LogRocket and Datadog RUM both meter by session count, so a single viral landing page or bot-driven traffic spike can burn through the monthly session quota and trigger overage billing before anyone opens a dashboard. Datadog compounds this by billing RUM ingestion separately from the linked APM traces, and its default retention window requires a paid add-on to hold session data past 15 days. Self-hosting SigNoz or HyperDX puts session replay events, JS stack traces, and Core Web Vitals in the same ClickHouse instance already used for backend traces, so one OpenTelemetry Collector pipeline replaces separate RUM and APM billing lines. Temps goes further by shipping replay, error tracking, and deployment hosting in a single Rust binary, while Grafana Faro streams frontend telemetry straight into a self-hosted Loki/Tempo stack — both remove the per-GB replay-asset and per-session fees a SaaS RUM vendor charges.
| Name | Main Category | Sub-Category | Target Alternative | Free Tier Summary | Self-Hostable? | Short Description | Primary Link |
|---|---|---|---|---|---|---|---|
HyperDX | Product Analytics & Monitoring | Unified Observability & Front-End RUM (ClickStack) | Datadog / New Relic / LogRocket (RUM & Session Replay) | 100% Free - Self-Hosted (MIT-licensed UI, Apache 2.0 collector; runs on your own ClickHouse) | Yes - Docker | ClickHouse-backed observability platform now maintained by ClickHouse (as part of ClickStack) that correlates session replays, logs, traces, metrics, and Core Web Vitals into one searchable timeline. Deploys via Docker Compose and runs directly on top of your own ClickHouse cluster. | |
Grafana Faro | Product Analytics & Monitoring | Frontend RUM Web SDK | LogRocket / Datadog RUM | 100% Free - Self-Hosted SDK (Apache 2.0; requires a self-hosted Grafana Alloy/Loki/Tempo backend) | Yes - Docker | Lightweight, framework-agnostic browser SDK that captures Core Web Vitals, JS exceptions, and session traces, exporting via OpenTelemetry to a self-hosted Grafana Alloy collector backed by Loki and Tempo. Correlates frontend RUM signals directly with existing backend traces instead of a separate vendor dashboard. | |
Temps | Product Analytics & Monitoring | All-in-One PaaS & Bundled Observability (Replay, Errors, Analytics) | Sentry / LogRocket / Datadog RUM / PostHog | 100% Free - Self-Hosted (Apache 2.0, no session caps, no per-event/seat fees) | Yes - Binary | Self-hosted PaaS and deployment platform compiled as a single Rust binary that bundles Sentry-compatible error tracking, rrweb-based session replay, Web Vitals analytics, and OpenTelemetry ingestion alongside app hosting. Tags error reports directly with the deployment SHA that introduced them, keeping all telemetry on your own VPS with no per-event pricing. | |
OpenReplay | Product Analytics & Monitoring | Session Replay & Product Analytics | LogRocket / Datadog RUM | Free - Self-Hosted (up to 50K sessions/mo on OSS tier; AGPLv3 core, EE features separately licensed) | Yes - Docker | Privacy-focused session replay and frontend performance monitoring that captures DOM mutations, console logs, network requests, and JS errors with source-mapped stack traces. Self-hosts via its own installer (Docker or Kubernetes) and caps free usage at 50K sessions/month before requiring the paid Enterprise self-hosted tier. | |
SigNoz | Product Analytics & Monitoring | Full-Stack APM & Frontend RUM (OpenTelemetry) | Datadog / New Relic / LogRocket (RUM & Session Replay) | 100% Free - Self-Hosted Community Edition (MIT Core, no host/data limits; SAML/OIDC SSO gated to Enterprise) | Yes - Docker & Kubernetes (Helm) | OpenTelemetry-native APM and observability platform backed by ClickHouse that unifies traces, metrics, logs, and frontend RUM data (including Core Web Vitals and JavaScript error tracking) in one UI. Deploys via Docker Compose or Helm, providing Datadog-style flamegraphs and service maps with no per-host fees or ingestion caps. |
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