Sphere
AI-native global tax compliance — sales tax, VAT, GST automation across 100+ jurisdictions via TRAM AI engine. $21M Series A from a16z (Nov 2025).
Overview
Sphere is an AI-native platform for global sales tax, VAT, and GST compliance, automating registration, calculation, filing, and remittance across more than 100 jurisdictions. Its proprietary TRAM (Tax Review and Assessment Model) engine is trained on tax codes worldwide and automatically classifies products and services across thousands of categories, cutting down manual tax research work for finance teams. The platform can be set up in under 24 hours and integrates natively with Stripe, Campfire, and other modern billing platforms. Sphere is aimed at fast-scaling, cross-border SaaS and AI-native companies that have outgrown lighter compliance tools or find legacy providers like Avalara too heavy for their stack; customers include Lovable, Replit, and ElevenLabs, and the company is backed by investors including a16z.
Details
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