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SIGNL4
What it is
SIGNL4 is a cloud-based incident management and alerting platform for handling incidents across their lifecycle. It sends push, text, voice, and email alerts with tracking and escalations. Its event processing can filter alert noise, deduplicate repeated signals, and delay non-critical alerts while systems recover automatically. Response features include targeted mobile alerts, on-call scheduling, team collaboration, escalation tracking, and mobile remediation. SIGNL4 supports email, webhooks, and REST API connections, and says it has more than 200 verified and tested third-party integrations. Named examples include Checkmk, ConnectWise, Icinga, Kaseya, Microsoft Sentinel, Microsoft Teams, PRTG, ServiceNow, and Zabbix. The free Starter plan supports up to 5 users and includes push alerts, a native mobile app, ad-hoc duty management, and API connectivity. Paid plans start at $9 a month per user for Notify & Connect, billed monthly. A 30-day trial provides Maximize features for up to 10 users, includes communication costs, and requires no credit card. Free support is available during the trial through chat and the online support portal. Commercial subscriptions are for businesses and public institutions, not private users.
For and against
For
- Sends alerts by push, text, voice, and email.
- Filters noise and deduplicates repeated signals.
- Free Starter plan supports up to 5 users.
- 30-day trial includes Maximize features for up to 10 users.
- Supports email, webhooks, REST API, and over 200 integrations.
Against
- Commercial subscriptions are not offered to private users.
- Starter plan is limited to 5 users.
- Notify & Connect costs $9 a month per user.
The verdict
SIGNL4 combines alert delivery, event filtering, and coordinated response tools for incident teams. Businesses and public institutions can assess the Maximize trial, while private users are outside the stated commercial availability.
Who it suits
SIGNL4 suits business and public-sector teams responsible for mission-critical systems, including IT and OT responders. Its alerting and scheduling features are relevant to teams coordinating on-call incident response.
Plans and prices
Starter
up to 5 users · push alerts · native mobile app · ad-hoc duty management
Read 5 Oct 2026 · signl4.com
Notify & Connect
Starter features · text and voice alerts · persistent notifications · ChatOps
Read 5 Oct 2026 · signl4.com
Optimize
Notify & Connect features · automated escalations · duty and shift scheduling · AI Ops and AI Alerting
Read 5 Oct 2026 · signl4.com
Maximize
Optimize features · live call routing · audit logs · SCIM provisioning
Read 5 Oct 2026 · signl4.com
On the record
- Alerting
- It sends alert notifications by push, text, voice, and email, with tracking and escalations.signl4.com · read 5 Oct 2026
- Commercial availability
- Commercial subscriptions are offered exclusively to businesses and public institutions, not private users.signl4.com · read 5 Oct 2026
- Company
- Derdack says it was founded in 1999 and describes SIGNL4 as its cloud-based SaaS solution.signl4.com · read 5 Oct 2026
- Customer fit
- SIGNL4 describes the trial as built for teams responsible for mission-critical systems and highlights IT and OT response use cases.signl4.com · read 5 Oct 2026
- Event handling
- Its event processing engine filters alert noise, deduplicates repetitive signals, and can delay non-critical alerts for auto-recovery.signl4.com · read 5 Oct 2026
- Examples
- Its listed top integrations include Checkmk, ConnectWise, Icinga, Kaseya, Microsoft Sentinel, Microsoft Teams, PRTG, ServiceNow, and Zabbix.signl4.com · read 5 Oct 2026
- Incident response
- The platform supports targeted mobile alerts, on-call scheduling, team collaboration, escalation tracking, and mobile remediation.signl4.com · read 5 Oct 2026
- Integrations
- SIGNL4 says it has more than 200 verified and tested third-party integrations and supports email, webhooks, and REST API.signl4.com · read 5 Oct 2026
- Product
- SIGNL4 is a cloud-based incident management and alerting platform for the incident lifecycle.signl4.com · read 5 Oct 2026
- Security and compliance
- The Trust Center lists GDPR, ISO/IEC 27001:2022, TISAX, DORA, and EU AI Act compliance topics and provides access to security documentation by request.trust.signl4.com · read 5 Oct 2026
- Trial
- The 30-day free trial includes Maximize features for up to 10 users, requires no credit card, and includes communication costs.signl4.com · read 5 Oct 2026
- Trial support
- Free support is available during the trial through integrated chat and the online support portal.signl4.com · read 5 Oct 2026
