# SIGNL4 Reviews 2026. Verified Reviews, Pros & Cons | Capterra

> Is SIGNL4 the right Incident Management 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

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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/)

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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

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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!

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