
When critical Systems fail, don't hope for the best... respond 10x faster!
Stay ahead of critical incidents with SIGNL4 and its superpowers. SIGNL4 provides superior and automated mobile alerting, delivers alerts to the right people at the right time and empowers operations teams to respond and to manage incidents from anywhere.
Faster Incident Response
%
Less Unexpected Downtime
%
Less False Alerts
A proven solution
1000+ Customers worldwide

























iOS and Android App
Alerting and Incident Management. Anywhere.
SIGNL4’s intuitive mobile alerting and incident management app for Android and iPhone acts as a single pane of glass for incidents and alerts from multiple sources. The mobile app turns critical events into actionable alerts with visual categories, links, maps, images, videos and much more. It is a unique tool for responding from any place, instantly and in real-time.
Approved
SIGNL4 rates 4-5 stars in app stores and on review sites like Capterra & G2.




Unmatched Reliability
Automated Mobile Alerting
SIGNL4 has been designed for reliable and super-fast alerting via push, text, email and voice calls. Time-based notification profiles, delivery tracking, alert acknowledgements and automated escalations make sure no alert gets missed. SIGNL4 comes with an abundance of features for superior reliability of mobile alerting, including customizable push sounds and mute-override.
Shift and Duty Scheduling
On-Call Management
Ensuring alerts are delivered to the right people at the righ time, SIGNL4 comes with powerful and convenient scheduling of shifts and on-call duty in your browser rendering ‘Excel sheets’ obsolete. Users can also ‘punch in’ directly directly in the the mobile app. A real-time ‘who is on call’ dashboard facilitates anywhere, anytime digital access to on-duty information.
After-business Hours Service Desk
Call Routing
SIGNL4 is your after-hours call routing solution ensuring no important call goes unnoticed. It supports both live voice call routing to staff on duty and a voice mailbox with alerts. With one click you can set up an inbound voice line in the US and over 20 countries worldwide.
Seamless Connectivity
175+ Integrations
SIGNL4 alerting can be integrated into any system via email, webhook, REST API and 2-way connectors and consolidates events and alerts from multiple sources in IT, IoT, manufacturing and more. Over 175 integrations have been tested and verified by us.

“Love SIGNL4. More time with no worries. We are able to ensure that every service request is addressed in a timley manner. Someone is responsible for every service interaction. Nothing slips through.”
“Great product, with even better people behind it!”
“It is a very nice cloud based tool with a lot of functions. Every alert can have its own category for a better overview. Excellent calender function. But the best is the easy to use app.”
Next Steps
Learn more about SIGNL4 and start your free 30-days trial of mobile alerting
What’s new: Insights and Use Cases
RedIron: Unifying Alerts and Notifications in IT
RedIron, a managed services provider and retail integrator, faced challenges with fragmented alert systems using email and SMS.
RedIron needed a modern, reliable solution for unified alerts and notifications that could optimize their incident management process and support team located in the US, Canada, and offshore.
The AI Revolution in Incident Management: Insights from the Frontlines – by Doreen Jacobi
Cofounder Doreen Jacobi spoke with several of our customers about the revolution AI is bringing to incident management. Artificial Intelligence has seamlessly integrated into our daily lives, often in ways we barely notice. But what does that actually mean for...
Derdack Podcast: How SIGNL4 Unifies RedIron’s Monitoring and Notifications
A story of integration, innovation, and efficiency in monitoring and notifications for modern IT operations About In this episode, Todd from RedIron shares insights on how Derdack’s alerting solution SIGNL4 has unified and transformed their IT operations. RedIron, a...
Certified Security
SIGNL4 protects your sensitive and confidential data! Derdack GmbH is a TISAX participant and meets the strictest criteria for information security and data protection.
Why SIGNL4?
SIGNL4 stands out as the ultimate solution for mobile alerting and team mobilization in the event of a critical incident, ensuring rapid response when it matters most. Unlike traditional notification systems, SIGNL4 offers automated, targeted, and persistent alerts that cut through the noise—reaching the right people at the right time via mobile push, SMS, and voice calls. With built-in alert filtering, duty scheduling, acknowledgment tracking, automated escalations, and seamless integrations with IT, IoT, and operational systems, SIGNL4 empowers teams to stay in control, minimize downtime, and enhance operational efficiency. Its intuitive interface, enterprise-grade security, and real-time collaboration features make it the go-to solution for businesses seeking reliable, fast, and actionable alerting and incident response wherever they are.