# Mozilla Thunderbird vs Tuta

| Attribute | Mozilla Thunderbird | Tuta |
|---|---|---|
| **Vioscale score** | 60.1 (27% (low)) | 40.8 (27% (low)) |
| activity.commits_last_30d | 100 | 100 |
| adoption.dependent_repos | 0 | 5 |
| adoption.github_stars | 13,921 | 7,872 |
| deployment.options | - | `{"cloud":true,"self_hosted":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. | 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. |
| 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}` | - |
| integrations.count | - | 2 |
| integrations.list | - | `[{"name":"Gmail"},{"name":"Thunderbird"}]` |
| 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_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/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_21_0b2","date":"2026-06-29T21:12:45Z","type":"prerelease","version":"THUNDERBIRD_21_0b2"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/K9MAIL_20_0","date":"2026-06-23T01:45:10Z","type":"stable","version":"K9MAIL_20_0"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_20_0","date":"2026-06-23T01:45:03Z","type":"stable","version":"THUNDERBIRD_20_0"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_21_0b1","date":"2026-06-22T17:24:23Z","type":"prerelease","version":"THUNDERBIRD_21_0b1"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_19_2","date":"2026-06-04T19:32:37Z","type":"stable","version":"THUNDERBIRD_19_2"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/K9MAIL_19_2","date":"2026-06-04T19:32:32Z","type":"stable","version":"K9MAIL_19_2"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_20_0b2","date":"2026-06-04T18:27:10Z","type":"prerelease","version":"THUNDERBIRD_20_0b2"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/THUNDERBIRD_19_1","date":"2026-06-03T22:11:56Z","type":"stable","version":"THUNDERBIRD_19_1"},{"url":"https://github.com/thunderbird/thunderbird-android/releases/tag/K9MAIL_19_1","date":"2026-06-03T22:11:55Z","type":"stable","version":"K9MAIL_19_1"}]` | `[{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-release-357.260824.1","date":"2026-08-25T11:26:11Z","type":"stable","version":"tutanota-release-357.260824.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-release-357.260818.1","date":"2026-08-24T10:16:11Z","type":"stable","version":"tutanota-release-357.260818.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-ios-release-357.260824.1","date":"2026-08-25T11:26:06Z","type":"stable","version":"tutanota-ios-release-357.260824.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-ios-release-357.260818.1","date":"2026-08-24T10:16:26Z","type":"stable","version":"tutanota-ios-release-357.260818.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-desktop-release-357.260824.1","date":"2026-08-25T11:25:53Z","type":"stable","version":"tutanota-desktop-release-357.260824.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-desktop-release-357.260818.1","date":"2026-08-24T10:15:45Z","type":"stable","version":"tutanota-desktop-release-357.260818.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-android-release-357.260824.1","date":"2026-08-25T11:25:47Z","type":"stable","version":"tutanota-android-release-357.260824.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-android-release-357.260818.1","date":"2026-08-24T10:16:43Z","type":"stable","version":"tutanota-android-release-357.260818.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tuta-drive-ios-release-357.260818.1","date":"2026-08-24T10:17:17Z","type":"stable","version":"tuta-drive-ios-release-357.260818.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tuta-calendar-ios-release-357.260824.1","date":"2026-08-25T11:24:48Z","type":"stable","version":"tuta-calendar-ios-release-357.260824.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tuta-calendar-ios-release-357.260818.1","date":"2026-08-24T10:17:28Z","type":"stable","version":"tuta-calendar-ios-release-357.260818.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tuta-calendar-android-release-357.260824.1","date":"2026-08-25T11:24:23Z","type":"stable","version":"tuta-calendar-android-release-357.260824.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tuta-calendar-android-release-357.260818.1","date":"2026-08-24T10:17:39Z","type":"stable","version":"tuta-calendar-android-release-357.260818.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-release-357.260812.1","date":"2026-08-13T10:49:54Z","type":"stable","version":"tutanota-release-357.260812.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-ios-release-357.260812.1","date":"2026-08-13T10:57:37Z","type":"stable","version":"tutanota-ios-release-357.260812.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-desktop-release-357.260812.1","date":"2026-08-13T10:52:04Z","type":"stable","version":"tutanota-desktop-release-357.260812.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-android-release-357.260812.1","date":"2026-08-13T10:54:06Z","type":"stable","version":"tutanota-android-release-357.260812.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-release-356.260806.1","date":"2026-08-07T07:51:21Z","type":"stable","version":"tutanota-release-356.260806.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-ios-release-356.260806.1","date":"2026-08-07T07:51:05Z","type":"stable","version":"tutanota-ios-release-356.260806.1"},{"url":"https://github.com/tutao/tutanota/releases/tag/tutanota-desktop-release-356.260806.1","date":"2026-08-07T07:51:13Z","type":"stable","version":"tutanota-desktop-release-356.260806.1"}]` |
| 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":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=npm&package_name=%40tutao%2Ftutanota-crypto&per_page=100","last_12m":0,"max_severity":null}` |

## 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 | - |

*Source: Vioscale. Generated 2026-09-01T16:38:24.262Z. "-" = undocumented, not absent.*