Open-source alternatives to ElmahCore

LibLog is a single file for you to either copy/paste or install via nuget, into your library/framework/application to provide a logging abstraction.

Simple and modular logging library

Exceptionless clients for the .NET platform

Pluggable foundation blocks for building distributed apps.

Fluentd is a unified logging layer and distributed event router that collects, parses, and routes log data from diverse sources to various storage backends. It functions as a log forwarding agent and pipeline orchestrator, transforming raw unstructured log strings into formatted objects using structured log parsing. The project utilizes a plugin-based pipeline architecture to route data through independent input, filter, and output stages. It differentiates itself through tag-based event routing, which uses regular expression patterns to direct specific data streams to their intended destinat

A simple logging interface for Go

Leveled execution logs for Go

Structured Logging for Django

A Logstash logging extension for .NET Core applications with UDP and Redis transports

Lumberjack is a log rolling library for Go that manages the lifecycle of log files through size-based rotation and backup cleanup. It functions as a log retention manager to prevent disk exhaustion in Go services. The project optimizes log storage by compressing rotated files using the gzip algorithm and generating unique filenames via timestamped backups. It implements a retention policy that prunes historical records based on a maximum number of backups or a specified file age. The library implements the standard Go writer interface to integrate with logging libraries, providing a mechanis

dlogg

A portable logging abstraction for .NET

NLog is an open-source logging framework for .NET that functions as a structured logging library and log routing engine. It captures log events with named parameters as searchable data rather than plain text and directs these messages to various output destinations based on severity and source. The framework is designed as an extensible platform, supporting custom targets, layout renderers, and filters that can be loaded from external assemblies or defined in code. It features a dynamic configuration system that allows logging targets, rules, and layouts to be updated via XML or programmatic

NLog as Logging Provider for Microsoft Extension Logging

:mailboxwithmail: Alternative Mail target for NLog using MailKit

NLog integration for ASP.NET & ASP.NET Core

NLog targets specific for Windows.Forms / WinForms

Pino is a high-performance logging library for Node.js applications designed to minimize overhead and prevent blocking the main event loop. It generates machine-readable logs using newline-delimited JSON, facilitating efficient ingestion and analysis by external monitoring and log aggregation platforms. The library distinguishes itself by offloading log processing and formatting to worker threads, ensuring that heavy logging tasks do not impact application responsiveness. It also provides a decoupled command-line utility that transforms structured production logs into human-readable text, sim

:nutandbolt: PoShLog is PowerShell cross-platform logging module. It allows you to log structured event data into console, file and much more places easily. It's built upon great C# logging library Serilog - https://serilog.net/

Log to ApplicationInsights using the default ILogger

Very powerful server agent for collecting & sending logs & metrics with an easy-to-use web console.

Log exception details and custom properties that are not output in Exception.ToString().