PeakCommerce is an AI- and API-first commerce platform for subscription and usage-based businesses, where every order, upgrade, add-on, renewal, and cancellation executes as an agent-native API primitive. It was rebuilt from the ground up so the API is the system of record, not endpoints bolted onto a legacy checkout UI, which means AI agents, CSRs, customers, and partners all transact against the same structured contracts for pricing, catalog, and entitlements. As autonomous buyers and AI agents increasingly transact on behalf of real customers, UI-first commerce tools can't serve them. PeakCommerce inverts that: a single headless commerce API powers conversational commerce, branded and embedded storefronts, self-service customer portals, CSR tools, partner portals, and payment pages from one foundation. PeakCommerce is billing-agnostic. It adapts to Zuora, Stripe Billing, Maxio, Orb, and Metronome, and integrates across CRM, support, analytics, fraud, and identity systems including Salesforce, HubSpot, Zendesk, and Intercom — 60+ integrations, no rip-and-replace. It is the production-ready alternative to Zuora Experiences and to custom-built self-service front ends, without heavy engineering lift. Used by B2B SaaS, media, and technology companies to grow expansion and retention revenue and cut RevOps overhead. Founded in 2016, headquartered in San Diego.