Compare SIP3 and Freepbx on pricing, features, platforms, and ratings — both Communication tools, Free Community Edition / Paid Enterprise Edition vs Open…
At a Glance
SIP3
Freepbx
Primary category
Communication
Communication
Rating
Not documented
Not documented
Pricing model
Free Community Edition / Paid Enterprise Edition
Open Source / Free
Starting price
Free (Community Edition); Enterprise pricing available on request
Free (core software); commercial modules and Sangoma appliances priced separately
Free plan
Yes
Yes
Free trial
Not documented
Not documented
Platforms
Web
Web
Team collaboration
Not documented
Not documented
AI features
Not documented
Not documented
Public API
Yes
Yes
Pricing Compared
Starting price reflects the lowest paid tier, not the full cost for every team size or usage level.
SIP3
Community Edition (SIP3 CE) — Free N/A
Enterprise Edition — Custom pricing Custom
Freepbx
FreePBX Core (Open Source) — Free N/A
Commercial Modules — Varies by module One-time or subscription, per module
PBXact (Sangoma commercial) — Contact for pricing Custom
Pros & Cons
SIP3
Pros
Free, open-source Community Edition available for self-hosting
Built specifically for high-volume, carrier-scale VoIP traffic
Real-time call correlation speeds up support troubleshooting
Enterprise tier adds telecom-specific protocols like SS7 and ISUP
Cons
Enterprise pricing is not publicly listed and requires a sales conversation
Self-hosted deployment requires infrastructure and telecom protocol expertise
Smaller community and ecosystem compared to more general-purpose monitoring tools
Some Enterprise features (DPDK capturing, HostMap) are still in beta
Best suited to VoIP-specific use cases rather than general network monitoring
Freepbx
Pros
Core software is completely free and open source with no license fees
Backed by Sangoma, a publicly traded company, giving it long-term development stability rare among open-source projects
Powers over a million installations, meaning extensive community documentation, forums, and third-party expertise are available
Can run on modest, inexpensive hardware for small deployments
Optional commercial modules and PBXact give a clear upgrade path to professional support without forcing it on free users
Cons
Requires Linux system administration knowledge to install, secure, and maintain
Officially supported only on Debian Linux, limiting deployment flexibility for other distributions
Some genuinely useful features, like advanced endpoint management, are gated behind paid commercial modules
Telephony and VoIP configuration (SIP trunks, NAT traversal, codecs) has a steep learning curve for non-specialists
No official cloud-hosted SaaS version directly from the FreePBX project itself, requiring self-hosting or a third-party host
Use Cases
SIP3
Carrier-scale VoIP troubleshooting — Large telecom carriers use SIP3 to monitor and correlate signaling and media traffic across massive call volumes in real time.
Customer support call diagnostics — Support engineers use SIP3's advanced search and call correlation to quickly diagnose customer-reported call quality issues.
Self-hosted VoIP network monitoring — Smaller VoIP operators deploy SIP3 Community Edition via Docker to monitor their own SIP and RTC infrastructure at no license cost.
Freepbx
Small business phone systems — IT administrators deploy self-hosted FreePBX servers to run a full-featured business phone system without per-user SaaS licensing fees.
Managed service provider deployments — MSPs and telecom integrators deploy and support FreePBX or PBXact systems for multiple client businesses using Sangoma hardware and commercial modules.
Home-lab and hobbyist telephony — Telecom hobbyists run FreePBX on inexpensive hardware to learn VoIP administration or manage a personal or small-office phone system.