Sphere alternatives
Sphere is AI-native indirect tax software for companies selling across borders, covering sales tax, VAT and GST monitoring, registration, calculation, filing and remittance across 130+ jurisdictions. Backed by Andreessen Horowitz, it names ElevenLabs, Replit, Deel and Ramp as customers.
Teams comparing it usually look at Anrok and Fonoa for cross-border software and digital sales, at Avalara among established providers, at Numeral and Kintsugi among newer automated tools, and at Zamp for a managed service.
What Sphere does
AI-native cross-border indirect tax compliance: sales tax, VAT and GST monitoring, registration, calculation, filing and remittance across 130+ jurisdictions.
- Founder
- Nicholas Rudder (CEO); out of stealth in December 2024
- Funding
- Series A US$21m led by Andreessen Horowitz with Y Combinator and Felicis (November 2025)
- Customers
- ElevenLabs, Replit, Lovable, Deel, Ramp, Framer, Cognition, Runway and Fyxer
- Pricing
- Starter US$100 per region a month (under 10 regions); Growth, for 10+ regions, custom
Alternatives in Tax and Compliance
49 other vendors in this category. Vendors with an Accountio profile are shown first; the rest of the directory follows.
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Sales tax and VAT automation with filing across 190 countries.
Founded 2004 · HQ Durham, US
Avalara profile →Global indirect tax determination and e-invoicing through one API.
Founded 2019 · HQ Dublin, Ireland
Fonoa profile →Sales tax automation built specifically for SaaS companies.
Founded 2020 · HQ San Francisco, US
Anrok profile →Embedded tax estimates, withholding and filing for financial apps.
Founded 2021 · HQ New York, US
April profile →Hands-off US sales tax registration, filing and remittance.
Founded 2022 · HQ San Francisco, US
Numeral profile →Managed US sales tax with registration, filing and audit support.
Founded 2022 · HQ New York, US
Zamp profile →AI sales tax platform automating nexus tracking and filing.
Founded 2022 · HQ San Francisco, US
Kintsugi profile →AI-native platform for automating core accounting operations.
HQ San Francisco, US
Accrual profile →More tax and compliance vendors in the directory
How to choose
- Which taxes do you need covered: US sales tax, VAT and GST, e-invoicing mandates, or corporate and direct tax?
- Do you want software that calculates and files, or a managed service that also handles registrations and notices?
- Does it connect to the billing, e-commerce and ERP systems where your transactions are created?
- How is it priced: by transactions, by filings, by jurisdictions, or a flat fee?
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Common questions
What are the main alternatives to Sphere?+
Anrok and Fonoa are the closest cross-border alternatives. Avalara is the established provider, Numeral and Kintsugi are newer automated tools, and Zamp is a managed service.
How much does Sphere cost?+
Sphere's Starter plan costs US$100 per region a month for under 10 regions and up to 50,000 transactions, with a per-transaction fee above that. Its Growth plan, for 10+ regions, is custom.
Does Sphere work with accounting firms?+
Yes. Accounting and tax advisory firms can refer clients to Sphere or white-label it under their own brand.
Part of Accountio’s accounting technology coverage.
