Open-source AI tools293 of 21790 tools
Offered under an open-source licence, per the pricing page; any paid tier is hosting or support.
Describe what you need
betaA 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
Figure and bar: visits/mo, estimate · year: online since
- #52
WordPressMarketing
Open source content management system and website builder with block-based editing and plugin extensibility.
1.1MActiveOpen source2003 - #153
OllamaDeveloper tools
Runs open-source language models locally or in cloud, with API access for coding agents.
193kActiveFrom $20/mo2023 - #165
OpenClawAgents
Open source AI assistant that manages email, calendar, and tasks from chat apps without subscriptions.
182kActiveOpen source - #184
KeployDeveloper toolsMCP · open
Captures production traffic to generate tests and mocks, replaying them to detect regressions.
153kActiveFrom $19/user/mo2021 - #236
OpenCodeDeveloper tools
Open source coding agent that generates code in terminal, IDE, or desktop app with support for multiple LLM providers.
108kActiveOpen source2025 - #259
Continue (Mission Control)Developer tools
Open-source coding agent that assists developers with code generation and refactoring tasks.
91.9kActiveOpen source - #299
Dbt labsAnalytics
Transforms raw data into tested, version-controlled SQL models for analytics and AI pipelines.
74.7kActiveFrom $100/user/mo - #337
CypressDeveloper toolsMCP · sign-in
Runs JavaScript tests inside a real browser against web apps, with replay of failures and a hosted dashboard for CI results.
61.2kActiveFrom $67/mo2014 - #343
Thinking Machines LabKnowledge
Develops AI models and research tools emphasizing human-AI collaboration and customization.
59.5kActiveFrom $0.33 per use2025 - #364
LobeHubProductivity
Organizes and operates multiple AI agents 24/7, handling task scheduling and reporting through your existing chat tools.
51.4kActiveFrom $9.90/mo - #457
Nous ResearchDeveloper tools
Trains and releases open source language models with infrastructure for distributed training.
33.7kActiveOpen source - #492
MariaDBDataMCP · open
Relational SQL database server offered as open-source community edition, self-managed enterprise build, and managed cloud service.
28.7kActiveFrom $0.13 per use - #504
OnyxKnowledge
Open source AI chat platform that searches your docs, apps and knowledge base to answer questions with grounded responses.
27.3kActiveFrom $20/user/mo - #518
Carbon Design SystemMCP · sign-in
Provides reusable UI components, design tokens and guidance for building IBM-style interfaces, plus an MCP server feeding them to AI tools.
26.1kActive1911 - #523
Svelte • Web development for the rest of usDeveloper toolsMCP · open
Compiles HTML, CSS and JavaScript components into minimal browser code, a UI framework that does most of its work at build time.
25.6kActive2016 - #529
Open WebUIDeveloper tools
Self-hosted web interface for running AI models locally with data residency and access control.
25.2kActiveFree plan - #558
AI SDKDeveloper tools
Unified TypeScript SDK for building AI applications with streaming, multi-model support, and fallbacks.
22.6kActiveOpen source - #724
HindsightDeveloper tools
Persistent memory system for AI agents that learns from mistakes and improves decision-making over time.
13.2kActiveFree plan2024 - #775
MedusaDeveloper toolsMCP · sign-in
Open-source commerce backend with modules for products, inventory, multi-warehouse stock, pricing rules and multi-region sales, customised by developers.
11.2kActiveFrom $29/mo2021 - #830
SentientDeveloper tools
Develops open-source tools for AI agents to reason, learn, and improve through benchmarking and evaluation.
9.5kActiveOpen source - #831
TiptapDeveloper tools
Headless editor framework with extensions for real-time collaboration, AI agents, and document conversion.
9.5kActiveFrom $49/mo2023 - #926
DenoDeveloper tools
Fast, open-source JavaScript and TypeScript runtime with built-in tooling, package manager, and Node.js compatibility.
6.9kActiveFrom $20/mo2018 - #942
Sentient FoundationProductivity
Runs a hierarchical planner-executor pipeline over DSPy modules that splits a goal into subtasks, runs them, and verifies the combined result.
6.7k - #1113
MedplumHealthMCP · sign-in
Hosts FHIR-native clinical data storage and workflow automation APIs for building custom healthcare applications.
3.9kActiveOpen source - #1117
freehireCareersMCP · open
Gathers tech job listings straight from employers' own hiring pages, then exposes them through a CLI and MCP server.
3.8kActiveFrom $5/mo - #1161
Uno PlatformDeveloper toolsMCP · open
Open-source framework letting .NET developers ship one codebase to Windows, iOS, Android, WebAssembly and Linux, with a runtime visual designer.
3.4kActiveFrom $39/user/mo2018 - #1211
AG-UIDeveloper tools
Open protocol standardizing event-based communication between AI agents and user-facing applications.
3.1kActiveOpen source - #1232
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.
2.9kActiveOpen source - #1244
ChurnkeyDeveloper toolsMCP · sign-in
Hosted and open-source SDK that runs in-app cancellation flows, failed-payment retries and personalised retention offers for subscription businesses.
2.9kActiveFrom $250/mo - #1249
Agent CommunityMarketingMCP · open
Hosts a member directory, events and open mailing lists, and publishes the AID spec for resolving agents from domain names via DNS.
2.8kActive2025 - #1255
OpenWorkProductivityMCP · sign-in
Desktop app and MCP gateway that runs AI agents on local files and routes requests to 50 model providers.
2.7kActiveFrom $10/user/mo - #1272
DevCycleDeveloper toolsMCP · sign-in
Serves feature flags from an edge network to gate releases, run A/B experiments, and roll out or revert features through OpenFeature SDKs.
2.6kActiveFrom $625/mo2011 - #1282
OpenPetsDeveloper tools
Installs animated desktop pets that react to your coding and integrate with development tools.
2.6kActive - #1295
OpenWisprVoice
Transcribes speech to text locally or via cloud in any application, with meeting notes and AI chat.
2.5kActiveFrom $6.67/user/mo - #1296
AtlariumMCP · open
Browsable reference profiles of aquarium and terrarium species, with water-parameter guides, fertilizer dosing comparisons and identification quizzes.
2.5kActive - #1314
Future AGIAgentsMCP · sign-in
Runs simulated conversations against AI agents, scores their outputs for factuality and safety, and traces live calls to flag regressions.
2.4kActive - #1344
Aave LabsFinanceMCP · open
Lends and borrows crypto tokens through public smart contracts, where suppliers earn interest and borrowers post excess collateral.
2.2kActive2017 - #1351
NocoBaseDeveloper tools
Open source platform for building business systems with no-code interface and integrated AI agents.
2.2kActiveFrom $800 once2021 - #1364
JitsuAnalyticsMCP · sign-in
Collects event data from websites, apps and CRMs and streams it into your data warehouse in real time.
2.2kActiveFrom $99/mo - #1444
Powerful multichain search by BlockscoutLegal
Queries transactions, addresses, tokens and contracts on many EVM chains through a single search box.
1.8kActive - #1536
DayPilotDeveloper toolsMCP · open
Provides JavaScript and framework components for calendar, scheduler, Gantt chart and event views embedded in web applications.
1.5kActive - #1537
RTKDeveloper tools
Filters CLI output noise from AI agent context windows to reduce token usage and improve reasoning.
1.5kActiveFree - #1574
XposedOrNotSecurityMCP · open
Searches indexed data breach records for an email address or domain and reports which breaches, leaked fields and a risk score appear.
1.3kActiveFrom $9/mo2017 - #1604
ClaudeWorldLearningMCP · open
Publishes tutorials, maps and a read-only MCP endpoint that gives coding agents current manuals for Claude Code, Codex and Grok CLI.
1.3kActive - #1615
Blueprints HubDeveloper tools
Hosts community-contributed automation templates combining open source tools and models for developers to explore AI use cases.
1.3kActiveFree - #1637
Blazor Components, Visual Designer & AI Agent SupportCreative & mediaMCP · sign-in
Visual designer and component library that generates standard C# and Razor Blazor apps, with AI coding agents editing the same code.
1.2kActiveFrom $799/user/yr2015 - #1674
OpenUIDeveloper tools
Framework for building agent-driven interfaces that stream live UI components across React, Vue, Svelte, and other platforms.
1.1kActiveFrom $49/mo - #1695
MCP BuilderDeveloper tools
Orchestrates systems of AI agents that work together with unified state management and standardized protocols.
1.1kActiveOpen source
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.