Sphere, a San Francisco, CA-based AI-native cross-border compliance engine for global businesses, has raised $21 million in Series A funding.
Investors
The round was led by Andreessen Horowitz, with participation from Y Combinator and Felicis Ventures.
Andreessen Horowitz (a16z) is a venture capital firm that backs bold entrepreneurs shaping the future through technology. Founded in 2009, the firm manages multiple funds across stages, sectors, and geographies, with over $46 billion in committed capital. a16z invests in seed- to growth-stage companies across AI, bio + healthcare, consumer, crypto, enterprise, fintech, gaming, infrastructure, and companies building toward American dynamism.
Sphere Use of Funds
The company will use the funding to expand its AI tax engine, TRAM, into input tax, withholding, e-invoicing, and tariffs, creating a comprehensive, revenue-based compliance platform.
About Sphere
Founded by Nicholas Rudder, Sphere provides an AI-native compliance engine that automates global indirect tax filings, including VAT, GST, and sales tax. The platform integrates directly with 100+ tax authorities, helping finance teams at global tech companies stay compliant. Sphere’s AI engine continuously codifies international tax rules, offering scalable, automated, and accurate cross-border compliance. Since emerging from stealth in late 2024, Sphere has onboarded numerous global customers, and established native integrations with Stripe Billing and Checkout, as well as the NetSuite SuiteCloud Developer Network.
Funding Details
Company: Sphere, Inc.
Raised: $21.0M
Round: Series A
Funding Date: 2025
Lead Investor: Andreessen Horowitz
Additional Investors: Y Combinator, Felicis Ventures
Company Website: https://www.getsphere.com/
Software Category: AI Cross-Border Compliance / FinTech
Source: https://www.menlotimes.com/post/sphere-raises-21-million-series-a-led-by-andreessen-horowitz