Show HN: Open-Source P2P Contacts App E2EE Signal | Alpha testers wanted

[marcoparisi]

Hi HN! We're building Meishi, a privacy-first contacts app where you control your data.

The problem: Your contacts live on Big Tech servers, get outdated, and you have zero control over who accesses them.

Our approach: - P2P sync with Signal Protocol (E2EE) - Auto-updates when contacts change info - Grant/revoke access with one tap - Zero data monetization

Open source: - Core P2P sync engine (AGPL v3) - iOS/Android clients (open source) - Server infrastructure remains proprietary

We're opening alpha waitlist (1,000 spots) with 1 year free Premium.

We're two GDPR-native founders (tech + design) solving our own frustration with centralized contacts. Here's our manifesto on data sovereignty vs. Big Tech control: https://github.com/Meishiapp/docs/blob/main/Meishi_Manifesto...

Would love feedback on the architecture and whether this resonates with you.