Kiro vs Windsurf
A side-by-side comparison of capabilities, autonomy, integrations, and pricing to help you choose.
Short answer: choose Kiro if you want aws's spec-driven agentic ide for structured software engineering (Supervised agent, freemium); choose Windsurf if you want agentic ai ide whose cascade agent edits across your codebase (Supervised agent, freemium).
| Kiro | Windsurf | |
|---|---|---|
| What it is | AWS's spec-driven agentic IDE for structured software engineering | Agentic AI IDE whose Cascade agent edits across your codebase |
| Type | product-with-agents | agent |
| Autonomy | Supervised agent | Supervised agent |
| Pricing | freemium · $0 (Free, 50 credits); Pro $20/mo | freemium · Free tier; Pro $20/mo |
| Best for | developers, mid-market, enterprise | developers, mid-market, enterprise |
| Deployment | saas, api | saas |
| Modalities | text, code | text, code |
| Models | claude, open-source, model-agnostic | claude, proprietary, model-agnostic |
| Protocols | mcp, function-calling | mcp, function-calling |
| Integrations | Amazon Bedrock, AWS IAM Identity Center, MCP servers, Amazon Q Developer (migration) | GitHub, MCP servers, VS Code extensions ecosystem, Devin |
| Capabilities | 4 documented | 3 documented |
Kiro
- +Spec-first workflow makes AI output more reviewable, auditable, and team-ownable than free-form prompting
- +Model-flexible via Amazon Bedrock (Claude, DeepSeek, MiniMax, open-weight) with task-based routing
- +Backed by AWS with enterprise auth (SAML/SCIM SSO) and a migration path from Amazon Q Developer
- -Credit-based usage can get expensive and unpredictable at scale, and unused credits do not roll over
- -The requirements/design/tasks process adds overhead versus lightweight assistants for quick edits
Windsurf
- +Cascade does genuine multi-step, multi-file agentic work inside a familiar VS Code-style editor
- +Ships a fast in-house coding model (SWE-1.5) and can also run frontier models like Claude
- +After the Cognition acquisition, integrates Devin as a cloud agent for delegated tasks
- -Quota and credit changes after the acquisition have shifted what each tier includes
- -Multi-step agent runs still need human review; not a hands-off autonomous engineer
Which should you choose?
Kiro is aws's spec-driven agentic ide for structured software engineering, best for developers, mid-market, enterprise. Windsurf is agentic ai ide whose cascade agent edits across your codebase, best for developers, mid-market, enterprise. The right choice depends on the autonomy level you want, your existing integrations, and your budget, all compared above.