Search once across OSI-approved open source, source-available projects, and proprietary products.
Modern game engine on Valve Source 2 with C# and live hotload
s&box is a modern game engine built on Valve's Source 2 and .NET that creates games in C# with millisecond hotload and a Unity-like scene system.
Self-hosted monitoring for networks, servers, and cloud
Zabbix is a self-hosted monitoring platform that tracks networks, servers, virtual machines, and cloud services from one distributed setup, with agents and agentless checks feeding dashboards, alerting, and escalation under a free AGPL license.
Industrial IoT time-series database for edge and cloud
Apache IoTDB is an open-source time-series database for industrial IoT that collects, stores, and analyzes sensor data across edge devices and the cloud.
The free and open-source browser that puts your privacy first
Waterfox is a free and open-source web browser built on the Gecko engine that ships privacy protections, including no telemetry, built-in ad and tracker blocking, and private DNS, out of the box.
Open-source orchestrator for agentic workloads and durable Actors
Rivet is a self-hostable orchestration platform that runs agentic workloads as durable Actors with state, realtime, and scheduling built in.
No-code database and application builder you can host
Baserow is a spreadsheet-shaped database with the API and permission model of a real backend underneath. Non-technical colleagues get grid, gallery, kanban, and calendar views; engineers get a REST API and webhooks over the same data.
Open-source LLM observability and AI gateway for monitoring and evaluation
Helicone is an open-source observability platform and AI gateway for LLM applications. Teams point their existing OpenAI-compatible client at the Helicone gateway and every request is logged with traces, sessions, users, cost, and latency.
AI-first, open-source BI with dbt-native metrics and no per-seat pricing
Lightdash is an AI-first, open-source BI platform for teams that model with dbt.
Open-source graph database with native vector and full-text search
HelixDB is an open-source graph database with native vector and BM25 full-text search, built in Rust on object storage for combined graph, semantic, and keyword queries.
A security-hardened self-hosted cloud for home and small business
Cosmos Server manages a personal cloud on hardware you own.
Open source team password manager you can self-host
Passbolt is an open source password manager for teams with end-to-end OpenPGP encryption, granular sharing, and a server you can self-host.
Real-time OLAP datastore for low-latency user-facing analytics
Apache Pinot is a real-time distributed OLAP datastore that answers SQL queries over streaming and batch data within milliseconds.
Self-hosted file sharing and collaboration on a Go microservice backend
OpenCloud is a self-hosted file-sharing and collaboration platform with a Go microservice backend, desktop and mobile apps, and EU-based hosting options.
Self-hosted continuous localization with tight Git integration
Weblate is a self-hosted localization platform that syncs translations with Git repositories, also available as a hosted service.
Offline maps and navigation with hiking, cycling, and driving guidance.
OsmAnd is an offline maps and navigation app built on OpenStreetMap data, with turn-by-turn voice guidance for driving, cycling, and walking.
Self-hosted project management with issue tracking and Gantt charts
Redmine is a GPL-2.0 licensed, self-hosted project management web app built on Ruby on Rails, with issue tracking, Gantt charts, time logging, and multi-project support.
SQL data warehouse on Hadoop for large-scale batch analytics
Apache Hive is an open-source SQL data warehouse built on Hadoop that queries large distributed datasets through HiveQL and standard JDBC and ODBC clients.
Open-source helpdesk and customer support platform
Zammad is an open-source helpdesk and customer support platform that unifies email, chat, phone, and social channels, with self-hosted or managed cloud operation under an AGPL-3.0 license.
Open-source authorization service for fine-grained RBAC, ABAC, and ReBAC
Permify is an open-source authorization service for fine-grained access control. Teams model RBAC, ABAC, and ReBAC policies centrally and enforce them through a Zanzibar-inspired decision service.
Durable step functions for event-driven apps and AI agents
Inngest is a durable execution platform for event-driven apps: SDK step functions with checkpoints, retries, and waits run on serverless or your own servers.
Self-hosted product analytics with funnels, cohorts, and push.
Countly is a self-hosted product analytics platform that tracks events, user journeys, funnels, cohorts, and retention.
Open-source desktop app that runs coding agents in parallel
Emdash is an open-source desktop app that runs multiple coding agents in parallel, each isolated in its own Git worktree.
Self-hosted network documentation that updates itself
Scanopy is a self-hosted network discovery and documentation platform that maps devices, topologies, and racks into diagrams that stay current.
Open-source virtual office where avatars trigger proximity video chat
WorkAdventure is a customizable 2D virtual office where teams meet as avatars. A video chat starts automatically when avatars approach each other.
The proprietary products most often replaced by something in this directory.
Notion
Notion Labs
Documents, databases, and project tracking in one workspace
13 open source alternatives
Google Analytics
Web and product analytics tied to Google's ad stack
12 open source alternatives
Datadog
Datadog
Infrastructure monitoring, logs, and tracing in one platform
10 open source alternatives
Dropbox
Dropbox
File sync and sharing across devices and teams
10 open source alternatives
Slack
Salesforce
Channel based team messaging with a large integration ecosystem
10 open source alternatives
Auth0
Okta
Hosted identity covering login, SSO, and multi-factor
9 open source alternatives
Where the directory is growing fastest this month.
Running and talking to language models, on your own hardware or someone else's.
32 products+14.2%
Frameworks and runtimes for building, orchestrating, and supervising autonomous agents.
73 products+12.4%
Assistants that read a codebase and carry out engineering work from natural language instructions.
26 products+11%
Utilities that sit in the daily loop of writing, testing, and shipping software.
292 products+7.2%
Tools that connect applications and run multi step processes without manual work.
57 products+6.4%
Metrics, logs, traces, and error reporting for systems in production.
60 products+6.1%
774 results