Quicksy
Quicksy is a free Jabber/XMPP messaging app for Android and iOS that uses phone numbers for registration and contact discovery.
What Quicksy is
Quicksy is a free Jabber/XMPP messaging app for Android and iOS that uses phone numbers for registration and contact discovery. It suggests people by matching numbers from an Android address book with Quicksy users and Jabber/XMPP users listed in its Directory. Quicksy users can communicate with accounts on any publicly federating Jabber/XMPP server, and a user can be found by adding [email protected] to a contact list. The interface stays close to Conversations and Monal, helping users move from those apps without relearning the layout. Source code is available on Codeberg for Android and GitHub for iOS. Quicksy stores account details, keeps offline messages until delivery, retains message archives by default, and stores shared files for recipients. It says backups are encrypted and IP addresses are not stored, while recommending OMEMO when possible. Directory registration costs 4.99 Euro once, waived for paying conversations.im hosting customers.
Good
- Free app for Android and iOS
- Automatic contact suggestions from phone numbers
- Communicates with publicly federating XMPP servers
- Source code available for both platforms
- Backups are encrypted and IP addresses are not stored
Watch out
- Address-book numbers are periodically uploaded for matching
- Message archives are kept by default
- Shared files remain stored for recipients
- Directory listing costs 4.99 Euro once
Who it suits
Quicksy suits Android and iOS users who want phone-number signup with XMPP federation. It also fits people moving from Conversations or Monal and those who want optional OMEMO encryption.
Verdict
Quicksy combines phone-based discovery with Jabber/XMPP federation and familiar interfaces for Conversations or Monal users. Its data-retention practices and centralized Directory are important considerations alongside optional OMEMO encryption.
Plans and prices
From Quicksy's own pricing page, checked 11 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Quicksy app | Free | Free for users |
| Quicksy Directory registration | — | One-time registration fee; waived for paying customers of the conversations.im hosting service · 4.99 Euro |
The facts
Each one read from Quicksy's own pages, with the date it was checked.
What it does
- Address book handling
- Quicksy periodically uploads phone numbers from the Android address book for matching, but says it does not keep a copy of the full address book.checked 11 Oct 2026
- Commercial support
- Commercial support for running the Quicksy Server is available by contacting Daniel Gultsch.checked 11 Oct 2026
- Contact discovery
- Quicksy suggests contacts using phone numbers in the user's address book, matching Quicksy users and Jabber/XMPP users listed in the Quicksy Directory.checked 11 Oct 2026
- Directory fee
- People can list their Jabber ID and phone number in the Quicksy Directory for a one-time registration fee of 4.99 Euro, waived for paying conversations.im hosting customers.checked 11 Oct 2026
- Directory lookup
- A Quicksy user can be discovered by others who add [email protected] to their contact list.checked 11 Oct 2026
- Federation
- Quicksy users can communicate with users on any publicly federating Jabber/XMPP server.checked 11 Oct 2026
- Messages and files
- Offline messages are stored until delivery, message archives are kept by default, and shared files are stored for recipients to retrieve.checked 11 Oct 2026
- Migration
- The interface stays close to Conversations and Monal so users can migrate without relearning the app.checked 11 Oct 2026
- Open source
- The source code is available on Codeberg for Android and GitHub for iOS.checked 11 Oct 2026
- Product
- Quicksy is a Jabber/XMPP messaging app with phone-number sign-up and automatic contact discovery.checked 11 Oct 2026
- Security
- Quicksy says backups are encrypted, does not store IP addresses, and advises users to use OMEMO encryption when possible.checked 11 Oct 2026
- Server transparency
- Quicksy describes its Directory server as centralized, says there is no mechanism guaranteeing it runs the published code, and makes the server source available on Codeberg.checked 11 Oct 2026
- Stored account data
- Quicksy stores the username, which is the phone number, a password hash, account creation date, and last login.checked 11 Oct 2026
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