Features gated by price are 2015 thinking. Everyone gets the same feature set; you pay for monitor count.
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All 6 check types (HTTP/S, TCP, SSL, ping, port, keyword)
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1-minute minimum interval on paid plans
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Email + webhook alerts (unlimited)
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Public status pages (custom domain)
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Maintenance windows + incident pages
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SSRF-hardened DNS (cannot be weaponised against your VPC)
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OpenAPI 3 spec · typed SDK generation
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Prometheus metrics + Grafana dashboards
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Daily Postgres backups with 7-day retention
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Audit log for every mutation
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BullMQ retries + 7-day DLQ for failed alerts
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Correlation IDs (scheduler → worker → alert)