
FreeAgentsAgentOpen SourceVS Code
Cline is a free, open-source coding agent extension for VS Code. Plan-execute-test loop with full transparency, bring-your-own-API-key, and a vibrant community of contributors.
Key Features
Open source — auditable agent loop
Bring your own API key (Claude, GPT, local)
Plan and Act modes
Browser tool for web testing
MCP server support
Who Uses It?
👤
OSS Devs
Free agentic coding without lock-in
👤
Privacy-conscious
Use with local Llama / DeepSeek
🔬
Researchers
Studying agentic loops
Pros & Cons
Pros
Completely free (BYOK)
Fully transparent — audit every step
Active GitHub community
Cons
Less polished than Cursor / Claude Code
Requires technical setup
Ready to get started?
Try Cline Today
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Pricing
🆓
free
Free open source. Pay only for your LLM API usage.
Tags
AgentOpen SourceVS CodeBYOK
Best For Industries
TechnologyEngineering