LangSmith
LangChain, Inc. · Prompting, evaluation & observability
LangChain's hosted platform for tracing, evaluating and deploying LLM applications and agents, with prompt tooling, an LLM gateway and cloud, hybrid or self-hosted options
97 tools
LangChain, Inc. · Prompting, evaluation & observability
LangChain's hosted platform for tracing, evaluating and deploying LLM applications and agents, with prompt tooling, an LLM gateway and cloud, hybrid or self-hosted options
Element Labs, Inc. · Local LLM inference & serving
Proprietary desktop app for discovering, downloading and running local LLMs with llama.cpp and MLX engines, a chat UI, an OpenAI-compatible server, CLI, SDKs and a headless daemon
Mapbox, Inc. · GIS & mapping
Commercial mapping platform with vector tiles, map styling, geocoding, directions and SDKs for web, iOS and Android, billed by usage
Massive (Polygon.io, Inc.) · Market & fundamentals data
Market data platform (renamed from Polygon.io in October 2025) with REST and WebSocket APIs, flat files and SQL access for US stocks, options, indices, forex, crypto and futures
MathWorks · Mathematical & statistical computing
MathWorks' commercial numeric computing environment and language for engineers and scientists, with toolboxes, Simulink integration, apps and MATLAB Online
Elsevier · Citation management
Free reference manager from Elsevier with a desktop and web app, PDF annotation, a Web Importer, groups and bundled cloud storage
Microsoft · Productivity suites & task management
Microsoft's subscription suite of Office desktop and web apps, Exchange email, OneDrive, SharePoint and Teams with Copilot and Graph APIs
Microsoft · Cloud & hosting providers
Microsoft's public cloud with virtual machines, AKS, Azure Functions, Cosmos DB, Azure Database for PostgreSQL, Entra ID identity and Microsoft Foundry for hosted AI models
Microsoft · BI & dashboards
Microsoft's business-intelligence suite: free Windows Power BI Desktop for modeling and reports, and the Power BI service in Microsoft Fabric for sharing
Microsoft · Collaboration & communication
Microsoft's chat, meetings and calling hub integrated with Microsoft 365, SharePoint and Entra ID, extensible through Microsoft Graph and Teams apps
Nasdaq, Inc. · Market & fundamentals data
Nasdaq's marketplace for financial, economic and alternative datasets (formerly Quandl) with a REST API, time-series and table endpoints and Python, R and Excel clients
ngrok, Inc. · Tunneling & remote access
Hosted ingress service that exposes local servers through public URLs via an agent or SDK, with Traffic Policy rules, API gateway features and reserved domains
Notion Labs, Inc. · Personal knowledge management
Hosted workspace combining block-based documents, relational databases, wikis and project views, with an API and built-in AI features
Dynalist Inc. (Obsidian) · Personal knowledge management
Local-first Markdown note-taking app with bidirectional links, graph view and a large community plugin ecosystem; optional paid Sync and Publish
OpenAI · Model providers & APIs
OpenAI's hosted developer platform: Responses and Chat Completions APIs, Realtime voice, embeddings, images, audio, fine-tuning, evals and managed agents
Bloomberg L.P. (FIGI Registration Authority) · Market & fundamentals data
Free API and web tool from Bloomberg for mapping tickers, ISINs, CUSIPs and other identifiers to public-domain FIGI instrument identifiers, with search and filter endpoints
OpenRouter, Inc. · Model providers & APIs
Unified API gateway to hundreds of models from many providers with automatic fallbacks, credit-based pass-through billing, BYOK, free models and data-policy routing
OVH Groupe SA · Cloud & hosting providers
European cloud and hosting provider offering dedicated bare-metal servers, public and hosted private cloud, VPS, domains and web hosting from data centers in Europe, Canada and elsewhere
Paperpile LLC · Citation management
Subscription reference manager that lives in the browser and Google Drive, with citation plugins for Google Docs and Word and mobile apps
Pinecone Systems, Inc. · Vector databases
Fully managed, proprietary vector database service with serverless indexes, namespaces, metadata filtering and integrated embedding and reranking
Postman, Inc. · API development & tooling
Commercial API platform for designing, testing, documenting and monitoring HTTP and other APIs through a desktop and web client with cloud-synced workspaces
REALTOR.ca Canada Inc. (Canadian Real Estate Association) · Real estate valuation & property data
Canada's national consumer portal for MLS listings, operated by CREA's REALTOR.ca Canada Inc., with licensed data syndication through the DDF
Gouvernement du Québec — Ministère des Ressources naturelles et des Forêts · Real estate valuation & property data
Official online access to Québec's land register: index of immovables, registered deeds and rights by lot number, run by the provincial government
ResearchRabbit (Litmap Limited) · Literature discovery & review
Literature-discovery app that grows collections of papers through citation and author networks and recommends related work, with a free-forever tier
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