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FusionPBX vs 3CX Free Basic: catalog facts
FusionPBX	3CX Free Basic
Free Free to download and run on your own server.	Freemium Free for up to 10 users and 4 simultaneous calls; larger editions are paid.
Web, Self-hosted	Self-hosted
Multi-tenant PBX managed from a web interface Covers call center, fax, voicemail and conferencing	No licence cost for small teams Runs on your own infrastructure
Requires running and maintaining your own FreeSWITCH server Aimed at administrators with telephony knowledge	Limited to 10 users and 4 simultaneous calls Proprietary software
Self-hosted	Self-hosted
Open source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.