Devin vs Windsurf Pricing 2026: Agent Compute vs Flat Subscription
Devin and Windsurf both promise AI that writes real code, but they sit at opposite ends of the cost spectrum. Windsurf is a flat-rate AI editor starting at $15/month. Devin is an autonomous agent billed by Agent Compute Units (ACUs), where a single feature can cost more than a month of Windsurf. Understanding that gap is the whole decision.
The Plans Side by Side
| Tier | Devin AI | Windsurf |
|---|---|---|
| Free | None | Free — $0 (light daily quota) |
| Entry | Core — $20/mo + $2.25/ACU | Pro — $15/mo |
| Team | Team — $500/mo (250 ACUs, then $2.00/ACU) | Teams — $30/user/mo |
The $20 vs $15 entry price looks close. It isn’t. Devin’s $20 Core plan is pay-as-you-go — that $20 just buys platform access, and every task is billed separately at $2.25 per ACU. Windsurf’s $15 is the whole bill.
What an ACU Actually Costs
Devin measures work in Agent Compute Units. Here’s what real tasks consume:
| Task | ACUs | Cost (at $2.25/ACU) |
|---|---|---|
| Simple bug fix | 1–2 | $2.25–$4.50 |
| API endpoint creation | 3–5 | $6.75–$11.25 |
| Feature with tests | 5–8 | $11.25–$18.00 |
| Complex refactoring | 8–15 | $18.00–$33.75 |
| Full feature implementation | 10–20 | $22.50–$45.00 |
So a single full feature on Devin can cost $22–45 on top of your $20 platform fee — more than two months of Windsurf Pro. Build a few features in a month and Devin’s bill climbs into the hundreds.
Why the Models Aren’t Really Comparable
This isn’t an apples-to-apples price fight — it’s two different purchases:
- Windsurf is a tool you drive. The $15 flat fee covers your daily quota of premium AI interactions inside the Cascade agent, but you’re still the developer in the loop, writing and steering code. Unlimited Tab completions are included.
- Devin is a worker you delegate to. You hand it a task and it autonomously plans, codes, tests, and opens a PR with no editor time from you. You’re paying for autonomous labor measured in compute, not for a tool you operate.
That’s why Devin costs more: you’re buying outcomes, not assistance.
Which Is Cheaper for Your Situation?
- Steady daily coding, you in the driver’s seat → Windsurf, easily. $15/mo flat beats per-ACU billing for anyone actively writing code.
- Occasional autonomous delegation → Devin Core’s $20 + pay-as-you-go can be reasonable if you delegate only a few well-scoped tasks per month and value the hands-off PR.
- High-volume autonomous work → Devin Team at $500/mo includes 250 ACUs (then $2.00/ACU). Only worth it if you’re genuinely offloading a large, steady stream of tasks to the agent.
- Tight budget → Windsurf, including a genuinely usable free tier. Devin has no free tier.
The Bottom Line
For the overwhelming majority of developers, Windsurf is dramatically cheaper — a predictable $15/month versus Devin’s usage-billed model where a handful of features can cost $100+. Devin earns its price only when you’re truly delegating autonomous work and the time saved outweighs the per-ACU cost. They’re not really competitors so much as different line items: Windsurf is your editor, Devin is your contractor.
See the full Devin AI pricing breakdown and Windsurf pricing guide for exact numbers. For the capability comparison, read Devin vs Windsurf, and how to choose an AI coding assistant to frame the editor-vs-agent decision.
Compare Windsurf and Devin side by side → /pricing/windsurf