Kiro

AWS's agentic IDE (plus CLI/web) with spec-driven development and agent hooks.

Best for: Spec-first feature work and teams on AWS.
Open source: no (unconfirmed: no official repo checked)
Pricing: Free $0 (50 credits); Pro $20/user/mo; Pro+ $40; Pro Max $100; Power $200; add-on credits $0.04 each. (source: official page, checked 2026-10-16)
Other IDE agents: Cline, Zed (agent), Continue, Augment Code

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Pricing is copied from each tool's official page on the date shown and left out where we couldn't read it; prices change. Licences were checked on GitHub; 'unconfirmed' means not verified. No affiliate links.