FusionPBX vs FreePBX

FusionPBX and FreePBX both land on Depends.

FusionPBX

Depends

Confidence: Medium

A strong free choice if you are an ITSP or IT team with Linux, FreeSWITCH, and SIP skills who wants a self-hosted multi-tenant phone system.

Depends

Confidence: Medium

Buy if you have Linux/VoIP admin skills and will patch fast . the core is free and deep.

FusionPBX versus FreePBX
Compare	FusionPBX	FreePBX
Verdict	Depends	Depends
Best for	ITSPs and resellers running hosted multi-tenant PBX	MSPs managing many client phone systems
Who it's not for	Small offices wanting plug-and-play phones	Non-technical teams wanting plug-and-play phones
Privacy	Self-hosted software with a track record of public CVEs since 2019, including RCE; hardening is the operator's responsibility.^⁷	Multiple critical 2025 vulnerabilities, including actively exploited unauthenticated RCE; requires rapid patching and lockdown
Support quality	Community forums unless you pay membership	Community forums; paid support is Sangoma-only
Public sentiment	VoIP admins on Reddit favor FusionPBX for on-prem and multi-tenant work but lean heavily on community forums, tutorials, and forks to fill documentation gaps.^⁵	Users praise FreePBX's flexibility and free price but flag the security burden, paid module creep, and uneven support.
Biggest gotcha	Self-hosted: firewalling, fail2ban, and TLS hardening are entirely your job	August 2025 zero-day let attackers root unpatched, internet-facing servers; emergency patch required