OpenReviewvsProval
Generated from the two spec rows. Green marks the better value where a spec has a clear direction. Everything else is just different.
OpenReview
Vercel Labs · Code review agent
#226OSS
Panel
5.74 spec wins
- Reliability
- 5.8
- Usefulness
- 5.8
- Cost
- 6.2
- Longevity
- 5.0
“Review behaviour extends through skills in a .agents/skills directory, so your review bot now has a professional development plan.”
Proval
seoes · Code review agent
#211OSS
Panel
5.94 spec wins
- Reliability
- 5.7
- Usefulness
- 5.7
- Cost
- 7.3
- Longevity
- 5.0
“It can be configured to reply only when mentioned, a courtesy no human reviewer has ever extended to anyone.”
Spec by spec
| Spec | OpenReview | Proval |
|---|---|---|
| Architecture | ||
| Category | Code review agent | Code review agent |
| Runs | cloud, sandbox | local, cloud |
| Platforms | web | linux, web |
| Context window | not documented | not documented |
| Protocols | ||
| MCP client | No | No |
| MCP server | No | No |
| Capabilities | ||
| Runs terminal commands | Yes | No |
| Multi-file edits | Yes | No |
| Git operations | Yes | Yes |
| Browser control | No | No |
| Sandboxed execution | YesEach review runs in an isolated Vercel Sandbox that is torn down afterwards. | No |
| Multi-agent orchestration | No | Yes |
| Headless / CI mode | Yes | Yes |
| Models | ||
| Backbone | Claude Sonnet | OpenAI-compatible, Ollama, llama.cpp |
| Bring your own model | No | Yes |
| Local models | No | Yes |
| Cost | ||
| Pricing model | byok | byok |
| Starts at | n/a | $0/mo |
| Free tier | No | Yes |
| Bring your own key | Yes | Yes |
| Openness | ||
| Open source | Yes | Yes |
| License | unspecified | AGPL-3.0 |
| GitHub stars | 1,696 | 102 |
Which one would each critic pick
| Critic | OpenReview | Proval | Pick |
|---|---|---|---|
| El Juez | — | — | not enough reviews |
| El Amigo | 5.8 | 6.3 | Proval — Pick it if your reviewers are the bottleneck and you want a first pass before a human looks; pick nothing if your problem was never the queue. |
| El Crítico | 5.3 | 4.8 | OpenReview — A pull-request comment starts a run with full repository access and push rights, so the trigger surface is everyone who can comment, not everyone who can merge. |
| El Profesor | 7.0 | 6.0 | OpenReview — The review executes linters, formatters and the test suite inside the environment rather than reasoning about them, which is the only honest form of verification here. |
| La Inversora | 5.3 | 4.5 | OpenReview — This is a labs release, not a product: no hosted tier, no price, and the commercial logic is that every review burns the parent's platform compute. |
| La Jefa | 5.3 | 6.3 | Proval — One container image against our own Git host, which is the shortest path to production on this board, and there is still no console and no audit export. |
| El Hacker | 5.8 | 7.8 | Proval — AGPL-3.0 and it takes any compatible endpoint, including Ollama and llama.cpp, so the one tool that reads all my code never has to phone anyone. |
Picks are derived from each critic's own scores. Humans vote on matchups on the duels page.