Sphere vs Greenboard
Side-by-side comparison of AI visibility scores, market position, and capabilities
SF YC W22 AI global tax compliance at 30%+ MoM growth since Dec 2024 launch; $25.3M total ($21M a16z Series A Nov 2025) with Stripe native integration serving Deel/Replit/Eleven Labs/Lovable competing with Avalara for automated multi-jurisdiction...
About
Sphere is a San Francisco-based AI-powered global tax compliance platform — backed by Y Combinator (W22) with $25.3 million in total funding including a $21 million Series A in November 2025 led by Andreessen Horowitz with Felicis and Y Combinator, following a $4.3 million seed — providing technology companies and global businesses with automated sales tax, VAT, and GST monitoring, registration, calculation, filing, and remittance across 100+ global tax jurisdictions through direct integrations with tax authorities and a proprietary AI Tax Rules and Analysis Model (TRAM) that continuously codifies global tax rules as they change. Launching from stealth in December 2024, Sphere has achieved 30%+ average monthly revenue growth and serves customers including Deel, Replit, Eleven Labs, Lovable, Windsurf, and HeyGen as one of only three tax vendors with native Stripe integration.
AI compliance operations platform for fintechs and RIAs covering KYE, communications archiving, and risk surveillance; $4.5M from Base10, YC, and General Catalyst protecting billions in client assets.
About
Greenboard is a San Francisco-based AI-native compliance operations platform for fintechs, private funds, and wealth managers — providing a unified system for Know Your Employee (KYE) compliance, employee trade surveillance, communications archiving, risk detection, and regulatory reporting that replaces the fragmented legacy tools that financial services compliance teams currently use. Founded in 2023 and backed by Base10 Partners, Y Combinator, and General Catalyst with $4.5 million in seed funding raised in May 2024, Greenboard protects billions in client assets for financial services firms.
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