What is CallChat ZERO?
CallChat ZERO is a Matrix-compatible sovereign messenger using callchat.org as the public front door and matrix.callchat.org as the homeserver API.
Questions and answers
CallChat FAQ.
Fast answers for users, admins, businesses, researchers, and self-hosted operators reviewing CallChat ZERO.
2
MVP domains: callchat.org and matrix.callchat.org.
Free
Standard Matrix-compatible secure messaging.
$5
Planned normal user monthly Shield price.
$55
Planned business and self-hosted monthly pricing.
FAQ
Can I use Element?
Yes. Install Element from official app stores or desktop downloads, choose a custom homeserver, and try callchat.org first.
What if callchat.org does not work in my Matrix client?
Use matrix.callchat.org as the fallback homeserver address.
Is normal chat free?
Yes. Standard Matrix-compatible secure messaging remains free.
What is CallChat Shield?
CallChat Shield is the optional premium ZMath layer for protected files, attachments, and vault notes.
What is a .zme1 file?
A .zme1 file is the planned CallChat Shield encrypted container for selected files or vault notes.
Can Element decrypt Shield files?
Element can download the .zme1 file, but premium Shield decryption requires compatible CallChat tooling. Normal chat stays usable.
Is the CallChat Android app live?
Not yet. The download page says APK coming soon until a real APK exists.
What is Zero Bot?
Zero Bot is the planned optional AI assistant @zero:callchat.org for summaries, research mode, Shield help, and admin status summaries.
Will the bot read encrypted rooms?
Not by default. Bot access should be opt-in, consent-based, and no-memory by default.
How much does ZMath cost?
Planned pricing is USD $5/month for normal users, USD $55/month for business use up to 10 users, and USD $55/month for one approved self-hosted ZMath deployment.
Does CallChat claim quantum encryption?
No. The safe wording is PQC-ready roadmap and optional future post-quantum envelope experiments after review.
Can admins recover Shield files?
Admins cannot recover Shield files by default if users lose the required password and pattern image.
Is public registration open?
The MVP plan keeps registration invite-only or admin-created until abuse controls, backups, moderation, and legal pages are ready.
Can CallChat be self-hosted?
The plan includes a self-hosted ZMath license path for approved deployments while keeping private implementation code protected.
Need the full picture?
Read the online guide or download the PDF.
The guide explains user setup, premium Shield, Zero Bot, admin launch safety, billing, and self-hosted direction.