# SIGNL4 Reviews 2026. Verified Reviews, Pros & Cons | Capterra > Is SIGNL4 the right Emergency Notification solution for you? Explore 11 verified user reviews from people in industries like yours to make a confident choice. Source: https://www.capterra.com/p/173086/SIGNL4/reviews --- SIGNL4 4.9 (11) Provider data verified by our Software Research team, and reviews moderated by our Reviews Verification team. [Learn more](https://www.capterra.com/our-story/) * * * Last updated March 13th, 2026 # Reviews of SIGNL4 Ease of use 4.7 Customer Service 5.0 ## Showing most helpful reviews Showing 1-11 of 11 Reviews Sort by: Most Helpful Rating Company Size Reviewer's Role Length of Use Frequency of Use Lars-Thorsten S. Founder Information Technology and Services Used the software for: 1-2 years ### "Easy Signalling for small company with IT services & operations" September 24, 2020 5.0 It is easy to use and never have any disadvantages or service issues during the whole lifetime Pros It was easy to install the software with icinga/nagios and took only 2 hours. Flexibility of service configuration and ease of use API for custom scripts. Cons Sometimes it signales to fast if we forgot to disable the monitoring for maintenance ;-) Alternatives considered [absence.io](https://www.capterra.com/p/153192/absence-io/)[PagerDuty](https://www.capterra.com/p/125693/PagerDuty/)[TigerConnect Physican Scheduling](https://www.capterra.com/p/13283/Call-Scheduler/) Reason for choosing SIGNL4 The alerting combined with on call / shift planning was the reason why we chose signl4. Others were not able to deliver this combination and we would use 2 solutions instead of one with signl4 Switched from [Twilio](https://www.capterra.com/p/180158/Twilio-Communications-Platform/) Flexibility and advanced possibilities Review Source Response from Derdack September 29, 2020 Thank you for your great review :) GV Georg V. Managing director / Lead DEV Telecommunications Used the software for: Less than 6 months ### "SIGNL4: Highly recommended!" March 5, 2021 5.0 We are in the active in the wide area of security solutions and SIGNL4 is the perfect extension for our applications! Pros Very well designed and very reliable. Very flexible. A very wide range of integrations and implementations are possible. Excellent Ui and UX. Excellent support! Cons We could not identify any cons and neither experienced any problems. Alternatives considered [Pushover](https://www.capterra.com/p/163457/Pushover/) Reason for choosing SIGNL4 SIGNL is more powerful / more features. Feedback from our customers is great! Switched from [Pushover](https://www.capterra.com/p/163457/Pushover/) SIGNL4 has much more features and potential and is conform to DSGVO. Ui / Ux on iOS and Android is superb. Review Source Response from Derdack March 11, 2021 Thanks, Georg, for this wonderful review! CT Cherie T. Coordinator Utilities Used the software for: 2+ years ### "Signl4" September 23, 2020 4.0 Easy to use and does what it needs to do. Pros Was the only app available that worked well with IPhone. All other apps were designed for Microsoft products Cons At first you had to confirm and resolve each alarm one by one. That has been changed, works great now. Review Source Response from Derdack September 28, 2020 We are incredibly happy to keep you happy using SIGNL4 :) FPG Fr. Paul G. Pastor Religious Institutions Used the software for: Less than 6 months ### "The App we've been searching for!" January 3, 2020 5.0 Using for emergency calls in a church. Team members love it. I love it. Pros I have been looking for an app like this for over 2 years! Finally, an emergency alert app that gives persistent notifications, and can work with iOS to even alert you when you have Do Not Disturb enabled. Since this app allows a variety of choices for the persistent alert, including a phone call from a consistent phone number, I can set the SIGNL4 phone number as a favorite in my contacts, and then my alert comes through even if I set the phone to DND (and allow favorites in the DND settings). This allows me to sleep without interruption unless there is a true emergency! This app does so much more also, scheduling team members, making sure someone is always on duty, and even making provision for unanswered alerts to be escalated to a manager after a set time frame. We use it at our Church for an emergency. What I really love is that a parishioner calls in to our church phone system and leaves a voicemail in our emergency voicemail box, then my phone emails the voicemail to SIGNL4 app and after the alert, there is the voicemail accessible by a PLAY button within the app! Thank you SIGNL4, you have thought of everything! Cons Have not found anything yet that we do not like... Seems like they've thought of everything. Reason for choosing SIGNL4 Can receive persistent alerts even while DND is on using iOS. Review Source Response from Derdack February 6, 2020 We love your review! Thank you. FS Frank S. Teamleader Datacenter Management Transportation/Trucking/Railroad Used the software for: 2+ years ### "Absolutely reliable!" September 7, 2020 5.0 We wanted to replace the alarm with our old city call devices. This was no longer up-to-date and the reliability was not always given. With Signl4 we no longer have to hand over hotline cell phones and city call devices. The active hotliner is automatically put into service. The planning of the hotliner has become much easier. Thanks to the hotline overview, it is also more manageable. Pros The high reliability of the software is unique! We searched for a comparable solution for a long time! The solution is very easy to implement and use! Suggestions for improvement are implemented quickly! Cons I think everything ist perfect for us! On this time i would not change something! Review Source Response from Derdack September 28, 2020 Wonderful, we are delighted to see you this happy with SIGNL4 :) JJ Jesper J. Consultant Information Technology and Services Used the software for: 6-12 months ### "Great product, with even better people behind it" September 28, 2020 5.0 We have worked with the people behind SIGNL4 for years, using Derdack Enterprise Alert before. We always have a good dialogue with them, and they really listen to our needs. They respond quickly if we see some issues, and fix them right away. Pros It's a cloud service, with no need for servers and software installed. Perfect for our needs. The support is excellent, and when we first engaged with SIGNL4 they quickly developed the features we needed. Cons Creating schedules in the app is probably the only thing we miss. Reason for choosing SIGNL4 Pricing and customer connection - we didn't get any attention other places. Review Source Response from Derdack October 13, 2020 Thanks Jesper. Always a pleasure to work with you :) JL Jens L. IT-Technician Education Management Used the software for: Less than 6 months ### "Get alerts when issues arise, not when people gets frustrated and call you." September 23, 2020 5.0 Very easy to get startet: create account, install app on phone and then just feed email adress to anything that should be able to send an alert. On a side note, app has a WAF score of -1, forgot to warn her before the first alarm came in the middle of the night... Pros It keeps alerting until someone on your team acknowledges. Push, phonecall or text, your choise. It integrates well with other systems. Just send an email or do a http POST to raise an alert. There is even support for attachments in the alert, so if you need to send a picturein the alert, its possible. Their support is super helpfull. Cons I am missing a feature, heartbeat. It would be awesome to have: miss 3 heartbeats from a device and raise an alert. Should mention that they added it as a feature request, so maybe at some point. Review Source Response from Derdack October 8, 2020 Thanks a lot, Jens. Sorry about the WAF score, we should put a sticker on the app to keep all wives happy ;) MS Michael S. COO Consumer Goods Used the software for: 1-2 years ### "Amazing Software" September 4, 2020 5.0 Ease of use and integration is top notch Pros Literally has saved us countless hours managing alerts from disparate systems Cons Nothing, it's amazing. Absolutely a life saver in the IT world. Review Source Response from Derdack September 28, 2020 Thank you so much. Great to see which impact SIGNL4 makes for you :) ZZ Zbigniew Z. IT Administrator Team Leader Retail Used the software for: 6-12 months ### "Great app form mobile alerting" February 4, 2020 5.0 With this system we have very good mobile alerting with manager escalation, time scheduling and auto calling when analyst don't confirm alert. Pros Great way to integrate with monitoring software, easy to use, shift scheduling, can create teams, manager escalation Cons Didn't find any urgent thing to mention. Reason for choosing SIGNL4 Functionality, easy to setup, price. Review Source Response from Derdack February 6, 2020 Thanks for your awesome feedback. We'll keep improving! CA Christian A. Developer Internet Used the software for: Less than 6 months ### "Great for server monitoring" September 23, 2020 5.0 Positive - everything just worked. Pros I mostly liked the feature of push and call service. We were easily connected with our Zabbix and were ready to receive calls. Cons Liked everything - and all features that were missing - the great team from SIGNL4 have implemented it after we reached out to them. Review Source Response from Derdack October 7, 2020 Thank you for your great review :) ZB Zlatko B. Technical Account Manager Computer Software Used the software for: 1-2 years ### "Top Produkt" July 30, 2021 5.0 Tolles Produkt mit einfachen Lizenzierungsmodell. Pros Top Produkt für 24x7 Alarmierung, ist sehr einfach zu Konfigurieren und funktioniert zuverlässig! Cons bisher keine negativen Erfahrungen mit dem Produkt. Wenn zentrale Steuerung der Benutzer Einstellungen möglich wäre dann wäre das Perfekt :-) Review Source Response from Derdack August 10, 2021 Thank you for this wonderful review! Talk to a Capterra advisor for free and get results within 15 minutes.