Routr
Programmable SIP proxy, registrar, and location server
1.7k stars 179 forks last commit first released MIT
Actively maintained
Last commit 6 Jul 2026.
Routr is a lightweight, cloud-ready SIP server that acts as a proxy, registrar, and location service for modern VoIP networks. It is designed to be programmable and scalable, making it suitable for carriers, communication service providers, and integrators.
Key Features
- Core SIP server functions: proxy, registrar, and location service
- Programmable routing with configurable strategies (intra-domain, ingress/egress, peer egress)
- Load balancing and session affinity for upstream media servers (for example Asterisk or FreeSWITCH)
- Multi-tenant and multi-domain support with domain-level access control lists
- Multiple transports: UDP, TCP, TLS, WS, and WSS
- Pluggable processors and middleware for extending routing and cross-cutting concerns
- Server management via APIs and tooling (CLI and gRPC management API)
- Flexible data sources, including Redis-backed location service and PostgreSQL
Use Cases
- Run a scalable SIP edge/proxy in front of one or more PBXs or media servers
- Build programmable SIP routing for multi-tenant VoIP platforms
- Deploy carrier-grade SIP infrastructure on Docker or Kubernetes
Routr provides a modern approach to SIP infrastructure by combining core SIP capabilities with APIs, extensibility, and cloud-native deployment patterns. It is a strong fit when you need a configurable SIP control plane that can integrate cleanly into automation and platform workflows.
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