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Tech riderRev. 22 Sept 2026

OPBX

Ch 1486.6of 174Business Phone Systems
  1. 1Runs onAPI, Linux, self-hosted, Web
  2. 2Call routingcustom
2 lines stated Written from the maker's own pages: github.com
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The OPBX homepage

Overview

OPBX is ranked #148 of 174 in business phone systems on Specifiction. It runs on API, Linux, Self-hosted, Web.

Compared on business phone systems

Free plan
Yesgithub.com
Call routing
customgithub.com

Facts

Product
OPBX is an open-source, multi-tenant business PBX platform built on Cloudonix CPaaS.developers.cloudonix.com · 12 Oct 2026
Call handling
It routes DID calls to extensions, ring groups, IVRs, business hours, conference rooms, AI assistants, and AI load balancers.developers.cloudonix.com · 12 Oct 2026
Call security
Inbound blacklists and outbound whitelists provide controls for unwanted calls and destinations.developers.cloudonix.com · 12 Oct 2026
Dialer
The outbound auto dialer supports scheduled campaigns, concurrent-call and call-speed limits, voicemail detection, retries, and real-time monitoring.developers.cloudonix.com · 12 Oct 2026
AI routing
AI load balancers distribute incoming calls by round robin, priority, or percentage and can fail over to another assistant.developers.cloudonix.com · 12 Oct 2026
Multi-tenant use
The platform supports isolated organizations and is designed to let service providers manage multiple organizations.developers.cloudonix.com · 12 Oct 2026
Roles
The documented roles are Owner, PBX Admin, PBX User, and Reporter, with different access permissions.developers.cloudonix.com · 12 Oct 2026
Integration
OPBX delegates VoIP call handling and SIP services to Cloudonix CPaaS, configured with a domain UUID, API key, and public webhook URL.developers.cloudonix.com · 12 Oct 2026
API
The OPBX REST API is documented with OpenAPI 3.1.0.developers.cloudonix.com · 12 Oct 2026
Security
The security documentation describes role-scoped API tokens that expire after 24 hours and encrypted Cloudonix API keys.developers.cloudonix.com · 12 Oct 2026
Deployment
The installation guide recommends Docker Compose for production and local development, and lists minimum requirements of 4 GB RAM and 20 GB disk space.developers.cloudonix.com · 12 Oct 2026
Operational limits
The Auto Dialer is available only to Owners and PBX Admins.developers.cloudonix.com · 12 Oct 2026
Support
The maker offers support through a ticketing system and a Discord community.developers.cloudonix.com · 12 Oct 2026
Free access
The OPBX page invites users to open a free OPBX Cloud testing account.developers.cloudonix.com · 12 Oct 2026
What it is
OPBX is an open-source, multi-tenant business PBX built on Cloudonix CPaaS.developers.cloudonix.com · 13 Oct 2026
Outbound campaigns
Its auto dialer supports scheduled campaigns, call-rate limits, voicemail detection, retries, and real-time monitoring.developers.cloudonix.com · 13 Oct 2026
Integrations
OPBX uses Cloudonix CPaaS for call handling and SIP services, and supports AI assistants configured over SIP or WebSocket.developers.cloudonix.com · 13 Oct 2026
Access controls
The platform has Owner, PBX Admin, PBX User, and read-only Reporter roles, with tenant data isolation.developers.cloudonix.com · 13 Oct 2026

Best OPBX alternatives

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Where it ranks on Specifiction

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Sources