thunderbird/thunderbird-android
Thunderbird for Android – Open Source Email App for Android (fka K-9 Mail) observed · 2026-08-28
Health v2 · maintenance only
98/100
- Activity 99
- Release rhythm 97
- Longevity 100
How is this computed?
round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10) — computed 2026-09-02. Adoption (stars, forks) is never an input.
- gap_med: 0
- age_days: 5689
- days_rel: 22
- days_push: 7
- n_releases_24m: 50
Adoption not part of the score
13923 stars · 2790 forks observed · 2026-08-28
What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded
Thunderbird for Android is a free, open-source, privacy-focused email client for Android, formerly known as K-9 Mail and now part of the Mozilla Thunderbird project. It supports multiple accounts, a unified inbox, and OpenPGP end-to-end email encryption via OpenKeychain.
Use cases
- manage multiple email accounts on android
- unified inbox for all my email
- open-source email app without ads or tracking
- send encrypted email with openpgp on android
- replace gmail app with a privacy-focused client
- k-9 mail successor app
- read work and personal email in one app
When to choose
- you want a free, ad-free, open-source email app on Android
- you need to manage multiple accounts with a unified inbox
- you want OpenPGP end-to-end encryption support
- you prefer software backed by Mozilla and a large community
When to avoid
- you need an iOS email client (Thunderbird for iOS is still in development)
- you want a heavily integrated commercial suite with calendar and contacts sync out of the box
- you need desktop email management
Facets
application · maturity active
email security cryptography email privacy developer-tools messaging-platforms email-client openpgp k9-mail unified-inbox mozilla open-source android
6 sources
- readme: https://github.com/thunderbird/thunderbird-android · fetched 2026-08-28 · 740b4fccb142
- homepage: https://thunderbird.net/mobile · fetched 2026-08-29 · 7c351fa6a445
- site_page: https://www.thunderbird.net/en-US/about · fetched 2026-08-29 · 08f27bf97907
- site_page: https://www.thunderbird.net/en-US/about/mission-statement · fetched 2026-08-29 · cc0f9a012bcb
- site_page: https://blog.thunderbird.net/ · fetched 2026-08-29 · 0374b68373ab
- site_page: https://www.thunderbird.net/en-US/thunderbird/releases · fetched 2026-08-29 · 95054ccc77ab
Member repositories
| Repository | Role | Health v2 |
|---|---|---|
| thunderbird/thunderbird-android | main | 98 |
For agents
markdown · JSON · MCP: product_card(name="thunderbird/thunderbird-android")
Data as of 2026-08-30T08:39:29.467469+00:00 · Report a problem