Incredible PBX review
A capable free PBX for technical teams willing to manage their own telephony stack.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Incredible PBX is a free, open-source unified communications and VoIP platform for organizations and technical users that want to operate and customize their own business phone system. It bundles Asterisk, FreePBX, operating-system components, security tools, fax software, and administrative utilities. Deployment options include on-premises hardware, virtual machines, cloud platforms, and Raspberry Pi devices, with Linux, Windows, and macOS listed as supported platforms. It fits small, mid-market, and enterprise environments that can take responsibility for their PBX infrastructure.
The feature set covers core business telephony and several adjacent communications needs. SIP and IAX support, Asterisk and FreePBX integration, configurable inbound and outbound routing, IVR and auto-attendant configuration, and multiple business numbers provide the foundation for a customizable phone system. Voicemail transcription can be delivered by email, while HylaFax and AvantFax support faxing. SMS integration through SIP trunking, conferencing, voicemail blasting, and telephony applications broaden the system beyond basic calling. Integrations include ClearlyIP, Skyetel, VoIP.ms, V1VoIP, and Anveo Direct, alongside Asterisk, FreePBX, SIP, and IAX.
The main trade-off is operational responsibility. Community support and documentation are the stated support channels, so teams should be prepared to handle deployment, configuration, security components, and ongoing administration. The software itself is free and open source, but telephony trunks, phone numbers, hosting, and hardware may create separate provider or infrastructure costs. Choose Incredible PBX if control, customization, and self-hosting matter more than a managed setup. Organizations seeking a phone system with less technical ownership should consider a different approach.
Incredible PBX pros and cons
- Where it wins
- Free, open-source PBX with SIP and IAX support
- IVR, routing, voicemail transcription, fax, SMS, and conferencing
- Includes firewall, VPN, and intrusion-prevention components
- Where it doesn't
- Requires technical ownership for deployment and administration
- Telephony trunks, numbers, hosting, and hardware cost extra
- Support is centered on community resources and documentation
Incredible PBX fact sheet, pricing and score →
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