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Voice APIs

Alternatives to Wazo Platform

Wazo Platform is a free, GPL-3 telecom stack for developers building programmable voice, video, messaging and presence. Its Python microservices expose WebRTC, REST, WebSockets and Webhooks, supporting calls, chat, conferences, voicemail and call centers. Custom routing and an auto attendant are included, while deployment spans bare metal, virtual machines and containers. APIs can connect billing and services such as speech-to-text, AI or sentiment analysis. Android, iOS, Linux, web and self-hosted environments are supported.

  1. 01 Callr
    From €599/mo Free trial Web · iOS · Android · API
    9.0 Visit Specs
  2. 02 D7 Networks

    It suits teams needing programmable SMS, WhatsApp messaging, number lookup, or verification, with SDKs and listed integrations for connecting to other services.

    Free plan Web · API
    8.9 Visit Specs
  3. 03 46elks
    From €3/mo Free plan Web · API
    8.7 Visit Specs
  4. 04 Telnyx SIP Trunking

    It suits businesses needing global voice calling and PSTN connectivity, including enterprises.

    From $500/mo Free plan Web · iOS · Android · API
    8.6 Visit Specs
  5. 05 Aculab Cloud

    Aculab Cloud suits businesses building communications applications with APIs rather than specialist telephony equipment.

    Free trial Web · iOS · Android · API
    8.3 Visit Specs
  6. 06 CallFire API

    CallFire API suits developers integrating CallFire telephony into CRM platforms, mobile apps, or backend website systems.

    From $99/mo Free plan API
    8.2 Visit Specs
  7. 07 Plivo Voice API

    It suits developers building voice calling into web or mobile applications, including teams that need SIP support, call recording, or multiple call-handling features.

    From $0.01/mo Free trial Web · iOS · Android · API
    8.1 Visit Specs
  8. 08 Asterisk

    It suits teams building communications systems that can work with Linux, scripting, networking, and telephony.

    Free plan Linux · API · Self-hosted
    8.0 Visit Specs
  9. 09 FreeSWITCH

    FreeSWITCH suits teams building voice or video communication products that need call routing, protocol connections, or media processing.

    Free plan Windows · macOS · Linux · API
    8.0 Visit Specs
  10. 10 Infobip Voice API

    The Calls API suits developers building voice applications for mobile or web.

    Free trial Web · iOS · Android · API
    7.9 Visit Specs
  11. 11 Amazon Chime SDK PSTN Audio
    Web · Windows · iOS · Android
    7.8 Visit Specs
  12. 12 Kamailio
    Free plan Linux · API · Self-hosted
    7.8 Visit Specs
  13. 13 Amazon Chime SDK Voice Connector
    Web · API · Self-hosted
    7.5 Visit Specs
  14. 14 SIP.IO

    SIP.IO is intended for developers, BPOs and contact centers, and resellers or white-label operators.

    Free plan Web · API
    7.4 Visit Specs
  15. 15 Commio Voice API
    API
    7.0 Visit Specs
  16. 16 Kaleyra Voice API
    API
    6.9 Visit Specs
  17. 17 Orange Voice API
    API
    6.9 Visit Specs
  18. 18 Telnyx Voice API
    From $500/mo Free plan Web · iOS · Android
    6.9 Visit Specs
  19. 19 YateClient
    Windows · macOS · Linux · iOS
    6.9 Visit Specs
  20. 20 8x8 CPaaS Voice
    Web
    6.0 Visit Specs
  21. 21 Apifonica Voice API
    Web
    6.0 Visit Specs
  22. 22 Bird Voice API
    Web
    6.0 Visit Specs
  23. 23 EnableX Voice API
    Web · iOS · Android
    6.0 Visit Specs
  24. 24 Azure Communication Services SMS
    5.9 Visit Specs
  25. 25 Bandwidth Voice API
    5.9 Visit Specs
  26. 26 BICS Voice API
    Web
    5.9 Visit Specs
  27. 27 Alianza Crux API
    5.8 Visit Specs
  28. 28 CarrierX Programmable Voice
    Web
    5.8 Visit Specs
  29. 29 Cloudonix Voice API
    Web
    5.7 Visit Specs
  30. 30 Dollu Voice API
    5.7 Visit Specs

Choosing instead of Wazo Platform

The trade-off is a self-hosted build: the documented installation uses Debian 12 and Ansible, community support is provided through Mattermost, a forum and JIRA, and firewall rules require your configuration. The small-production guide specifies 2 CPUs, 4 GiB RAM and 50 GiB storage for about 50 users. Wazo Enterprise adds web or mobile applications and a management console. Compare alternatives by whether you need programmable telecom infrastructure or a packaged business phone or collaboration service, then weigh routing, messaging, apps, deployment and paid-plan costs.

Wazo Platform, head to head