Exceptionless vs Sentry
Exceptionless and Sentry are both error tracking software. Exceptionless is open source under Apache-2.0, with 2.5k GitHub stars. Sentry is a commercial product from Functional Software, Inc.
Which to pick
- Pick Exceptionless when
- Your apps are mainly .NET and you want error tracking with first-class .NET integration.
- Pick Sentry when
- Almost any software team that ships code to users and wants to see errors as they happen, with SDKs for most languages.
Side by side
An error, log and feature-usage reporting service with strong .NET client support, self-hostable or hosted.
Captures exceptions and crashes from web, mobile and backend apps with stack traces and context, and adds performance tracing and session replay.
Self-hosting needs Elasticsearch, and the community is smaller than Sentry's.
Event-based pricing can climb on busy apps, and self-hosting the open version is a heavy stack of services.
Production-ready (both)
Self-hosted server and cloud service
Cloud service and self-hosted server
C#, .NET, Svelte and Elasticsearch
Python, Django, PostgreSQL, ClickHouse and Kafka
Open source, Apache-2.0 (permissive)
Closed source, sold by Functional Software, Inc.
You can build it into a product you sell, as long as you keep its copyright notice.
Closed source: you use it under the maker's terms and cannot change or resell the code.
2.5k GitHub stars
No Wikipedia article of its own
Established: started 12 years ago, latest release v8.10.0.
Not known
Other comparisons
More error tracking tools
Both sides were judged on 2026-11-03 from makers' descriptions, Wikipedia, READMEs and GitHub data. License, age and popularity lines are worked out directly.