# exceptionless/Exceptionless

Exceptionless application

Repository: https://github.com/exceptionless/Exceptionless
Canonical: https://ross.abutalabs.com/products/exceptionless
Homepage: https://exceptionless.com
Language: C#
License: Apache-2.0
License Family: permissive
Topics: error-handling, error-monitoring, exception, log, logging, asp-net, crash-reporting, crash-reports, monitoring, javascript, c-sharp, elasticsearch, redis, foundatio, exceptionless, unhandled-exceptions, crash-reporting-tool, error-reporting, error-stack-trace, bug-tracking-tool
Last push: 2026-08-26T21:14:34+00:00

## Health v2 (maintenance only)
Score: 99/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 99, release rhythm 99, longevity 100
- inputs: {"age_days": 4591, "days_push": 7, "days_rel": 7, "gap_med": 4.0, "n_releases_24m": 43}
- flags: none
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 2455, forks 507 (observed 2026-08-28T04:06:53.148213+00:00)

## What it is
Exceptionless is an open-source real-time error monitoring and reporting service for .NET, JavaScript, and Node applications, with clients for ASP.NET, Web API, WPF, React, Vue, Angular, and more. It collects unhandled exceptions, logs, and feature usage events, groups them intelligently, and offers dashboards, notifications, and self-hosting via Docker.

## Use cases
- track unhandled exceptions in asp.net apps
- real-time error reporting for javascript and node
- self-host an error monitoring service like sentry
- collect crash reports with stack traces
- monitor error regressions and get notifications
- log feature usage events with a dashboard
- group and deduplicate exceptions automatically

## When to choose
- you need real-time error tracking for .NET or JavaScript stacks
- you want an open-source, self-hostable alternative to Sentry
- you need intelligent exception grouping, stacking, and regression monitoring
- you want configurable error monitoring without redeploying code

## When to avoid
- you only need simple file-based logging without aggregation
- you require APM metrics like traces and performance profiling
- you cannot run Elasticsearch/Redis infrastructure and don't want the hosted plan
- your event volume exceeds your plan's monthly limits

## Facets
- artifact type: service
- maturity: active
- function: logging, monitoring, error-handling, alerting, search-engine
- domain: monitoring, developer-tools, web-development, apis
- platform: dotnet, self-hosted, cross-platform
- tags: error-monitoring, crash-reporting, exception-tracking, bug-tracking, elasticsearch, asp-net, javascript, real-time, event-logging, nodejs, docker, web-server

## Member repositories
- exceptionless/Exceptionless (main) score 99

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:06:53.148213+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-30T02:30:05.417230+00:00, confidence not recorded.
  - readme: https://github.com/exceptionless/Exceptionless (fetched 2026-08-28T04:06:53.148213+00:00, sha 6c37b3b9479b)
  - homepage: https://exceptionless.com (fetched 2026-08-29T10:11:21.221908+00:00, sha bb15cb05e2d5)
  - site_page: https://exceptionless.com/docs (fetched 2026-08-29T10:11:21.241971+00:00, sha 721b8992d154)
  - site_page: https://exceptionless.com/about (fetched 2026-08-29T10:11:21.244228+00:00, sha 89a505a21a4f)
  - site_page: https://exceptionless.com/pricing (fetched 2026-08-29T10:11:21.231906+00:00, sha 2c6b174bcb16)
- Data as of 2026-08-30T08:39:29.467469+00:00.