https://openobserve.ai/
OpenObserve: Open Source Observability Platform | Logs, Metrics & Traces
open source observabilitylogs
https://www.evidentlyai.com/evidently-oss
Evidently - Open-Source ML Monitoring and LLM Observability
Evidently is an open-source tool to evaluate, test, and monitor AI-powered systems. From tabular data to NLP and LLM. For data scientists, AI, and ML engineers.
open sourceml monitoringllm
https://langfuse.com/docs/observability/overview
LLM Observability & Application Tracing (Open Source) - Langfuse
Open source application tracing and observability for LLM apps. Capture traces, monitor latency, track costs, and debug issues across OpenAI, LangChain,...
llm observabilityopen source
https://clickhouse.com/clickstack
ClickStack: High-Performance Open Source Observability | Logs, Metrics, Traces with ClickHouse
ClickStack is a high-performance observability stack powered by ClickHouse. Unify logs, metrics, and traces with 10-100x cost savings. Get started today!
high performance opensource
https://thenewstack.io/start-small-and-go-big-with-open-source-gonzo-for-observability/
Start Small and Go Big With Open Source Gonzo for Observability - The New Stack
start smallgo bigopen source
https://madewithreactjs.com/hyperdx
HyperDX - Open-source Observability Platform - Made with React.js
Nov 11, 2025 - Open-source Observability Platform
open source observabilitymade
https://oneuptime.com/
OneUptime | The Open-Source Observability Platform
The open-source observability platform. Infrastructure monitoring, incident management, status pages, and APM — unified and self-hostable.
open source observability
https://www.perl.com/article/slapbirdapm-a-free-and-open-source-observability-tool-for-perl/
SlapbirdAPM, a Free and Open-Source Observability Tool for Perl Web Applications
SlapbirdAPM is a free and open-source observability platform for Perl web applications, this post covers how to use it with Plack applications.
open source observabilityfree
https://langfuse.com/integrations/gateways/litellm
Open Source Observability for LiteLLM Proxy - Langfuse
open source observability