CodeAnt AI and CodeRabbit both document CLI review of local changes and custom review guidance. CodeAnt CLI documents a file-count and per-file line limit. Its current numeric paid review quote was not verified, so a fabricated price comparison would obscure the useful scope decision.
| Decision | CodeRabbit | CodeAnt AI |
|---|---|---|
| Review scope | Pull requests, local changes, and agent-loop review. | PR, IDE and CLI review; documented CLI limit: 10 files/review and 5,000 lines/file. |
| Local review input | CLI and IDE review committed and uncommitted changes. | CLI reviews uncommitted, staged, committed and base-branch changes; MCP support. |
| Custom requirements | Guideline files and natural-language pre-merge checks; custom-check allowances depend on plan. | English custom rules and path patterns. |
| License and service | Commercial review service. | Commercial review platform. |
| Official references | CodeRabbit sources | CodeAnt AI sources |
Use a change near the documented file limit and a large-file repair. Record which files were actually inspected and obtain the current CodeAnt quote before calculating a monthly bill.
Essentials: $24/user/month billed annually, or $30 monthly. Public-repository reviews are free.
Essentials annual subscription floor; 1 repository and 5 included reviews/developer/hour. Eligible extra reviews cost 25¢ per reviewed file. Built-in checks are included; custom pre-merge checks start on Team.
14-day trial and free qualifying OSS access. The current numeric review-plan price was not verifiable.
Ask the vendor for current paid pricing. Perch has no method-count cap within its selected parsed-method scope; context and ignored paths still define coverage.
Subscription amounts are plan floors or quoted allowances. Repeated reviews, selected effort, provider charges and exclusions can change the bill. Equal review counts do not establish equal analysis scope.
A third option for the agent’s next edit
Perch is a stronger fit for selecting a project, file or method requirement on the working code. Its check-based price is published; selectors, parsing and context still determine scope.
For an agent that repeatedly removes tenant authorization from a database update, save the requirement as a named Perch rule:
- name: tenant-scoped-update
where: "orders.py"
ensure: >-
The cancellation UPDATE must constrain tenant_id to actor.tenant_id
before changing the order. An id-only or owner-only update breaks
this requirement.This requirement comes from the FastAPI tenant-authorization recipe, which includes the implementation, deliberate regression and captured Perch checks. The same named check can run against the working file after the next agent edit. Perch working-file checks support selecting rules directly; rule selectors cover project, file and method scope.
npm install -g @lakeday/perch
perch login
perch setup claude-code
# Or choose: perch setup codex
# Or choose: perch setup cursorUse the setup command for your coding agent. Download the focused pack without replacing existing files:
curl -fL 'https://reporules.fyi/fastapi/tenant-cancellation/rule-pack.zip' -o tenant-rule.zip
unzip -n tenant-rule.zip
perch check orders.py --rules tenant-scoped-update --json
# Repair the reported finding after the agent edit.
perch check orders.py --rules tenant-scoped-update --jsonKeep your existing root perch.yaml. The ZIP adds its focused rule under .perch/rules/; unzip -n preserves existing files. Review and adapt the selector and application path before running it in your repository. Run the saved check after an edit, repair any finding, and repeat the identical check alongside application regression tests.
Download the tenant-authorization rule pack · Inspect pack contents and agent task
Perch charges 10¢ per 1,000 fresh rule checks, with no developer seat fees. Cached unchanged checks are free. About 50¢ per mid-sized PR is a rounded estimate for approximately 150 methods read at the captured September–October 2026 density of 34 questions per method; the unrounded example is 51¢. A single named-rule check is a different scope. Team workload calculations show the assumptions.
The Perch CLI is MIT licensed; hosted analysis is paid and relevant source is sent to the configured model service. Fresh model judgments can vary. Unchanged requests can reuse cached results.
This article compares documented product workflows and terms. The public evaluation materials include captured Perch requirement checks; authenticated CodeRabbit and Greptile runs remain unscored. They do not establish a measured accuracy ranking between these tools.
Reviewed October 14, 2026. Unverified features are marked as unverified rather than treated as absent. Current terms and actual trial results should determine a purchase.