Compare Fonoster vs. Kamailio in 2025

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Description

Develop intelligent voice solutions tailored to your business requirements, free from unnecessary functionalities and the complications of outdated customizations. Identify the VoIP providers and integrations that best fit your needs, and easily implement them in your voice applications through a streamlined API. With cutting-edge conversational AI powered by an advanced virtual agent, the CX edition of Fonoster facilitates effortless VoIP network deployment. For instance, you can establish a SIP trunk to connect to the PSTN and allocate numbers for both incoming and outgoing calls. Additionally, you have the capability to build your Office or Home network by merging Domains and Agents seamlessly. Thanks to SIP technology, you can link to your VoIP network using either a Softphone or an IP Phone, ensuring flexibility in your communications. Enhance your business security with project-level authentication utilizing OAuth2 and JWT tokens, while also enabling the deployment of existing microservices via frameworks like Express.js, Sinatra, or ASP.NET Core, or opt for a more straightforward approach with functions. This comprehensive solution empowers businesses to streamline their voice application development while maintaining robust security and flexibility.

Description

Kamailio® is an open-source SIP server, which evolved from the earlier OpenSER and SER, and is distributed under GPLv2+, capable of managing thousands of call setups each second. This robust platform can be utilized for constructing extensive systems for VoIP, real-time communication, presence, WebRTC, instant messaging, and various other applications. Additionally, Kamailio is well-suited for scaling SIP-to-PSTN gateways, PBX systems, or media servers such as Asterisk™, FreeSWITCH™, or SEMS with ease. Its extensive feature set includes support for asynchronous TCP, UDP, and SCTP, secure communication through TLS for voice, video, and text, as well as WebSocket compatibility for WebRTC. The server supports both IPv4 and IPv6, offers simple instant messaging and presence capabilities with an integrated XCAP server and MSRP relay, and enables asynchronous operations. Furthermore, it includes IMS extensions for VoLTE, ENUM functionality, DID and least cost routing, load balancing, and routing failover. Kamailio also provides comprehensive accounting, authentication, and authorization features, while supporting a variety of backend systems, including MySQL, Postgres, Oracle, Radius, LDAP, Redis, Cassandra, MongoDB, and Memcached. All these capabilities make Kamailio a versatile choice for modern communication infrastructures.