18.0
Telnyx SIP Trunking connects business phone systems to the public telephone network through the internet.
Free planAndroidiOSWeb
Alternatives to D7 Networks
D7 Networks suits teams that need one API for global SMS, WhatsApp, Viber, number lookup and verification. It supports single or bulk SMS in any language, two-way messaging, inbound SMS, delivery reports and contact management. Its no-code WhatsApp chatbot handles customer service, appointments, feedback and lead qualification, with ChatGPT integration, buttons, flows, shared inboxes, templates and analytics. Number Lookup checks validity, reachability, country code and…
27.6
AndroidiOSWeb
37.5
Wazo Platform is an open source stack of telecom microservices for developers building programmable voice, video, messaging and presence services.
Free planAndroidiOSWeb
- 4
46elks
46elks is a telecom API for applications that send messages and make phone calls.
Free planWebAPI7.0From €3 a month - 5
Amazon Chime SDK PSTN Audio
Free planAndroidiOSWebAPI6.9Free plan - 6
Infobip Voice API
Infobip Voice API gives developers tools to add voice calls to mobile and web applications, including calls to landlines and mobile phones.
Free planAndroidiOSWebAPI6.9Free plan - 7
Plivo Voice API
Plivo Voice API lets developers add programmatic calling and interactive voice functions to web and mobile applications.
AndroidiOSWebAPI6.9From $1,000 a month - 8
Telnyx Voice API
Free planAndroidiOSWeb6.9From $500 a month - 9
CallFire API
CallFire API v2 is a REST API for connecting applications to CallFire telephony services.
Free planAPI6.5From $99 a month - 10
Aculab Cloud
Aculab Cloud provides APIs for businesses building applications for voice and video calls, messaging, and inbound or outbound fax.
AndroidiOSWebAPI6.4 - 11
FreeSWITCH
FreeSWITCH is an open-source framework for real-time voice and video communications.
Free planAPILinuxmacOSSelf-hosted6.4Free plan - 12
SIP.IO
SIP.IO is a programmable voice and cloud contact center platform for UCaaS, CCaaS, and Voice AI.
Free planWebAPI6.3Free plan - 136.2
- 14
Asterisk
Asterisk is a free, open-source framework for building communications applications.
Free planAPILinuxSelf-hosted6.0Free plan - 15
Kamailio
Free planAPILinuxSelf-hosted5.9Free plan - 16
VoIP.ms API
AndroidiOSWeb5.4 - 17
Amazon Chime SDK Voice Connector
WebAPISelf-hosted5.3 - 18
EnableX Voice API
AndroidiOSWeb5.3 - 19
Twilio Programmable Voice
AndroidiOSWeb5.3 - 20
Kaleyra Voice API
Kaleyra Voice API is a programmable calling service for businesses that need voice features inside apps and websites.
API5.1 - 215.0
- 22
5.0 - 23
Twilio Elastic SIP Trunking
Twilio Elastic SIP Trunking is a paid web-based service for SIP trunking.
Web4.9 - 244.7
- 254.7
- 264.7
- 27
Kazoo
Web4.7 - 284.7
- 29
sipgate.io
Web4.7 - 304.7