Open-source alternatives to Errbit

Exception tracking and logging from Ruby to Rollbar

The official Airbrake library for Ruby applications

Reaction is an event-driven, headless commerce platform designed to decouple backend business logic from the frontend presentation layer. It utilizes an API-first architecture with a GraphQL data layer to manage online sales and retail operations. The platform supports multi-tenant resource sharing, allowing multiple independent storefronts to be hosted and managed within a single installation. It features a plugin-based extension system that enables the integration of third-party services and custom business logic through composable workflows. The system covers core retail capabilities incl

PlotJuggler is an interactive time series visualization tool that loads, streams, and renders large datasets using hardware-accelerated OpenGL graphics. It functions as a multi-format data loader, supporting file formats such as CSV, ULog, and ROS bags, and also serves as a live data stream viewer that subscribes to real-time sources via MQTT, WebSockets, ZeroMQ, and UDP. The tool distinguishes itself through a plugin-based extensibility platform that allows users to add custom data sources, file formats, and processing capabilities. It includes a Lua scripting engine for creating custom data

Hanko is an open-source identity provider and customer identity and access management system. It serves as a passkey authentication service and an OAuth and SAML SSO gateway, allowing applications to authenticate users and issue tokens via standard identity protocols. The project distinguishes itself through a strong focus on passwordless access using WebAuthn-based passkeys and email-based passcodes. It provides framework-agnostic authentication interfaces as customizable web components that can be embedded directly into web applications to handle login, registration, and profile management.

This project is a Django library that enables web applications to authenticate users through third-party identity providers using standard protocols like OAuth and OpenID Connect. It functions as an integration layer that delegates authentication to external services, allowing users to sign in with existing accounts while maintaining a persistent link to their local application profile. The library distinguishes itself through a modular pipeline that executes a sequence of functions to validate and manage user records during the login process. It employs a strategy-based approach to encapsula

Ombi is a media request management system that coordinates content discovery between users, media servers, and download managers. It acts as a middleware layer to automate the process of requesting, approving, and acquiring movies, music, and TV shows. The project differentiates itself by acting as an integration layer that synchronizes libraries and user accounts across multiple media server instances. It features a content request orchestrator that supports voting-based automatic approval and the ability to import active requests directly from external watchlists. The platform covers a bro

Tinyauth is an authentication middleware service and identity provider that verifies user identities to grant system access. It operates as a standalone server or as an authentication gateway, utilizing a reverse proxy model to intercept requests and validate credentials before traffic reaches protected backend services. The project functions as an OpenID Connect provider for single sign-on experiences and an OAuth 2.0 gateway that delegates verification to external providers such as Google and GitHub. It also acts as an LDAP authentication server, allowing for centralized user management and

Utterances is an embedded commenting system that uses GitHub Issues as a backend to store and manage discussions for websites. It provides a web widget that integrates conversation threads directly into web pages, mapping individual URLs to specific GitHub issues to organize discussions by page. The system integrates third-party identity verification via OAuth to ensure that comments are linked to verified accounts. It automatically handles the creation of tracking tickets when a conversation starts on a page without an existing record, converting website feedback into structured issues. The

Gitalk is a comment system that uses GitHub Issues as a backend to store and manage discussions for websites. It provides a comment component built with Preact for embedding interactive discussion areas into web pages. The system utilizes GitHub OAuth for identity verification, allowing users to authenticate through their GitHub accounts to manage comment permissions. It also includes a multi-language widget that supports interface translation based on browser settings or manual configuration. The project covers broader capabilities for comment section management, including the ability to re

JustAuth is an OAuth 2.0 authentication library designed to integrate multiple third-party login providers into a single interface. It abstracts various social login APIs and identity services, allowing applications to manage authentication using the OAuth 2.0 and OIDC protocols. The project provides a multi-provider identity integrator that replaces the need for individual vendor software development kits. It includes a toolkit for defining custom authentication platforms and proprietary identity services by specifying custom OAuth protocols and endpoints. The library manages the full authe

This project is a modular, terminal-based dashboard framework designed to aggregate and display real-time information within a grid-aligned interface. It functions as a centralized monitoring tool that translates data from local system resources, infrastructure services, and external web APIs into a unified, text-based display. The dashboard is distinguished by its plugin-based architecture, which allows users to encapsulate distinct data sources and display logic into isolated, independently managed modules. Users define their workspace through declarative configuration files or an interacti

Devise is a comprehensive identity management system and authentication framework for Ruby on Rails applications. It provides a complete set of tools for managing user registration, secure sign-in, and session handling using a modular strategy pattern. The framework distinguishes itself by offering a suite of security hardening features, including brute force protection through account locking and secure password recovery workflows. It also functions as an integrator for external identity providers and third-party authentication via standardized protocols. Broad capabilities cover the full u

OpenAuth is a standards-based authentication server and identity provider that implements OAuth 2.0 and OpenID Connect protocols. It serves as a centralized system for managing user identities, issuing access tokens, and orchestrating authentication flows across various services. The project functions as a federated identity gateway, aggregating external providers such as Google, GitHub, Microsoft, Apple, and Discord into a unified login flow. It distinguishes itself with a multi-tenant architecture that supports pluggable identity providers and customizable user interface frameworks for bran

ServiceStack is a high-performance .NET web framework designed for building type-safe APIs using strongly-typed request and response objects. It functions as a message-based API engine that decouples business logic from the transport layer, allowing services to be exposed via multiple protocols including HTTP, gRPC, and various message queue providers. The framework is distinguished by its type-safe API generator, which produces native client SDKs and data transfer objects from service metadata across multiple languages. It also includes a distributed service gateway for microservices orchest

RabbitMQ is a multi-protocol messaging broker that functions as an AMQP message broker, a clustered message queue, and a distributed message stream. It provides a server for translating and bridging communication between diverse messaging standards to connect heterogeneous systems. The system distinguishes itself through distributed broker clustering and federation, using shoveling mechanisms to synchronize data across geographically separate sites. It supports high-throughput, append-only logs for persisting and reading large sequences of messages for real-time processing. The broker covers

Capacitor is a cross-platform mobile framework that enables developers to build native applications using web technologies. It functions as a hybrid app container, wrapping web assets within a native runtime that provides a standardized bridge to device hardware and system-level services. By exposing native functionality through a plugin-based architecture, it allows web applications to access platform-specific features while maintaining a consistent interface across mobile and desktop environments. The project distinguishes itself by maintaining native project files as source assets, allowin

This project is a containerized error tracking platform and monitoring suite designed for self-hosted deployment on private infrastructure. It provides a collection of services for capturing and analyzing software crashes and exceptions, ensuring that sensitive application data remains within a controlled environment. The system includes specialized tooling for air-gapped deployment, allowing the software to be installed and operated on servers without internet access through the manual transfer of container images. It also supports corporate network integration via proxy configurations to ma

webfunny_monitor is an open-source frontend monitoring and analytics platform that tracks page load performance, JavaScript errors, and user behavior. It serves as a comprehensive tool for measuring page load speed, API response times, client-side errors, and custom user events, with real-time dashboards that stream aggregated metrics via WebSocket for sub-second updates. The project distinguishes itself through its architectural approach: events are collected asynchronously via lightweight HTTP beacons and batched before transmission, while a memory-bounded local storage buffer ensures relia

This project is a JavaScript error tracking SDK and application performance monitoring tool. It captures runtime exceptions and crashes across web browsers, server-side environments, and edge computing contexts. The SDK includes a session replay tool that records visual user interactions to reproduce bugs. To ensure telemetry delivery, it provides a tunneling proxy that routes monitoring data through custom endpoints to bypass browser-level ad blockers. The toolkit also features a source map processor that translates minified stack traces back into original source code. Additionally, it cove

Highlight is a full-stack observability platform and monitoring system that aggregates logs, errors, and distributed traces to provide a unified view of application health. It functions as a distributed tracing system, an error monitoring service, and a session replay tool. The platform is available as a dockerized monitoring stack for self-hosted deployments on Linux. It distinguishes itself by combining backend observability with a visual recording system that captures document object model changes and network requests to replay user interactions. The system covers several core capability

GmsCore is an Android app compatibility layer and system service mock designed to enable third-party applications to function on non-standard Android distributions. It serves as a background service that simulates proprietary Google APIs and emulates the necessary system environment for devices where official services are not installed. The project provides a MicroG compatible implementation, offering an open source replacement for system services. It focuses on maintaining application stability on custom Android ROMs by preventing crashes associated with missing proprietary dependencies. Th

GitBucket is a self-hosted Git hosting platform and forge designed for managing private repositories. Built with the Scala language, it provides a web interface for version control and is implemented as a server compatible with the GitHub API to ensure integration with existing third-party tools. The platform allows for customization of the version control environment through a plugin-based extension model, enabling the installation of third-party plugins to add specialized features. Its capability surface covers software project management via integrated issue trackers, pull requests, and w

HyperDX is an OpenTelemetry observability platform that provides centralized log management, distributed tracing, and a self-hosted monitoring stack. It functions as a unified system for collecting, indexing, and visualizing logs, metrics, and traces from cloud and container environments. The platform distinguishes itself with specialized tooling for large language model monitoring and session replay, allowing user interactions in the browser to be linked to backend telemetry. It employs schema-less JSON parsing to index structured logs dynamically and uses source maps to resolve minified sta

Elsa Core is a workflow engine framework designed for defining, executing, and managing long-running business processes. It functions as a distributed workflow orchestrator and event-driven trigger system, capable of operating as a multi-tenant platform with secure data isolation. The project distinguishes itself through a flexible approach to workflow definitions, supporting a visual drag-and-drop designer, programmatic C# definitions, and portable JSON specifications. It provides a highly extensible architecture allowing for the development of custom activities and the use of a dynamic expr

The server acts as a centralized ingestion engine designed to collect, normalize, and index distributed telemetry data. It functions as a backend processor that receives performance metrics, traces, and error logs from application agents, transforming them into structured documents for storage and analysis within search and analytics platforms. The system distinguishes itself through a high-throughput ingestion pipeline that utilizes asynchronous event processing and backpressure-aware flow control to maintain stability during traffic spikes. It employs modular, plugin-based transformation st

Winston is a versatile logging library for Node.js designed to record system events and metadata. It functions as a multi-transport log manager that routes data to various destinations and a structured log formatter that transforms entries into JSON or plain text. The project is distinguished by its pluggable transport architecture, which decouples the logging interface from delivery mechanisms. This allows for the creation of custom transport extensions and the use of hierarchical logger instances to inherit configurations while attaching persistent metadata to downstream messages. The libr