# Gerrit vs Mercurial

| Attribute | Gerrit | Mercurial |
|---|---|---|
| **Vioscale score** | 50.7 (54% (medium)) | 64.2 (14% (low)) |
| activity.commits_last_30d | 100 | - |
| adoption.dependent_repos | 0 | - |
| adoption.github_stars | 1,220 | - |
| adoption.package_downloads_weekly | 60,170 | 86,972 |
| deployment.options | `{"self_hosted":true}` | `{"self_hosted":true}` |
| description.long | An open-source web-based code review system that uses patchset-based review workflows similar to traditional mailing list practices. It provides fine-grained access controls, scales to thousands of developers, and integrates with CI/CD pipelines through a REST API and extensible plugin architecture. | Mercurial is an open-source, distributed version control tool designed to efficiently handle projects of any size. It provides each developer with a complete copy of the project history, enabling fast local operations and flexible collaboration workflows. |
| features.capabilities | `{"hosting":"self","vcs_model":"centralized","api_surface":"REST","built_in_ci":false,"code_review":"gerrit_change_based","license_model":"free","monorepo_scale":true,"underlying_vcs":"Git","open_source_core":"open_source"}` | `{"hosting":"self","vcs_model":"distributed","api_surface":"CLI","built_in_ci":false,"code_review":"none","license_model":"free","sso_saml_scim":false,"underlying_vcs":"Mercurial","open_source_core":"open_source"}` |
| language.primary | Java | Python |
| license.spdx | Apache-2.0 | - |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"web":true}` | `{"cli":true,"mac":true,"linux":true,"windows":true}` |
| pricing | `{"type":"open_source","freeTier":true,"sourceUrl":"https://www.gerritcodereview.com/","retrievedAt":"2026-08-13T23:01:24.482Z"}` | `{"type":"free","freeTier":true,"sourceUrl":"https://www.mercurial-scm.org","retrievedAt":"2026-08-14T21:35:30.923Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | free |
| pricing.price_level | free | free |
| pricing.transparent | yes | - |
| security.scorecard | 3.2 | - |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2FGerritCodeReview%2Fgerrit&per_page=100","last_12m":0,"max_severity":null}` | - |

## Capabilities (Version Control)

| Capability | Gerrit | Mercurial |
|---|:--:|:--:|
| **Model** |  |  |
| VCS model | Centralized | Distributed |
| Underlying VCS supported (Git / Mercurial / SVN / Perforce / multiple) | Git | Mercurial |
| **Deployment** |  |  |
| Hosting | Self-hosted only | Self-hosted only |
| **Review** |  |  |
| Code review | Gerrit change-based | None (engine only) |
| **Storage** |  |  |
| Large-file / binary handling | - | - |
| **Scale** |  |  |
| Monorepo scale (partial clone / sparse / VFS) | ✓ | - |
| **DevOps** |  |  |
| Built-in CI | ✗ | ✗ |
| **Access** |  |  |
| Access control granularity | - | - |
| **Federation** |  |  |
| Federation / decentralisation (ActivityPub / email) | - | - |
| **Licensing** |  |  |
| Open-source core | Open-source | Open-source |
| Self-managed license model | Free | Free |
| **Integration** |  |  |
| API surface (REST / GraphQL / webhooks) | REST | CLI |
| **Enterprise** |  |  |
| SSO / SAML / SCIM | - | ✗ |
| **Security** |  |  |
| Signed commits / supply-chain (GPG / SSH / sigstore) | - | - |

*Source: Vioscale. Generated 2026-09-01T14:46:36.986Z. "-" = undocumented, not absent.*