Callivex SIP Trunking vs Flowroute
Callivex SIP Trunking
callivex.comFlowroute
flowroute.comSide by side
| Figure | Callivex SIP Trunking | Flowroute |
|---|---|---|
| Price from | — | $0.01/mo |
| Free plan | — | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | — | Yes |
| Android | — | Yes |
| API | Yes | Yes |
| Plans published | 1 | 11 |
| Spec score · SIP Trunking Providers | 7.3 (#12) | 8.9 (#3) |
| Headquarters | London, United Kingdom | Seattle, Washington, United States |
| Phone numbers | Callivex offers inbound local, national, and toll-free numbers in 96 countries, with toll-free availability subject to local regulations. | Customers can buy or port local, toll-free and vanity numbers in the United States and Canada with caller ID, E911 and CNAM options. |
| Support | The network operations centre handles live faults 24 hours a day, while quotes, onboarding, and account changes are handled during UK business hours. | Flowroute offers free, non-tiered support, with phone support 13 hours a day Monday through Friday and email ticket responses every day. |
| What it does | Callivex provides bidirectional SIP trunks that connect PBXs, contact-center platforms, and softswitches to the public telephone network over IP. | Flowroute is a self-service, cloud-based SIP trunking and business-messaging CPaaS provider offering a-la-carte telephony components through APIs and a management portal. |
Plans
Flowroute
- CNAM lookupFree
- Long-code SMSFree
- Domestic inbound calling$0.01 a month
- Long-code MMS$0.01 a month
- Toll-free calling$0.01 a month
- Toll-free SMS$0.01 a month
- US/Canada outbound calling$0.01 a month
- Toll-free MMS$0.02 a month
- DID number$1 a month
- E911 associationPrice not published
In their own words
Callivex 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.