Asterisk vs Callr
Asterisk
asterisk.org
Callr
callr.comSide by side
| Figure | Asterisk | Callr |
|---|---|---|
| Price from | Free | €599/mo |
| Free plan | Yes | — |
| Free trial | — | Yes |
| Open source | — | — |
| Web | — | Yes |
| Linux | Yes | — |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 1 | 2 |
| Spec score · Voice APIs | 8.0 (#9) | 9.0 (#1) |
| Founded | 1999 | 2011 |
| Integrations | The site says Asterisk can connect communications to applications, including Salesforce automation or CRM systems using AMI. | Callr lists native connectors for Salesforce, HubSpot, Google Analytics, and Google Ads, plus a REST API and webhooks. |
| 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. | Callr describes 24/7 support as part of its service and lists premium customer support for Enterprise. |
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.