Cline vs Roo Code 2026: Which VS Code AI Agent Wins?

TL;DR Verdict

Both Cline and Roo Code are free, open-source AI coding extensions for VS Code that let you bring your own API key. Cline (64,273 GitHub stars) is the original, with a massive community and a simple, no-markup agent. Roo Code (24,304 stars) is a feature-packed fork that adds custom agent modes, deeper workflow control, and enhanced safety. Choose Cline if you want a proven, community-driven tool with minimal configuration. Choose Roo Code if you need flexible agent roles, multi-step workflows, and checkpoint rollback. Neither has a paid tier — both are $0/mo with your own model key.

Origins: Roo Code as a Cline Fork

Roo Code started as a fork of Cline, but the projects have diverged significantly. Cline focuses on being the most-adopted open-source agent, with 5M+ installs and a philosophy of simplicity — no extra modes, no markup language. Roo Code took the core and built an entire team-of-agents concept, introducing custom modes, memory, and task queues. While both share the same DNA, Roo Code now adds features that Cline deliberately omits.

Agent Modes, Custom Modes, and Workflow Control

Cline has a single unified agent mode. You give it a task, it analyzes, edits, runs terminal commands, and provides results. No mode switching — just one AI that tries to do everything.

Roo Code shines here. It offers multiple built-in modes (Code, Architect, Debug, Ask, etc.) and lets you create fully custom modes with system prompts, tool restrictions, and temperature settings. For example, you can have a mode that only writes tests, or a mode that only reviews code. This enables structured workflows:

• Use Architect mode to design, then switch to Code mode to implement.
• Define a Security Reviewer custom mode that cannot modify files.
• Chain modes in tasks to enforce review before merge.

Verdict: If workflow control matters, Roo Code wins. For a simple agent, Cline suffices.

Model Support, BYO-Key Costs, and Token Usage

Both tools are bring-your-own-model — you supply an API key for any OpenAI, Anthropic, Google, or compatible provider. Neither adds markup on top of model costs. Pricing is identical: $0/mo for the extension, you pay only token usage. Example token prices from the live snapshot:

Both tools track token usage and allow setting per-task budgets. Neither has built-in cost optimization beyond what the model offers.

Verdict: Equal footing here. Both support the same providers and have no hidden fees.

Context Handling, Checkpoints, and Safety

Cline maintains a linear conversation with a maximum context window determined by the model. No built-in checkpoint system — if you want to roll back changes, you rely on Git or manual snapshots.

Roo Code introduces checkpoints. Each task execution can be saved as a checkpoint, allowing you to revert file changes to a previous state. This is a game-changer for safety: you can let the agent experiment and easily undo mistakes. Roo Code also offers task queues — you can schedule multiple tasks and review their results before applying them.

Additionally, Roo Code’s custom modes let you lock down tool usage per mode. For example, you can create a read-only mode that can only read files and run grep, preventing accidental modifications.

Verdict: Roo Code is significantly ahead in safety and context management.

Recommendation: When to Pick Cline, When to Pick Roo Code

Choose Cline if:

• You want a battle-tested, community-driven tool with the largest user base.
• You prefer simplicity — one mode, no configuration overhead.
• You already trust your workflow management to Git and other tools.

Choose Roo Code if:

• You need multiple agent roles (architect, coder, reviewer) in a single session.
• You want checkpoint rollback to experiment fearlessly.
• You require fine-grained control over which tools each mode can use.
• You plan to chain tasks in a production review pipeline.

Final word: Both are excellent, free, and open-source. Roo Code offers more features out of the box, but Cline’s simplicity and maturity make it a solid choice. The best tool depends on your workflow — but if you want the fullest set of capabilities in 2026, Roo Code pulls ahead.