Cline
Open-source autonomous coding agent for VS Code that runs on your own API key with no subscription
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About Cline
Cline is an open-source autonomous coding agent that runs inside VS Code, with CLI and embeddable SDK options too. It edits across multiple files, runs terminal commands and reacts to their output, and works through whole tasks rather than single completions. You bring your own API key, so there's no subscription, and it's aimed at developers and engineering teams who want a capable agent they fully control.
Two things stand out. First, control: Cline has a plan-and-act mode that lets you align on a strategy before any code changes, plus per-step approval and an optional auto-approve mode for when you trust it to run. Edits arrive as diffs you can review and undo, with checkpoint recovery if something goes sideways. Second, openness: under Apache 2.0 you pick the model and provider, from Claude or GPT to a local Ollama setup, which avoids lock-in and lets you keep sensitive code on a private model. It's also extensible through MCP servers and plugins, so you can wire in custom tools and integrations.
For multi-file refactors, terminal-driven automation, or running an agent against a self-hosted model for data control, Cline gives you a transparent, no-subscription option with serious flexibility.
Key Features
- Plan and Act modes for separating strategy from execution
- Bring-your-own-key support across 30+ providers including Anthropic, OpenAI, Google, and OpenRouter
- Model Context Protocol (MCP) servers for custom tools and integrations
- Human-in-the-loop approval on every file edit and terminal command
- Browser automation via Puppeteer for testing and debugging
- Local model support through Ollama and LM Studio
Pros & Cons
What we like
- Fully open source under Apache 2.0 with no subscription required
- No vendor lock-in since you choose the model and provider
- Strong control with per-step approval and an optional auto-approve mode
- Extensible through MCP servers and a growing plugin ecosystem
Room for improvement
- BYO-key costs can spike on large tasks since you pay per token
- Quality depends heavily on pairing it with a capable model
- Less polished out-of-box than fully managed paid agents
- API setup and provider config add friction for non-technical users
Frequently Asked Questions
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Reviews (16)
Three months in, mixed but positive
Started using Cline casually, now it is pinned in my dock. What stands out is how it handles strong control with per-step approval and an optional auto-approve mode. It has been a fit for running an agent on a private or self-hosted model for data control. My only gripe is byo-key costs can spike on large tasks since you pay per token. Easy yes for anyone weighing the same trade offs.
The kind of tool you forget you are paying for
Three months of Cline later, here is what holds up. Their take on fully open source under apache 2.0 with no subscription required is genuinely good. Genuine strength is that it gets out of the way and lets me work. It has been a fit for multi-file refactors and feature work inside vs code. Easy yes for anyone weighing the same trade offs.
Quietly excellent
Almost a year on Cline now, no plans to leave. The browser automation via puppeteer for testing and debugging is more useful than I expected. It slotted into my routine without much fuss. It has been a fit for running an agent on a private or self-hosted model for data control. Easy yes for anyone weighing the same trade offs.
Bought it for one feature, stayed for ten
Tried Cline on a side project first, then rolled it out everywhere. It does what it says, which is rarer than it should be. Mostly using it for running an agent on a private or self-hosted model for data control. Hard to imagine going back to my old setup.
Worth the price of admission
Found Cline on a Reddit thread and I am glad I clicked. Got real value out of no vendor lock-in since you choose the model and provider. What stands out is how little babysitting it needs. Would sign up again without thinking twice.
It just works
Almost a year on Cline now, no plans to leave. Got real value out of human-in-the-loop approval on every file edit and terminal command. Glad I made the switch.
Quietly excellent
Found Cline on a Reddit thread and I am glad I clicked. The no vendor lock-in since you choose the model and provider is more useful than I expected. Worth the price for what I get out of it.
Bought it for one feature, stayed for ten
Came to Cline after getting frustrated with what I had before. Got real value out of local model support through ollama and lm studio. Worth the price for what I get out of it.
Recommended without reservation
Cline solves a real problem for me without making a fuss about it. Real selling point for me was local model support through ollama and lm studio. Found it works best for extending a coding agent with custom mcp tools and integrations.
Recommended without reservation
Found Cline on a Reddit thread and I am glad I clicked. It is the rare tool that got better the more I used it. The interface stays out of my way, which I appreciate. It has been a fit for automating terminal-driven tasks like builds, tests, and migrations.
Three months in, mixed but positive
Hadn't planned on switching, but Cline was hard to ignore. Their take on extensible through mcp servers and a growing plugin ecosystem is genuinely good. Genuine strength is that it gets out of the way and lets me work. It fits well for automating terminal-driven tasks like builds, tests, and migrations. It would be a five if not for less polished out-of-box than fully managed paid agents. It earns its place in my stack.
The kind of tool you forget you are paying for
Started using Cline casually, now it is pinned in my dock. The fully open source under apache 2.0 with no subscription required is more useful than I expected. It has been a fit for running an agent on a private or self-hosted model for data control. Glad I made the switch.
Decent with some rough edges
Started using Cline casually, now it is pinned in my dock. Real selling point for me was no vendor lock-in since you choose the model and provider. Mostly using it for automating terminal-driven tasks like builds, tests, and migrations. It would be a five if not for quality depends heavily on pairing it with a capable model. Worth the price for what I get out of it.
Bought it for one feature, stayed for ten
Tried Cline on a side project first, then rolled it out everywhere. The core workflow is smooth once you are set up. It handles the boring parts so I can focus on the work that matters. Glad I made the switch.
Two months in, no regrets
Almost a year on Cline now, no plans to leave. Got real value out of browser automation via puppeteer for testing and debugging. It earns its place in my stack.
Worth the price of admission
Came to Cline after getting frustrated with what I had before. It does what it says, which is rarer than it should be. Recommending it to people in a similar spot.
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