Open-source Blackfire alternatives

SigNoz is an observability platform, open source and built on OpenTelemetry. It aims to replace a fragmented monitoring stack with a single place for logs, metrics, traces, alerts, exceptions and dashboards, and it presents itself as useful for both engineering teams and their AI agents.

The APM view follows how each service performs, covering latency, error rate, throughput, Apdex, the busiest endpoints, and calls to databases and external services. Log management supports ingesting, searching and correlating logs with traces and metrics through a visual query builder. Dashboards can be built with a query builder, PromQL or ClickHouse SQL, infrastructure monitoring covers Kubernetes clusters, pods, nodes and host resources, and LLM and AI observability traces prompts, tool calls, tokens, latency and cost.

You can choose how to run it. SigNoz Cloud is fully managed, with a 30-day free trial and usage-based pricing that starts at $49. Enterprise options cover cloud, bring-your-own-cloud and self-hosted deployments with extra support and controls. The free Community edition runs in your own infrastructure via Docker, Kubernetes or Linux. The repository license is listed as 'Other' on GitHub.

This entry covers Grafana Pyroscope, an open-source continuous profiling platform. It collects profiles from running applications to show where CPU, memory and I/O are being used, helping teams find performance bottlenecks and cut resource consumption, either proactively or while resolving an incident with line-level detail.

Pyroscope has three main parts: a server that stores profiling data and serves queries, clients and instrumentation that send data using the Pyroscope SDKs, Grafana Alloy, or OTLP data from OpenTelemetry sources like the eBPF profiler, and Grafana Profiles Drilldown, a queryless interface for visualizing and analyzing profiles. SDKs exist for several languages, including Go, Ruby and Python.

Pyroscope 2.0 makes a new architecture the default, in which profiles go directly to object storage, so in-memory ingesters and local disks are no longer required, which simplifies operations. Existing v1 deployments can opt in and migrate without data loss. Pyroscope is licensed under AGPL-3.0 and written in Go.