AI Apps Directory

Community directory for discovering Model Context Protocol servers.

mcp.so is a community-driven directory that collects and organizes third-party MCP (Model Context Protocol) servers so developers can browse, share, and integrate external tools for AI apps. It ranks servers by real call volume with a "Call Ranking" leaderboard and offers Featured, Latest, Official, and Hosted filters. The project is open-source and still in preview.

GPT-powered AI tutor for conversational language practice.

Talkpal is an AI language-learning app that lets you hold open-ended voice and text conversations with a GPT-powered tutor across 80+ languages. It adapts to your level, corrects grammar and pronunciation in real time, and offers roleplays, debates, and topic-based practice. A free tier allows limited daily practice, with Premium removing limits.

An AI assistant that lives inside your messaging apps.

Poke is a personal AI assistant from Interaction that works through the chat apps you already use — Apple Messages, WhatsApp, Telegram, and RCS — rather than its own app. It connects to email, calendar, and 30+ services to draft replies, manage your inbox, schedule, track health, and run proactive automations called "recipes." Most non-real-time use is free; for heavier use you negotiate a monthly price with its AI before subscribing.

ByteDance's free AI assistant for chat, writing, and documents.

Doubao (豆包) is ByteDance's consumer AI assistant for everyday Q&A, content creation, document processing, translation, coding help, and multimodal interaction. Core features — dialogue, basic creation, document summarization, and translation — are free with no ads or paywalls. It runs on ByteDance's own Doubao models and is the most-used AI chatbot in China.

OpenAI's coding agent across terminal, IDE, web, and ChatGPT.

Codex is OpenAI's agentic coding tool that reads, edits, and runs code on your behalf. It spans a local terminal client (the open-source Codex CLI), a VS Code extension, a cloud agent that executes tasks in isolated containers with full repo access, and a surface inside ChatGPT. It runs on OpenAI's Codex-tuned models and can parallelize multiple agent tasks at once.

Open-source annotation platform for vision AI datasets.

Data-labeling suite for images, video, and 3D: bounding boxes, polygons, segmentation, keypoints, and object tracking, with AI-assisted labeling via SAM and custom models through its API and SDK. Ships as the MIT-licensed Community edition to self-host, the hosted CVAT Online with free and paid plans, or a self-hosted Enterprise tier.

AI-native collaborative notebook for data teams.

Collaborative data notebook positioned as a drop-in Jupyter replacement: real-time multiplayer editing, SQL + Python + R blocks, warehouse integrations (Snowflake, BigQuery, Redshift), and notebooks that deploy as data apps and dashboards. Deepnote AI generates, fixes, and explains code, and an agent can run analyses autonomously.

Energy-first AI cloud and gigawatt-scale AI data centers.

Vertically integrated AI infrastructure company: Crusoe Cloud offers NVIDIA and AMD GPU clusters with managed Kubernetes and managed inference, while its data-center arm develops and powers gigawatt-scale 'AI factories' — including OpenAI's 1.2 GW Stargate campus in Abilene, Texas, which Crusoe built and co-owns.

Full-stack AI cloud for training and inference at scale.

AI-native cloud built around large NVIDIA GPU clusters — bare-metal and virtualized H100 through Blackwell hardware with InfiniBand networking, managed Slurm and Kubernetes, high-speed storage, and MLOps tooling. Its Token Factory layer adds managed per-token inference for open-weight models. Microsoft signed a five-year capacity deal with Nebius worth up to $19.4B.

Always-listening AI companion pendant that texts you about your day.

Friend is a wearable AI companion: a microphone pendant that listens to your day over Bluetooth and sends proactive, personality-driven comments and conversation through its iOS app. The $129 device is a one-time purchase with no subscription, and a free web chatbot lives at friend.com. It does not speak aloud — replies arrive as text messages.

Voice cloning, audio watermarking, and deepfake detection in one platform.

Resemble AI spans both sides of synthetic voice: generating it and policing it. The platform offers voice cloning and text-to-speech built on its Chatterbox models, real-time audio watermarking, and Detect, a multimodal deepfake detector covering audio, image, and video. It deploys in the cloud or fully on-premises for regulated environments.

AI voice generator studio with 200+ voices, dubbing, and a low-latency TTS API.

Murf AI is a text-to-speech platform pairing a studio editor — 200+ voices across 35+ languages, voice cloning, dubbing, and a voice changer — with developer APIs. Its Gen 2 speech model focuses on pronunciation accuracy and granular voice controls, while the Falcon API targets sub-130ms latency for real-time voice agents. Integrations include Canva, PowerPoint, and Google Slides.

The Superintelligence Cloud — on-demand GPUs, 1-Click Clusters, and superclusters.

Lambda is a GPU cloud for AI training and inference, spanning on-demand HGX B200 and H100 instances, self-serve 1-Click Clusters, and single-tenant superclusters built on NVIDIA's latest generations. A GPU specialist since 2012, it sells compute by the hour without long-term hyperscaler contracts and co-engineers large deployments with NVIDIA.

The AI hyperscaler — GPU cloud built for large-scale training and inference.

CoreWeave is a purpose-built AI cloud renting large-scale NVIDIA GPU capacity for training and inference, layered with managed Kubernetes, AI object storage, and Mission Control observability. Public on Nasdaq since March 2025, it counts most leading AI labs — including OpenAI, Meta, and Anthropic — among its customers, with a contracted revenue backlog reported near $100B in 2026.

Native vector storage and querying in S3 — serverless, billion-vector scale.

Purpose-built vector storage inside Amazon S3: store and query up to two billion vectors per index across thousands of indexes per vector bucket, with S3's durability and elasticity and no clusters to manage. Frequent queries return in around 100ms and infrequent ones in under a second, and it plugs directly into Amazon Bedrock Knowledge Bases for RAG. You pay only for storage and queries.

Royalty-free sample platform with generative AI tools that pay the original creators.

The leading royalty-free sample marketplace, now with generative AI built around its licensed catalog. Variations creates new versions of any Splice sample (structure, key, BPM), Craft turns samples into playable instruments, and Magic Fit adapts sounds to your session's harmonic and rhythmic context — and the original sample creator is compensated each time their sound seeds a generation. Integrates with major DAWs via VST3/AU plugins, with desktop and mobile apps.

AI email chief of staff — screens your Gmail, drafts replies, briefs you twice a day.

An AI email assistant that screens your inbox so only messages needing your response get through, drafts replies in your voice straight into your drafts folder, and summarizes everything else in a twice-daily brief. You can chat with it like a chief of staff — giving standing instructions for how kinds of email should be handled. Works with Gmail and Google Workspace accounts.

AI prototyping for product teams — generate UI in your own design system.

An AI design tool that turns prompts into working UI prototypes product teams can test with users and hand to engineering. Version 2.0 imports components from Figma, Storybook, or any website via its Chrome extension, so generated screens match your real design system rather than generic mockups. Includes real-time collaboration and a free tier to start.

The world's most popular language app, now AI-first with Video Call practice and AI-built courses.

The gamified language-learning platform that has rebuilt itself around AI: its proprietary Birdbrain model personalizes exercise difficulty, generative AI authored the 148 new courses launched in a single day in 2025, and paid subscribers practice speaking through Video Call with Lily, an AI character that remembers prior conversations. Core learning stays free with ads; Super and Max subscriptions unlock the advanced AI features.

Japanese-first AI transcription and meeting notes across web, mobile, and Chrome.

An AI transcription platform from Tokyo-based Notta Inc. that captures live meetings, uploaded recordings, and in-person conversations, then produces summaries and action items. It is strongest in Japanese — the market it was built for — with support for dozens of other languages, real-time translation, and capture via web, mobile apps, and a Chrome extension. A free tier exists but caps recording length per session.

AI-native contract lifecycle management used by legal teams at OpenAI, L'Oréal, and the AP.

A contract lifecycle management platform where legal and business teams draft, negotiate, store, and query agreements. Its Jurist AI assistant reviews and redlines contracts agentically against your playbooks, while AI clause classifiers and conversational search work across the whole repository. Pricing is custom enterprise quoting rather than published tiers.

B2B support platform unifying Slack, email, and in-app channels with AI agents.

A support platform built specifically for B2B companies, unifying shared Slack and Teams channels, email, in-app chat, and community into one workspace for support, success, and engineering teams. AI agents draft and resolve responses grounded in your knowledge base, with ticketing, SLAs, and a customer portal layered on top. Plans start at $59 per seat per month with a three-seat minimum.

Atlas humanoid, Spot quadruped, and Stretch logistics robots from the dynamics pioneer.

The Hyundai-owned robotics company behind the Atlas humanoid, the Spot quadruped, and the Stretch warehouse robot. The production electric Atlas debuted at CES 2026, with its first fleets committed to Hyundai's Metaplant and Google DeepMind and factory deployment in Savannah targeted by 2028. Spot and Stretch are already sold commercially for industrial inspection and logistics.

AI SOC analysts that autonomously investigate and triage security alerts 24/7.

Dropzone AI puts autonomous AI analysts inside the security operations center: agents that investigate alerts end-to-end across phishing, endpoint, network, cloud, identity, and insider-threat domains without a human in the critical path. It connects to existing tools like Splunk, CrowdStrike, Microsoft Defender, and AWS Security Hub via API, deploying in about an hour, and reports 300+ deployments including UiPath and Zapier.