WhatStack

What it does

Quickly discover the tech stacks and SDKs behind popular mobile apps. See if your favorite apps use React Native, Flutter, Firebase, Stripe, and more. Perfect for developers, marketers, and researchers.

• 
  StartupStack2014 · ▲156

  Find the startups that use your favorite tech stack

• 
  Realm React Native2016 · ▲137

  The fastest database for cross platform mobile apps

• 
  RevealStack2024 · ▲105

  Unveil the technology behind websites

• 
  React Native2015 · ▲362

  Build native mobile experiences with Javascript

• 
  Flutter2018 · ▲268

  Build beautiful native apps in record time

• 
  Moment 3.02016 · ▲255

  Track what apps you use the most on iOS

• 
  Browzer▲431

  Put your technical content on autopilot

  Growth · 16d ago · trybrowzer.com

• 
  Tapflow 2.0▲1,127

  Turn your docs into sellable guides, playbooks, workflows

  Work · 2025 · tapflow.ai

• C9
  Clippy – 90s UI for local LLMs▲1,122

  Life & fun · 2025 · felixrieseberg.github.io

• 
  Appwrite Sites▲990

  Appwrite 2.0 brings a new engine, a rebuilt Console, five database types, an S3 API, an OAuth 2.1 server, and organization-level Domains and Firewall.

  Dev tools · 2025 · appwrite.io

• 
  AI Meeting Notes by Notion▲964

  Perfect meeting memory in Notion

  AI · 2025 · notion.com

• 
  Den▲948

  Multiplayer AI agent builder

  AI · 2025 · getden.io

• 
  Raycast for iOS▲865

  Powerful productivity on the go

  AI · 2025 · raycast.com