ShadowPBX

7.1easy start · #92of 174
in Business Phone Systems

Free to practise onyes
Well documentedyes
Runs where you workno

Runs on api, self-hosted. Paid plans from $29/mo.

ShadowPBX is ranked #92 of 174 in business phone systems on The Geeks Club. It runs on API, Self-hosted. There is a free plan. Paid plans start at $29/mo.

ShadowPBX plans and pricing

All plans

Self-Hosted Free Free forever — MIT License Unlimited extensions · Unlimited concurrent calls shadowpbx.com · 22 Sept 2026

Managed — Starter $49/mo billed monthly 10 extensions · 5 concurrent calls · 10 GB recording storage shadowpbx.com · 22 Sept 2026

Managed — Pro $149/mo billed monthly 50 extensions · 20 concurrent calls · 50 GB recording storage shadowpbx.com · 22 Sept 2026

Enterprise Dedicated infrastructure · Custom integrations · SLA guarantees · On-premise deployment assistance · Hands-on support shadowpbx.com · 22 Sept 2026

Pay As You Go Free $0 / mo base Outbound: $0.012/min (US/CA) · Inbound: free (unlimited) · 1 SIP trunk channel · Local DID: $1.50/mo · Toll-free DID: $3.00/mo shadowpbx.com · 11 Oct 2026

Self-Hosted Free forever · MIT license No per-seat fees · all features included shadowpbx.com · 11 Oct 2026

Compared on business phone systems

Free plan: Yes
Included users: 10 users
Business numbers: multiple
Auto attendant: Yes
Call routing: custom

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The record

Product: ShadowPBX is an open-source, self-hosted IP phone system built in Node.js.
Telephony: It supports SIP registration, inbound DID routing, outbound routing, call queues, IVR, voicemail, call recording, and supervisor monitoring.
Dialers: Dialing features include auto, predictive, power, and progressive dialers, plus campaign management and Do Not Call list scrubbing.
Trunk integrations: The maker lists verified compatibility with SignalWire, Twilio, and Telnyx, and compatibility with Vonage, Flowroute, VoIP.ms, and Bandwidth.
Bring your own trunk: Users can connect an existing standards-compliant SIP trunk and configure it through the web GUI or API.
APIs: The product provides REST APIs, including for call transfer, voicemail management, and supervisor monitoring.
Recordings: A dedicated background worker converts RTPEngine packet captures to WAV files and links recordings to call detail records.
Dashboard: A Socket.IO dashboard displays active calls, registered extensions, call statistics, and system health.
Security: The maker describes HTTPS and WSS through an Nginx reverse proxy with Let's Encrypt certificates, fail2ban protection, and SIP registration rate limiting.
Access controls: The product has Admin, Supervisor, and Agent roles with scoped access, and uses bcryptjs password hashing.
Deployment: The product is designed to be installed on the user's server, and the maker advertises a single install script.
License: The project is MIT licensed, with the maker stating that all features are available without paid modules or feature gates.
Support and development: The maker invites users to open issues and submit pull requests through the project repository.
Company details: The about page does not state a headquarters or founding year.
Price from: $29/mo

Where it ranks on The Geeks Club

Best Business Phone Systems in 2026#92 of 174

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Sources

shadowpbx.com· checked 11 Oct 2026
shadowpbx.com/features· checked 11 Oct 2026
shadowpbx.com/sip-trunking· checked 11 Oct 2026
shadowpbx.com/about· checked 11 Oct 2026
shadowpbx.com/pricing· checked 22 Sept 2026
shadowpbx.com/landing· checked 11 Oct 2026