# Mozilla Thunderbird vs Tuta

**Leader by vioscaleAI score:** Mozilla Thunderbird

| Attribute | Mozilla Thunderbird | Tuta |
|---|---|---|
| **vioscaleAI score** | 48.7 (44% (low)) | 38.6 (61% (medium)) |
| activity.commits_last_30d | 100 | 100 |
| adoption.dependent_repos | 0 | 5 |
| adoption.github_stars | 14,107 | 8,009 |
| content.faq | `[{"answer":"Thunderbird consolidates email, calendars, and contacts from multiple accounts into one interface. It runs on Windows, Mac, and Linux, is funded by user donations, and prioritizes privacy by never collecting personal data or serving advertisements. It is indexed under Email Clients.","source":"https://www.thunderbird.net","question":"What is Mozilla Thunderbird?","confidence":0.6},{"answer":"Mozilla Thunderbird offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.","source":"https://www.thunderbird.net","question":"Is Mozilla Thunderbird free?","confidence":0.6},{"answer":"Mozilla Thunderbird supports Windows, macOS and Linux. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://www.thunderbird.net","question":"What platforms does Mozilla Thunderbird support?","confidence":0.6},{"answer":"Yes. Mozilla Thunderbird is published under the Apache-2.0 licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/thunderbird/thunderbird-android","question":"Is Mozilla Thunderbird open source?","confidence":0.95}]` | `[{"answer":"A privacy-focused communication platform offering encrypted email, calendar, and contact management across web and mobile applications. Data is stored and processed in Germany under European privacy standards without advertising or tracking. It is indexed under Email Clients.","source":"https://tuta.com","question":"What is Tuta?","confidence":0.6},{"answer":"Tuta offers a free tier, so you can start without paying. Pricing changes often, so verify at source before relying on it.","source":"https://tuta.com","question":"Is Tuta free?","confidence":0.6},{"answer":"Tuta supports the web, Windows, macOS, Linux, iOS and Android. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://tuta.com","question":"What platforms does Tuta support?","confidence":0.6},{"answer":"Yes. Tuta can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://tuta.com","question":"Can Tuta be self-hosted?","confidence":0.6},{"answer":"We have independently confirmed GDPR for Tuta. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Tuta not holding them. Always confirm compliance directly before you rely on it.","source":"https://tuta.com/blog/apple-eu-dma-malicious-compliance","question":"What security certifications does Tuta have?","confidence":0.7},{"answer":"Yes. Tuta is published under the GPL-3.0 licence, a copyleft licence, so check its terms before embedding it in a closed-source product. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/tutao/tutanota","question":"Is Tuta open source?","confidence":0.95},{"answer":"Tuta is available worldwide. The vendor is headquartered in Germany.","source":"https://tuta.com","question":"Where is Tuta available?","confidence":0.75}]` |
| deployment.options | - | `{"cloud":true}` |
| description.long | Thunderbird consolidates email, calendars, and contacts from multiple accounts into one interface. It runs on Windows, Mac, and Linux, is funded by user donations, and prioritizes privacy by never collecting personal data or serving advertisements. | An email service that provides end-to-end encryption for messages, contacts, and calendar data across devices. |
| features.capabilities | `{"pricing_model":"free_open_source","deployment_model":"local_direct_imap_client","generative_ai_llm_email_drafting":false,"unified_multi_account_inbox_view":true,"universal_imap_smtp_exchange_support":true}` | `{"pricing_model":"freemium","pgp_end_to_end_encryption_support":true}` |
| integrations.count | - | 1 |
| integrations.list | - | `[{"name":"Gmail"},{"name":"Thunderbird"},{"name":"Nextcloud","native":true}]` |
| language.primary | Kotlin | TypeScript |
| license.spdx | Apache-2.0 | GPL-3.0 |
| market.availability | - | `{"hqCountry":"DE","primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"mac":true,"linux":true,"windows":true}` | `{"ios":true,"mac":true,"web":true,"linux":true,"android":true,"windows":true}` |
| pricing | `{"type":"free","summary":"Free, open-source. Free forever.","freeTier":true,"sourceUrl":"https://www.thunderbird.net","retrievedAt":"2026-08-21T12:42:28.376Z"}` | `{"type":"hybrid","freeTier":true,"sourceUrl":"https://tuta.com","retrievedAt":"2026-08-20T16:37:23.269Z"}` |
| pricing.free_tier | yes | yes |
| pricing.model | freemium | freemium |
| pricing.price_level | free | low |
| pricing.transparent | yes | - |
| release.history | `[{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_24_0","date":"2026-10-05T23:38:09Z","type":"stable","version":"THUNDERBIRD_24_0"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/K9MAIL_24_0","date":"2026-10-05T23:38:15Z","type":"stable","version":"K9MAIL_24_0"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_25_0b1","date":"2026-10-05T23:36:57Z","type":"prerelease","version":"THUNDERBIRD_25_0b1"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_23_1","date":"2026-09-22T05:59:49Z","type":"stable","version":"THUNDERBIRD_23_1"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/K9MAIL_23_1","date":"2026-09-22T05:59:50Z","type":"stable","version":"K9MAIL_23_1"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_24_0b2","date":"2026-09-14T18:09:35Z","type":"prerelease","version":"THUNDERBIRD_24_0b2"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_23_0","date":"2026-09-09T06:41:45Z","type":"stable","version":"THUNDERBIRD_23_0"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/K9MAIL_23_0","date":"2026-09-09T06:41:39Z","type":"stable","version":"K9MAIL_23_0"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_24_0b1","date":"2026-09-08T22:28:10Z","type":"prerelease","version":"THUNDERBIRD_24_0b1"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_22_0","date":"2026-08-11T03:59:18Z","type":"stable","version":"THUNDERBIRD_22_0"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/K9MAIL_22_0","date":"2026-08-11T03:59:18Z","type":"stable","version":"K9MAIL_22_0"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_23_0b1","date":"2026-08-10T22:13:14Z","type":"prerelease","version":"THUNDERBIRD_23_0b1"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_21_1","date":"2026-08-03T19:14:04Z","type":"stable","version":"THUNDERBIRD_21_1"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/K9MAIL_21_1","date":"2026-08-03T19:14:10Z","type":"stable","version":"K9MAIL_21_1"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_22_0b2","date":"2026-07-27T20:45:48Z","type":"prerelease","version":"THUNDERBIRD_22_0b2"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_21_0","date":"2026-07-20T21:30:00Z","type":"stable","version":"THUNDERBIRD_21_0"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/K9MAIL_21_0","date":"2026-07-20T21:29:55Z","type":"stable","version":"K9MAIL_21_0"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_22_0b1","date":"2026-07-20T23:20:30Z","type":"prerelease","version":"THUNDERBIRD_22_0b1"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_20_1","date":"2026-07-06T22:30:54Z","type":"stable","version":"THUNDERBIRD_20_1"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/K9MAIL_20_1","date":"2026-07-06T22:30:53Z","type":"stable","version":"K9MAIL_20_1"}]` | `[{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-release-361.261006.0","date":"2026-10-12T08:35:56Z","type":"stable","version":"tutanota-release-361.261006.0"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-ios-release-361.261006.0","date":"2026-10-12T08:35:29Z","type":"stable","version":"tutanota-ios-release-361.261006.0"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-desktop-release-361.261006.0","date":"2026-10-12T08:34:32Z","type":"stable","version":"tutanota-desktop-release-361.261006.0"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-android-release-361.261006.0","date":"2026-10-12T08:34:21Z","type":"stable","version":"tutanota-android-release-361.261006.0"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutamail-nextcloud-release-1.2.3612610060","date":"2026-10-06T15:18:12Z","type":"stable","version":"tutamail-nextcloud-release-1.2.3612610060"},{"url":"https://github.com/tutao/tutanota/releases/tag/tuta-drive-ios-release-361.261006.0","date":"2026-10-12T08:34:11Z","type":"stable","version":"tuta-drive-ios-release-361.261006.0"},{"url":"https://github.com/tutao/tutanota/releases/tag/tuta-drive-android-release-361.261006.0","date":"2026-10-12T08:34:07Z","type":"stable","version":"tuta-drive-android-release-361.261006.0"},{"url":"https://github.com/tutao/tutanota/releases/tag/tuta-calendar-ios-release-361.261006.0","date":"2026-10-12T08:34:04Z","type":"stable","version":"tuta-calendar-ios-release-361.261006.0"},{"url":"https://github.com/tutao/tutanota/releases/tag/tuta-calendar-android-release-361.261006.0","date":"2026-10-12T08:33:35Z","type":"stable","version":"tuta-calendar-android-release-361.261006.0"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-ios-release-361.260929.0","date":"2026-10-01T13:56:44Z","type":"stable","version":"tutanota-ios-release-361.260929.0"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-desktop-release-361.260929.0","date":"2026-10-01T13:57:20Z","type":"stable","version":"tutanota-desktop-release-361.260929.0"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-android-release-361.260929.0","date":"2026-10-01T13:57:07Z","type":"stable","version":"tutanota-android-release-361.260929.0"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutamail-nextcloud-release-1.1.3612609290","date":"2026-09-30T15:29:27Z","type":"stable","version":"tutamail-nextcloud-release-1.1.3612609290"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutamail-nextcloud-release-1.0.3612609290","date":"2026-09-30T09:43:46Z","type":"stable","version":"tutamail-nextcloud-release-1.0.3612609290"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutamail-nextcloud-release-1.0.0%2B361.260929.0","date":"2026-09-30T08:26:23Z","type":"stable","version":"tutamail-nextcloud-release-1.0.0+361.260929.0"},{"url":"https://github.com/tutao/tutanota/releases/tag/tuta-drive-ios-release-361.260929.0","date":"2026-10-01T13:57:37Z","type":"stable","version":"tuta-drive-ios-release-361.260929.0"},{"url":"https://github.com/tutao/tutanota/releases/tag/tuta-drive-ios-release-361.260928.1","date":"2026-10-01T13:58:40Z","type":"stable","version":"tuta-drive-ios-release-361.260928.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tuta-drive-android-release-361.260929.0","date":"2026-10-01T13:57:52Z","type":"stable","version":"tuta-drive-android-release-361.260929.0"},{"url":"https://github.com/tutao/tutanota/releases/tag/tuta-calendar-ios-release-361.260929.0","date":"2026-10-01T13:58:05Z","type":"stable","version":"tuta-calendar-ios-release-361.260929.0"},{"url":"https://github.com/tutao/tutanota/releases/tag/tuta-calendar-android-release-361.260929.0","date":"2026-10-01T13:58:24Z","type":"stable","version":"tuta-calendar-android-release-361.260929.0"}]` |
| security.gdpr | - | yes |
| security.scorecard | 7.2 | 5.6 |
| security.vulnerabilities | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=fdroid&package_name=com.fsck.k9&per_page=100","last_12m":0,"max_severity":null}` | `{"count":1,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40tutao%2Ftutanota-utils&per_page=100","last_12m":1,"max_severity":"LOW"}` |

## Capabilities (Email Clients)

| Capability | Mozilla Thunderbird | Tuta |
|---|:--:|:--:|
| **Capabilities** |  |  |
| Deployment model | Local direct imap client | - |
| Universal imap smtp exchange support | ✓ | - |
| Keyboard shortcut only navigation speed | - | - |
| Split inbox AI auto categorization | - | - |
| Read receipts and open tracking | - | - |
| Snooze and scheduled send later | - | - |
| Generative AI LLM email drafting | ✗ | - |
| Conversational chat layout view | - | - |
| Unified multi account inbox view | ✓ | - |
| Pgp end to end encryption support | - | ✓ |
| SOC2 type ii | - | - |
| ISO 27001 | - | - |
| Pricing model | Free open source | Freemium |

*Source: vioscaleAI. Generated 2026-10-16T20:51:13.543Z. "-" = undocumented, not absent.*