Mail Blog
News, engineering insights, and privacy updates from the Aster team.
How Aster encrypts your email
A complete, honest look at how Aster encrypts your email — from key derivation and post-quantum protection to the metadata we store in plaintext and why.
Why our storage costs so little
10 GB free and low upgrade prices. Here's the full picture on how we keep storage affordable - the infrastructure decisions, the trade-offs we made, and why this model holds up long-term.
Is Aster Safe If It's Based in the US?
Aster is a US company with servers in Germany. Here's exactly what US law can and can't compel us to hand over - and why client-side encryption means even a valid court order can't get them your emails.
Sustainability Commitments
No venture capital. No advertising. No exit strategy. How Aster is funded, how we're structured, and why we're committed to staying independent. We wrote this to be held against us.
Aster is getting a new look!
We refreshed the Aster Mail logo and visual identity. Here's what changed, what we kept, and the thinking behind every decision in the updated design.
How our warrant canary and transparency report work
What our warrant canary actually proves, what shows up in our transparency report, and how to independently verify both. A practical guide to the legal protections behind Aster Mail.