Viber is a free messaging and calling app that allows users to connect with friends and family worldwide.
Free with in-app purchases
Best Rebtel Alternatives ranked by AI · updated May 2025
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Rebtel is a voice-over-IP service for international calling with transparent pricing and good call quality.
Price: Varies based on usage
Top 6 Rebtel alternatives
Google Voice is a telecommunications service that provides call forwarding and voicemail services, voice and text messaging, as well as U.S. and...
Free with limited features, Paid plans available for additional features
KeepCalling is a communication service provider offering international calling, mobile recharges, and other telecommunication services.
Varies based on usage
Call2Friends is a web-based international calling service for people who want to call mobile and landline numbers without requiring the recipient to...
Pros
- Recipients can answer on ordinary mobile or landline numbers
- Browser-based calling requires no installed desktop app
- Supports international destinations that many app-only services do not
Cons
- Call quality and availability vary by destination and network
- Free calling is limited and subject to promotional restrictions
- Pay-as-you-go rates can exceed app-to-app calling
Freemium; paid calls use destination-based rates
Globfone is a web-based communication service that offers free online phone calls, messaging, and video conferencing.
Talk360 is an international calling app for reaching mobile and landline numbers worldwide. It uses prepaid credit and destination-based rates, while recipients...
Pros
- Can call ordinary mobile and landline numbers worldwide
- Recipients do not generally need an account or data connection
- Prepaid model suits occasional international callers
Cons
- Per-minute rates vary widely by destination and number type
- No broad free app-to-app calling community like WhatsApp
- Requires buying credit before calling
Pay-as-you-go; destination-based rates vary
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