PulseGatePost-LLM software, agents & workflows market (since 2022)
Coverage
168,991

Apps indexed

 

Freshness
18 min ago

Last update

 

Cadence
1,528/day

7-day average

Indexed today: 1,153

PulseGate

Market catalog for public software products, models, infra, and workflow tools.

Software is shipping faster than ever, and a growing share of it lives outside the official app stores. PulseGate is a free public catalog — built for builders, analysts, and everyday users.

Platform

  • All Apps
  • Categories
  • Industry Updates
  • Data Sources
  • Coverage Rules
  • Glossary
  • Embed Widget

Support

  • Help Center
  • Submit a Project
  • Report an Issue

Company

  • About
  • Press & Data
  • Contact
  • Platform Status

Legal

  • Privacy
  • Terms
  • Disclaimer

© 2026 PulseGate. Operated by Dymaxio s.r.o., Prague, Czech Republic.·

All systems operational
PulseGate
KMK-9 Mail logo
K-9 Mail
Visit ↗
  1. Home/
  2. Communication & Collaboration/
  3. K-9 Mail
←Back to results
KMK-9 Mail logo

K-9 Mail

k9mail.app·Communication & Collaboration

K-9 Mail is an open source email client for Android designed to handle large volumes of email efficiently. It supports multiple accounts, push IMAP, PGP encryption, unified inbox, and customizable notifications. Ideal for users who want privacy, advanced features, and control over their email experience.

Open SourceApache-2.0
WebAndroid
K
K-9 Mail preview
Visit k9mail.app↗
⭐13.7k
stars
🍴2.8k
forks
✓9
features
📅2008
since

Overview

9 features

In the Communication & Collaboration space, K-9 Mail takes a focused approach. It helps users efficiently manage and organize large volumes of email on Android devices. K-9 Mail is an open-source project aimed at android users seeking a robust open source email client. The project is open source (Apache-2.0). The product ships for the web and Android.

Mozilla Thunderbird builds and maintains K-9 Mail, and the product first shipped in 2008. The project is developed in the open on GitHub with 13.7k stars and 641 commits in the last 90 days. Across PulseGate's embedding index, K-9 Mail has few near neighbours, marking it as relatively distinct. Among its 9 catalogued features are multiple accounts, Push IMAP support, and PGP encryption.

  • ✓Multiple accounts
  • ✓Push IMAP support
  • ✓PGP encryption
  • ✓Unified inbox
  • ✓Dark mode
  • ✓Custom notifications
  • ✓Attachment saving
  • ✓Message flagging
  • ✓Keyboard shortcuts

Tags

open-source-emailandroid-mail-clientpgp-supportunified-inbox

Built with & integrations

Runs on
BrowserAndroid

Trust & compliance

LicenseApache-2.0
Verified signals
✓ HTTPS✓ Privacy Policy✓ Open Source✓ Free tier✓ GitHub · ★ 13.7k✓ Active maintenance✓ Store-verified publisher
Legal
Privacy Policy →

Recent events

Latest indexed changes and source events

  1. IndexedJun 29, 2:29 PM

    K-9 Mail discovered by the PulseGate indexer

    Source: PulseGate indexerOpen ↗

Frequently asked questions about K-9 Mail

What is K-9 Mail?
K-9 Mail helps users efficiently manage and organize large volumes of email on Android devices. It is catalogued under Communication & Collaboration on PulseGate.
Who should use K-9 Mail?
K-9 Mail is an open-source project built for android users seeking a robust open source email client.
Does K-9 Mail have a free plan?
Yes — K-9 Mail is open source under the Apache-2.0 license and free to use.
What platforms does K-9 Mail run on?
K-9 Mail runs on the web and Android.
Is K-9 Mail still active?
PulseGate's automated liveness checks currently classify K-9 Mail as active. The GitHub repository shows 641 commits in the last 90 days.
What tools are similar to K-9 Mail?
Similar tools tracked by PulseGate include MailKite, NeoMail, and Neat Mail.MailKiteNeoMailNeat Mail
Who develops K-9 Mail?
K-9 Mail is developed by Mozilla Thunderbird.
How long has K-9 Mail been around?
K-9 Mail first shipped in 2008.

At a glance

Pricing
Open Source
Platforms
Mobile · Web
Languages
English
Open source
Yes · ★ 13.7k
License
Apache-2.0
First seen
Dec 12, 2024
Activity
🟢 Active
Status
🟢 Active
Built for
Android users seeking a robust open source email client
Model
Open source
Solves
Helps users efficiently manage and organize large volumes of email on Android devices.

Developer

Mozilla Thunderbird
Community-driven
↗ GitHub

Open source

View on GitHub →
⭐ Stars
13,654
🍴 Forks
2,758
Open issues
1,032
Last commit
2w ago
Commits 90d
641
Contributors
440
Authorship
Community-driven
Default branch
main
Latest release
K9MAIL_20_0 · 3w ago

PulseGate index

Confidence
High · 96
Indexed
Jun 29, 2026
Lifecycle
Alive
Activity
Active
First seen
Dec 2024
Last seen
2w ago
Freshness
Unknown
Identity audit (9)
Entity ID
cmqzbej780g893gxztx6rbdtb
Slug
k-9-mail-k9mail-app
Verification state
Indexed for public listing
Claim / listing state
Unclaimed · listed: yes
Index status
Included in index
Latest evidence snapshot
Jun 29, 2026
Timeline basis
Indexed-at chronology (no inferred launch/funding milestones).
Last updated
Jun 29, 2026
Canonical URL
https://k9mail.app/

Similar apps

Other apps tracked under the same category.

  • MailKite
    mailkite.dev
  • NeoMail
    neomail.be
  • Neat Mail
    microsoft.com
  • ElectronMail
    flathub.org
  • Mail •
    microsoft.com
  • Digital Office PKG
    google.com