SIGNL4
An alert management platform that sends critical notifications to on-call teams and automatically manages incident response
- Vendor
- Derdack GmbH
- Also known as
- signl4
Available worldwide · Popular in: US, DE
What is SIGNL4?
A cloud-based alerting service that delivers critical notifications via push, SMS, and voice to the right on-call team members, automates escalations and acknowledgments, and integrates with 200+ monitoring and infrastructure tools to ensure no critical alerts go unaddressed.
SIGNL4 pricing
Plans, per-tier features and add-ons, dated and linked to live pricing. Pricing changes often; always verify at source before you rely on it.
From $9/user/mo. Free tier for up to 5 users.
Starter
FreeIdeal for Exploring and Basic Scenarios
- Push Alerts
- Native mobile App
- Ad-hoc Duty Management
- 'Who is on call' dashboard
- Acknowledgements
- Email, Webhook, REST API
- Workflows
- Teams & Slack Integration
- SSO via 3rd party
- Unlimited Teams
Notify & Connect
Essential Features - Reliable Entry Solution for Alerting
- Text & Voice Alert included
- Persistent notifications
- ChatOps
- Geolocations & Maps
- Manual Alerts from web browser or mobile app
- User Roles
- Chat & Email Support
Optimize
Reliable Alerting with Escalations and Oncall/Duty Scheduling
- Automated Escalations
- Flood protection
- Duty & Shift Scheduling with Export
- Post-shift reports
- Remote Actions
- Rules with logical conditions
- Heartbeat and Website Monitors
- 2-way 3rd party connectors
- AI Ops & AI Alerting
Maximize
Full Features incl. Call Routing and SLAs
- Live Call Routing
- Voice mailbox with alerts
- Public 'Who is on call' Dashboard
- Audit Logs
- Custom Data Retention
- User Provisioning via SCIM
- Priority Support
- SLA 99.95%
Add-ons
- Stakeholder Notification$3/stakeholder/mo + $30/stakeholder/yr
- Dedicated Phone Number$10/mo + $110/yr
What SIGNL4 does
The capabilities that matter for on call management, normalised so it lines up with every alternative. “-” means we haven't confirmed it, not that it's missing.
- Deployment model
- Saas
- SMS alerting
- ✓
- Voice call alerting
- ✓
- Mobile app push
- ✓
- Escalation policies
- ✓
- Shift schedule management
- ✓
- Holiday vacation overrides
- -
- Alert routing rules
- ✓
- Slack teams integration
- ✓
- Incident response module
- ✓
- SOC2 type ii
- -
- ISO 27001
- ✓
- Pricing model
- Freemium
Platform & deployment
Independently observed- iOS
- Web
- Android
- Cloud / SaaS
Integrations (9)
Independently observed- Slack⇄•
- Microsoft Teams⇄•
- Azure Sentinel⇄•
- Checkmk⇄•
- PRTG⇄•
- Zabbix⇄•
- Splunk⇄•
- InfluxDB→•
- ConnectWise⇄•
Security & compliance
Independently observed- ISO/IEC 27001:2022active
- TISAXactive
SIGNL4 alternatives
Other on call management we track, ranked by the same independent score.
- ilertAI-powered incident management platform that routes alerts to teams and automates incident responsemedium · 74%
- AlertOpsBundled incident management and on-call platform for enterpriseslow · 15%
- Grafana OnCallA Grafana dashboard template for monitoring Consumer Price Index datalow · 2%
- xMattersAI-powered incident management platform that automates alerts and incident responsemedium · 71%
Compare SIGNL4
Side by side against other on call management, attribute by attribute, with a source on every value.
The vioscaleAI score: one lens on the evidence
Not user reviews and not a paid placement: a confidence-weighted blend of the independent signals below (adoption, activity, security posture, and more), which you can sort and re-weight yourself. Vendors can correct their listing but can never move their rank, and stars are weighted low as a vanity metric. It is one way to read the evidence for SIGNL4, not the verdict.
| Signal | Score | Weight | Contribution | Evidence |
|---|---|---|---|---|
| Reliability | 48 | 0.16 | 7.5 | ✓ |
| Pricing transparency | 100 | 0.06 | 6.3 | ✓ |
| Capabilities | 96 | 0.05 | 4.9 | ✓ |
| Security posture | 30 | 0.12 | 3.5 | ✓ |
| Price level | 80 | 0.04 | 3.4 | ✓ |
| Integrations | 66 | 0.05 | 3.2 | ✓ |
Computed . Re-weight it by intent, or see the full method.
All data & sourcesshow ↓
Every value we hold, with its source, retrieval date, and confidence. This is the evidence behind the score: don't trust it, verify it.
Features
| Attribute | Value | Evidence |
|---|---|---|
| Capabilities | Iso 27001: Yes · Sms alerting: Yes · Pricing model: freemium · Mobile app push: Yes · Deployment model: saas · Alert routing rules: Yes | mediumsource · 2026-10-06 · 60% |
Integrations
| Attribute | Value | Evidence |
|---|---|---|
| Count | 200 | mediumsource · 2026-10-06 · 60% |
Market
| Attribute | Value | Evidence |
|---|---|---|
| Availability | HqCountry: DE · PrimaryMarkets: … · AvailabilityScope: global · AvailableCountries: … · NotAvailableCountries: … | highsource · 2026-10-06 · 75% |
Pricing
Reliability
| Attribute | Value | Evidence |
|---|---|---|
| Sla pct | 99.95 | mediumsource · 2026-10-06 · 60% |
Security
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