CZCallChat ZEROPDF guide

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CallChat ZERO guide.

A concise manual for users, admins, business reviewers, and self-hosted operators. The downloadable PDF is generated from safe public planning content and does not include secrets or proprietary encryption internals.

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01 overview

What CallChat is

CallChat ZERO is a sovereign messenger built around Matrix compatibility. The public domain is callchat.org, and the Matrix homeserver API is matrix.callchat.org.

Users can start with Element immediately, while the CallChat Android app path, CallChat Shield, and Zero Bot are developed behind careful safety boundaries.

02 connect

How users connect

  1. Install Element. Use official app stores, desktop downloads, or the official Element website.
  2. Choose custom homeserver. Try callchat.org first.
  3. Use fallback if needed. Enter matrix.callchat.org if discovery is not available.
  4. Sign in when invited. Registration should stay invite-only during MVP testing.

03 shield

CallChat Shield / ZMath

Shield is the optional premium layer for protected files, attachments, and vault notes. The planned `.zme1` container is encrypted locally before upload, so plaintext is not uploaded by default.

Portable mode Exclusive mode No plaintext upload Element fallback

04 zero bot

Optional AI helper

Zero Bot is planned as @zero:callchat.org. It should be consent-based, no-memory by default, and should not read encrypted rooms unless users explicitly enable or bridge content.

Planned commands include !zero help, !zero summary, !zero decisions, !zero tasks, !zero explain-shield, and !zero server-status.

05 pricing

Planned premium pricing

$5

Normal users per month for ZMath encryption and vault features.

$55

Business per month for up to 10 users.

$55

Self-hosted ZMath license per month for one approved deployment.

Free

Standard Matrix-compatible secure messaging.

06 admin

Launch safety

Before real users, admins need backups, rollback, TLS, registration policy, abuse reporting, moderation, data retention, and incident response reviewed.

Do not change Synapse server_name after launch. For CallChat the planned value is callchat.org.

07 self-hosted

Self-hosted direction

Self-hosted CallChat-compatible deployments can use Matrix-compatible infrastructure. The ZMath/Shield self-hosted license is planned separately so private implementation code remains protected.

08 privacy

Privacy baseline

Support should never ask for passwords, pattern images, private keys, Matrix recovery phrases, or Shield internals. The AI bot should not store private room history by default or train silently on rooms.

09 FAQ

Short answers

Can I use Element?
Yes, use official Element clients with a custom homeserver.

Is the APK live?
No, the download page will only show a real APK when it exists.

Is Shield required?
No, normal Matrix chat remains free.

Does CallChat claim quantum encryption?
No, the serious roadmap is PQC-ready research after review.