Exceptionless

Exceptionless provides real-time error, feature and log reporting for applications such as ASP.NET, Web API, WebForms, WPF, console and MVC applications, as well as JavaScript clients. It organises the collected information into actionable data.

Error notifications cover critical errors and regressions, and the top errors can be seen and prioritised. Events are grouped into stacks with their context, such as request details, environment and user information, so that bugs can be reproduced and fixed. It can be used as a hosted service or self-hosted.

Exceptionless is open source under the Apache 2.0 licence. The hosted service can be used for free, with paid plans.