Quick answer

Kiro is Amazon's AI development environment, a VS Code fork built around "spec-driven development": you describe a feature, Kiro drafts requirements, a design document, and a task list, and only then generates code. Agent hooks run automatically on events such as saving a file. There is a free tier with a monthly allowance of agent interactions and a Pro plan from $19 a month. It suits teams that want AI-written code to be maintainable more than they want it to be instant.

Most AI coding tools optimise for the moment you type a prompt and code appears. Kiro optimises for the week after, when someone has to understand, test, and change that code. That difference in emphasis is the whole product, and whether you like Kiro depends on which of those moments costs you more.

What spec-driven development looks like

Start a feature in Kiro and instead of code you get three files. The requirements file turns your prompt into user stories with acceptance criteria written in a structured given-when-then style. The design file describes the architecture, data models, and interfaces the feature needs. The tasks file breaks the work into ordered steps, each of which you can run as an agent job. You can edit any of the three before code exists, which is where the value sits: correcting a misunderstanding in a requirements file takes seconds, while correcting it after five hundred lines of generated code takes an afternoon.

Hooks and steering

  • Agent hooks fire on file events: save a component and a hook can update its tests; commit and a hook can refresh the documentation or scan for secrets
  • Steering files are persistent project rules the agent reads on every task, such as coding standards, preferred libraries, and things it must never touch
  • MCP support connects external tools and data sources, the same way Cursor and Claude Code do
  • Because it is a VS Code fork, your extensions, keybindings, and themes carry over

Where it is slower, and where that is fine

For a quick one-line fix Kiro is slower than Cursor, because it wants to plan first. You can still chat and make direct edits without the spec flow, but the tool nudges you toward it. Developers who spend their days on small edits in a codebase they know well will find that friction annoying. Teams building new features, onboarding contractors, or maintaining code that several AI tools have already touched tend to find the planning step pays for itself.

Pricing

The free tier includes a monthly allowance of agent interactions, enough to evaluate the workflow but tight for daily professional use. Pro starts at $19 a month with a larger allowance, and heavier tiers are available. Compared with Cursor at $20, the entry prices are similar; the difference is how many interactions a spec-driven workflow consumes, since each spec, design, and task step counts.

Related reading

Cursor vs Windsurf vs Claude Code Best AI coding tools in late 2026 What is spec-driven development?

Kiro is a bet that the bottleneck in AI-assisted development has moved from writing code to maintaining it. If your team has already felt that shift, it is worth a trial. If you are still in the phase where speed is everything, Cursor will feel better.

Bottom line

Kiro is the most thoughtful answer yet to the maintainability problem of AI-generated code. It trades speed for structure, and that trade is right for a specific kind of team. Try it on one real feature, read the spec files it produces, and you will know within an hour whether the approach fits.