Asterisk
Depends
Confidence: Medium
Asterisk is a powerful free PBX engine for teams with in-house VoIP/Linux engineers.
Comparison
Asterisk and FreePBX both land on Depends.
Asterisk is a powerful free PBX engine for teams with in-house VoIP/Linux engineers.
Buy if you have Linux/VoIP admin skills and will patch fast . the core is free and deep.
| Compare | Asterisk | FreePBX |
|---|---|---|
| Verdict | Depends | Depends |
| Best for | Teams with in-house VoIP engineers | MSPs managing many client phone systems |
| Who it's not for | Small offices wanting a phone that just works | Non-technical teams wanting plug-and-play phones |
| Privacy | Mature project with a real security process . but a steady CVE flow, including 2026 RCE and privilege-escalation flaws; patching is your job.⁴ | Multiple critical 2025 vulnerabilities, including actively exploited unauthenticated RCE; requires rapid patching and lockdown16 |
| Support quality | Peer forums only; poor-experience reports exist | Community forums; paid support is Sangoma-only |
| Public sentiment | Users value the flexibility and zero license cost but warn it demands real VoIP expertise, with community-only support.⁵ | Users praise FreePBX's flexibility and free price but flag the security burden, paid module creep, and uneven support. |
| Biggest gotcha | Internet-exposed Asterisk servers are frequent fraud targets; hardening is mandatory, not optional. | August 2025 zero-day let attackers root unpatched, internet-facing servers; emergency patch required |