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Spec Kit vs Kiro: catalog facts
Spec Kit	Kiro
Free Free and open source from GitHub.	Freemium Free to start, with paid plans that include usage credits.
Command line	Command line
Structured spec-first workflow for AI agents Works with several coding agents through integrations	Spec-driven workflow from requirements to tasks Property-based tests to check correctness
Adds process overhead for small changes Still requires a separate AI coding agent	Relies on cloud AI models and an account Heavier use requires a paid plan
Downloadable app	Downloadable app
Open source	Closed source
License not stated	License: Proprietary
No account needed	Account needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.