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BifrostLLM App Platforms & RAGBifrost is an Apache-2.0 AI gateway written in Go. It unifies 20+ providers behind one OpenAI-compatible API with fallbacks, virtual keys, semantic caching, logging and an MCP gateway, run through NPX or Docker.Open sourceSelf-hosted
DatadogMonitoring & ObservabilityDatadog is a SaaS observability and security platform that collects metrics, traces, logs and events through its open-source Agent and 1,000+ integrations, with per-host and per-volume pricing across regional sites.CommercialWeb platformPaid
Elastic CloudSearch EnginesElastic Cloud is Elastic's managed service for Elasticsearch, Kibana and the Search, Observability and Security solutions, available as Hosted deployments on AWS, Azure and Google Cloud or as versionless Serverless projects.CommercialWeb platformPaid
GrafanaMonitoring & ObservabilityGrafana is the open source visualization and alerting server from Grafana Labs. It queries Prometheus, Loki, Elasticsearch, InfluxDB, PostgreSQL and other data sources in place, and runs self-managed on Linux, Windows, macOS, Docker or Kubernetes, or as Grafana Cloud.Open sourceSelf-hostedFreemium
Highlight.ioMonitoring & ObservabilityHighlight.io is an open-source monitoring platform for session replay, error monitoring, logs and traces. LaunchDarkly acquired Highlight in April 2025; the hosted service ended on February 28, 2026, while the repository stays open.Open sourceSelf-hosted
LLM GatewayLLM App Platforms & RAGAGPL-3.0 API gateway for LLMs: one OpenAI-compatible endpoint for many providers, with routing, failover, key management, usage and cost analytics, caching and guardrails. Use the managed cloud or self-host with Docker.Open sourceSelf-hostedFreemium
New RelicMonitoring & ObservabilityNew Relic is a hosted observability platform that collects metrics, events, logs and traces from agents and OpenTelemetry. Pricing is usage-based on data ingest and users or compute, with a free tier of 100 GB per month.CommercialWeb platformFreemium
OneUptimeUptime Monitoring & Status PagesOneUptime is an open-source observability platform from HackerBay, Inc. that combines uptime and infrastructure monitoring, status pages, incident management, on-call paging and OpenTelemetry logs, metrics and traces, as a cloud service or self-hosted.Open sourceSelf-hostedFreemium
OpenObserveMonitoring & ObservabilityOpenObserve (O2) is an AGPL-3.0 observability platform written in Rust for logs, metrics, traces, RUM, dashboards, alerts, pipelines and LLM observability, self-hosted as a single binary or HA cluster, or used as a cloud service.Open sourceSelf-hostedFreemium