Caliper
Shares rank 4 of 5 AI code reviewers by recommenders
Catches coding-agent convention violations at the end of each turn and has the model fix them before they pile up.
Catches coding-agent convention violations at the end of each turn and has the model fix them before they pile up.
5 people gave an opinion
- recommend it
- 5
- criticize it
- 0
- approval share
- 100%
Recommended in 5 of 13 months
- November 2025: not recommended
- December 2025: not recommended
- January 2026: recommended
- February 2026: not recommended
- March 2026: recommended
- April 2026: recommended
- May 2026: recommended
- June 2026: recommended
- July 2026: not recommended
- August 2026: not recommended
- September 2026: not recommended
- October 2026: not recommended
- November 2026: not recommended (month in progress)
Why it doesn’t carry the badge
- 5 people recommend itNeeds 10 or more, not met.
- Nobody criticizes itNeeds 2 to 1 or better, met.
- Recommended in 5 of 13 monthsNeeds 4 or more, met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Catches violations and has the model correct them
“Caliper catches those violations immediately and gets the model to make corrections before small issues become costly to unwind.”
Comment from 12 Apr 2026 in “Ask HN: What Are You Working On? (April 2026)” “We catch the violations at the end of the turn and direct Claude to correct them.”
Comment from 2 Apr 2026 in “Show HN: Forcing Claude Code to Write Maintainable TypeScript”
Other AI code reviewers people recommend
The four most recommended other AI code reviewers, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| Cursor Bugbot | 27 | 6 | 82% | 9 | — | Approved |
| GitHub Copilot code review | 14 | 26 | 35% | 8 | — | — |
| Greptile | 9 | 15 | 38% | 5 | — | — |
| CaliperThis page | 5 | 0 | 100% | 5 | — | — |
| Cubic AI code reviewer | 5 | 1 | 83% | 4 | — | — |
What people said
6 of the 9 comments that mention it, newest first. Each links to the original comment.
“It has a number of mechanisms that help substantially”
“Caliper catches those violations immediately and gets the model to make corrections before small issues become costly to unwind.”
“The results are pretty astounding - among early users, 40% of agent turns produce code that doesn't comply with a project's own conventions.”
“We catch the violations at the end of the turn and direct Claude to correct them.”
“I've been experimenting with some ideas about a very opinionated AI code reviewer”
“so can easily plug into existing tooling like DuckDB for analysis”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.