# Maildev vs Testmail.app

**Leader by Vioscale score:** Testmail.app

| Attribute | Maildev | Testmail.app |
|---|---|---|
| **Vioscale score** | 63.8 (24% (low)) | 82.2 (42% (low)) |
| activity.commits_last_30d | 24 | - |
| adoption.dependent_repos | 313 | - |
| adoption.github_stars | 6,032 | - |
| deployment.options | `{"self_hosted":true}` | `{"cloud":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. | Provides temporary, addressable mailboxes and APIs enabling developers to capture and verify emails in automated test workflows and CI/CD pipelines without contacting real users. |
| integrations.count | - | 3 |
| integrations.list | - | `[{"name":"Microsoft Entra ID"},{"name":"Okta"},{"name":"OneLogin"}]` |
| language.primary | TypeScript | - |
| license.spdx | MIT | - |
| market.availability | - | `{"hqCountry":"CA","primaryMarkets":["US","CA"],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"web":true}` | `{"web":true}` |
| pricing | `{"type":"free","summary":"Free & open source (MIT)","freeTier":true,"sourceUrl":"https://maildev.github.io/maildev/","retrievedAt":"2026-08-20T16:30:07.523Z"}` | `{"type":"subscription","plans":[{"free":true,"name":"Free","summary":"Free forever","features":["100 emails/month","Unlimited users, email addresses, and mailboxes"],"components":[{"kind":"fixed","amount":0,"period":"month","currency":"USD"}],"description":"For side projects","contactSales":false,"includedLimits":{"emails_per_month":"100"}},{"free":false,"name":"Essential","summary":"$12/month or $9/month billed annually","features":["10,000 emails/month","Full API access"],"components":[{"kind":"fixed","amount":12,"period":"month","currency":"USD"}],"description":"For small projects","contactSales":false,"includedLimits":{"emails_per_month":"10,000"}},{"free":false,"name":"Pro","summary":"$39/month or $29/month billed annually","features":["50,000 emails/month","Unlimited custom namespaces","Visual email viewer","Priority support"],"components":[{"kind":"fixed","amount":39,"period":"month","currency":"USD"}],"description":"Most popular","contactSales":false,"includedLimits":{"emails_per_month":"50,000"}},{"free":false,"name":"Enterprise","summary":"$129/month or $89/month billed annually","features":["1,000,000 emails/month","SSO with SAML 2.0 or OIDC","SCIM support","Enterprise invoicing","99.99% uptime SLA"],"components":[{"kind":"fixed","amount":129,"period":"month","currency":"USD"}],"description":"For power users","contactSales":false,"includedLimits":{"emails_per_month":"1,000,000"}},{"free":false,"name":"Unlimited","summary":"$299/month or $269/month billed annually","features":["10,000,000 emails/month","All Enterprise features","Unlimited custom domains","Custom contracts with enterprise compliance support"],"components":[{"kind":"fixed","amount":299,"period":"month","currency":"USD"}],"description":"Best of everything","contactSales":false,"includedLimits":{"emails_per_month":"10,000,000"}}],"summary":"From free to $299/month. Free tier with 100 emails/month. 14-day trial.","currency":"USD","freeTier":true,"sourceUrl":"https://testmail.app/pricing/","retrievedAt":"2026-08-18T22:37:35.186Z","freeTrialDays":14,"startingPrice":{"amount":12,"period":"month","currency":"USD"},"billingPeriods":["month","year"]}` |
| pricing.free_tier | yes | yes |
| pricing.model | commercial | freemium |
| pricing.price_level | free | low |
| pricing.starting_price | - | `{"amount":12,"currency":"USD"}` |
| pricing.transparent | yes | yes |
| release.cadence_days | 46 | - |
| 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"}]` | - |
| reliability.sla_pct | - | 99.99 |
| reliability.status_page | - | yes |
| security.gdpr | - | yes |
| security.scorecard | 4.6 | - |
| 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"}` | - |

## Capabilities (Email Testing Dev)

| Capability | Maildev | Testmail.app |
|---|:--:|:--:|
| **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 2026-09-01T15:12:18.720Z. "-" = undocumented, not absent.*