Fizzle Client / Use cases / private-email-client-with-tracking
Privacy & visible tracking
A private email client. With tracking.
End-to-end encrypted between Fizzle inboxes. Send tracking that's visible to the recipient too. The point is information, not surveillance — so both sides can see what was opened, when, and by whom.
Subject: contract draft, v3
This conversation uses end-to-end encryption. Neither inbox can be scanned by intermediaries, and message bodies are stored encrypted on disk.
On encryption
Between Fizzle inboxes, the wire is quiet.
When both people in a thread use Fizzle, the whole conversation is end-to-end encrypted. Keys are generated on-device and rotated weekly. Message bodies are stored encrypted on disk, so even if a laptop is lost, the contents stay closed.
- XChaCha20-Poly1305 for messages, X25519 for key exchange.
- Forward secrecy on every thread, even old ones.
- The Fizzle server can't read your mail, and neither can we.
On tracking
Knowing isn't the same as spying.
Open and link tracking is useful — you want to know if your contract draft was actually read. But traditional tracking pixels exist only for the sender. Fizzle shows the same data to the recipient. They see exactly what you see, and they can turn it off on their end if they want to.
- Recipient receipt shows every open and click, both directions.
- One-click block on incoming tracker pixels and link wrappers.
- No third-party analytics, no Mixpanel, no Segment.
Who this is for
People whose email is also their paper trail.
Consultants. Lawyers. Founders mid-fundraise. Operations leads negotiating with vendors. Anyone whose work depends on knowing whether a message was read, without trading that knowledge for surveillance.
Early access
Send the next message and actually know it was read.
Private beta. End-to-end encrypted by default between Fizzle inboxes. No surveillance pixels.