Search once across OSI-approved open source, source-available projects, and proprietary products.
Text-defined diagrams: flowcharts, sequences, and Gantt in Markdown
Mermaid is a JavaScript tool that renders Markdown-inspired text into flowcharts, sequence diagrams, and Gantt charts, rendered natively in Markdown hosts such as GitHub.
Agent development environment running coding agents in parallel
Orca is a free, open-source agent development environment that runs Claude Code, Codex, and other coding agents in parallel, each in its own git worktree.
Polished chat interface for many model providers
LobeChat is the most designed of the open chat front ends. Plugins, an assistant marketplace, voice input and output, and vision support are all present, and the interface holds up next to commercial products.
Open-source web crawler that turns pages into LLM-ready markdown
Crawl4AI is a Python crawler that turns websites into clean markdown and typed JSON for RAG pipelines, AI agents, and data pipelines.
Real-time infrastructure monitoring with per-second metrics and alerts
Netdata is a self-hosted monitoring agent that collects per-second metrics from systems, containers, and applications, with built-in dashboards, alerts, and anomaly detection.
Self-hosted uptime monitoring with a clean status page
Uptime Kuma monitors HTTP endpoints, TCP ports, containers, and certificates, and notifies through almost a hundred channels. Setup is a container and a few minutes.
Distributed search and analytics engine with vector search
Elasticsearch is a distributed search and analytics engine for near-real-time full-text, vector, hybrid, and geospatial search.
API client that runs in the browser and stays fast
Hoppscotch is an API client that opens in a tab. Requests, collections, environments, and history are all there, and it starts in the time a desktop client takes to check for updates.
Private desktop chatbot that runs open LLMs fully on-device
GPT4All is a free desktop app from Nomic that runs open language models entirely on your own computer, with no cloud calls.
Free open-source software for live streaming and screen recording
OBS Studio is free and open-source software for live streaming and video recording, mixing scenes and sources on Windows, Mac, and Linux.
Open-source AI workspace for wikis, docs, and kanban projects
AppFlowy is an open-source workspace for wikis, docs, and kanban project boards. It presents itself as a self-hostable alternative to Notion and imports Notion workspaces from CSV files.
Self-hosted BI platform for exploring data and building dashboards
Apache Superset is a self-hosted business intelligence platform for exploring databases and building interactive dashboards with a visual query builder and SQL Lab.
Continuous file sync between your own devices only
Syncthing synchronises folders directly between devices with no server in the middle. There is no account, no storage quota, and no third party holding the data, because the data never leaves the set of machines you nominate.
Open-source investment research terminal with Python-first market data
OpenBB Terminal is an open-source financial terminal for market data, investment research, and analytics, now developed as the Open Data Platform.
Dashboards over whatever data you already store
Grafana is the visualisation layer that sits above other systems rather than a monitoring stack of its own. It queries Prometheus, Loki, PostgreSQL, ClickHouse, and dozens of other sources, and puts them on the same dashboard.
Open-source headless CMS turning content models into REST and GraphQL APIs.
Strapi is a self-hosted, open-source headless CMS built with JavaScript and TypeScript that turns content models designed in a no-code builder into REST and GraphQL APIs behind a customizable admin panel.
Free open-source Mac cleaner with app manager and monitor
Mole is a free, open-source cleaner for the Mac that pairs a 162-command terminal toolkit with a native app for junk cleanup, complete uninstallation, and system monitoring. It runs locally on macOS 13 and later, collects no tracking data, and has no account or paid tier.
Open-source AI coding agent for VS Code, JetBrains, and the terminal
Cline is an open-source AI coding agent that reads, edits, and runs code inside VS Code, JetBrains IDEs, and the terminal.
Open-source memory layer for AI agents and apps
Mem0 is an open-source memory layer that gives AI agents and apps persistent memory across sessions, with self-hosted and managed platform options.
Self-hosted AI workspace for chatting with documents and running agents
AnythingLLM is a self-hostable AI workspace for chatting with documents, running AI agents, and switching between local and hosted language models.
Open-source metrics monitoring with PromQL queries and alerting
Prometheus is an open-source monitoring system that scrapes metrics into a dimensional time-series database and evaluates PromQL rules for alerting.
Truly independent web browser with an engine built from scratch
Ladybird is building a new web browser engine from scratch, backed by a nonprofit and free of user monetization such as default search deals.
React MDX docs sites with versioning, search, and static output
Docusaurus is a React-based static site generator that turns MDX documents into documentation sites with versioning, translations, and search.
GPU-accelerated terminal emulator configured in plain-text TOML
Alacritty is a GPU-accelerated terminal emulator for BSD, Linux, macOS, and Windows that keeps its settings in a plain-text TOML file.
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