Alternatives to Janus

Kamailio

Communication APIs

Open-source SIP server providing VoIP, WebRTC, and real-time communication services with high scalability and flexible routing.

Mercure

Communication APIs

Open protocol and reference implementation for real-time communications using Server-Sent Events for push updates.

Daily

Communication APIs

Daily is a WebRTC-based video and audio API platform for developers building real-time communication features into applications.

Kurento

Team Messaging

Open-source WebRTC media server providing enabling platform for real-time communication media stream processing.

Asterisk

Business VoIP

Open-source communication framework powering IP PBX systems, VoIP gateways, and conference servers used by millions worldwide.

K-12 family engagement software (now part of PowerSchool) focused on attendance interventions.

Nylas

Communication APIs

Email, calendar, and contacts API platform for embedding communication features into applications.

VideoSDK

Communication APIs

Low-latency video and audio APIs and SDKs for adding interactive meetings and live streaming to any app.

ClickSend

Communication APIs

Multi-channel communication platform offering SMS, MMS, email, voice, fax, and direct mail APIs with global coverage and competitive pricing.

PostGrid

Communication APIs

PostGrid automates direct mail with address verification, template customization, and mail tracking APIs, integrating with CRMs and business platforms for automated workflows.