SIGNL4
SIGNL4 is a cloud-based incident management and alerting platform for handling incidents from notification through response.
What SIGNL4 is
SIGNL4 is a cloud-based incident management and alerting platform for handling incidents from notification through response. It sends push, text, voice, and email alerts, with tracking and escalations. Its event-processing engine filters alert noise, deduplicates repeated signals, and can hold non-critical alerts during automatic recovery. Response features include targeted mobile alerts, on-call scheduling, team collaboration, escalation tracking, and mobile remediation. SIGNL4 supports email, webhooks, and REST API, and lists more than 200 third-party integrations, including Checkmk, ConnectWise, Icinga, Kaseya, Microsoft Sentinel, Microsoft Teams, PRTG, ServiceNow, and Zabbix. A free Starter plan supports up to five users. Paid plans begin with Notify & Connect at $9 a month per user, billed monthly. A 30-day trial offers Maximize features for up to 10 users, includes communication costs, and requires no credit card. Trial support is available through integrated chat and the online support portal. Commercial subscriptions are offered to businesses and public institutions, not private users.
Good
- Free Starter plan supports up to five users
- Alerts by push, text, voice, and email
- More than 200 listed third-party integrations
- 30-day trial requires no credit card
Watch out
- Commercial subscriptions exclude private users
- Starter includes push alerts, not text or voice
- Optimize and Maximize monthly billing costs more than annual
Who it suits
SIGNL4 is suited to business and public-sector teams responsible for incident response, including IT and OT teams managing mission-critical systems. It is not offered as a commercial subscription to private users.
Verdict
SIGNL4 brings alerting, event filtering, scheduling, and response coordination together, with a free entry plan and a 30-day trial. Compare the paid plan features and billing terms with the response tools your team needs.
Plans and prices
From SIGNL4's own pricing page, checked 5 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Starter | Free | up to 5 users · push alerts · native mobile app · ad-hoc duty management · email, webhook, REST API |
| Notify & Connect | $9 a month | Starter features · text and voice alerts · persistent notifications · ChatOps · chat and email support · per user; billed monthly |
| Optimize | $15 a month | Notify & Connect features · automated escalations · duty and shift scheduling · AI Ops and AI Alerting · per user/month with annual subscription; $19 per user/month with monthly payment |
| Maximize | $25 a month | Optimize features · live call routing · audit logs · SCIM provisioning · priority support · 99.95% SLA · per user/month with annual subscription; $29 per user/month with monthly payment |
The facts
Each one read from SIGNL4's own pages, with the date it was checked.
What it does
- Alerting
- It sends alert notifications by push, text, voice, and email, with tracking and escalations.checked 5 Oct 2026
- Commercial availability
- Commercial subscriptions are offered exclusively to businesses and public institutions, not private users.checked 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.checked 5 Oct 2026
- Event handling
- Its event processing engine filters alert noise, deduplicates repetitive signals, and can delay non-critical alerts for auto-recovery.checked 5 Oct 2026
- Examples
- Its listed top integrations include Checkmk, ConnectWise, Icinga, Kaseya, Microsoft Sentinel, Microsoft Teams, PRTG, ServiceNow, and Zabbix.checked 5 Oct 2026
- Incident response
- The platform supports targeted mobile alerts, on-call scheduling, team collaboration, escalation tracking, and mobile remediation.checked 5 Oct 2026
- Integrations
- SIGNL4 says it has more than 200 verified and tested third-party integrations and supports email, webhooks, and REST API.checked 5 Oct 2026
- Product
- SIGNL4 is a cloud-based incident management and alerting platform for the incident lifecycle.checked 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.checked 5 Oct 2026
The company
- Company
- Derdack says it was founded in 1999 and describes SIGNL4 as its cloud-based SaaS solution.checked 5 Oct 2026
Money
- Trial
- The 30-day free trial includes Maximize features for up to 10 users, requires no credit card, and includes communication costs.checked 5 Oct 2026
- Trial support
- Free support is available during the trial through integrated chat and the online support portal.checked 5 Oct 2026
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