SIGNL4

What SIGNL4 is

SIGNL4 is a cloud-based incident management and alerting platform for teams responding to incidents across their lifecycle. It sends alerts by push notification, text, voice and email, 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 features include targeted mobile alerts, on-call scheduling, team collaboration, escalation tracking and mobile remediation. SIGNL4 supports email, webhooks and REST API, and says it has more than 200 verified and tested third-party integrations. Named integrations include Checkmk, ConnectWise, Icinga, Kaseya, Microsoft Sentinel, Microsoft Teams, PRTG, 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 those connection methods. Paid plans add capabilities such as text and voice alerts, automated escalations, scheduling and audit logs. The 30-day trial provides 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.

Who it suits

SIGNL4 suits teams responsible for mission-critical systems, including IT and OT responders who need alerts, escalation tracking and on-call coordination. Its commercial subscriptions are for businesses and public institutions, while the free Starter plan supports teams of up to five users.

Limits

Starter is free for up to five users and includes push alerts; text and voice alerts are included in Notify & Connect, which costs $9 per user per month billed monthly. The trial provides Maximize features for up to 10 users for 30 days.

Getting started

1. Open the SIGNL4 website and choose the free Starter plan or begin the 30-day trial.
2. Use Starter for up to five users, or trial Maximize features for up to 10 users without a credit card.
3. Connect alert sources using email, webhooks or REST API.
4. Set up team response using the available mobile alerts, duty management and escalation features.
5. Use integrated chat or the online support portal for free support during the trial.

Verdict

Choose SIGNL4 if your organization needs incident alerts, on-call response and escalation handling across mobile and connected systems. Starter covers up to five users with push alerts; teams needing text and voice alerts can consider Notify & Connect at $9 per user per month, while other paid editions add scheduling and operations features.