Stop paying for a platform you don't use.

Three reasons: cost (no per-channel fees, no platform markup, wholesale carrier rates), attestation (direct A-level from the signing carrier rather than through Twilio's intermediate infrastructure), and support (engineers who understand VICIdial and dialer operations rather than developer-focused support). If you use Twilio's SIP trunk and nothing else from their platform, you are paying CPaaS overhead for a product that is simpler and cheaper from a direct carrier.

Typical savings for call center operations: 20 to 40 percent. The savings come from eliminating per-channel fees (Twilio charges per concurrent channel, SIPNEX does not), lower per-minute rates (carrier-direct vs CPaaS markup), and no platform fees. A 50-agent operation running 500,000 minutes per month typically saves $1,000 to $3,000 per month by switching.

Yes. Standard LNP porting process. Submit a Letter of Authorization, we submit the port request, numbers transfer in 7 to 14 business days. You can start dialing on new SIPNEX DIDs immediately while Twilio numbers port in the background. No service interruption.

No. SIPNEX provides SIP trunk credentials — proxy address, authentication, and you configure your PBX or dialer. If you need programmable voice APIs, webhooks, or serverless functions, Twilio's platform is the right tool. If you need a SIP trunk for your VICIdial, Asterisk, or FreePBX, you do not need an API — you need a carrier. SIPNEX is the carrier.

SIPNEX signs as a direct FCC-licensed carrier with our own SP-KI certificate. Twilio holds a certificate but their infrastructure sits on top of Bandwidth's network. Both can deliver A-level attestation for provisioned DIDs. The SIPNEX advantage: shorter signing chain (direct carrier, no intermediate layer) and support that troubleshoots attestation issues at the carrier level rather than the platform level.

Trunk configuration: 1 to 2 hours (change SIP proxy credentials in your PBX). DID provisioning: 24 hours for new SIPNEX numbers. Number porting: 7 to 14 business days. You can run both carriers during the transition — Twilio for numbers still porting, SIPNEX for new DIDs — and cut over completely once all ports finish.

SIPNEX provides SMS and MMS messaging alongside voice. Your DIDs support both voice and text on the same number. A2P 10DLC registration handled. If you use Twilio's advanced messaging APIs (conversations, WhatsApp, email), those features do not exist on SIPNEX — we focus on carrier-grade voice and standard SMS/MMS.

No. SIPNEX has no minimum term, no minimum volume, and no early termination fee. Wholesale rates apply based on actual monthly usage. If you want to test us alongside Twilio for a month before fully migrating, there is no commitment preventing that.