75 open source AI tools. 70 have a free plan. Half of the paid plans start at $25 a month or less. Newest check: 12 Nov 2026.
268 of 721 tools were checked against the vendor's own page in the last 30 days.
| Tool | Price from | Free plan | Runs on | Rating | Checked |
|---|---|---|---|---|---|
| QwenAlibaba's free Qwen chat app for web, desktop and mobile, plus a per-token Model Studio API and open-weight models you can self-host. | -- | Yes | Web · iOS · Android · Mac · Windows | 4.4 | 2 Nov |
| DeepSeekDeepSeek's free chat app and low-cost developer API, running MIT-licensed open-weight models with long context, a thinking mode and image input. | -- | Yes | Web · iOS · Android | 4.3 | 2 Nov |
| Meta AIMeta's free assistant inside Facebook, Instagram, WhatsApp and Messenger, powered by Muse Spark, with Meta One bundles for heavier image and video generation. | $7.99/mo | Yes | Web · iOS · Android | 4.3 | 28 Oct |
| KimiMoonshot AI's chat app and developer API running the open-weight Kimi K3 family, with agent tools, Swarm and up to 1M tokens of context. | $19/mo | Yes | Web · iOS · Android | 4.2 | 2 Nov |
| HeyClickyDesktop AI buddy for Mac and Windows that sees your screen on a hotkey, talks you through any app and runs agents you start by voice. Y Combinator Spring 2026. Free plan, plus Pro and Max. | $20/mo | Yes | Mac · Windows | 4.1 | 11 Nov |
| InngestInngest runs event-driven background jobs and AI workflows with no queue or worker fleet to manage. A Free plan that needs no credit card covers development and small production apps. | $99/mo | Yes | Web | 4.1 | 29 Sep |
| OSSInsightOSSInsight is a free AI-powered GitHub analytics platform by PingCAP analyzing 10+ billion open source events to surface trends, rankings, and developer insights across the ecosystem. | Free | Yes | Web | 4.1 | 20 Sep |
| AlgoliaAI search and retrieval platform powering 1.75 trillion searches annually for 18,000+ businesses with semantic search, vector embeddings, and AI agents. | -- | Yes | Web · iOS · Android · Mac · Windows | 4.0 | 3 Sep |
| AtuinOpen-source shell history with encrypted sync across machines, plus Threads to search and resume coding-agent sessions (32.3k GitHub stars). | Free | Yes | Mac · Windows | 4.0 | 12 Nov |
| ExaSearch API that ranks the web by meaning for AI agents and retrieval pipelines, with Lite, Auto and Deep search modes, an asynchronous research Agent and an official MCP server. A free Starter plan with monthly credits needs no payment method. | $49/mo | Yes | Web | 4.0 | 12 Nov |
| GroqFast open-model inference, now built on NVIDIA-licensed LPU hardware | Free | Yes | Web | 4.0 | 6 Sep |
| Hugging FaceThe AI community building the future. Platform for discovering, sharing and collaborating on machine learning models, datasets and applications. | $9/mo | Yes | Web | 4.0 | 19 Aug |
| OllamaMIT-licensed runtime that runs open-weight LLMs on macOS, Windows and Linux with a local API, plus an optional paid cloud for larger models. | $20/mo | Yes | Web · Mac · Windows | 4.0 | 12 Nov |
| Trigger.devOpen-source TypeScript platform for durable background jobs and AI agents. Checkpoint-resume execution survives crashes and redeploys, auto-retries, real-time traces. Free tier available. | $10/mo | Yes | Web | 4.0 | 22 Sep |
| Mistral AIMistral AI is a Paris-based AI lab building open-weight foundation models such as Mistral Large 4 and the Vibe assistant, with EU-hosted infrastructure. | $14.99/mo | Yes | Web · iOS · Android · Mac · Windows | 3.9 | 10 Oct |
| Cast.aiCast.ai cuts Kubernetes cloud costs 50-70% using automated rightsizing and Spot instance management. Trusted by 2,100+ companies, reached $1B unicorn in 2026. | -- | Yes | Web | 3.8 | 19 Aug |
| ClawvisorOpen-source authorization gateway for AI agents that vaults credentials and enforces purpose-based access control. YC Spring 2026-backed, free cloud trial. | -- | Yes | Web | 3.7 | 19 Aug |
| DosuAI knowledge layer for coding agents. Captures what engineers and agents learn across GitHub, Slack and Notion, shares it via MCP, and auto-syncs docs. Free plan covers public repos only. | $16/mo | Yes | Web | 3.7 | 27 Sep |
| InsForgeOpen-source AI agent backend with 12,800+ GitHub stars: $25/mo Pro, free tier. 2.4x fewer tokens than Supabase MCP on MCPMark v2. YC Spring 2026, 6-person team. | $25/mo | Yes | Web | 3.7 | 5 Sep |
| DBOSOpen-source durable execution library that keeps workflow state in Postgres, with SDKs for five language families and a paid Conductor console. | $99/mo | Yes | Web | 3.6 | 8 Nov |
| KugelAudioEuropean TTS API with fast first-audio latency across dozens of languages, GDPR-compliant EU hosting with zero data retention, and a 78% human-preference win rate over ElevenLabs on German-language tests. Billed per minute, no card required to start. | -- | -- | Web | 3.6 | 26 Sep |
| LanceDBOpen-source embedded retrieval library with a distributed Enterprise lakehouse on the same Lance format; its GitHub repository shows 11.9k stars. | -- | Yes | Web | 3.6 | 12 Nov |
| LangGraphMIT-licensed Python framework for stateful, multi-step AI agents built as graphs, with human-in-the-loop approvals. Library is free; hosted option is paid. | $39/mo | Yes | -- | 3.6 | 30 Oct |
| Mem0Memory layer for AI agents: an Apache-2.0 SDK, a managed Platform and an MCP server, with a free plan and 68.8k GitHub stars. | -- | Yes | Web | 3.6 | 11 Nov |
| CodagCuts AI coding-agent costs by trimming oversized tool results, from test runs to grep output, down to the lines that matter, with the rest kept on your machine. | $499/mo | Yes | Mac · Windows | 3.5 | 9 Nov |
| ShakespeareOpen-source AI website builder. Create with any AI model, export projects, pay for tokens. Launched July 2025, free beta, no subscriptions. | Free | Yes | Web | 3.4 | 19 Aug |
| attention-queueTerminal app that queues every Claude Code session in tmux that needs you as one card at a time, with four checking modes: review, step, quiz, vibe. | Free | Yes | -- | 3.2 | 12 Nov |
| ExecutorMIT licensed MCP gateway with 4.3k GitHub stars that connects Claude Code, Codex and Cursor to your accounts and hosts the tools agents write. | $15/mo | Yes | Web | 3.2 | 29 Oct |
| ZeroxZerox is a free, MIT-licensed library that turns PDFs and 26+ document formats into clean markdown using vision models like GPT-4o, though development appears to have stalled. | Free | Yes | -- | 3.2 | 18 Sep |
| AiderFree, open-source terminal pair programmer that edits your git repo and commits each change; bring your own LLM key. 49,000+ GitHub stars. | Free | Yes | Mac · Windows | -- | 3 Oct |
| AnythingLLMFree MIT-licensed desktop app that chats with your documents and runs agents on local models, no account needed. About 66,700 GitHub stars. | $50/mo | Yes | Web · Android · Mac · Windows | -- | 6 Oct |
| AtomsMulti-agent AI app builder that deploys specialized AI agents (PM, Engineer, Data Scientist) to build full-stack apps from text; plans from free to $100/month. | $20/mo | Yes | Web | -- | 19 Aug |
| BAMLBAML is a free, open-source (Apache-2.0) language with 9,000+ GitHub stars for building type-safe, testable structured LLM outputs and agents. | -- | Yes | Web · Mac · Windows | -- | 17 Aug |
| Bolna AIVoice AI agent platform for Indian-language phone calls, with a no-code studio, REST API, bulk campaigns and an MIT-licensed core on GitHub. | -- | -- | Web | -- | 14 Oct |
| CactusOpen-source engine that runs LLM, speech and vision models on phones and wearables, with 6 language bindings and cloud handoff. | Free | Yes | iOS · Android · Mac | -- | 14 Oct |
| CivitaiCommunity site for sharing AI image and video models, with an on-site generator, LoRA trainer and three paid membership tiers. | $10/mo | Yes | Web | -- | 3 Oct |
| Cloudflare OSCloudflare OS is Cloudflare's open-source, self-hosted AI agent workspace that passed 6,000 GitHub stars within 2 days of its August 2026 launch. | Free | Yes | Web | -- | 17 Aug |
| Confident AILLM evaluation and tracing platform from the DeepEval team, with a free plan, CI regression tests and SOC 2 Type II. | $200/mo | Yes | Web | -- | 15 Oct |
| CrewAIOpen-source Python framework for multi-agent AI, MIT-licensed with about 59.6K GitHub stars, plus the CrewAI AMP platform for building and governing agents. | -- | Yes | Web | -- | 13 Oct |
| Cron AICron AI is a free open-source tool generating cron expressions from plain English descriptions for task scheduling. | Free | Yes | Web | -- | 19 Aug |
| DailyDaily provides WebRTC SDKs and the open-source Pipecat framework for building realtime voice and video AI agents, with 75+ global points of presence. | -- | Yes | Web · iOS · Android | -- | 23 Aug |
| DeeplakeActiveloop's open-source GPU database for AI agents: Postgres interface, multimodal data lake, SOC 2 Type II certified, Apache-licensed core. | $99/mo | Yes | Web · Mac · Windows | -- | 8 Oct |
| fast.aifast.ai is a free nonprofit deep learning course reaching 500,000+ students with practical top-down teaching and open-source fastai library. | Free | Yes | Web | -- | 19 Aug |
| FirecrawlWeb data API for AI agents: search, scrape, crawl and interact, returning LLM-ready Markdown. Open source core with a free plan and an MCP server. | $16/mo | Yes | Web | -- | 3 Oct |
| FLUXFLUX by Black Forest Labs is an AI image generation and editing model family built to keep characters and products visually consistent across dozens of generated variations. | Free | Yes | Web | -- | 19 Aug |
| GeoEvidentGeoEvident is an AI geolocation intelligence platform that identifies locations from photos using computer vision. Designed for OSINT, law enforcement, and investigations. Cloud or on-premise deployment. | -- | -- | Web | -- | 19 Aug |
| GitfluenceGitfluence is a free AI-powered Git command generator converting plain English to Git commands. | Free | Yes | Web | -- | 19 Aug |
| GPT4AllFree MIT-licensed desktop app that runs open-weight LLMs offline, with LocalDocs chat over your own folders. About 77K GitHub stars. | Free | Yes | Mac · Windows | -- | 6 Oct |
| Hunyuan 3DTencent open-weight 3D generation model family (1.0/2.0/3.0) with text-to-3D, image-to-3D, sketch-to-3D, and smart topology: Apache 2.0 license, 3M+ Hugging Face downloads, paid API via Tencent Cloud. | $15/mo | Yes | Web | -- | 26 Aug |
| JanOpen-source desktop app that runs open LLMs offline on Windows, macOS and Linux, with optional cloud models through your own API keys. | Free | Yes | Mac · Windows | -- | 6 Oct |
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