Search Companies
Find startups and other companies in the COSS ecosystem
Versioned file workspace for AI agents
PuppyOne develops a local-first file workspace and an optional cloud-hosted context drive for AI agents. Its software combines file editing and SaaS data connectors with Git version history, per-agent access permissions, audit logs, and shared access through MCP, CLI, and REST APIs. The company offers open-source desktop and cloud software alongside paid developer, team, and enterprise plans, including self-hosted deployment options. It also maintains Open Deep Wide Research, an agentic research tool with configurable search sources, depth, and breadth.
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Project workspace for teams and AI agents
Tale, built by Ruler GmbH in Switzerland, provides an open-source project workspace where teams plan work, assign tasks to people or AI agents, and review delivered files and results. It combines project boards, shared knowledge, persistent agent sandboxes, configurable workflows, and access controls, with support for multiple agent runtimes and local or cloud AI models. The MIT-licensed Community edition includes all product features for self-hosting, while paid Enterprise services add managed operation, installation, maintenance, and support on customer infrastructure or in Swiss and EU data centers.
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Tabular AI and machine-learning tools
Probabl develops software and services for building predictive models from tabular data. Its Skore platform combines an open-source Python library for model evaluation and experiment tracking with agent-assisted workflows, methodological checks, and governance for enterprise data-science teams. The company supports scikit-learn and related open-source data-science tools, and offers training, certification, support, and professional services. Its tools are designed to work with existing machine-learning frameworks and computing environments.
Continuous agentic pentesting platform
Keygraph provides a continuous application-security platform for automated penetration testing of source code and running web applications. The platform combines whitebox and blackbox testing with static analysis, software composition analysis, secrets scanning, and remediation workflows. Its open-source Shannon engine uses AI agents to identify attack vectors and validate vulnerabilities with working exploits.
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Check out COSS Weekly on the webOpen-source GPU tools and benchmarks
Traverse Research is a Breda-based rendering research and game-engineering company. It develops Evolve, a GPU and AI benchmark, and provides rendering, GPU architecture, and performance engineering for hardware vendors and game studios. Its open-source work includes gpu-allocator, a Rust library for GPU memory allocation across Vulkan, DirectX 12, and Metal, along with graphics, shader, asset, and platform tools.
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Cloud data-streaming platform
StreamNative provides a data platform that keeps streaming data available to applications, analytics, and AI agents. Its platform supports native Apache Pulsar and Kafka workloads, with deployment options including managed cloud and private cloud. The platform combines streams and lakehouse tables on shared open infrastructure for messaging, streaming data pipelines, and AI and agent use cases.
Local AI agents for Mac
Osaurus develops an MIT-licensed macOS application for running task-oriented AI agents with local or cloud models. The app can access user-approved Mac apps, files, and web resources, retain local agent memory, and run multi-step workflows. Built in Swift for Apple Silicon, it provides MCP and model-provider integrations.
Self-hosted voice-agent platform
Dograh provides a self-hosted platform for building and deploying voice agents. Its visual workflow builder connects telephony, speech-to-text, language-model, and text-to-speech components, with deployment options on customer infrastructure or a managed cloud. The open-source project is designed for teams that need control over their voice-agent stack and data boundaries.
Geospatial data management platform
DroneDB, operated by Digipa s.r.l., provides a cloud and self-hosted platform for managing and sharing geospatial data. It supports storage, browser-based visualization, analysis, and automated workflows for orthophotos, point clouds, 3D models, panoramas, and vector data.
On-premise AI for code intelligence.
Asterisk provides on-premise AI agents that analyze and understand codebases, offering secure and fast development without data exposure.
Bitemporal SQL database
JUXT develops and supports XTDB, an open-source immutable SQL database for application development, time-travel reporting, and data-compliance use cases. XTDB uses bitemporal records, SQL:2011 capabilities, and flexible handling of semi-structured data. Its cloud-native ACID engine is built on Apache Arrow and designed for object storage. JUXT provides production support, consulting, and training around XTDB.
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WireGuard security consulting and integration
Edge Security is an information security research and consulting firm that performs security assessments across applications, networks, infrastructure, and cryptography. It also provides reverse engineering, hardened development, and physical-security services. The firm created WireGuard and provides solutions for using and integrating the secure tunnel.
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Valkey and Redis monitoring platform
BetterDB develops BetterDB Monitor, a self-hosted or cloud observability platform for Valkey and Redis. It retains slowlog, command history, and client analytics, and provides real-time dashboards, anomaly detection, and Prometheus and OpenTelemetry integrations.
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Data anonymization for test environments
Greenmask develops an open-source tool for data anonymization and test data management. It transforms database data for testing and staging while preserving data relationships and formats. The project provides configuration-driven transformations, subsetting, validation, and synthetic-data capabilities for production-like development workflows.
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Advanced open-weight AI language models
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.

