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Threema – Seriously secure messaging

Screenshot of threema.ch captured 2026-07-20
Page preview · captured 2026-07-20

Resurfaced independently across 4 calendar years, with breakout response in 2 of them.

submissions
4
submitters
4
observed span
2019–2024
peak thread · 92 comments
104 pts
latest 20+ return · 2021-01-21
83 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

Here's the obligatory reference to the source code not being fully open: https://threema.ch/en/faq/source_code Yes, they sent some source code for security review in 2015, but there is no guarantee that the binary you download is related to that source code at all. Nowadays I'd expect a secure messaging app to not just be open source, but also have reproducible builds (checked by third parties). It would be nice to have Binary Transparency too, so that people can check that they…

Benefits over signal: * Does not require a phone number * (related) more tractable on non-phone devices * Does not use GCM. * Interface is smoother (subjective) * Has 'work' mode allowing for enterprise use Drawbacks over signal: * Has a non-zero price, so uptake is embarrassingly low. Embarrassing for humanity that is. I've struggled to get well paid professionals to cough up the €4. There is some mental block beyond 'free', yet these same people decry WA's privacy changes…

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
191

reference only — not used in Hall rules or ranking

Total comments
168

reference only — not used in Hall rules or ranking

Every submission

DateTitle as submittedByPointsComments
2019-01-06Threema – Seriously secure messagingFirst breakout · Best threadoctosphere10492
2020-06-19Messenger that puts security and privacy firstvincent_s10
2021-01-21Threema – Secure and Private MessengerLatest 20+ point returndgudkov8376
2024-06-21Threema – The Secure Messenger for Individuals and Companiestgol30