BT Bloomberg L.P. (FIGI Registration Authority) · Market & fundamentals data
Bloomberg's subscription workstation for market data, news, analytics, messaging and execution, with Excel integration and the BLPAPI library for C++, Java, .NET and Python
Proprietary Paid Enterprise Local Nov 2, 2026B Bruno Software · API development & tooling
Open-source, offline-first API client that stores collections as plain-text .bru files in a Git repository, with a CLI for running requests in CI
MIT Open source Free Local Nov 2, 2026D Discord Inc. · Collaboration & communication
Community chat platform with servers, text and voice channels, video, forums and a bot API, free to use with optional Nitro subscriptions
Proprietary Freemium Paid Nov 2, 2026H Hoppscotch · API development & tooling
Open-source API client that runs in the browser or as a desktop app, supports REST, GraphQL and realtime protocols, and can be self-hosted for teams
MIT Open source Free Local Self-hosted Nov 2, 2026M3 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
Proprietary Paid Enterprise Local Nov 2, 2026P 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
Proprietary Freemium Paid Local Nov 2, 2026T Doist Inc. · Productivity suites & task management
Cross-platform task manager from Doist with natural-language scheduling, projects, labels, filters, shared projects and a public REST API
Proprietary Freemium Paid Nov 2, 2026Z Zoom Communications, Inc. · Collaboration & communication
Video meetings and webinar platform, now packaged as Zoom Workplace with team chat, phone, whiteboard, AI Companion and developer APIs and SDKs
Proprietary Freemium Paid Nov 2, 2026