# Maildev vs MailHog

| Attribute | Maildev | MailHog |
|---|---|---|
| **Vioscale score** | 63.8 (24% (low)) | 42.8 (19% (low)) |
| activity.commits_last_30d | 24 | 0 |
| adoption.dependent_repos | 313 | 11 |
| adoption.github_stars | 6,032 | 16,138 |
| deployment.options | `{"self_hosted":true}` | `{"cloud":true,"self_hosted":true}` |
| description.long | Runs as a local SMTP server with a web inbox interface to capture and review emails generated by your application during development. Supports AI agent integration through the Model Context Protocol for automated email inspection. | MailHog intercepts and stores SMTP messages during development, providing a web UI and JSON API for viewing and managing test emails, with the option to forward messages to real mail servers. |
| features.capabilities | - | `{"open_source":true,"sms_testing":false,"api_assertions":true,"spam_score_check":false,"ci_cd_integration":false,"rendering_preview":true,"multi_user_inboxes":true,"production_sending_addon":true,"blocklist_deliverability_check":false}` |
| language.primary | TypeScript | Go |
| license.spdx | MIT | MIT |
| platform.support | `{"cli":true,"web":true}` | `{"mac":true,"web":true,"linux":true}` |
| pricing | `{"type":"free","summary":"Free & open source (MIT)","freeTier":true,"sourceUrl":"https://maildev.github.io/maildev/","retrievedAt":"2026-08-20T16:30:07.523Z"}` | - |
| pricing.free_tier | yes | - |
| pricing.model | commercial | commercial |
| pricing.price_level | free | - |
| pricing.transparent | yes | - |
| release.cadence_days | 46 | 11 |
| release.history | `[{"url":"https://github.com/maildev/maildev/releases/tag/maildev%403.0.0-rc.1","date":"2026-07-06T19:40:50Z","type":"stable","version":"maildev@3.0.0-rc.1"},{"url":"https://github.com/maildev/maildev/releases/tag/v2.2.1","date":"2024-12-12T02:09:20Z","type":"stable","version":"v2.2.1"},{"url":"https://github.com/maildev/maildev/releases/tag/v2.1.0","date":"2023-07-20T01:57:33Z","type":"stable","version":"v2.1.0"},{"url":"https://github.com/maildev/maildev/releases/tag/v2.0.5","date":"2022-05-18T16:10:38Z","type":"stable","version":"v2.0.5"},{"url":"https://github.com/maildev/maildev/releases/tag/v2.0.4","date":"2022-05-17T21:24:00Z","type":"stable","version":"v2.0.4"},{"url":"https://github.com/maildev/maildev/releases/tag/v2.0.2","date":"2022-03-23T07:56:47Z","type":"stable","version":"v2.0.2"},{"url":"https://github.com/maildev/maildev/releases/tag/v2.0.1","date":"2022-03-23T03:43:18Z","type":"stable","version":"v2.0.1"},{"url":"https://github.com/maildev/maildev/releases/tag/v2.0.0","date":"2022-03-22T16:22:09Z","type":"stable","version":"v2.0.0"},{"url":"https://github.com/maildev/maildev/releases/tag/v1.1.1","date":"2022-03-22T16:08:54Z","type":"stable","version":"v1.1.1"},{"url":"https://github.com/maildev/maildev/releases/tag/v1.1.0","date":"2019-07-27T21:57:24Z","type":"stable","version":"v1.1.0"},{"url":"https://github.com/maildev/maildev/releases/tag/1.0.0","date":"2019-03-19T02:36:24Z","type":"stable","version":"1.0.0"},{"url":"https://github.com/maildev/maildev/releases/tag/0.14.0","date":"2016-08-13T16:24:32Z","type":"stable","version":"0.14.0"},{"url":"https://github.com/maildev/maildev/releases/tag/0.13.4","date":"2016-07-01T22:58:28Z","type":"stable","version":"0.13.4"},{"url":"https://github.com/maildev/maildev/releases/tag/0.13.3","date":"2016-05-16T04:11:12Z","type":"stable","version":"0.13.3"},{"url":"https://github.com/maildev/maildev/releases/tag/0.13.2","date":"2016-05-14T18:25:02Z","type":"stable","version":"0.13.2"},{"url":"https://github.com/maildev/maildev/releases/tag/0.13.1","date":"2016-04-22T03:17:26Z","type":"stable","version":"0.13.1"},{"url":"https://github.com/maildev/maildev/releases/tag/0.13.0","date":"2016-03-20T20:45:31Z","type":"stable","version":"0.13.0"},{"url":"https://github.com/maildev/maildev/releases/tag/0.12.2","date":"2016-03-08T03:05:13Z","type":"stable","version":"0.12.2"},{"url":"https://github.com/maildev/maildev/releases/tag/0.12.1","date":"2015-11-07T23:18:35Z","type":"stable","version":"0.12.1"},{"url":"https://github.com/maildev/maildev/releases/tag/0.12.0","date":"2015-08-26T04:51:51Z","type":"stable","version":"0.12.0"}]` | `[{"url":"https://github.com/mailhog/MailHog/releases/tag/v1.0.1","date":"2020-08-11T18:04:41Z","type":"stable","version":"v1.0.1"},{"url":"https://github.com/mailhog/MailHog/releases/tag/v1.0.0","date":"2017-04-16T23:36:18Z","type":"stable","version":"v1.0.0"},{"url":"https://github.com/mailhog/MailHog/releases/tag/v0.2.1","date":"2016-09-04T18:31:48Z","type":"stable","version":"v0.2.1"},{"url":"https://github.com/mailhog/MailHog/releases/tag/v0.2.0","date":"2016-03-20T17:23:21Z","type":"stable","version":"v0.2.0"},{"url":"https://github.com/mailhog/MailHog/releases/tag/v0.1.9","date":"2016-03-13T19:24:01Z","type":"stable","version":"v0.1.9"},{"url":"https://github.com/mailhog/MailHog/releases/tag/v0.1.8","date":"2015-10-06T20:29:59Z","type":"stable","version":"v0.1.8"},{"url":"https://github.com/mailhog/MailHog/releases/tag/v0.1.7","date":"2015-05-20T20:03:57Z","type":"stable","version":"v0.1.7"},{"url":"https://github.com/mailhog/MailHog/releases/tag/v0.1.6","date":"2015-03-14T10:01:38Z","type":"stable","version":"v0.1.6"},{"url":"https://github.com/mailhog/MailHog/releases/tag/v0.1.5","date":"2015-02-12T21:30:55Z","type":"stable","version":"v0.1.5"},{"url":"https://github.com/mailhog/MailHog/releases/tag/v0.1.4","date":"2015-02-12T20:57:47Z","type":"stable","version":"v0.1.4"},{"url":"https://github.com/mailhog/MailHog/releases/tag/v0.1.3","date":"2015-01-08T22:36:13Z","type":"stable","version":"v0.1.3"},{"url":"https://github.com/mailhog/MailHog/releases/tag/v0.1.2","date":"2015-01-08T21:17:03Z","type":"stable","version":"v0.1.2"},{"url":"https://github.com/mailhog/MailHog/releases/tag/v0.1.1","date":"2015-01-04T12:54:33Z","type":"stable","version":"v0.1.1"},{"url":"https://github.com/mailhog/MailHog/releases/tag/v0.1.0","date":"2014-12-27T13:50:55Z","type":"stable","version":"v0.1.0"},{"url":"https://github.com/mailhog/MailHog/releases/tag/0.09","date":"2014-12-24T13:40:49Z","type":"prerelease","version":"0.09"},{"url":"https://github.com/mailhog/MailHog/releases/tag/0.08","date":"2014-12-21T09:34:14Z","type":"prerelease","version":"0.08"},{"url":"https://github.com/mailhog/MailHog/releases/tag/0.07","date":"2014-11-18T08:10:22Z","type":"prerelease","version":"0.07"},{"url":"https://github.com/mailhog/MailHog/releases/tag/0.06","date":"2014-11-13T18:23:01Z","type":"prerelease","version":"0.06"},{"url":"https://github.com/mailhog/MailHog/releases/tag/0.05","date":"2014-11-01T22:51:22Z","type":"prerelease","version":"0.05"},{"url":"https://github.com/mailhog/MailHog/releases/tag/0.04","date":"2014-10-29T18:53:09Z","type":"prerelease","version":"0.04"}]` |
| security.scorecard | 4.6 | 2.6 |
| security.vulnerabilities | `{"count":1,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=maildev&per_page=100","last_12m":0,"max_severity":"CRITICAL"}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Fmailhog%2FMailHog&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (Email Testing Dev)

| Capability | Maildev | MailHog |
|---|:--:|:--:|
| **Capabilities** |  |  |
| API assertions | - | ✓ |
| Rendering preview | - | ✓ |
| Spam score check | - | ✗ |
| Blocklist deliverability check | - | ✗ |
| SMS testing | - | ✗ |
| Production sending addon | - | ✓ |
| Ci cd integration | - | ✗ |
| Multi user inboxes | - | ✓ |
| Open source | - | ✓ |

*Source: Vioscale. Generated 2026-09-01T17:34:34.882Z. "-" = undocumented, not absent.*