Sphere vs JustPaid
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.
Mountain View AI accounts receivable automation with 24/7 AI agent for invoice-to-cash workflows; YC $3.5M seed backed by DrChrono co-founder competing with Billtrust and YayPay for B2B AR automation.
About
JustPaid is a Mountain View, California-based AI-powered accounts receivable automation platform transforming invoice-to-cash workflows for B2B companies — using AI agents to automate invoice creation, delivery, payment follow-up, and cash application, reducing accounts receivable cycle times and the manual effort that finance teams expend on routine collections. Founded in 2022 by Daniel Kivatinos (co-founder of DrChrono) and backed with $3.5 million in seed funding led by Y Combinator in June 2023 with participation from Dropbox co-founder Arash Ferdowsi, JustPaid serves B2B SaaS and professional services companies with recurring billing and complex payment terms.
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