OpenNumber - Chat Without Saving Contacts
Open Number is a seamless utility app that lets you send messages across WhatsApp, Telegram, Signal and SMS — without needing to save the contact number first.
App highlights
Everything you need to message fast
Reach anyone quickly and securely without cluttering your phonebook.
Instant messaging
Message directly via WhatsApp, Telegram, Signal or SMS with just a tap.
Smart history
Automatically track recent numbers so you can resume conversations later.
Favorites list
Save your most frequent unsaved contacts into a custom favorites list.
Custom themes
Built-in Light, Dark and System themes to match your viewing preference.
A look inside
See the app in action
Recent Numbers
Favorites List
App Settings
Recent Numbers
Favorites List
App Settings
Build your own
Need a custom solution?
Loved Open Number? We can build a custom app tailored to your business. Talk to our team about your workflow and we'll turn your idea into reality.
Enterprise licensing
Want to white-label this app or roll it out across your organization? Let's talk.
Your privacy matters
Open Number operates primarily on your device and does not store your contacts or messages on external servers.