| What it does | Verification for code your AI agent writes
| Learn programming by building real software with an AI tutor
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| Stage | MVP
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| Founded | Not given
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| Based in | US
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| Pricing model | Freemium
| Freemium
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| Pricing | Free: $0, 20 free reviews per month on public GitHub repos, no card required. Solo: $25/month ($20/month billed annually), includes 20 reviewed changes per month, private repo access, full reviewer catalog. Team: $25/user/month ($20 billed annually, 3 seat minimum), 20 reviewed changes per seat mont
| Free: 2,000 credits once, no card required. Learner: 5,000 credits/month. Scholar: 11,000 credits/month. Fellow: 38,000 credits/month. Campus: contact for pricing. One-time top-ups available. Yearly plans offer 2 months free.
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| Key features | - Change-impact analysis showing callers, implementations, and removed code references
- Two independent reviewers (Codex and Claude) with parallel verification and reconciliation
- Five surfaces: MCP, CLI, Web, GitHub App, API
- MCP integration for agent verification before commit
- GitHub App for automatic pull request reviews
- Grounded findings with file, line, and evidence for each issue
- Per-review model selection on paid plans
- No repository connection required; only files from the agent are read
- Code review artifact retention and export
| - In-browser code editor and terminal for writing and running code
- Structured syllabuses with lessons that must be completed in order
- Knowledge checks after each lesson to verify understanding
- Final assessments taken without tutor assistance
- Generate custom courses for topics not in the catalog
- Progress is saved and can be resumed exactly where left off
- Credit-based usage allows flexible learning without seat-based fees
- Unused monthly credits roll over for up to two months
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| What makes it different | - Checks code context outside the diff, not just the change itself
- Dual independent reviewer reconciliation catches contradictions humans need to judge
- Only grounded findings block; AI certainty is not enough
- Does not train on customer code and never will
- Integrates with coding agents before commit to catch issues early
| - Full syllabus visible upfront before starting any lesson or course
- No expiring free credits: 2,000 credits to learn risk-free without providing payment info
- Projects run in the browser without requiring software installation
- Generate custom syllabuses on demand for any language or topic
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| Free plan | Not given
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| Open source | Not given
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| Platforms | Not given
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| Public API | Not given
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| Community votes | 0 | 0 |
| DR (Domain Rating by Ahrefs) | 3 ▲ +1 (up) since last check | 9 ● no change since last check |
| Trust Flow (Majestic) | 1 | 5 |
| Citation Flow (Majestic) | 25 | 30 |
| Referring domains (Majestic) | 20 | 87 |