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signoz
SigNoz is an open-source observability platform native to OpenTelemetry with logs, traces and metrics in a single application. An open-source alternative to DataDog, NewRelic, etc. 🔥 🖥. 👉 Open source Application Performance Monitoring (APM) & Observability tool
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
SigNoz is full-stack open-source application monitoring and observability tool which can be a great DataDog alternative. It can be hosted within your infra, and as such, you don't need to send your data to a third-party vendor. It uses distributed tracing to help developers gauge the performance of their application in production. It captures both metrics and traces with log management currently in the product roadmap. A few things that SigNoz can help you with as a DataDog alternative are:
Prometheus can serve as a DataDog alternative if you are looking to track only metrics for your applications. It was initially developed at SoundCloud in 2012 before being released as an open-source project. It was the second project to graduate from CNCF after Kubernetes. If you want to opt for an open-source tool for metrics monitoring, then Prometheus can be a good option.