🔑
Your own key
Standard OpenPGP. Create a key in one step, or bring the one you already use with GnuPG or Kleopatra.
Free · Open source · Your own PGP key
Private communication you control.
Two apps built on the same idea: your messages belong to you and the people you write to. Encrypted with your own OpenPGP key, carried without anyone in the middle who can read them — and no account with us, ever.
Sealpost
An email client with OpenPGP built in. Sign, encrypt, decrypt and verify with any mail account — and with your own Sealpost Server, the same accounts, contacts and keys on every computer, in your browser and on your iPhone.
- Works with the email you have — Gmail, Outlook, iCloud, Fastmail, Proton Bridge, Zoho or any IMAP account, and with anyone who uses PGP.
- Keys handled for you: create or import, look up your contacts' keys online, see who can get encrypted mail as you type.
- One encrypted vault, every device. Your server only ever stores ciphertext — even it can't read your accounts or keys.
- Safe reading: no scripts in mail, tracking pixels blocked until you allow them.
💬 Chat
Seal Chat
Messages, photos, videos and files sent directly between computers over the Tor network. Every message is signed and encrypted with your own PGP key, and nothing is stored on anyone's server — because there isn't one.
- Truly peer-to-peer: each copy has its own Tor .onion address. No relay, no cloud, no account.
- Files up to 4 GB — photos show in the chat, audio and video play right there, broken transfers resume.
- Connect with a QR code, and check a 60-digit safety number to be sure nobody is in the middle.
- Messages wait in your outbox and go out by themselves when your contact comes online.
What every Seal PGP app promises
Different jobs, the same rules.
🚫
Nobody in the middle
No Seal PGP server sits between you and the people you talk to. Seal Chat has no server at all; Sealpost's is optional and yours.
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No accounts, no tracking
You never sign up with us, and nothing about you or your messages is collected. These pages use no cookies or outside services.
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Open source
Both are free software under the GPL-3.0, published on GitHub — read the code, build it yourself, check every release.
Which one do I need?
Use one or both: Sealpost for email with anyone, Seal Chat for private conversations with the people closest to you.
| Sealpost | Seal Chat | |
|---|---|---|
| What it is | An email client | A messenger |
| Who you can reach | Anyone with an email address (encrypted when they have a PGP key) | Other Seal Chat users |
| How it travels | Your normal mail provider (IMAP / SMTP) | Straight to their computer over Tor |
| Your own server | Optional — for sync, webmail and iPhone | Not needed (optional Seal Chat Web for your phone's browser) |
| Computers | Windows, macOS, Linux | Windows, macOS, Linux |
| Phones | iPhone and any browser, via Sealpost Web | Android app; any phone via Seal Chat Web |
| Best for | Encrypted email you can read on every device | Conversations that leave no trace on any server |
Questions
Are they really free?
Yes. Both are free and open source (GPL-3.0). There's no paid tier, no account and nothing to subscribe to.
Can I use the same PGP key in both?
Both use standard OpenPGP keys, so you can import a key you already have into either one. Many people prefer separate keys for email and chat — that works too.
Do the people I talk to need Seal PGP too?
For Seal Chat, yes — both of you run Seal Chat. For Sealpost, no: it's normal email, so you can write to anyone. Mail is encrypted when the recipient has a PGP key, from any PGP program.
Where do the downloads come from?
Every version of both apps is published on GitHub (Sealpost, Seal Chat). The download buttons on the product pages point straight there, with a SHA-256 checksum for each file.
Do I need my own website?
No. Both apps work on their own. A website of your own only adds extras: Sealpost Server syncs Sealpost between devices and gives you webmail; Seal Chat Web lets you chat from your phone's browser.