Startup
Sphere
AI-native global tax compliance for companies selling across borders: sales tax, VAT and GST registrations, calculations, filings and remittance, priced at a flat $100 per region per month.
| Founded | 2022, San Francisco |
|---|---|
| Founders | Nicholas Rudder (CEO and CFO; formerly Macquarie and PwC) |
| Stage | Series A |
| Total funding | $71.5m |
| Last round | Series A, $21m, November 2025, led by Andreessen Horowitz with Y Combinator and Felicis ↗ |
| What it does | End-to-end indirect tax compliance across jurisdictions, expanding into withholding tax, e-invoicing and tariffs under a compliance engine it calls TRAM |
| Traction | Customers include ElevenLabs, Replit, Lovable, Runway AI and Windsurf |
| Pricing | $100 per region per month, all inclusive |
| Markets | Global; US-headquartered |
| Peers | Anrok, Numeral, Fonoa, Avalara, Quaderno |
Why it matters
Sphere raised $21 million from a16z in late 2025 and has signed the AI companies expanding fastest abroad, including ElevenLabs and Lovable. Its flat $100 per region price is a direct challenge to the usage-based pricing of Avalara and Vertex.
Updated September 2026.
Part of Accountio’s accounting technology coverage.
