Messages
One-to-one and group conversations with replies, read receipts and typing indicators.
Private · Invitation only
A private line for the people you actually work with.
ib2b is a closed messaging service. There is no public sign-up: a group administrator adds you, you confirm your phone number, and you’re in. Direct messages, groups, media and voice calls, with nothing sold and nothing tracked.
No public sign-upAccounts exist only by invitation.
No ads, no data salesWe deliver messages, nothing else.
Calls never recordedVoice goes device to device.
Access
Getting in
Four steps, and the first one isn’t yours to take. Only an administrator of a group can bring someone in.
An administrator invites you
They add your phone number to the group, or send you a one-tap invite link. Without this step the app has nowhere to put you.
Install the app
ib2b is on the App Store and Google Play. Installing it does not create an account.
Confirm your phone number
Enter the number your administrator has, and type the one-time code we text you. No password, nothing to remember.
Choose your name
Pick the name your group will see. You can change it later under Account.
What’s inside
Everything a small team needs. Nothing it doesn’t.
No feeds, no channels to discover, no strangers. Just the people in your groups.
Groups
Groups are managed by their administrators: who is in, who can invite, who leaves.
Photos, video, voice notes
Shared inside the chat and stored on our own servers behind expiring links.
Voice calls
Peer-to-peer between devices. We keep a call log, never the audio.
Invite links
Expiring, limited-use links for administrators. Joining always asks you to confirm first.
Safety controls
Block anyone. Report a user or a message and an administrator reviews it.
Privacy
Your data is yours. We just deliver it.
ib2b exists to move messages between the people you choose, not to profile you. We collect what the service needs to run, and you can erase it whenever you like.
Encrypted in transitEvery connection uses TLS, with short-lived rotating sign-in tokens.
Calls are peer-to-peerVoice travels directly between devices and is never recorded or stored.
Delete everything, any timeRemove your account in the app; all data is permanently erased within 30 days.
No ads, no data salesWe don’t sell or share your information. The details are in the privacy policy.
FAQ
Good to know
Can I sign up on my own?
No. ib2b is invitation-only. An administrator of a group has to add your phone number or send you an invite link. There is no waiting list and we don’t create accounts on request.
Do I need a phone number?
Yes. Your phone number is your account. You sign in with a one-time code sent to it by SMS, then choose the name your group sees. Any number that can receive SMS works.
I installed the app but can’t get in.
The app only opens for numbers an administrator has invited. Check that the number you entered is the one they have, or ask them to add it.
Are calls recorded?
Never. Calls are peer-to-peer between devices. We keep only a call log (who, when, how long) so your history and missed calls work.
How do I delete my account?
Open the app, go to Account, tap Delete Account and confirm. It is deactivated immediately and all data is permanently removed within 30 days. Full steps are on the account deletion page.
Which platforms are supported?
iPhone through the App Store and Android through Google Play. Invite links open directly in the app.