Amplitude sells a digital analytics platform that helps product, marketing, engineering, and data teams understand how users engage with their digital products and apps. The core product, Amplitude Analytics, tracks user behavior in real-time — clicks, navigation paths, purchases — and lets teams build funnel, cohort, and retention analyses to understand what's driving engagement. Around this core, Amplitude has expanded into adjacent products: Session Replay (visual reconstruction of user sessions), Feature Experimentation and Web Experimentation (A/B testing), Guides and Surveys (in-product tours and feedback), and Audience Activation (a CDP capability for audience targeting). Amplitude sells primarily to enterprises with digital products across financial services, media, e-commerce, healthcare, and B2B software, and counts 27 Fortune 100 companies among its customers. Amplitude reaches customers through direct sales, a free Starter tier that drives self-serve adoption, and a partner ecosystem. Revenue is nearly all subscription-based, priced on volume of behavioral event data ingested. Amplitude uses a land-and-expand model — customers typically start with Analytics, then expand to additional products and teams, with management estimating a 2x–3x spend increase as customers move to the full platform. Nearly two-thirds of ARR comes from enterprise customers, and 74% of ARR comes from multiproduct customers. Amplitude is also embedding AI throughout the platform, including AI agents that monitor dashboards and surface insights, and natural language querying tools that allow users to query Amplitude data without learning the product's UI.