FusionPBX
Free, open-source multi-tenant PBX built on FreeSWITCH, for VoIP providers and IT teams that self-host phone systems. Paid memberships from $100/mo.
FusionPBX is free, open-source PBX software that adds a web interface and call features to the FreeSWITCH telephony engine, with multi-tenant hosting built in. It is for VoIP providers, MSPs and IT teams that can run their own Linux servers. The software costs nothing; optional memberships with training and support run $100 to $1,000 a month on a 1-year commitment.
Excellent value for skilled VoIP teams; not for businesses wanting a managed phone line.
Free, self-hosted PBX software: a web interface and apps that turn FreeSWITCH into a multi-tenant phone system.
FusionPBX is a good fit when you have Linux skills and want to host phone service for many tenants without per-seat fees. Budget for the hidden cost: official support only comes with a $300+ monthly membership on a 12-month term.
It delivers carrier-style, multi-tenant PBX features for free and is still released regularly.
Self-hosting skills are required, and paid support needs a 12-month membership.
FusionPBX software and membership prices
| Option | Price | Support | Includes |
|---|---|---|---|
| FusionPBX software | Free | Community (docs, IRC) | Full PBX under the Mozilla Public License 1.1; self-hosted |
| Green membership | $100/month | None | Training videos, member docs, rebranding, Send Email and Domain Backup apps; 1 person; up to 5 servers |
| Blue membership | $300/month | Up to 1.5 hours a month | Green plus Conference CDR and Call Center Notify; up to 10 servers |
| Purple membership | $500/month | Up to 3 hours priority a month | Blue plus call center wallboard, summary, announce and callback apps, JSON REST API; up to 15 servers |
| Gold membership | $1,000/month | Up to 6 hours priority a month | Purple for up to 3 employees; up to 30 servers |
From FusionPBX's members page, checked 4 October 2026. All memberships require a 12-month commitment. License from the source files on GitHub.
FusionPBX vs FreePBX vs Aircall
| FusionPBX | FreePBX | Aircall | |
|---|---|---|---|
| Engine or model | FreeSWITCH, self-hosted | Asterisk, self-hosted | Hosted cloud service |
| Software price | Free | Free | From $30/license/month billed annually, 3-license minimum |
| Paid support | Memberships from $300/month (1-year term) | From $399/year per system (Sangoma) | Included with plan |
| Who runs the servers | You | You | Aircall |
From fusionpbx.com (checked 4 October 2026), freepbx.org and sangoma.com via our FreePBX research (checked 2 October 2026), and aircall.io/pricing (checked 4 October 2026).
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