Instead of ShadowPBX
ShadowPBX alternatives
Apps that do what ShadowPBX does, from the business phone systems list, the ones you can start free with first.
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sipXcom
Free plan APILinuxSelf-hosted - 3
FusionPBX
Free plan APILinuxSelf-hosted+1 - 4
VoIP Business Enterprise
Free plan AndroidExtensioniPhone+3 - 5
Incredible PBX
Free plan LinuxMacSelf-hosted+2 - 6
MikoPBX
Free plan APILinuxSelf-hosted+1 - 7
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Palephone
Free plan AndroidAPILinux+3 - 9
Phonebooth
Free plan AndroidiPhoneMac+2 - 10
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OPBX
Free plan APILinuxSelf-hosted+1 - 14
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Thirdlane Business Communications Platform
by Thirdlane Business Communications PlatformFree trial AndroidAPIiPhone+4 - 21
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AlwaysIP Cloud Phone System
Free trial AndroidExtensioniPhone+3 - 23
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