Devin vs Windsurf: Autonomous Agent vs AI IDE

Devin is an autonomous coding agent - you give it a task, it works independently in a cloud environment, and you review the result. Windsurf is an AI-powered IDE where you write code with AI assistance throughout the session. One replaces your junior developer for a task. The other amplifies your own coding.

Windsurf runs locally on your machine as a VS Code-based editor. Its Cascade agent can handle multi-step coding tasks, but you stay present - reviewing, guiding, and approving changes. Devin runs entirely in the cloud, managing its own environment, running tests, and pushing commits without you watching.

Since Cognition acquired Windsurf in July 2025 for approximately $250 million (TechCrunch, July 2025), both products sit under the same company. As of April 2026, they remain separate tools with separate pricing - the integration roadmap has not yet materialised into a combined product.

Windsurf is significantly cheaper for individual developers. The free plan includes 25 credits per month, which covers casual use. The Pro plan is $15/month for 500 credits. Teams pay $30 per user per month. Enterprise with ZDR and HIPAA defaults costs $60 per user per month.

Devin's pricing model works differently. The Core plan starts at $20/month but charges per Agent Compute Unit (ACU) on a pay-as-you-go basis at $2.25 per ACU. One ACU equates to roughly 15 minutes of Devin's active work, so an hour of work costs around $9. The Team plan at $500/month includes 250 ACUs at a discounted $2.00 per ACU. Enterprise pricing is negotiated separately.

For a solo developer doing 20 hours of AI-assisted coding per week, Windsurf Pro at $15/month is straightforward. Devin's cost depends entirely on how many tasks you delegate and how complex they are. A single 4-hour task could consume $36 in ACUs alone.

Windsurf wins for daily development experience. It ranked number 1 in the LogRocket AI Dev Tool Power Rankings in February 2026, ahead of Cursor and GitHub Copilot. You work inside a familiar VS Code environment with Cascade providing inline suggestions, multi-file edits, and context-aware chat.

Devin works through a web dashboard. You write a task specification, watch Devin plan its approach, and receive updates as it works. Devin 2.0 added an interactive planning step where you can review and edit Devin's plan before it starts coding - which reduces wasted ACUs on misunderstood requirements.

Devin also includes Devin Search and Devin Wiki, which automatically index your repository every few hours and generate architecture diagrams. These are useful for onboarding to unfamiliar codebases, but they are not a substitute for the fluid back-and-forth of active development inside an IDE.

Devin 2.0 scores 13.86% on SWE-bench, resolving real GitHub issues end-to-end - a 7x improvement over earlier AI models. In practice, it performs best on well-scoped, verifiable tasks: fixing known bugs, adding tests, updating dependencies, writing boilerplate. It struggles with ambiguous requirements, large architectural decisions, and tasks that need human judgment mid-way through.

Windsurf's SWE-1.5 model scores 40.08% on SWE-bench at 950 tokens per second (Codeium, 2025). The higher benchmark reflects the human-in-the-loop model - Cascade is faster at reaching a correct outcome when a developer is guiding it. Windsurf's Cascade Hooks, released in late 2025, allow custom logic at specific points in the AI pipeline for compliance and policy enforcement.

The key limitation for Devin is cost unpredictability. A task that takes 3 hours of Devin time costs significantly more than expected if your brief was unclear. The key limitation for Windsurf is that you must be present - it cannot work overnight or in parallel with other tasks.

Most teams that use both tools treat them as complementary rather than competing. Windsurf is the daily IDE that every developer uses for active feature work. Devin handles the backlog of maintenance tasks, test coverage, and repetitive fixes that nobody wants to do manually.

Enterprise teams reported to analysts that Devin resolves security vulnerabilities in 1.5 minutes per issue versus 30 minutes for a human developer - a 20x improvement on well-structured tasks. This kind of repeatable, high-volume work is where Devin's asynchronous model pays off. You queue up 50 security patches and review the pull requests the next morning.

Windsurf's Teams plan at $30/user/month includes admin controls, SSO, and shared repo settings. Devin's Team plan at $500/month gives 250 ACUs shared across the team. For a 10-person engineering team, a realistic setup is Windsurf Teams for everyone plus Devin Team for the tasks that warrant it.

Choose Windsurf if you need a better IDE today. It is free to start, works with your existing workflow, and delivers immediate productivity gains through Cascade's multi-file editing and context-aware suggestions. Most individual developers and small teams will get more value from Windsurf than Devin at the same spend.

Choose Devin if you have a consistent backlog of scoped development tasks and the budget to delegate them. The sweet spot is maintenance work with clear inputs and verifiable outputs - bug fixes, test suites, dependency upgrades, documentation updates. Devin's value is in reclaiming the hours your team spends on work that does not need them.

If you are evaluating both, start with Windsurf. It requires no workflow change and costs nothing to trial. Devin requires you to write good task specifications - a skill that takes practice. Teams that adopt Devin successfully usually have 3-6 months of Windsurf usage behind them and a clear picture of which tasks they want to delegate.