The arena · AI coding assistant review
Cline
by Cline Bot Inc. (open source)
The most-adopted open-source coding agent: 58K+ GitHub stars, 5M+ installs, $0 software with at-cost BYOK inference
Free
The extension, CLI and SDK are free and open source (Apache 2.0); you pay only AI inference, either via your own API keys or Cline credits sold at provider cost, with an Enterprise plan (custom pricing) adding SSO, JetBrains and admin controls. Verified against cline.bot/pricing 2026-07.
BYOK: Anthropic, OpenAI, Google, Bedrock, Vertex, Groq, DeepSeek, Ollama and more
Entire product is free (Apache 2.0); you pay only model inference
Extension
Yes
Yes
Yes
What is Cline?
Open-source autonomous coding agent that lives in your VS Code sidebar (plus a CLI and SDK), released mid-2024 as Claude Dev and renamed Cline in October 2024 with an Apache 2.0 license. The software is 100% free: you plug in your own API keys (Anthropic, OpenAI, Google, Bedrock, Vertex, DeepSeek, local Ollama and more) or buy inference at cost through Cline credits. By February 2026 it counts 58.2K GitHub stars, 297 contributors and 5M+ installs, the most-adopted open-source coding agent.
Cline pros & cons
Pros
- Genuinely free and Apache 2.0 licensed: 58.2K GitHub stars, 5.8K forks, 297 contributors as of Feb 2026, forkable if the company ever disappears
- Total model freedom (BYOK): Anthropic, OpenAI, Google, AWS Bedrock, GCP Vertex, Groq, DeepSeek, or free local models via Ollama, with inference sold at cost when you use Cline credits
- Near-zero switching cost: uninstall the extension and VS Code is untouched, .clinerules are plain text files in your repo
- Full agentic loop with approval gates: multi-step execution, terminal automation, headless browser testing of UI changes, and MCP marketplace for external tools
- Real-time cost transparency with per-operation token counts, unlike opaque credit systems of hosted builders
- Power-user favorite combo: runs as an extension inside Cursor, adding model freedom and MCP on top of Cursor's completions
Cons
- No inline tab autocomplete: it is a task-based agent, not a line-completion tool, so most users pair it with Copilot or Cursor
- BYOK costs are on you and can run away: heavy users report $10-20/day on Opus-tier models, roughly $30-80/month for typical professional use
- Slower than integrated rivals on comparable tasks (one 2026 benchmark measured 90s vs 45s for Cursor) and no background agents or codebase-wide predictive indexing
- Setup requires developer literacy: API keys, model selection and cost monitoring are your job, nothing is one-click
- JetBrains support and fine-grained permissioning are gated behind the Enterprise plan (custom pricing)
The arena’s verdict
Cline is the default recommendation for developers who want a serious agentic coder without vendor lock-in: the software costs nothing, every token is billed at provider cost, and you can swap models per task, down to free local Ollama for grunt work. Expect to pay $30-80/month in inference for typical professional use with frontier models, which often beats a $200 IDE subscription while staying fully under your control. Skip it if you want tab autocomplete, background agents or a zero-setup experience: Cursor is faster and more polished for that, and many power users simply run Cline inside Cursor to get both. Non-developers should start with Bolt.new or v0 instead, as Cline assumes you can read the code it writes.
Thumbs up or thumbs down
Cast your verdict
Would you recommend Cline, or warn the crowd away?
Top Cline alternatives
All alternativesThe Swedish vibe-coding leader: prompt to full-stack web app, roughly $500M ARR less than two years after launch
The agent-first AI IDE past $2B ARR: Composer 2.5 ties Claude Opus 4.7 on SWE-Bench at roughly 1/10th the cost
The market's biggest AI pair programmer: 20M+ users, 4.7M paid subscribers, from $10/month
Compare Cline head-to-head
What the crowd says
“No tab autocomplete hurts at first, but for multi-file refactors it's the most trustworthy agent I've used. Apache 2.0 means no rug pull.”
“The MCP marketplace plus Plan/Act gates is the right model for agentic coding. I run it inside Cursor and get the best of both.”
“Switched from a $200/mo IDE plan to Cline with my own Anthropic key. Spending about $50/mo in tokens and I can see exactly where every cent goes.”
Cline: frequently asked questions
Is Cline free?
Yes, Cline is free to use.
How much does Cline cost?
Cline is free. The extension, CLI and SDK are free and open source (Apache 2.0); you pay only AI inference, either via your own API keys or Cline credits sold at provider cost, with an Enterprise plan (custom pricing) adding SSO, JetBrains and admin controls. Verified against cline.bot/pricing 2026-07.