Open-source AI tools668 of 27,175 tools

Offered under an open-source licence, per the pricing page; any paid tier is hosting or support.

Describe what you need

beta

A sentence or two about the job. We read it into the catalogue's own words, then ask about every tool that fits them.

Ranked by use

Price

What it doesAgents100 Workflow automation46 Monitoring33 Code generation31 Security27 Analytics24

Figure and bar: visits/mo, estimate · year: online since

#1
WordPress Marketing
Open source content management system and website builder with block-based editing and plugin extensibility.
1.1M
Active
Open source
2003
#2
Baserow Data MCP · sign-in
Builds spreadsheet-style databases into no-code applications, with automations and dashboards, and can be self-hosted.
266k
Active
From $10/user/mo
2020
#3
Bruin Analytics
Queries live data sources and generates answers, dashboards, and automated fixes across your data stack.
198k
Active
Open source
#4
Ollama LLM operations
Runs open-source language models locally or in cloud, with API access for coding agents.
193k
Active
From $20/mo
2023
#5
OpenClaw Agents MCP · sign-in
Open source AI assistant that manages email, calendar, and tasks from chat apps without subscriptions.
182k
Active
Open source
#6
Keploy Developer tools MCP · open
Captures production traffic to generate tests and mocks, replaying them to detect regressions.
153k
Active
From $19/user/mo
2021
#7
Roboflow Sales MCP · sign-in
Hosts a pipeline for building, labeling, training and deploying computer vision models on images, video and camera streams.
139k
Active
From $39/mo
2019
#8
OpenCode Developer tools
Open source coding agent that generates code in terminal, IDE, or desktop app with support for multiple LLM providers.
108k
Active
Open source
2025
#9
Continue (Mission Control)Coding
Open-source coding agent that assists developers with code generation and refactoring tasks.
91.9k
Active
Open source
#10
Dbt labs Analytics
Transforms raw data into tested, version-controlled SQL models for analytics and AI pipelines.
74.7k
Active
From $100/user/mo
#11
Cypress Developer tools MCP · sign-in
Runs browser and component tests for web apps inside a real browser, with time-travel debugging and a hosted Cloud dashboard for CI results.
61.2k
Active
From $67/mo
2014
#12
Thinking Machines Lab LLM operations
Provides Tinker, an API for fine-tuning open-weight language models with LoRA while the lab runs the distributed training infrastructure.
59.5k
Active
From $0.33 per use
2025
#13
LobeHub Productivity MCP · open
Organizes and operates multiple AI agents 24/7, handling task scheduling and reporting through your existing chat tools.
51.4k
Active
From $9.90/mo
#14
Nous Research Developer tools
Trains and releases open source language models with infrastructure for distributed training.
33.7k
Active
Open source
#15
Vellum Agents
Runs an autonomous AI assistant on your computer that manages tasks, remembers preferences, and takes actions across your tools and files.
30.8k
Active
Open source
2024
#16
MariaDB Data MCP · open
Relational SQL database server offered as open-source community edition, self-managed enterprise build, and managed cloud service.
28.7k
Active
From $0.16 per use
#17
Inbox Zero Productivity
Sorts Gmail and Outlook inboxes with an assistant that labels, archives and drafts replies by your rules, and bulk-unsubscribes from newsletters.
27.8k
Active
From $20/user/mo
#18
Onyx Knowledge
Open source AI chat platform that searches your docs, apps and knowledge base to answer questions with grounded responses.
27.3k
Active
From $20/user/mo
#19
Carbon Design System Developer tools MCP · sign-in
Provides IBM's open-source UI components, design tokens, icons and usage guidelines for building consistent product interfaces.
26.1k
Active
1911
#20
Svelte Developer tools MCP · open
Compiles HTML, CSS and JavaScript components into minimal browser code, a UI framework that does most of its work at build time.
25.6k
Active
2016
#21
Open WebUI Developer tools
Self-hosted web interface for running AI models locally with data residency and access control.
25.2k
Active
Free plan
#22
AI SDK Developer tools
Unified TypeScript SDK for building AI applications with streaming, multi-model support, and fallbacks.
22.6k
Active
Open source
#23
Airbyte Data MCP · sign-in
Replicates data from hundreds of SaaS apps, databases and files into warehouses, lakes and vector stores through prebuilt and custom connectors.
19.2k
Active
Open source
2020
#24
Kong Inc.Developer tools MCP · sign-in
Routes, secures and meters API and LLM traffic through a gateway that proxies requests and enforces plugins for auth, rate limits and token costs.
19.2k
Active
From $25/mo
#25
Meilisearch Retrieval (RAG)
Hosts searchable indexes with full-text, semantic, and hybrid search across text, images, and video.
17.3k
Active
Open source
#26
LiteLLM LLM operations
Routes requests across 140+ LLM providers and 1800+ models through a single API gateway with cost optimization and access controls.
15.2k
Active
Open source
2023
#27
Hindsight Developer tools
Persistent memory system for AI agents that learns from mistakes and improves decision-making over time.
13.2k
Active
Open source
2024
#28
Medusa Developer tools MCP · sign-in
Open-source commerce backend with modules for products, inventory, multi-warehouse stock, pricing rules and multi-region sales, customised by developers.
11.2k
Active
From $29/mo
2021
#29
Inngest Automation
Executes durable workflows and background jobs with built-in retries, flow control, and observability without separate infrastructure.
11.1k
Active
Open source
2022
#30
Sentient Developer tools
Develops open-source tools for AI agents to reason, learn, and improve through benchmarking and evaluation.
9.5k
Active
Open source
#31
Tiptap Developer tools
Headless editor framework with extensions for real-time collaboration, AI agents, and document conversion.
9.5k
Active
From $49/mo
2023
#32
Budibase Developer tools
Open-source low-code builder for internal tools, forms and admin apps on top of databases and APIs, with workflow automations and AI agent steps.
9k
Active
Open source
#33
Yugabyte Data
Distributed SQL database compatible with PostgreSQL that replicates data across nodes and regions for high availability and horizontal scaling.
8.4k
Active
Open source
2016
#34
Mastra Developer tools
TypeScript framework for building, deploying, and observing AI agents and workflows.
7.1k
Active
Open source
2024
#35
Deno Developer tools
Fast, open-source JavaScript and TypeScript runtime with built-in tooling, package manager, and Node.js compatibility.
6.9k
Active
From $20/mo
2018
#36
Sentient Foundation Agents
Builds open-source AI models and agent frameworks, including a recursive planner-executor for multi-step tasks and an open deep-search agent.
6.7k
#37
Llama Windows Agents
Runs open AI models locally on Mac and Windows, serving a chat window and an OpenAI-compatible local API.
5.7k
Active
#38
HopToDesk Sales MCP · sign-in
Free remote desktop client that lets users share screens and control other computers, with an optional paid dashboard for device monitoring and help desk tickets.
4.8k
Active
From $15/mo
2022
#39
OpenObserve Developer tools
Stores and queries logs, metrics and traces in an open-source observability backend on object storage, with dashboards and alerts.
4.6k
Active
Open source
2022
#40
Penpot Creative & media
Open-source design tool for building UI wireframes, prototypes and component libraries, with CSS grid and flex layout and code inspection.
4.2k
Active
2021
#41
Medplum Health MCP · sign-in
Hosts FHIR-native clinical data storage and workflow automation APIs for building custom healthcare applications.
3.9k
Active
Open source
#42
freehire Careers MCP · open
Gathers tech job listings straight from employers' own hiring pages, then exposes them through a CLI and MCP server.
3.8k
Active
From $5/mo
#43
The Best API Documentation Tool Developer tools MCP · open
Renders OpenAPI definitions into hosted API reference docs and runs a mock server for them.
3.6k
Active
From $10/user/mo
2018
#44
Uno Platform Developer tools MCP · open
Open-source .NET framework that builds one C# and XAML codebase into apps for Windows, iOS, Android, macOS, Linux and WebAssembly, with a live visual designer.
3.4k
Active
From $39/user/mo
2018
#45
AG-UI Developer tools
Open protocol standardizing event-based communication between AI agents and user-facing applications.
3.1k
Active
Open source
#46
Typesense, Inc.Retrieval (RAG)MCP · sign-in
Indexes documents and answers typo-tolerant search queries over a RESTful API, with optional vector and semantic matching.
2.9k
Active
Open source
#47
Churnkey Developer tools MCP · sign-in
Hosted and open-source SDK that runs in-app cancellation flows, failed-payment retries and personalised retention offers for subscription businesses.
2.9k
Active
From $250/mo
#48
Agent Community Marketing MCP · open
Hosts a member directory, events and open mailing lists, and publishes the AID spec for resolving agents from domain names via DNS.
2.8k
Active
2025

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.

How we read every tool → · By INITE Atlas Desk