SigSpan is a drop-in email-to-text bridge. Point any device, sensor, or script that already sends email at a unique SigSpan address, and we deliver it to your on-call team as a standard phone text — no app, no SDK, no code changes.
Your device, sensor, or script emails its alert to a unique SigSpan address — exactly as it already sends email today.
SigSpan parses the email, applies your routing rules, and dispatches it for text delivery.
Your on-call team gets the alert as a standard text message — on any phone, no app or internet required.
If it can send an email, it works with SigSpan. The most common sources are hardware and automation that can email an alert but can't text one directly:
Battery, load, and power-loss alerts from UPS units and PDUs delivered straight to on-call as a text.
Server-room temperature, humidity, water, and door sensors that email on threshold breaches.
Generator run/fault alerts and other facility equipment that can email but not text directly.
Shell scripts, cron jobs, and runbooks that already page via mail or sendmail — no rewrite needed.
For decades the cheapest way to get email to text was a carrier's free email-to-SMS gateway — addresses like number@vtext.com or number@txt.att.net. Those gateways are being shut down: T-Mobile's tmomail.net ended in December 2024, AT&T's txt.att.net in June 2025, and Verizon's vtext.com follows on March 31, 2027.
SigSpan is the drop-in replacement: change the destination address your devices and scripts send to, and your alerts keep arriving as texts — reliably, and without rebuilding anything.
Email to text converts an email into an SMS text message delivered to a phone. You send an email to a special address, and the recipient receives the content as a standard text. IT teams have relied on it for decades to turn monitoring and device alerts into pages that reach on-call engineers on any phone, with no app required.
For years the carriers offered free email-to-SMS gateways (vtext.com, txt.att.net, tmomail.net) as a courtesy — and they are being shut down. SigSpan is a reliable, paid, drop-in replacement: instead of emailing a carrier gateway, you point the same alert emails at a unique SigSpan address, and we deliver them as texts — with delivery you can depend on, audit logging, and built-in TCPA compliance.
Anything that can send an email. That includes hardware like UPS units, temperature and environmental sensors, and generator monitors; cron jobs and shell scripts; legacy applications; and any monitoring tool. There is no SDK, no API to integrate, and no code change — if it can send an email, it works with SigSpan.
If you send application-to-person SMS through a US long code, A2P 10DLC registration is required by the carriers, not by the SMS provider. SigSpan handles the registration mechanics; you supply brand and campaign details. Registration typically takes days to weeks, so start it before your cutover.
Pay-as-you-go: $0.05–$0.10 per text depending on volume, with no monthly platform fees and no minimums. A 15-day free trial is available with no credit card required.
15-day free trial. No credit card required. Pay-as-you-go from $0.05 per text after that.