{"id":"servercentral-elastalert","name":"elastalert","af_score":32.8,"security_score":44.5,"reliability_score":33.8,"what_it_does":"ElastAlert is an open-source alerting system that matches events from Elasticsearch (and some other sources via custom connectors) against alerting rules, then sends notifications (e.g., email, Slack, webhook) when conditions are met.","best_when":"You already have Elasticsearch data and want rule-based alerting with customizable match logic and notification targets.","avoid_when":"You need a turnkey, fully managed alerting service with enterprise-grade operational guarantees and documented API contracts; or you require strict multi-tenant security boundaries out of the box.","last_evaluated":"2026-04-04T21:33:14.121165+00:00","has_mcp":false,"has_api":false,"auth_methods":["Basic Elasticsearch credentials via username/password (and/or cloud/auth mechanisms depending on deployment)","API key / token authentication for Elasticsearch (commonly supported depending on ES client configuration)"],"has_free_tier":false,"known_gotchas":["ElastAlert is rule/config driven (YAML); agent integration depends on filesystem/config generation rather than calling a stable API.","Operational behavior depends heavily on Elasticsearch query performance and time window settings; tuning mistakes can cause missed/duplicate alerts.","Notification deduplication/throttling behavior is controlled by rule settings; agents must respect those to avoid alert storms."],"error_quality":0.0}