Cline
https://cline.bot/Open-source AI coding agent that runs as a VS Code extension (not a fork). Bring-your-own-API-key — pay only LLM costs, no Cline subscription.
TL;DR of This AI Tool
- VS Code users who want a capable coding agent without migrating to a forked IDE like Cursor or Windsurf.
- Developers already paying for LLM API access who don't want a second subscription layered on top.
- Engineers who need to audit or self-host their tooling and want Apache 2.0 source they can inspect.
- Teams evaluating AI coding agents who want to run local models and keep code off third-party servers.
- Solo developers and hobbyists for whom Cursor's subscription cost isn't justified by their usage volume.
- No subscription cost — you pay only LLM API rates, which is often cheaper than flat-rate competitors.
- Stays inside VS Code proper, so there's zero IDE migration friction.
- Diff-before-apply workflow gives you meaningful control without constant interruption.
- Open source with a permissive license — no vendor lock-in, auditable behavior.
- Model-agnostic: switch LLMs without switching tools.
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