Works on code you already have
Breakspec checks code your agent already wrote, in Claude Code, Cursor, Codex or by hand. There’s no spec to write first.
Compare · Checked 12 October 2026
Breakspec vs Kiro
Kiro is the closest thing to Breakspec. You write requirements in Kiro’s spec format, and it tests them against your code with lots of random inputs, then shows you the simplest one that fails. The difference is where that happens: inside Kiro’s own editor, as part of building a feature there.
What Kiro does
- Its tests come from requirements you write in a Kiro spec.
- Kiro’s docs say this testing only works in its editor, and that it’s optional.
- When a test fails, Kiro shows the simplest failing input, and can update the code, the test or the spec.
How Breakspec is different
Every pull request
Approved rules are rechecked on every pull request, before each commit, or from your terminal, without AI.
A person approves
Your agent can suggest rules but can’t approve them. If a fix special-cases the failing example, or someone edits a rule to make it pass, Breakspec flags it.
| Kiro | Breakspec | |
|---|---|---|
| Where it works | Kiro’s editor | Your terminal, GitHub, commits, Claude Code, Cursor, Codex |
| Where rules come from | Requirements you write in a Kiro spec | Plain English rules for code you already have |
| Checks every pull request | Not mentioned in Kiro’s docs | Yes |
| Shows the simplest failing example | Yes | Yes |
| Catches a fix that cheats | Not mentioned in Kiro’s docs | Yes |
What Kiro does better
- If you’re building a new feature from scratch in Kiro, its requirements, design and tasks fit together.
- Its specs plan the whole feature, not just the tests.
Can I use both?
Yes. Building in Kiro? Breakspec still adds the pull request check, the human approval, and coverage for code written outside Kiro.
Sources
Checked on 12 October 2026, from Kiro’s own docs and pricing pages. Prices and features change; if something here is out of date, tell us at sales@breakspec.com and we’ll fix it.
Other comparisons
Your agent’s own testsTests the agent wroteCodeRabbitAI code reviewGreptileAI code reviewGitHub Copilot code reviewAI code reviewCursor BugbotAI code reviewClaude Code ReviewAI code reviewCodex code reviewAI code reviewQodoAI code reviewDiffblue CoverTest generationSonarQubeStatic analysisWriting property tests yourselfTesting libraries