Free
Cline
Cline is an open-source autonomous coding agent for VS Code and CLI that uses a Plan-and-Act loop to read, edit, execute terminal commands, and build software with your own API keys.
Evaluation
What to know
Best for
- Developers wanting an open-source VS Code agent
- Teams using custom model endpoints or BYOK
- End-to-end task automation inside editors
Not ideal for
- Users looking for a completely managed hosted subscription
- Developers who only want lightweight inline completion
Key features
- Plan-and-Act agentic loop
- Direct terminal execution and file editing
- Support for Anthropic, OpenAI, OpenRouter, and local models
- MCP tool integrations and human-in-the-loop approvals
Pros
- Fully open-source with no vendor lock-in
- Transparent cost control with pay-per-token models
- Deep integration with VS Code
Cons
- Requires managing your own API keys
- Token costs can accumulate on complex agent loops
ToolifyNav verdict
Cline provides an open-source, non-locked alternative to dedicated AI editors like Cursor and Windsurf. Alongside terminal tools like Claude Code and Aider, Cline is the premier in-editor agent for developers who want complete control over model choice and cost.
About
About Cline
Cline brings full agentic coding into standard VS Code and command-line workflows under an Apache 2.0 license. It plans architecture, edits files across repositories, runs tests, and fixes errors while letting developers bring their own model providers.
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