Callivex SIP Trunking vs IPComms SIP Trunking

Callivex SIP Trunking provides bidirectional SIP trunks linking PBXs, contact-center platforms, and softswitches to the public telephone network over IP. Calls are billed for each connected second with five-decimal rate precision, without a 60-second minimum or six-second rounding. Accounts use prepaid balances with real-time usage visibility and no volume commitments. Trunks support IP authentication, SIP registration, or a hybrid configuration; the default IP-authentication setup allows up to eight source IPs. Callivex lists integration testing with Asterisk, FreeSWITCH, FreePBX, 3CX, Cisco UCM, and Microsoft Teams Direct Routing. Its network lists 218 termination destinations and inbound local, national, and toll-free numbers in 96 countries. Security features include TLS 1.2 or newer signaling, SRTP media, optional mutual TLS, source-IP enforcement, and SIP scanner mitigation. Fraud controls include country allowlists, spend caps, and anomaly detection. Pricing is on request, with custom rates and prepaid billing.

IPComms SIP Trunking connects a business PBX or session border controller to the public telephone network over the internet. The standard trunk has no per-channel fee or fixed channel count; concurrent calls depend on bandwidth and a fraud-protection limit that support can raise on request. SIP signaling is supported over UDP or TCP on port 5060 and TLS on port 5061, with G.711 μ-law, G.711 A-law, and G.729 codecs. IPComms lists two geographically separate US points of presence, inbound delivery to both, and automatic outbound failover. Trunks can use TLS signaling and SRTP media, and calls receive STIR/SHAKEN A attestation. The company lists compatibility with multiple PBX systems, Microsoft Teams Direct Routing, and contact-center connections. Its REST API supports number provisioning, trunk management, sub-account creation, and call-detail retrieval. Usage is billed from a prepaid balance. The service has a free plan, with paid service from $1.50/mo; E911 with a dispatchable location is available for $2.50 per number per month. A 30-day test trunk is available on request with limited call capacity and destinations.