Alert notification tools in 2026
Push, chat and messaging services that deliver an alert to a phone or a channel. This list has 14 alert notification tools. Of these, 11 are open source, 13 have a free plan and 11 can be self-hosted. Checked by hand on 30 September 2026.
- 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.
- 2
Bark
Open source iOS app for push notifications: send a request to a URL and it arrives as a push on your iPhone, through a server you can self-host.
- 3
Botkube
Kubernetes ChatOps bot that posts cluster events and alerts to Slack, Discord or Mattermost and lets you run kubectl from chat.
- 4
Gotify
Self-hosted server for sending and receiving push messages over a REST API and websocket, with a web UI and an Android client.
- 5
Kubewatch
Kubernetes watcher that reports resource changes in the cluster to Slack, Mattermost and other chat channels or to a webhook.
- 6
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.
- 7
ntfy
HTTP-based pub-sub push service: POST a message to a topic URL and it arrives on phones and desktops through the ntfy apps. Use the public server, a paid plan, or self-host.
- 8
Pocket Alert
Push notifications to an iOS or Android app from a REST API, a webhook with JSON mapping, or integrations such as Grafana, Datadog and Prometheus.
- 9
Prometheus Alertmanager
Receives alerts from Prometheus and compatible systems, then groups, deduplicates, silences and routes them to email, Slack, PagerDuty, webhooks and other receivers.
- 10
prometheus-msteams
Small proxy that receives Alertmanager webhooks and forwards them as formatted cards to Microsoft Teams channels.
- 11
PushBits
Self-hosted relay that delivers push notifications to you through Matrix, with an API similar to Gotify and Pushover.
- 12
Pushover
Push notification service with iOS, Android and desktop apps and a simple API supported by many monitoring tools, including an emergency priority that repeats until acknowledged.
- 13
Shoutrrr
Go library and CLI for sending notifications to services such as Slack, Discord, Telegram, email and Pushover through a single URL format.
- 14
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.
Side by side
| Tool | Pricing | Free plan | Open source | Self-hosted | Mobile push | SMS | Voice calls | Chat apps | HTTP API or webhook ingest | Bypass silent mode | Acknowledgement | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Apprise | Free | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No |
| Bark | Free | Yes | Yes | Yes | Yes | No | No | No | No | Yes | Yes | No |
| Botkube | Free | Yes | Yes | Yes | No | No | No | No | Yes | - | No | No |
| Gotify | Free | Yes | Yes | Yes | Yes | No | No | No | No | Yes | - | No |
| Kubewatch | Free | Yes | Yes | Yes | No | No | No | Yes | Yes | No | No | No |
| Mailrise | Free | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes | No | Yes | No |
| ntfy | Free plan | Public server usable without sign-up | Yes | Yes | Yes | - | Yes | Yes | - | Yes | Yes | - |
| Pocket Alert | Free plan | 50 messages a day, 1 device | No | No | Yes | - | - | - | - | Yes | Yes | - |
| Prometheus Alertmanager | Free | Yes | Yes | Yes | Yes | Yes | - | Yes | Yes | Yes | Yes | No |
| prometheus-msteams | Free | Yes | Yes | Yes | No | No | No | No | Yes | Yes | No | No |
| PushBits | Free | Yes | Yes | Yes | - | No | No | No | Yes | Yes | - | No |
| Pushover | Paid | No | No | No | Yes | No | No | No | No | Yes | Yes | Yes |
| Shoutrrr | Free | Yes | Yes | Yes | Yes | No | No | Yes | Yes | No | - | No |
| SIGNL4 | Free plan | Up to 5 users, push alerts | No | No | Yes | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
Yes: confirmed in the tool's documentation. No: documented as not offered. -: not confirmed. Plans and prices change; check each tool's own site before you decide.
More lists
- Best alert notification tools in 2026 5
- Open source alert notification tools in 2026 11
- Alert notification tools with a free plan in 2026 13
- Self-hosted alert notification tools in 2026 11
- Alerting tools in 2026 92
- Alert routing tools in 2026 9
- On-call tools in 2026 30
- Incident management tools in 2026 20
- Status page tools in 2026 23