Search that actually works
Grouped results across names, emails, and numbers — with the matched text highlighted as you type.
Contact management, done right
Your contacts. Organised, synced, and always with you.
One address book that stays current on every device, every app, and every person you share with.
Everything your contacts need
From first sync to last export, Kontax handles it.
Labels that organise
A proper label registry — filter, group, and keep your tags in sync across every connected device.
Sync everywhere
Open CardDAV keeps you live with Google, Outlook, and iCloud — no proprietary client to install.
Share with family or team
Shared address books stay current for everyone, with live edits the whole group sees instantly.
Your public card
Claim a clean /u/username page and let anyone save your details with a one-tap vCard.
Developer API
A clean REST API at api.getkontax.com to build, automate, and integrate on your own terms.