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Delta Chat is a decentralized and secure messenger app

Screenshot of delta.chat captured 2026-07-20
Page preview · captured 2026-07-20

Resurfaced independently across 8 calendar years, with breakout response in 2 of them.

submissions
15
submitters
14
observed span
2017–2025
peak thread · 203 comments
309 pts
latest 20+ return · 2025-06-21
309 pts

Submission timeline

2007–2026

One slot for every year since HN launched. Height is that year's peak points; orange marks a 100+ point or 50+ comment breakout. Select a bar to open its strongest thread.

First comments on top threads

HN comment order

Note that while it might be decentralized and "secure", it is not anonymizing as IMAP + SMTP are far from anonymous. Email is a legacy system that was never designed with privacy or anonymity in mind. This is useful if you want to keep the content of your messages secure, but if you need to keep your identity, social graph and the fact that you conversed with certain people obfuscated, I don't think Delta Chat via email is a good…

The fact that Delta Chat is catching on is a sad reflection on the state of the IM tools and protocols. Compare to most IM systems Delta Chat is: - easier to set up: you already have an email - equally private: most IM systems leak metadata anyways. A global observer can infer your peers. - compared to Signal, it does not snoop your phone number - decentralized - cheaper to run 1: managing mailservers is cheaper than managing both…

Previous discussion on HN: https://news.ycombinator.com/item?id=19216827

scblock·51-point thread·

This looks very good, but I'm not sure piggybacking on email is a good idea, considering the amount of metadata exposed by email headers that cannot be encrypted and are easy to monitor by listening in on SMTP port 25. Not to mention attachments which are likely not encrypted but just encoded in base64.

The first top-level comment from each of the four biggest threads, in HN’s own order. Excerpts are shortened; open a comment for full context.

Breakout years
2

100+ points or 50+ comments

Total points
619

reference only — not used in Hall rules or ranking

Total comments
366

reference only — not used in Hall rules or ranking

Every submission