The Commercial Open Source Software (COSS) Directory

Sync-in is an open-source collaborative platform for file storage, sharing, synchronization, and real-time document editing. It is designed for organizations seeking digital sovereignty and data governance, offering granular access controls, self-hosting capabilities, and integrations with WebDAV and office editors such as OnlyOffice and Collabora Online. The platform supports Windows, macOS, and Linux desktop synchronization clients alongside a web interface, and is released under the AGPLv3 license.

FlexPrice provides a dynamic pricing platform that helps businesses optimize their pricing strategies through AI-powered analytics and real-time market data. The platform enables companies to implement flexible pricing models that respond to market conditions and customer behavior.

OpenRouter provides a platform for accessing and using large language models (LLMs) through a unified API. It focuses on simplifying the integration of various LLMs for enterprises, enabling them to leverage AI technologies effectively.

ClickHouse is an open-source, column-oriented database management system (DBMS) designed for online analytical processing (OLAP). It excels at handling massive datasets efficiently, making it a popular choice for real-time analytics, observability, business intelligence, and financial services.

VectorChord is a PostgreSQL extension developed by TensorChord that provides scalable, high-performance, and disk-efficient vector similarity search. It succeeds pgvecto.rs and uses RaBitQ compression to store vectors at significantly lower cost, enabling billions of vectors to be hosted on a single machine. VectorChord is fully compatible with pgvector data types and syntax, and supports external index builds to offload resource-intensive indexing to separate machines.

Tuta (formerly Tutanota) is a secure email, calendar, and cloud storage service built and operated by Tutao GmbH, founded in 2011 in Hanover, Germany. All client applications are published as open source under the GPL-3.0 license, and the service uses end-to-end encryption with post-quantum cryptography to protect emails, calendar entries, and contacts. Tuta is bootstrapped and wholly owned by its two co-founders, with over 10 million users worldwide.

Fincept Corporation develops FinceptTerminal, an open-source, AI-powered financial intelligence platform for portfolio managers, analysts, and traders. The platform provides institutional-grade market analytics, real-time data across 19,000+ instruments, AI-driven investment research, and quantitative analysis tools. Fincept also offers a REST API with 500+ endpoints covering market data, fundamentals, economics, and QuantLib calculations, and a native cross-platform desktop application.

Quant-UX is an open-source research, usability, and prototyping tool that enables designers and researchers to quickly build interactive prototypes, conduct user testing, and gain data-driven insights. It offers features including a visual designer, design systems, A/B testing, screen recordings, heatmaps, and automated analytics to help teams validate product ideas and improve user experiences. Quant-UX is self-hostable and available as a cloud-hosted service, making it accessible to individuals, teams, and organizations of all sizes.

NanoCo is the company behind NanoClaw, a secure, lightweight, open-source AI agent framework that runs in containers. NanoClaw was built as a privacy-focused alternative to OpenClaw, isolating each AI agent in its own Docker container to prevent unauthorized data access. The framework supports integrations with WhatsApp, Telegram, and other communication tools, and is designed to be understood and customized by developers. NanoCo is building a commercial offering on top of the open-source project, targeting enterprise customers who need secure, auditable AI agents.

OpenWhispr is an open-source desktop dictation and transcription application. It enables privacy-first voice-to-text conversion using local AI models such as OpenAI Whisper and NVIDIA Parakeet, or cloud-based processing via user-supplied API keys. The application runs cross-platform on macOS, Windows, and Linux, and includes features such as AI-powered note cleanup, meeting transcription, a custom word dictionary, and an AI agent mode. The core desktop application is released under the MIT License, while the OpenWhispr Cloud API and website are proprietary.

Born in the cloud and tailored for modern teams, Devtron unifies CI/CD, GitOps, observability, and security into one seamless Kubernetes-native platform. We simplify software delivery, helping teams embrace cloud-native practices with confidence and efficiency. From startups innovating quickly to enterprises managing complex systems, Devtron empowers teams worldwide to build, deploy, and run applications reliably. By integrating powerful tools and insights, we enable developers to focus on crafting exceptional software while we handle the intricacies of Kubernetes.

Mike OSS is an open-source legal AI platform built as a self-hostable alternative to commercial legal AI tools such as Harvey and Legora. It provides an AI assistant for drafting, reviewing, and editing legal documents, along with features for project-based file management, tabular document review, and pre-built legal workflows. Law firms can deploy Mike on their own infrastructure, keeping documents and data within their own systems. The project is licensed under AGPL-3.0 and was built by former Latham & Watkins associate Will Chen.

Workbrew is a secure software delivery platform that enables organizations to deploy, manage, and secure Homebrew — the open-source package manager for macOS and Linux — at enterprise scale. It provides IT and security teams with centralized fleet management, policy enforcement, vulnerability detection, and real-time analytics across all devices running Homebrew. Built by former GitHub engineers who are core Homebrew contributors, Workbrew bridges the gap between developer productivity and organizational security requirements.

OpenSRE is an open-source framework for building AI-powered SRE agents that autonomously investigate and resolve production incidents. Built on LangGraph, it connects to 60+ tools across observability, cloud infrastructure, data platforms, and incident management to correlate signals, test root-cause hypotheses in parallel, and deliver evidence-based analysis before engineers are paged. The company, operating under the legal name The Forge Software, Inc., was founded in 2023 and is headquartered in London.

Omi is an open-source AI wearable device developed by Based Hardware Inc. that captures and transcribes conversations in real time, generates summaries and action items, and builds a persistent memory of the user's daily interactions. The platform is fully open source including hardware designs, firmware, mobile app, and backend and supports a developer ecosystem for building third-party integrations and applications. Omi is available as a consumer device and as a developer kit, and the software runs on iOS, Android, and desktop.

UploadThing is a file upload service for full-stack TypeScript developers that provides a simpler and more secure alternative to managing file uploads directly with S3. It handles authentication on the developer server while routing uploads through its own infrastructure, and includes a dashboard for managing uploaded files.

Dust is a platform that allows organizations to build custom AI agents connected to their company knowledge and tools, powered by various AI models.

Dria is a decentralized AI inference network and inference lab that provides access to open-source LLMs through a CLI and an OpenAI-compatible API, powered by a distributed peer-to-peer network of compute nodes. The company also develops Kai, an autonomous AI coding agent that continuously maintains codebases by running security audits, performance optimizations, and code hygiene tasks as a fleet of specialized sub-agents. Dria's open-source compute node software enables anyone to contribute hardware to the network and earn rewards by serving AI model inference.

EvoMap is an AI agent self-evolution infrastructure built around the Genome Evolution Protocol (GEP), which enables agents to encode learned experiences as reusable Genes and Capsules that can be shared, validated, and inherited across the network. The companys open-source Evolver engine implements the GEP loop, allowing agents to analyze runtime history, select matching genes, and emit protocol-bound evolution prompts with full audit trails. EvoMap operates as a decentralized network where AI agent capabilities flow and evolve like biological genes, independent of any single platform.

SonarSource provides world-class solutions for continuous code quality management, helping developers deliver high-quality and secure software by analyzing code they write, AI-generated code, and code leveraged from third parties. Their integrated approach catches issues before production, reducing technical debt and code complexity.

Confluent provides a cloud-native data streaming platform built on Apache Kafka and Apache Flink, enabling organizations to process, connect, and govern real-time data streams across cloud and on-premises environments. The platform is used to build event-driven applications, power AI and machine learning workloads with live data, and replace fragmented point-to-point data pipelines with a unified streaming infrastructure.

Vates is a French open source software company founded in 2012 and specializing in enterprise virtualization. It develops and maintains XCP-ng, an open source hypervisor based on the Xen Project, and Xen Orchestra, a web-based management and backup platform for XCP-ng and XenServer environments. Together these products form the Vates Virtualization Management Stack (Vates VMS), a fully open source alternative to VMware. Vates offers commercial support subscriptions with enterprise-grade SLAs and a partner network for deployment and services.

VoidZero is a company building next-generation tooling for JavaScript and TypeScript development. Founded by Evan You, creator of Vue.js and Vite, the company develops a unified high-performance toolchain including parser, transformer, resolver, linter, formatter, minifier, bundler, test runner, and meta framework support to make web developers more productive than ever before.

Blindside Networks is the creator and primary commercial backer of BigBlueButton, an open-source virtual classroom platform purpose-built for online education. The company provides hosted, enterprise-grade BigBlueButton deployments integrated with leading learning management systems including Canvas and Moodle, and offers analytics tools to help educational organizations improve student engagement and learning outcomes. Founded in Ottawa, Canada, Blindside Networks serves K-12 schools, higher education institutions, corporate training programs, and government agencies worldwide.

Chat2DB is an AI-powered database management and SQL client tool built on an open-source core. It enables users to connect to more than 30 database types—including MySQL, PostgreSQL, Oracle, ClickHouse, and MongoDB—and generate optimized SQL queries from natural language using large language models. The platform offers features such as a Text-to-SQL copilot, AI-generated BI dashboards, schema-aware query generation, and data migration utilities, available as both a desktop client and a SaaS product.

Railway is a platform that allows developers to deploy applications without managing infrastructure. It provides a seamless experience for building, deploying, and scaling applications using modern technologies. The platform primarily serves enterprises and developers.

Mistral AI is focused on developing advanced AI models and technologies. The company specializes in creating large language models (LLMs) to serve enterprise needs. Mistral AI's core products are built on cutting-edge AI/ML technologies.

Chainguard provides security solutions for software supply chains, focusing on securing open-source projects and ensuring the integrity of software components.

Parrot Security develops Parrot OS, a Debian-based GNU/Linux distribution focused on cybersecurity, privacy, and software development. The distribution ships with a comprehensive suite of tools for penetration testing, digital forensics, and anonymous browsing, and is available in multiple editions including a Home edition for daily use and a Security edition for professional red team operations. Parrot Security is incorporated in the United Kingdom as a Community Interest Company and operates in partnership with Hack The Box.

Vitality is an AI-powered health and fitness companion app available on iOS, Android, and the web. It enables users to log meals via photo recognition, track workouts and body metrics, monitor hydration and sleep, and receive personalised guidance from an AI coach. The app is built on React, TypeScript, and Capacitor with a Supabase backend, and its source code is publicly available under the AGPL-3.0 license.