Sales tax, VAT & GST
✦ AI-native
United StatesUnited KingdomEuropeGlobal
Small businessesEnterprise
About Sphere
Proprietary TRAM (Tax Review and Assessment Model); <24h go-live claim; 24/7 Slack support. Series A $21M led by a16z (18 Nov 2025) with YC + Felicis. Customers named: Lovable, Replit, Windsurf, Deel, Eleven Labs. SF HQ per LinkedIn/directories (street thin on homepage). Founded date thin on official site.
TRAM ingests/codifies/monitors global tax law with expert-in-the-loop; blog claims >90% determinations needing no expert edit (✦).
Highlights
- Flat $100/mo per jurisdiction (company blog: no overages, no hidden fees, no long-term contracts)
- Local rails to 100+ tax authorities
- Series A $21M (a16z, Nov 2025)