Best SIP Trunk Provider for Asterisk & FreePBX in 2026
Choosing the right SIP trunk provider for your Asterisk or FreePBX system can make or break your phone setup. We compared 6 providers on pricing, reliability, codec support, encryption, and Asterisk compatibility to help you decide.
What to Look For in an Asterisk SIP Trunk Provider
Not every SIP provider works with Asterisk. Many cloud-only providers offer proprietary APIs or WebRTC-only solutions that do not work with traditional SIP endpoints. Here is what actually matters:
Standard SIP/PJSIP
Must work with chan_pjsip. No proprietary APIs or custom protocols.
IP Authentication
Most reliable for static IPs. No registration traffic overhead.
G.711 Codecs
ulaw/alaw for toll-quality. Avoid providers forcing compressed codecs.
TLS/SRTP
Encryption for signaling and media. Should be included free.
Number Porting
Bring existing numbers. Easy porting at $5/number.
Technical Support
Real humans who know Asterisk, not generic chatbots.
Provider Comparison Table
| Provider | Rate/min | Monthly | Contracts | TLS/SRTP | IP Auth | Porting |
|---|---|---|---|---|---|---|
| IPComms | $0.01 | $1.50/DID | None | Included | Yes | $5/number |
| SIP.US | $0.015 | $24.95/ch | None | Yes | Yes | Yes |
| Telnyx | $0.004 | $1/DID | None | Yes | Yes | $5-25 |
| VoIP.ms | $0.01 | $0.85/DID | None | Yes | Yes | $25 |
| SIPStation | Unlimited | $24.99/ch | Annual | Yes | Yes | Yes |
| Twilio | $0.013 | $1/DID | None | Yes | Yes | Yes |
1. IPComms - Best Overall for Asterisk
IPComms has been providing SIP trunking since 2002, making them one of the longest-running providers in the space. Their service is purpose-built for traditional PBX systems like Asterisk, FreePBX, and FusionPBX.
- $0.01/min to US and Canada - among the lowest in the industry
- IP authentication by default - no registration overhead
- TLS/SRTP included at no extra cost
- No contracts - month-to-month, cancel anytime
- Instant provisioning - trunk active in minutes
- Real human support from engineers who know Asterisk
- Number porting ($5/number) - local and toll-free
- E911 support with address validation
- Local and toll-free DIDs across US and Canada
Ideal for: Small to mid-size businesses running Asterisk who want dead-simple setup, low per-minute rates, and support from people who understand SIP.
Setup guide: See our step-by-step PJSIP trunk configuration tutorial for copy-paste-ready config examples.
2. SIP.US - Good for FreePBX Users
SIP.US offers per-channel pricing at $24.95/month with a FreePBX module for easy setup. They provide remote configuration assistance and a free trial with 60 minutes of calling.
Pros: FreePBX module, free trial, remote setup help, unlimited per-channel option.
Cons: Higher per-channel cost than pay-per-minute providers. $0.015/min is 50% more than IPComms. Limited international coverage.
Ideal for: FreePBX users who want GUI-based setup and prefer per-channel pricing.
3. Telnyx - Best for Developers
Telnyx is developer-focused with extensive APIs, real-time CDRs, and global reach across 100+ countries. Per-minute rates start at $0.004 for US calls.
Pros: Very low per-minute rates, Opus codec support, extensive API, global coverage, STIR/SHAKEN.
Cons: Porting costs $5-25/number. No phone support for non-enterprise. Portal overwhelming for non-developers.
Ideal for: Developers and high-volume call centers needing API integration and global numbers.
4. VoIP.ms - Best for Budget Home Labs
VoIP.ms is a Canadian provider popular in the Asterisk community for rock-bottom DID pricing ($0.85/month) and flexible pay-per-minute model.
Pros: Cheapest DIDs, no monthly minimum, huge DID coverage, community wiki.
Cons: No phone support (forums only). Porting costs $25/number. Had major DDoS outage in 2021 lasting days. Dated portal interface.
Ideal for: Hobbyists and home labs where support and uptime are not critical.
5. SIPStation - Best FreePBX Integration
SIPStation is made by Sangoma (the company behind Asterisk/FreePBX). It offers the tightest FreePBX integration with one-click trunk configuration via built-in module.
Pros: One-click FreePBX setup, built-in failover, unlimited calling per channel.
Cons: Requires annual commitment. $24.99/month per channel is expensive for low-volume. FreePBX-only focus. US/Canada DIDs only.
Ideal for: FreePBX shops wanting zero-config setup with annual commitment.
6. Twilio Elastic SIP Trunking - Best for Scale
Twilio is the largest cloud communications platform. Their Elastic SIP Trunking works with Asterisk and offers global reach with DIDs in 100+ countries.
Pros: Massive global coverage, enterprise-grade reliability, powerful API, HIPAA-compliant options.
Cons: $0.013/min is higher than specialized providers. Free tier gets only community support. Console designed for developers, not PBX admins.
Ideal for: Enterprise needing global coverage, compliance certs, and API-driven management.
Our Verdict: Best SIP Trunk for Each Use Case
Best Overall: IPComms
$0.01/min, no contracts, $5 porting, TLS/SRTP included, real human support. Best balance of price, features, and support.
Best for Developers: Telnyx
Lowest raw rates and powerful APIs. Requires technical expertise.
Best for Home Labs: VoIP.ms
$0.85/month DIDs. No phone support, history of outages.
Best FreePBX Module: SIPStation
One-click setup. Annual commitment required.
For most Asterisk administrators running a business PBX, IPComms offers the best combination: 23 years of reliability, the simplicity of IP authentication, and per-minute pricing that scales from a few calls to thousands.
Try IPComms SIP Trunking
No contracts. Your trunk is active in minutes with instant DID provisioning.