Sphere
AI-powered sales tax, VAT and GST compliance
Sphere was founded in 2021, is headquartered in San Francisco, United States, lists 1–10 employees, and has $25.3M in recorded funding across 2 rounds.
- Headquarters
- San Francisco, California
- Employees
- 1–10
- Founded
- 2021
- Business Model
- B2B
- Website
- getsphere.com
- Total Funding
- $25.3M
- Last Round
- $21.0M Series ANov 2025
- Rounds
- 2
Totals include recorded grants and other qualifying funding, not just equity. What counts toward funding.
Indexed holds 2 funding rounds and 5 investors for this company. The full record is or through the API.
About
Sphere is an AI-powered cross-border compliance platform. We help companies like Lovable, Eleven Labs, Replit and Windsurf automate their sales tax, VAT, GST compliance obligations. What makes us different to other vendors on the market is: 1. we have spent the last 1.5 years building local rails into 100+ tax authorities in both the US and internationally to properly automate compliance processes, and 2. we've built the world's first AI-native tax engine which ingests, codifies and monitors tax law globally.
Summary
Sphere is an Artificial Intelligence company based in San Francisco, United States, founded in 2021. It lists 1–10 employees. It has raised $25.3M in total across 2 rounds, most recently a $21.0M Series A round in Nov 2025. Investors include Andreessen Horowitz, Felicis Ventures and 20VC.
Tech & App Stack
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Funding History
Nov 2025
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Funding: Seed through Series A. Amounts, valuations, and investors where available.
Investors
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