Go to Settings → Alerts → Channels → Add channel. Channels beyond e-mail are part of Pro.
Slack
In Slack: Apps → Incoming Webhooks → Add to Slack, choose the channel and copy the URL (starts with https://hooks.slack.com/). Paste it as the channel address.
Discord
Channel settings → Integrations → Webhooks → New webhook → copy the URL.
Microsoft Teams
In the channel: Workflows → "Post to a channel when a webhook request is received" → copy the URL.
SMS
Enter the mobile number in international format, e.g. +46701234567. SMS is best reserved for the "if nobody reacts" step.
Telegram
Start a chat with the Ravnsight bot (the name is shown in the form), send /start, and enter your chat id (ask @userinfobot).
Webhook
We POST JSON to your URL and sign every request: X-Ravnsight-Signature: sha256=HMAC(timestamp.body, secret) with X-Ravnsight-Timestamp. Works with Zapier, Make, n8n or your own code.
Use Send test on any channel to see exactly what an alert looks like.