SIP softphone for Android, Windows and Linux.

Your business calls,
wherever you work.

Call over the Internet with your provider’s account on Android, Windows and Linux.

bitCaller is a free, full-featured softphone for small businesses, teams and people who work in more than one place. Connect it to your SIP provider or company PBX.

The browser phone is the quickest way to try bitCaller without installing anything. For the full range of features, choose the apps: Windows and Linux for everyday work on your computer, Android for your phone.

Try in your browser Download the app

12 app languages · No ads · No analytics

My numbers in bitCaller: reception, customer service and office.

One app, different working days

Keep your number in reach.

A small team

Answer the business line and pass a caller to the right person. With a supporting provider and account profile, extensions, DDI numbers and transfers bring your company’s phone service into bitCaller.

A remote desk

Use your company’s SIP account on a Linux computer or Android phone. Keep contacts and call history close to hand, whether your desk is at the office or at home.

A day away

Connect over Wi-Fi or mobile data while travelling. Use the account and number supplied by your provider, with its dialling rules and call rates.

Your provider, your account

Bring the SIP service
you already use.

Enter your SIP login, password and server, or open a setup code supplied by your provider.

bitCaller works with SIP providers and company PBXs. Use the settings supplied for your service; a provider profile can also configure the app for team features.

Set up a connection

The everyday calling tools

Dial a number, choose a contact or call back from history. Set Do not disturb when you need quiet, choose how to handle a second call and block unwanted numbers.

On Android, you can use phone contacts. On Linux, keep a local address book and import vCard or CSV files. The app interface is available in 12 languages.

For teams and company phone systems

Put your phone service to work.

These are capabilities of bitCaller with providers and account profiles that support them. Your provider or PBX administrator sets up the service behind them.

Several accounts, clear names

Use multiple accounts at the same time with a supporting profile. Name assigned DDI numbers so you can see whether a customer called Reception, Sales or another business line.

Extensions and transfers

Reach colleagues by extension. Transfer a call directly, or speak to the recipient before handing it over. Available options depend on the provider’s PBX configuration.

Recordings on your device

With a recording-enabled profile, save a call from its controls or choose automatic recording in Settings. Automatic recording starts off. Play, copy or delete recordings from call history.

Setup for a whole team

A provider’s startup QR code or link carries account settings for you to review. Managed accounts can keep the password hidden and include a recording policy set by the provider.

For SIP providers and PBX teams

Test your service
with bitCaller.

We welcome providers who want to check registration, incoming and outgoing calls, transfers and account setup with bitCaller. Tell us about your service and the features you would like to test.

otoTelefon (new tab) is one tested provider example. Results for another service need to be checked with that service; a profile or integration is agreed after testing.

Discuss a service test

Your call history
stays with you.

History and recordings are stored on your device. Read how the app handles account details, contacts and reports.

Next step

Download the app →Try in your browser →

Your business calls,wherever you work.