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    Routr

    Routr

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    Tech
    Open Source
    Telephony

    Open-source, cloud-native SIP server: proxy, registrar and location server for voice networks.

    Founded 2017Raleigh, United StatesLinkedIn
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    About Routr

    Routr: The SIP Server Built for the Cloud

    Routr is an open-source SIP server that combines a SIP proxy, location server and registrar in one lightweight, cloud-native package. It routes calls between phones, carriers and media servers such as Asterisk and FreeSWITCH, giving voice applications and AI agents a scalable signaling layer on Docker or Kubernetes.

    Key Features

    • Proxy, Registrar and Location Server: Handles SIP registration, endpoint lookup and call routing in a single server.

    • Media Server Load Balancing: Sits in front of Asterisk and FreeSWITCH and spreads calls across them with round-robin, least-sessions or session affinity.

    • Routr Connect: Built-in processor for SIP Connect 1.1 that lets you describe numbers, trunks, agents and domains as resources while Routr handles the routing.

    • Stateless Architecture: Only the EdgePorts hold state; every other service runs as stateless replicas, with location data shared on Redis.

    • No Single Point of Failure: Each service runs in its own pod, so calls keep flowing when an EdgePort or processor goes down.

    • Programmable in Any Language: Processors and middlewares are gRPC services you can write in Node, Go or Java and swap in.

    • Record and Replay: Records every SIP message of a call and plays it back message by message, with checks against the SIP standards carriers expect.

    • Broad Transport Support: Accepts UDP, TCP, TLS, WS and WSS connections from softphones, desk phones, media servers and carriers.

    • Deploy Anywhere: Runs as a single Docker container with Postgres included, or as a Helm chart on Kubernetes where every service autoscales.

    Use Cases

    • Voice AI Telephony: Provide the SIP signaling layer that connects AI voice agents to carriers and phone numbers.

    • Scaling PBX and Media Servers: Put one SIP address in front of an Asterisk or FreeSWITCH cluster and spread the load.

    • Carrier and CPaaS Networks: Route calls across trunks, numbers and domains for communication platforms.

    • Intercom, Camera and Radio over IP: Wire up intercom and paging networks, camera networks and radio over IP systems.

    Pricing

    Routr is free and open source under the MIT license. The team that builds Routr also offers help with training, deployment and support.

    Getting Started

    Routr gives developers and telecom teams a modern, Kubernetes-ready SIP server to route, scale and debug calls across their voice network, from traditional phone systems to AI voice agents.

    Pedro Sanders

    Pedro Sanders

    Creator of Routr, Founder at Fonoster

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