Asterisk vs Kaleyra Voice API
Asterisk
asterisk.orgKaleyra Voice API
tatacommunications.comSide by side
| Figure | Asterisk | Kaleyra Voice API |
|---|---|---|
| Price from | Free | — |
| Free plan | Yes | — |
| Free trial | — | — |
| Open source | — | — |
| Linux | Yes | — |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 1 | 1 |
| Spec score · Voice APIs | 8.0 (#9) | 6.9 (#17) |
| Integrations | The site says Asterisk can connect communications to applications, including Salesforce automation or CRM systems using AMI. | The APIs are designed to integrate with CRMs, marketing platforms, agent desktops, and custom apps using standard interfaces. |
| Support | Sangoma offers five support levels for core components of current open source Asterisk versions, with Level 5 reserved for customers requiring an SLA and engineering support. | Tata Communications offers guidance, tailored deployment support, and dedicated onboarding support for the API. |
| Use cases | Asterisk powers IP PBX systems, VoIP gateways, conference servers, call centers, voicemail servers and IVR systems. | The page lists IVR, outbound campaigns, click-to-call, call masking, reminders, emergency alerts, and automated support as use cases. |
Plans
In their own words
Asterisk
Asterisk is a free, open-source framework for building communications applications and turning an ordinary computer into a communications server. It powers IP PBX systems, VoIP gateways, conference servers, call centers, voicemail servers, and IVR systems. Listed functions include call routing, recording, queuing, conferencing, voicemail, automated attendants, and call transfers. Computer-telephony interfaces include AGI, AMI, and the Asterisk REST Interface (ARI); listed VoIP protocols include SIP, H.323, IAX, Jingle/XMPP, MGCP, and SCCP. Asterisk can connect communications to applications, including CRM systems through AMI. The source code can be downloaded, and the project points users to installation on a modern cloud Linux instance. Building applications requires working knowledge of Linux, scripting, networking, and telephony. Asterisk is distributed under GPLv2; Sangoma offers commercial licensing for uses incompatible with that license. The Asterisk forum provides community help with installation, upgrades, and operation.
Kaleyra Voice API
Kaleyra Voice API has no write-up on Specifiction yet; its figures are above.