What is Kiro?

Kiro is an agentic coding environment built and operated by AWS. It helps developers turn prompts into executable specifications, architectural designs, and sequenced tasks before implementation.

Kiro can implement work with parallel agents, validate requirements, run property-based tests, operate locally or in cloud sessions, review PRs, and integrate with tools such as Figma, Terraform, GitHub, GitLab, and CI/CD.

It supports Anthropic Claude, open-weight models, and an Auto mode that selects models based on quality, latency, and cost. Kiro offers a perpetual free tier and credit-based paid plans for individuals, teams, and enterprises.

Key Features

Spec-driven development

Translate prompts into requirements, architecture, and sequenced tasks so implementation follows an explicit plan.

Parallel agents

Run implementation tasks in parallel locally, in Kiro Crew, or in cloud sessions.

Correctness checks

Use automated requirement analysis and property-based tests to catch edge cases that ordinary unit tests may miss.

Developer ecosystem

Use ACP, AGENTS.md, Skills.md, MCP, Open VSX extensions, CLI, and more than 500 supported command-line tools.

How to Use Kiro

Download Kiro or install the CLI.
Open a repository and describe the desired change or feature.
Review generated requirements, architecture, and task sequence.
Run implementation agents and inspect code changes and tests.
Use CLI or CI/CD workflows for PR review, bug fixing, and automated checks.

Use Cases & Who It's For

Engineers: Implement features from structured specs rather than ad-hoc prompts.
Teams: Parallelize coding tasks across large repositories.
Platform teams: Add PR review and property-based checks to CI/CD.
Enterprises: Manage SSO, usage, billing, and governance controls.

Pricing & Free Plan

Kiro is freemium. Kiro Free costs $0 per month and includes 50 credits plus access to open-weight models and Claude Sonnet 4.5, subject to rate limits. Paid plans are Pro at $20 per user per month with 1,000 credits, Pro+ at $40 with 2,000 credits, Pro Max at $100 with 5,000 credits, and Power at $200 with 10,000 credits. Add-on credits cost $0.04 each.

New users who first upgrade using social login or AWS Builder ID receive $20 credited toward a subscription. Enterprise plans add centralized billing, SSO, usage analytics, and security controls. Prices exclude applicable taxes unless noted.

Strengths & Limitations

Strengths

Combines specs, agents, tests, and code review in one engineering workflow.
Perpetual free tier and clear user-based paid tiers.
Supports Claude, open-weight models, and automatic model selection.
Built on AWS enterprise security and administration controls.

Limitations

Credits vary by model and task complexity.
Premium model availability differs by region.
Agentic code changes still require review and testing.
GovCloud pricing is higher and does not include the free tier.

Alternatives & When to Choose It

Compare Kiro with Devin for cloud AI software engineering, OpenCode for an open-source terminal agent, and Cursor or GitHub Copilot for IDE-centric completion. Choose Kiro for spec-driven development, parallel agents, property-based tests, and AWS enterprise controls.

Frequently Asked Questions

Is Kiro free?

Yes. Kiro Free includes 50 credits and limited access to open-weight models and Claude Sonnet 4.5.

Who operates Kiro?

The official site says Kiro is built and operated by AWS.

Sources & Verification

Official website: Kiro
Pricing: Kiro pricing
Last checked: 2026-09-21
Verification: Official homepage and pricing pages were archived and reviewed. The seo.box entry pointed to the product's app or workspace subdomain; this record uses the official product root domain. No paid subscription or generation was performed.

Kiro

Overview