Best open-source alternatives to Sentry

SigNoz is a self-hostable observability platform aimed at teams that need a single place to inspect application logs, metrics, and traces. It positions itself as an open-source alternative to commercial monitoring products such as Datadog and New Relic, and it emphasizes OpenTelemetry-based instrumentation so users can collect telemetry with a vendor-neutral standard. The project provides several production-focused capabilities, including APM charts, centralized log search, distributed tracing, dashboards, alerting, exception monitoring, and LLM observability. The README indicates that users can deploy it with Docker or on Kubernetes via Helm, and that they can choose between self-hosted usage and SigNoz Cloud, depending on how much maintenance they want to manage.

highlight.io is an open-source observability and monitoring platform aimed at developers who need to understand frontend and backend behavior in one place. It combines session replay, error monitoring, logging, and traces into a cohesive product, and it supports integrations and SDKs for collecting data from applications. The project is available as a hosted service and can also be self-hosted for hobby or enterprise use. The README describes a quick Docker-based deployment for a hobby instance, along with a more scalable enterprise self-hosted option, making it relevant both to teams evaluating the product and to organizations that want to run their own monitoring stack.

Uptrace is an open source APM platform for teams that need to observe applications through traces, metrics, and logs in one place. It is designed for monitoring production systems, investigating incidents, and building a shared view of service health with dashboards, filters, alerting, and notifications. The project works by ingesting telemetry through OpenTelemetry and related integrations such as Prometheus, Vector, Fluent Bit, and CloudWatch. It stores data in ClickHouse and uses PostgreSQL for metadata such as metric names and alerts. The README also indicates support for managing users and projects through YAML configuration, and SSO via OpenID Connect providers like Keycloak, Google Cloud, and Cloudflare.