Cline

Cline is an open-source autonomous AI coding agent by the Cline team, available as a VS Code extension and CLI on macOS, Windows, and Linux. It executes end-to-end coding tasks with human-in-the-loop approval at every file write and command run.

What Cline does:

• •Full task delegation Give Cline a task like "add OAuth login" or "fix the payment bug" and it plans the steps, reads relevant files, writes code, runs tests, and reports back. You review and approve each action.
• •Human-in-the-loop approval Cline asks before writing files, running terminal commands, or opening a browser. You stay in control of every change.
• •BYOK model support Works with any API provider: Claude, GPT, Gemini, DeepSeek, local Ollama models. You pick the model and pay the provider directly -- no Cline markup.
• •MCP server integration Connects to any MCP server to access databases, APIs, and external tools during task execution. Full MCP ecosystem support.
• •Browser automation Opens a real browser to test your app, fill forms, and interact with web pages as part of multi-step tasks.
• •Context-aware editing Reads your entire codebase before writing anything. Understands existing patterns, imports, and architecture before making changes.

Cline ecosystem:

• •MCP servers 1,000+ community MCP servers for connecting to Stripe, GitHub, Supabase, databases, and web APIs during tasks.
• •VS Code extension Deep integration with VS Code: file tree access, terminal control, problem diagnostics, and diff previews before accepting.
• •JetBrains support Full JetBrains IDE integration for Teams plan users.

Limitations:

• •VS Code only — no other editors supported — Cline runs exclusively inside VS Code. If you or your contractors use JetBrains (IntelliJ, WebStorm), Vim, or any other editor, they cannot use Cline at all. There is no standalone or web version.
• •No tab-completion — it is an agent, not an autocomplete tool — Cline takes over whole tasks autonomously but does not offer the inline code suggestions (grey ghost text) that GitHub Copilot or Cursor provide. Many developers end up running a second tool alongside Cline just for autocomplete.
• •API costs can surprise you — Cline is free to install but every AI call goes through your own API key at the provider's published rate. A full day of heavy use with Claude Sonnet costs $5–15 in API fees; power users routinely spend $200–500/month. Costs are hard to predict before you start.
• •Rate-limit timeouts break long sessions — Cline calls your AI provider repeatedly during complex tasks. Hitting the provider's rate limit mid-task causes Cline to pause or fail silently, requiring a manual restart. This is especially common with Anthropic's API during peak hours.
• •Large codebases strain context windows — On projects with hundreds of files, Cline's context fills up quickly. It may lose track of earlier decisions, produce inconsistent code, or need to be re-briefed mid-task — which itself consumes more paid API tokens.

Pricing:

• •Open-source and Free for individuals, includes VS Code extension, CLI, and BYOK model support.
• •Teams Plan at $20/mo per user, offering shared settings, RBAC, and JetBrains support (first 10 seats free).
• •Enterprise Tier available with SSO and SLA.