Top 6: Business VoIP services for Eastern Europe

Google Voice is a telephone service that provides call forwarding and voicemail services, voice and text messaging as well as international call termination for Google Account owners and for G Suite customers.

Viber is a mobile app that provides free international calls and text messages to other Viber users using 3G or Wi-Fi. Uses your existing contact list - check out which of your phone contacts and friends is already on Viber so that you can call and text them for free.

IP telephony service + virtual PBX. Provides free incoming landline number in one of 70 countries worldwide. PBX features include extension numbers, IVR system, call transfer, call interception, call forwarding to mobile phones, website click-to-call, voicemail, fax reception, answering machine, call waiting and call statistics.

Free calls to Rebtel users and cheap international calling to everyone else – Use WiFi, 3G or local minutes to make calls. Call abroad at some of the world's lowest rates. Free calls and texts to other Rebtel users. No commitment - your first call is free

Suite of business telephony services, including a virtual PBX, multi-channel numbers, toll-free numbers, and redirection to Telegram.

Global IP telephony and virtual (DID) number service for call centers and rapidly growing teams. Reliable routing, instant DID number activation, and affordable voice channels for incoming, outgoing, and mixed communications.