{"data":{"slug":"highlight-io","name":"Highlight.io","tagline":"Open-source session replay and monitoring","category":"observability","categoryName":"Observability","url":"https://highlight.io","github":"https://github.com/highlight/highlight","pricing":"freemium","hook":"Highlight.io is full-stack observability you can self-host.","whatsGood":"Session replay shows exactly what happened. Error tracking with context. Log aggregation included. Open-source means self-hosting is possible.","theCatch":"Newer than established players. Self-hosting requires significant infrastructure. Some features are less mature.","verdict":"Open-source alternative covering replay, errors, and logs.","addedAt":"2026-08-19","featured":false,"domain":"Observability","subSpecialty":"Error Tracking","capabilities":["replay","errors"],"surfaces":["Self-host","Hosted"],"ecosystem":["Multi-platform"],"licenseModel":"Freemium","githubStars":9373},"related":[{"slug":"sentry","name":"Sentry","tagline":"Error tracking that actually helps"},{"slug":"grafana","name":"Grafana","tagline":"Dashboards for everything observable"},{"slug":"prometheus","name":"Prometheus","tagline":"Time-series metrics for cloud-native"},{"slug":"opentelemetry","name":"OpenTelemetry","tagline":"Vendor-neutral observability framework"},{"slug":"datadog","name":"Datadog","tagline":"Unified observability platform"}],"links":{"self":"/api/gems/highlight-io","html":"/gems/highlight-io","markdown":"/gems/highlight-io.md","category":"/api/gems?category=observability","categoryPage":"/stacks/observability"}}