ChorusvsSeer
Generated from the two spec rows. Green marks the better value where a spec has a clear direction. Everything else is just different.
Chorus
Chorus · Code review agent
#53OSSMCP
Panel
7.26 spec wins
- Reliability
- 6.8
- Usefulness
- 7.3
- Cost
- 8.5
- Longevity
- 6.2
“There is a cockpit UI for watching four models argue about your pull request, which is entertainment filed as tooling.”
Seer
Sentry · Code review agent
#58MCP
Panel
6.52 spec wins
- Reliability
- 6.3
- Usefulness
- 6.5
- Cost
- 5.7
- Longevity
- 7.5
“It also reviews your code before you ship it, so the thing that finds your bugs in production had opinions about them in advance.”
Spec by spec
| Spec | Chorus | Seer |
|---|---|---|
| Architecture | ||
| Category | Code review agent | Code review agent |
| Runs | local | cloud |
| Platforms | macos, linux, windows | web |
| Context window | not documented | not documented |
| Protocols | ||
| MCP client | No | No |
| MCP server | Yes | Yes |
| Capabilities | ||
| Runs terminal commands | Yes | No |
| Multi-file edits | NoChorus reviews rather than edits; the fix goes back to whichever agent wrote the code. | YesThrough Autofix's generated code changes, which are delivered as a pull request. |
| Git operations | No | YesSeer creates pull requests on GitHub and merge requests on GitLab; only the cloud versions of both hosts are supported. |
| Browser control | No | No |
| Sandboxed execution | No | No |
| Multi-agent orchestration | YesA run fans the same diff out to two to four different vendor CLIs in parallel and compares their verdicts. | No |
| Headless / CI mode | YesChorus can be called from scripts and CI, though calling it from `codex exec` requires --dangerously-bypass-approvals-and-sandbox because Codex blocks MCP tools there. | Yes |
| Models | ||
| Backbone | Claude Code, Codex CLI, Gemini CLI, OpenCode, Kimi CLI | undisclosed |
| Bring your own model | Yes | No |
| Local models | No | No |
| Cost | ||
| Pricing model | byok | seat |
| Starts at | $0/mo | n/a |
| Free tier | Yes | No |
| Bring your own key | Yes | No |
| Openness | ||
| Open source | Yes | No |
| License | Apache-2.0 | proprietary |
| GitHub stars | 533 | n/a |
Which one would each critic pick
| Critic | Chorus | Seer | Pick |
|---|---|---|---|
| El Juez | — | — | not enough reviews |
| El Amigo | 7.5 | 7.0 | Chorus — Pick it if you have stopped trusting a model to grade its own homework; pick a single hosted reviewer if one opinion is all your team has time to read. |
| El Crítico | 6.8 | 6.5 | Chorus — Calling it from codex exec requires --dangerously-bypass-approvals-and-sandbox, so the automated path to one of its own reviewers runs with the guard rails switched off. |
| El Profesor | 7.3 | 6.8 | Chorus — Agreement between vendors is used as the pass condition, which substitutes inter-rater consensus for correctness with no published relationship between the two. |
| La Inversora | 6.5 | 7.8 | Seer — Selling this as an add-on to an existing subscription is the cheapest distribution in the category: the data moat was already paid for by the monitoring product. |
| La Jefa | 7.3 | 6.8 | Chorus — A global npm install on sixty desks, no seat licence, and a review step that genuinely runs headless: cheap, unmanaged, and invisible to every system I report from. |
| El Hacker | 8.0 | 4.3 | Chorus — Apache-2.0, chorus init registers it as an MCP server with every CLI and IDE it finds, exposing nine tools, and the daemon and its history stay on my machine. |
Picks are derived from each critic's own scores. Humans vote on matchups on the duels page.