Best alerting tools in 2026
Get the right person to the problem: routing, notifications, on-call, incident response and status pages. This list has the top tools of each alerting category, ranked by a published score. Of these, 9 are open source, 19 have a free plan and 9 can be self-hosted. Checked by hand on 30 September 2026.
How this list is ranked
Each active tool gets a score out of 100. Archived, end-of-sale and maintenance-only tools are left out.
- Capabilities: up to 75 points for the share of the category checklist that the tool's own documentation confirms. A tool meeting 8 of 10 items gets 60.
- Free to start: 15 points for a free plan or a free edition.
- Open or self-hostable: 10 points if it is open source or can be self-hosted.
Each category has a fixed checklist of capabilities (shown in the table below and on every tool page). An item counts only when the tool's own documentation confirms it; anything we could not confirm counts as not met. Checklists differ by category, so this list shows the top three of each category, each ranked against its own checklist. How long a tool has existed is deliberately not scored, so a new tool is not ranked below an older one for being new. Tools with the same score share a rank (shown as =), are listed A to Z within it, and the list never cuts between them. Nobody pays for a position.
Alert routing and correlation
The top of 9 alert routing tools, ranked on the alert routing checklist. See the full ranking.
- 1
Keep
Open source alert management tool that pulls alerts from many monitoring sources, deduplicates and correlates them, and runs workflows on them. Acquired by Elastic in 2025.
93 9 of 10 capabilities (68), free 15, open 10 - =2
Alerta
Self-hosted alert console that collects alerts from Prometheus, Nagios, Zabbix, CloudWatch and others, deduplicates and correlates them, and shows them in one web UI with an API and CLI.
85 8 of 10 capabilities (60), free 15, open 10 - =2
Prometheus Alertmanager
Receives alerts from Prometheus and compatible systems, then groups, deduplicates, silences and routes them to email, Slack, PagerDuty, webhooks and other receivers.
85 8 of 10 capabilities (60), free 15, open 10
Notification delivery
The top of 14 notifications tools, ranked on the notifications checklist. See the full ranking.
- 1
Apprise
Python library, CLI and API server that sends one notification to many services such as Telegram, Discord, Slack, email and SMS gateways using URL-style targets.
91 7 of 8 capabilities (66), free 15, open 10 - 2
SIGNL4
Mobile alerting app that delivers alerts to the team on duty by push, SMS and voice call, with acknowledgements, duty scheduling and many monitoring integrations.
90 8 of 8 capabilities (75), free 15, open 0 - =3
Mailrise
SMTP gateway that turns incoming emails into Apprise notifications, so devices that can only send email alerts can reach push, chat and other services.
81 6 of 8 capabilities (56), free 15, open 10 - =3
Prometheus Alertmanager
Receives alerts from Prometheus and compatible systems, then groups, deduplicates, silences and routes them to email, Slack, PagerDuty, webhooks and other receivers.
81 6 of 8 capabilities (56), free 15, open 10
On-call and alert escalation
The top of 30 on-call tools, ranked on the on-call checklist. See the full ranking.
- 1
GoAlert
Open source on-call scheduling, escalation and paging service built at Target, with SMS and voice through Twilio, a web UI and a GraphQL API.
94 11 of 12 capabilities (69), free 15, open 10 - =2
AlertOps
Alert management and on-call service that runs incoming alerts through schedules and escalation policies and notifies people by voice, SMS, email and push, with workflow automation on higher plans.
90 12 of 12 capabilities (75), free 15, open 0 - =2
Better Stack
Observability suite that pairs uptime checks, logs and metrics with on-call schedules, escalation policies, phone and SMS alerts and hosted status pages.
90 12 of 12 capabilities (75), free 15, open 0 - =2
Grafana Cloud IRM
Grafana Cloud's incident response and on-call service: schedules, escalation chains, alert grouping, Slack incident channels and a mobile app, next to Grafana alerting.
90 12 of 12 capabilities (75), free 15, open 0 - =2
incident.io On-call
On-call module of incident.io: schedules, escalation paths, alert routing and a mobile app for paging, feeding straight into incident.io incidents.
90 12 of 12 capabilities (75), free 15, open 0 - =2
Jira Service Management
Atlassian's service desk product. It now holds the alerting, on-call schedule and escalation features moved over from Opsgenie, next to tickets and incidents.
90 12 of 12 capabilities (75), free 15, open 0
Incident management
The top of 20 incident management tools, ranked on the incident management checklist. See the full ranking.
- 1
Incident Bot
Self-hosted Slack or Matrix bot for incident response: opens channels, tracks severity, status and roles, posts a digest and builds postmortem documents.
93 9 of 10 capabilities (68), free 15, open 10 - =2
FireHydrant
Incident management platform with runbooks, Slack and Teams incident channels, retrospectives and status pages. Bought Blameless in 2024 and agreed to join Freshworks in December 2025.
90 10 of 10 capabilities (75), free 15, open 0 - =2
incident.io
Incident management run from Slack or Microsoft Teams: declares incidents, assigns roles, keeps timelines, automates workflows and drafts postmortems, with status pages and on-call.
90 10 of 10 capabilities (75), free 15, open 0
Status pages
The top of 23 status pages tools, ranked on the status pages checklist. See the full ranking.
- =1
Atlassian Statuspage
Hosted public, private and audience-specific status pages with incident and maintenance updates, component status and email, SMS and webhook subscriptions.
90 10 of 10 capabilities (75), free 15, open 0 - =1
PingPong
Hosted status pages with uptime checks and incident updates, and notifications to subscribers by email, Slack, SMS, Discord and other channels.
90 10 of 10 capabilities (75), free 15, open 0 - 3
OpenStatus
Open source status pages and multi-region uptime monitoring, available as a hosted service or self-hosted.
85 8 of 10 capabilities (60), free 15, open 10
Side by side
| Tool | Pricing | Free plan | Open source | Self-hosted |
|---|---|---|---|---|
| Keep | Free plan | Yes | Yes | Yes |
| Alerta | Free | Yes | Yes | Yes |
| Prometheus Alertmanager | Free | Yes | Yes | Yes |
| Apprise | Free | Yes | Yes | Yes |
| SIGNL4 | Free plan | Up to 5 users, push alerts | No | No |
| Mailrise | Free | Yes | Yes | Yes |
| Prometheus Alertmanager | Free | Yes | Yes | Yes |
| GoAlert | Free | Yes | Yes | Yes |
| AlertOps | Free plan | Up to 5 users, basic alert routing | No | No |
| Better Stack | Free plan | 10 monitors and heartbeats, 1 status page | No | No |
| Grafana Cloud IRM | Free plan | 3 active IRM users per month | No | No |
| incident.io On-call | Free plan | Basic plan: single-team on-call | No | No |
| Jira Service Management | Free plan | Up to 3 agents | No | No |
| Incident Bot | Free | Yes | Yes | Yes |
| FireHydrant | Free plan | Up to 10 responders, 1 public status page | No | No |
| incident.io | Free plan | Basic plan: Slack/Teams incidents, status page | No | No |
| Atlassian Statuspage | Free plan | 100 subscribers, 25 components, 2 team members | No | No |
| PingPong | Free plan | Yes | No | No |
| OpenStatus | Free plan | 1 monitor, 1 status page with 3 components | Yes | Yes |
Plans and prices change; check each tool's own site before you decide.