What is Cline?
Cline is a free, open-source AI coding agent licensed under Apache 2.0 that runs as a Visual Studio Code extension, a command-line tool, and an embeddable SDK. With over 8 million installs across macOS, Windows, and Linux, Cline is designed to handle complete development tasks autonomously — from planning and editing files to running terminal commands and managing long-running processes — rather than offering line-by-line code suggestions.
Unlike subscription-based AI coding tools, Cline operates on a bring-your-own-key model where the extension itself costs nothing and developers pay only for the AI inference they consume directly through their chosen provider. It supports a wide range of models including Claude, GPT-4, Gemini, DeepSeek, and local models through Ollama or any OpenAI-compatible endpoint, with no vendor lock-in at any level. Typical API costs for active use range from $20 to $50 per month depending on the model and session volume.
Cline's architecture centers on a Plan and Act mode system where developers first review and align on a proposed strategy before execution begins. This gives teams visibility and control over what the agent does at every step, with optional auto-approve for trusted workflows. The platform extends further through MCP server integration and a plugin SDK that allows custom tools for databases, APIs, and infrastructure to be registered and used by the agent directly.
⚡ Key Features
- Plan and Act Modes: Proposes a strategy for review before executing, with optional auto-approve for trusted workflows.
- Bring Your Own Key: Works with Claude, GPT-4, Gemini, DeepSeek, Ollama, AWS Bedrock, GCP Vertex, and any OpenAI-compatible endpoint with no vendor lock-in.
- Terminal Integration: Executes bash commands, monitors live output, and manages long-running servers, tests, and deployments directly from within the agent workflow.
- Multi-File Coordinated Edits: Makes linter-aware edits across multiple files simultaneously with diff previews, checkpoints, and one-click undo.
- MCP Integration: Connects to MCP servers and a plugin SDK for registering custom tools covering databases, APIs, and infrastructure.
- Multi-Agent Coordination: Delegates tasks to specialist sub-agents for parallel execution across complex workflows.
- VS Code and JetBrains Support: Available as a VS Code extension for all users and as a JetBrains extension on Enterprise plans.
- Embeddable SDK: Integrates Cline's agent capabilities directly into custom developer tooling and internal platforms.
🎯 Who is it for?
- Individual developers who want a fully capable AI coding agent without a monthly subscription fee
- Teams that need model flexibility and want to avoid vendor lock-in across their AI tooling stack
- Privacy-conscious developers and enterprises that require client-side code processing with no data sent to third-party intermediaries
- Engineering teams on AWS Bedrock, GCP Vertex, or Azure OpenAI who want agent capabilities on their existing model infrastructure
- Developers building custom internal tools who need an embeddable AI agent SDK
💰 Pricing
| Plan | Price | What's Included |
|---|---|---|
| Individual | $0 | Full open-source access, BYOK, all core features |
| Hosted Credits | Pay-as-you-go | AI inference billed through Cline, no provider key needed |
| Teams | $20/user/month | Centralized billing, role-based access, priority support — first 10 seats free |
| Enterprise | Custom | SSO, SLA, dedicated support, JetBrains extension, enhanced security |
Cline's Individual plan is free with no feature restrictions. The only cost is AI inference billed directly by your chosen model provider. Heavy agent sessions on premium models like Claude can accumulate $20–$50/month or more in API costs depending on usage.
