Skip to content
SPECIFICTION
Get listed

SIGNL4

signl4.com

From $9/mo Free plan WebiOSAndroidAPI
Visit signl4.com
Spec score 7.8 #14 of 23 in IT Alerting Software

What it is

SIGNL4 is a cloud-based incident management and alerting platform for teams handling incidents through their lifecycle. It sends push, text, voice and email notifications with tracking and escalations. Its event processing engine filters alert noise, deduplicates repeated signals and can delay non-critical alerts while systems recover automatically. Response tools include targeted mobile alerts, on-call scheduling, team collaboration, escalation tracking and mobile remediation. SIGNL4 supports email, webhooks and REST API, and the maker says it has more than 200 verified third-party integrations, including Checkmk, Icinga, Microsoft Teams, ServiceNow and Zabbix. The free Starter plan supports up to five users and includes push alerts, a native mobile app, ad-hoc duty management and connectivity through email, webhook and REST API. Notify & Connect costs $9 a month per user, billed monthly. A 30-day trial gives up to 10 users Maximize features, includes communication costs and requires no credit card. Commercial subscriptions are for businesses and public institutions, not private users.

Spec sheet

Product
SIGNL4 is a cloud-based incident management and alerting platform for the incident lifecycle.Read 5 Oct 2026 · signl4.com
Trial
The 30-day free trial includes Maximize features for up to 10 users, requires no credit card, and includes communication costs.Read 5 Oct 2026 · signl4.com
Integrations
SIGNL4 says it has more than 200 verified and tested third-party integrations and supports email, webhooks, and REST API.Read 5 Oct 2026 · signl4.com
Company
Derdack says it was founded in 1999 and describes SIGNL4 as its cloud-based SaaS solution.Read 5 Oct 2026 · signl4.com
Alerting
It sends alert notifications by push, text, voice, and email, with tracking and escalations.Read 5 Oct 2026 · signl4.com
Commercial availability
Commercial subscriptions are offered exclusively to businesses and public institutions, not private users.Read 5 Oct 2026 · signl4.com
Customer fit
SIGNL4 describes the trial as built for teams responsible for mission-critical systems and highlights IT and OT response use cases.Read 5 Oct 2026 · signl4.com
Event handling
Its event processing engine filters alert noise, deduplicates repetitive signals, and can delay non-critical alerts for auto-recovery.Read 5 Oct 2026 · signl4.com
Examples
Its listed top integrations include Checkmk, ConnectWise, Icinga, Kaseya, Microsoft Sentinel, Microsoft Teams, PRTG, ServiceNow, and Zabbix.Read 5 Oct 2026 · signl4.com
Incident response
The platform supports targeted mobile alerts, on-call scheduling, team collaboration, escalation tracking, and mobile remediation.Read 5 Oct 2026 · signl4.com
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.Read 5 Oct 2026 · trust.signl4.com
Trial support
Free support is available during the trial through integrated chat and the online support portal.Read 5 Oct 2026 · signl4.com

Plans and prices

Starter Free up to 5 users · push alerts · native mobile app · ad-hoc duty management · email, webhook, REST API Read 5 Oct 2026 · signl4.com
Notify & Connect $9 a month per user; billed monthly Starter features · text and voice alerts · persistent notifications · ChatOps · chat and email support Read 5 Oct 2026 · signl4.com
Optimize $15 a month per user/month with annual subscription; $19 per user/month with monthly payment Notify & Connect features · automated escalations · duty and shift scheduling · AI Ops and AI Alerting Read 5 Oct 2026 · signl4.com
Maximize $25 a month per user/month with annual subscription; $29 per user/month with monthly payment Optimize features · live call routing · audit logs · SCIM provisioning · priority support · 99.95% SLA Read 5 Oct 2026 · signl4.com

Every SIGNL4 plan and price →

Strong points and limits

Strong points

  • Free Starter plan supports up to five users.
  • Alerts arrive by push, text, voice and email.
  • Includes on-call scheduling and escalation tracking.
  • Supports email, webhooks and REST API.
  • 30-day trial includes Maximize features for up to 10 users.

Limits

  • Commercial subscriptions exclude private users.
  • Notify & Connect is $9 a month per user.
  • Higher-tier annual prices differ from monthly-payment prices.

Who it suits

SIGNL4 is aimed at teams responsible for mission-critical systems, including IT and OT response teams. Its commercial subscriptions are offered to businesses and public institutions, not private users.

Verdict

SIGNL4 brings alert delivery, event filtering and response coordination into a cloud service, with a free tier and a 30-day trial. Check the plan terms for user limits and whether the listed escalation, scheduling and support features fit the team’s needs.

Where Specifiction places it

Alternatives to SIGNL4All alternatives →