Cline vs Roo Code vs Continue 2026: Open-Source AI Coding Agents Compared
Detailed head-to-head of three main open-source AI coding plugins: Cline (formerly Claude Dev, most popular open-source agent), Roo Code (Cline fork, more flexible), Continue (most mature open-source plugin). VS Code/JetBrains compatibility, BYO API key (Claude/GPT/Gemini/local Ollama), MCP integration, pricing (FREE plugin + API cost), practical use for Turkish developers, KVKK + self-host advantages, 10-scenario decision guide.
One-line answer: Cline is the most popular OSS agent, Roo Code is the flexible fork, Continue is the mature JetBrains-compatible plugin — free plugin + BYO API key + local Ollama supports give full cost and KVKK control.
- 2024-2026 saw open-source AI coding plugins rise — user supplies API key (Anthropic, OpenAI, Gemini, Together AI, Ollama local), plugin is free. Three leaders: Cline, Roo Code, Continue.
- Cline (formerly Claude Dev): 30K+ GitHub stars, most popular OSS coding agent. VS Code extension. Plan/Act mode, MCP-native, terminal integration, file edit, browser use. BYO API key.
- Roo Code: fork of Cline, more flexible with Custom Modes (Architect, Code, Debug, Ask). 12K+ stars, faster community PRs.
- Continue: most mature OSS plugin (since 2023). Full VS Code + JetBrains support. Multi-model, custom slash commands, codebase indexing. 22K+ stars.
- Shared advantage: FREE plugin + BYO API key = full cost control. Heavy Anthropic Sonnet 4.6 use ~$50-150/mo (can exceed Cursor Pro $20 subscription).
- KVKK critical: Cline + Ollama local model = FULLY LOCAL AI coding. Data never leaves the company. 100% KVKK compliant. DeepSeek V3 local + Cline = leader.
- Recommendation: solo wanting to avoid Cursor/Copilot — Cline or Roo Code; JetBrains user — Continue; KVKK-critical + local model — Cline + Ollama.
1. Introduction
2024-2026 saw open-source AI coding plugins rise alongside premium tools (Cursor, GitHub Copilot, Windsurf). Three advantages: free plugin, transparency, local model support.
2. Overview
| Dimension | Cline | Roo Code | Continue |
|---|---|---|---|
| GitHub stars | 30K+ | 12K+ | 22K+ |
| License | Apache 2.0 | Apache 2.0 | Apache 2.0 |
| IDE | VS Code | VS Code | VS Code + JetBrains |
| Plan/Act mode | Yes | Custom Modes | Limited |
| MCP | Native/leader | Native | Yes |
| Browser use | Yes | Yes | No |
| Inline tab | No | No | Yes |
| Best for | Multi-step agentic | Custom roles | Daily IDE assistant |
3. Strengths
- Cline: most popular OSS agent, widest MCP ecosystem (OSS), Plan/Act mode, rich tool set
- Roo Code: Cline fork with Custom Modes (Architect/Code/Debug/Ask), faster community iteration
- Continue: JetBrains support (only OSS option), inline completion + chat, custom slash commands
4. Cost vs Subscription
Heavy Anthropic Sonnet usage may exceed Cursor's $20/mo. Light usage with DeepSeek V3 (~$0.27/$1.10 per 1M token) or local Ollama ($0) is cheaper.
5. Local Ollama + Cline = 100% KVKK Compliance
For Turkish banks, defense, healthcare: Cline + Ollama + DeepSeek V3 / Qwen local. Data never leaves the company. Hardware investment amortized in 6 months.
6. Scenarios
- Solo light: Cline + Claude Sonnet ($40/mo)
- Solo heavy: Cursor Pro ($20)
- KVKK-critical: Cline + Ollama local
- JetBrains: Continue (only option)
- Budget student: Continue + Gemini Flash or Cline + Ollama
7. Conclusion
Open-source plugins are mature in 2026. BYO API key + local Ollama give full cost and KVKK control. Hybrid is strongest: Continue (JetBrains inline) + Cline (VS Code agentic) + local Ollama for sensitive work.
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