Home / AI Stack Directory

84 tools. The whole modern AI stack.

Every tool we evaluate, integrate, or build on for clients — from generative AI and computer vision to payments and automation. Filter by how it's delivered (SaaS, PaaS, IaaS, DaaS, FaaS, open source) or what it's for.

By service model
By domain

ChatGPT

SaaS

The most-used AI assistant — drafting, analysis, brainstorming, and custom GPTs.

Best for: Everyday knowledge work across any team

GenAI & ContentFreemium Visit ↗Integrate →

Claude

SaaS

Anthropic's assistant — strong on long documents, careful reasoning, and coding.

Best for: Contract review, reports, complex writing

GenAI & ContentFreemium Visit ↗Integrate →

Google Gemini

SaaS

Google's assistant, woven through Gmail, Docs, and Android.

Best for: Teams already living in Google Workspace

GenAI & ContentFreemium Visit ↗Integrate →

Microsoft 365 Copilot

SaaS

AI layer across Word, Excel, Outlook, and Teams.

Best for: Microsoft-first enterprises

GenAI & ContentPaid Visit ↗Integrate →

Perplexity

SaaS

AI search that answers with citations instead of links.

Best for: Research with verifiable sources

GenAI & ContentFreemium Visit ↗Integrate →

Jasper

SaaS

Marketing-focused content generation with brand voice controls.

Best for: Content teams producing at volume

GenAI & ContentPaid Visit ↗Integrate →

Notion AI

SaaS

AI writing and Q&A inside the Notion workspace.

Best for: Docs-heavy startups and teams

GenAI & ContentFreemium Visit ↗Integrate →

Canva Magic Studio

SaaS

AI design generation for non-designers — social posts, decks, videos.

Best for: SMB marketing without a design team

GenAI & ContentFreemium Visit ↗Integrate →

Midjourney

SaaS

The aesthetic benchmark for AI image generation.

Best for: Brand imagery, concept art, campaigns

Images, Video & VoicePaid Visit ↗Integrate →

Adobe Firefly

SaaS

Image generation trained on licensed content — lower IP risk.

Best for: Commercial brand work needing legal safety

Images, Video & VoiceFreemium Visit ↗Integrate →

Stable Diffusion

OSS

Open-source image generation you can self-host and fine-tune.

Best for: Custom pipelines and full control

Images, Video & VoiceFree Visit ↗Integrate →

Runway

SaaS

AI video generation and editing — text-to-video, effects, cleanup.

Best for: Video marketers and studios

Images, Video & VoiceFreemium Visit ↗Integrate →

Synthesia

SaaS

Studio-quality avatar videos from a script — no camera.

Best for: Training and product-explainer videos

Images, Video & VoicePaid Visit ↗Integrate →

HeyGen

SaaS

Avatar video plus translation and lip-synced dubbing.

Best for: Multilingual sales and support videos

Images, Video & VoiceFreemium Visit ↗Integrate →

ElevenLabs

SaaS

The leading realistic voice synthesis and cloning platform.

Best for: Voiceovers, IVR, and audio content

Images, Video & VoiceFreemium Visit ↗Integrate →

Suno

SaaS

Full-song music generation from text prompts.

Best for: Jingles, background scores, creators

Images, Video & VoiceFreemium Visit ↗Integrate →

GitHub Copilot

SaaS

In-editor AI completion and agent tasks across major IDEs.

Best for: Developer productivity at any scale

Cursor

SaaS

AI-first code editor that reasons across your whole repository.

Best for: Fast-moving product teams

CodingFreemium Visit ↗Integrate →

Replit

PaaS

Build, run, and deploy apps from the browser with AI agents.

Best for: Prototypes and learning to ship

CodingFreemium Visit ↗Integrate →

OpenAI API

PaaS

GPT models, embeddings, images, and speech via API.

Best for: Building AI features into products

LLM Platforms & APIsPaid Visit ↗Integrate →

Anthropic API

PaaS

Claude models via API — long context, strong tool use.

Best for: Agents and document-heavy workloads

LLM Platforms & APIsPaid Visit ↗Integrate →

Google AI Studio

PaaS

Gemini API with a generous free tier — this site's assistant runs on it.

Best for: Startups validating AI features at zero cost

LLM Platforms & APIsFreemium Visit ↗Integrate →

Hugging Face

PaaS

The open-model hub — hundreds of thousands of models, spaces, and libraries.

Best for: Anything open-source AI

LLM Platforms & APIsFreemium Visit ↗Integrate →

OpenRouter

PaaS

One API across dozens of model providers with fallbacks.

Best for: Model flexibility without rewrites

LLM Platforms & APIsPaid Visit ↗Integrate →

Groq

PaaS

Ultra-low-latency inference on custom hardware.

Best for: Realtime chat and voice applications

LLM Platforms & APIsFreemium Visit ↗Integrate →

Together AI

PaaS

Hosting and fine-tuning for open models at scale.

Best for: Open-model production deployments

LLM Platforms & APIsPaid Visit ↗Integrate →

LangChain

OSS

The most-used framework for building LLM applications and agents.

Best for: RAG pipelines and agent orchestration

LLM Platforms & APIsFree Visit ↗Integrate →

AWS Bedrock

IaaS

Managed foundation models inside your AWS environment.

Best for: Enterprises with AWS governance needs

AI InfrastructurePaid Visit ↗Integrate →

Azure AI Foundry

IaaS

OpenAI and other models with enterprise controls on Azure.

Best for: Regulated industries on Microsoft cloud

AI InfrastructurePaid Visit ↗Integrate →

Google Vertex AI

IaaS

End-to-end ML platform — training, tuning, and serving on GCP.

Best for: Data science teams on Google Cloud

AI InfrastructurePaid Visit ↗Integrate →

RunPod

IaaS

On-demand GPUs at hobbyist-friendly prices.

Best for: Fine-tuning and burst GPU workloads

AI InfrastructurePaid Visit ↗Integrate →

Lambda

IaaS

GPU cloud built for training and inference.

Best for: Serious model training runs

AI InfrastructurePaid Visit ↗Integrate →

CoreWeave

IaaS

Hyperscale GPU infrastructure powering major AI labs.

Best for: Large-scale training and inference

AI InfrastructurePaid Visit ↗Integrate →

Replicate

FaaS

Run thousands of models via API, billed by the second.

Best for: Shipping model features without infra

AI InfrastructurePaid Visit ↗Integrate →

Modal

FaaS

Serverless Python with GPUs — deploy functions, not servers.

Best for: ML engineers who hate DevOps

AI InfrastructureFreemium Visit ↗Integrate →

Cloudflare Workers AI

FaaS

Inference at the edge on Cloudflare's network.

Best for: Low-latency AI in web apps

AI InfrastructureFreemium Visit ↗Integrate →

Baseten

FaaS

Production model deployment with autoscaling and observability.

Best for: Serving custom models reliably

AI InfrastructurePaid Visit ↗Integrate →

Roboflow

SaaS

Dataset labeling to deployed vision model in one platform.

Best for: Shipping computer vision fast

Computer VisionFreemium Visit ↗Integrate →

Ultralytics YOLO

OSS

The real-time object detection standard.

Best for: Defect detection, counting, monitoring

Computer VisionFree Visit ↗Integrate →

OpenCV

OSS

The foundational computer vision library.

Best for: Classical vision and preprocessing

Computer VisionFree Visit ↗Integrate →

Amazon Rekognition

PaaS

Vision API — faces, objects, text, moderation.

Best for: Vision features without training models

Computer VisionPaid Visit ↗Integrate →

Google Cloud Vision

PaaS

OCR, labels, and document understanding via API.

Best for: Document and image pipelines

Computer VisionPaid Visit ↗Integrate →

PyTorch

OSS

The dominant deep-learning framework in research and industry.

Best for: Custom model development

ML & Deep LearningFree Visit ↗Integrate →

TensorFlow

OSS

Google's production-grade deep-learning ecosystem.

Best for: Mobile/edge deployment (TFLite)

ML & Deep LearningFree Visit ↗Integrate →

scikit-learn

OSS

The classical ML toolkit — regression to clustering.

Best for: Tabular business problems

ML & Deep LearningFree Visit ↗Integrate →

XGBoost

OSS

Gradient boosting that still wins on tabular data.

Best for: Scoring, risk, and forecasting models

ML & Deep LearningFree Visit ↗Integrate →

MLflow

OSS

Experiment tracking, model registry, and deployment.

Best for: Keeping ML projects reproducible

ML & Deep LearningFree Visit ↗Integrate →

Weights & Biases

SaaS

Experiment tracking and evaluation for ML teams.

Best for: Teams training models seriously

ML & Deep LearningFreemium Visit ↗Integrate →

HF Transformers

OSS

The library behind most modern NLP — one API for thousands of models.

Best for: Any NLP task, any model

NLP & SpeechFree Visit ↗Integrate →

spaCy

OSS

Industrial-strength NLP pipelines — entities, parsing, classification.

Best for: Production text processing

NLP & SpeechFree Visit ↗Integrate →

OpenAI Whisper

OSS

Open-source speech-to-text that handles accents and noise.

Best for: Transcription without per-minute fees

NLP & SpeechFree Visit ↗Integrate →

AssemblyAI

PaaS

Speech-to-text API with summarization and sentiment.

Best for: Call analytics and meeting intelligence

NLP & SpeechPaid Visit ↗Integrate →

Deepgram

PaaS

Fast, accurate realtime transcription API.

Best for: Voice agents and live captioning

NLP & SpeechPaid Visit ↗Integrate →

Gymnasium

OSS

The standard API and environments for reinforcement learning.

Best for: Learning and benchmarking RL

Reinforcement LearningFree Visit ↗Integrate →

Stable-Baselines3

OSS

Reliable implementations of the major RL algorithms.

Best for: Applying RL without reimplementing papers

Reinforcement LearningFree Visit ↗Integrate →

Ray RLlib

OSS

Distributed reinforcement learning at cluster scale.

Best for: Industrial RL — pricing, scheduling, control

Reinforcement LearningFree Visit ↗Integrate →

Unity ML-Agents

OSS

Train agents inside 3D simulations.

Best for: Robotics and simulation-first training

Reinforcement LearningFree Visit ↗Integrate →

Khanmigo

SaaS

Khan Academy's AI tutor that guides instead of answering.

Best for: Schools and self-learners

EdTechFreemium Visit ↗Integrate →

Duolingo Max

SaaS

AI conversation practice and explanations for languages.

Best for: Language learning at scale

Quizizz

SaaS

AI-generated quizzes and lessons from any content.

Best for: Teachers and corporate trainers

EdTechFreemium Visit ↗Integrate →

Coursera

SaaS

University courses with an AI learning coach.

Best for: Upskilling teams affordably

EdTechFreemium Visit ↗Integrate →

Kaggle

DaaS

Datasets, notebooks, and ML competitions.

Best for: Finding data and proving skills

Data & DatasetsFree Visit ↗Integrate →

HF Datasets

DaaS

Hundreds of thousands of ready-to-use ML datasets.

Best for: Training and evaluation data

Data & DatasetsFree Visit ↗Integrate →

Snowflake Marketplace

DaaS

Commercial datasets delivered straight into your warehouse.

Best for: Enterprise data enrichment

Data & DatasetsPaid Visit ↗Integrate →

Alpha Vantage

DaaS

Stock, forex, and crypto market data APIs.

Best for: Market dashboards and research tools

Data & DatasetsFreemium Visit ↗Integrate →

TradingView

SaaS

The standard for charting, screening, and trade ideas.

Best for: Technical analysis and watchlists

Finance & MarketsFreemium Visit ↗Integrate →

Kite Connect

PaaS

Zerodha's trading and market-data APIs.

Best for: Building broking-grade tools in India

Finance & MarketsPaid Visit ↗Integrate →

Sensibull

SaaS

Options analytics — strategy building, Greeks, payoff charts.

Best for: F&O traders who want discipline

Finance & MarketsFreemium Visit ↗Integrate →

Screener.in

SaaS

Fundamental screening for Indian equities.

Best for: Long-term stock research

Finance & MarketsFreemium Visit ↗Integrate →

Alchemy

PaaS

The leading web3 development platform — nodes, APIs, tooling.

Best for: Building on Ethereum and L2s

Blockchain & Web3Freemium Visit ↗Integrate →

Etherscan

SaaS

The Ethereum block explorer and contract verifier.

Best for: Auditing transactions and contracts

Blockchain & Web3Free Visit ↗Integrate →

Chainlink

OSS

Decentralized oracles connecting contracts to real-world data.

Best for: Smart contracts needing external data

Blockchain & Web3Free Visit ↗Integrate →

CoinGecko API

DaaS

Crypto market data across thousands of assets.

Best for: Portfolio and research tooling

Blockchain & Web3Freemium Visit ↗Integrate →

Razorpay

PaaS

India's leading payment gateway — UPI, cards, subscriptions, payouts.

Best for: Accepting payments in India

Stripe

PaaS

Global payments infrastructure with world-class APIs.

Best for: International SaaS billing

Cashfree

PaaS

Payments plus bulk payouts and verification APIs.

Best for: Marketplaces and lending flows

PayU India

PaaS

Enterprise-grade payment processing in India.

Best for: High-volume Indian merchants

HubSpot

SaaS

Free CRM with marketing, sales, and service hubs.

Best for: Inbound lead management

Marketing & Lead GenFreemium Visit ↗Integrate →

Apollo.io

SaaS

B2B contact database with outreach automation.

Best for: Outbound prospecting

Marketing & Lead GenFreemium Visit ↗Integrate →

Mailchimp

SaaS

Email marketing with automation and AI content.

Best for: Newsletters and campaigns

Marketing & Lead GenFreemium Visit ↗Integrate →

Clay

SaaS

AI-powered lead enrichment across 100+ data sources.

Best for: Personalized outbound at scale

Marketing & Lead GenPaid Visit ↗Integrate →

n8n

OSS

Self-hostable workflow automation with AI steps — our automation backbone.

Best for: Business automation you own

AutomationFreemium Visit ↗Integrate →

Zapier

SaaS

The easiest way to connect 7,000+ apps.

Best for: Quick automations, low volume

AutomationFreemium Visit ↗Integrate →

Make

SaaS

Visual automation with strong branching logic.

Best for: Complex flows without code

AutomationFreemium Visit ↗Integrate →

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