Licensed by concurrent calls (channels) — never per user or per extension. A channel is any call in progress at the same moment, whether it's an outside call or a call between your own extensions. Every Professional tier includes every Professional feature.
| Plan | Concurrent calls | Monthly | Annual | Good for |
|---|---|---|---|---|
| Community | up to 2 | Free | Free | Home office, labs, micro offices |
| Professional 4 | up to 4 | $2.95 | $29 | 3–15 staff |
| Professional 8 POPULAR | up to 8 | $4.95 | $49 | 15–30 staff |
| Professional 16 | up to 16 | $9.95 | $99 | 30–60 staff |
| Professional 32 | up to 32 | $24.95 | $249 | 60–120 staff |
| Enterprise | 32+ / unlimited | Custom — talk to us | Large sites, call centers, HA & SLA | |
Unlimited extensions and users on every plan, including Community. You never pay per person — only for how many calls can happen at once.
A channel is one simultaneous call — counting both outside calls and calls between your own extensions. A typical office needs roughly 1 channel per 3–4 people; call-center style teams closer to 1 per 1.5. LinuxPBX shows your live and peak channel usage on the dashboard, so upgrading is never guesswork — and upgrades apply instantly.
SIP extensions, ring groups, basic IVR, voicemail with email delivery, call recordings, call history & basic reports, 1 tenant, community support. No time limits, no feature traps — a real PBX for a small office.
Everything in Community plus: call queues, conference rooms, multi-tenant, phone auto-provisioning (coming), full REST API & webhooks (coming), scheduled backups, advanced reports, security audit, ticket support with next-business-day response.
Everything in Professional plus unlimited channels, high availability & clustering (roadmap), SSO, compliance recording archive, and SLA-backed support. Contact us.