Zamp vs Sphere

Zamp8.9Visit Sphere8.6Visit

Higher score Zamp #5 in Tax Engine Software 8.9/10 Pricing on request · 30-day trial Free trial✓ 1 of 4 features Visit Zamp

vs

Sphere #8 in Tax Engine Software 8.6/10 Paid ✓ 1 of 4 features Visit Sphere

• Zamp fits best

  U.S. businesses wanting managed tax compliance

• Sphere fits best

  Modern businesses needing broad tax operations

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Side by side

Feature	Zamp 8.9/10 Visit ↗	Sphere 8.6/10 Visit ↗
At a glance
Editor score	8.9	8.6
Ranking	#5 in Tax Engine Software	#8 in Tax Engine Software
Best for	U.S. businesses wanting managed tax compliance	Modern businesses needing broad tax operations
Pricing model	Paid	Paid
Starting price	—	$100/unit/mo
Free plan	—	—
Free trial	30 days	—
Deployment	Cloud	Cloud
Platforms	Web	Web
Support	Email, Phone, Docs	Live chat · 24/7
Integrations	37+ integrations	20 integrations
Built for	Small business, Mid-market	Small business, Mid-market, Enterprise
Features Zamp 1/4 · Sphere 1/4
Real-time calculation	Not checked yet	Not checked yet
API access	✓	✓
Commerce connectors	Not checked yet	Not checked yet
Exemption certificates	Not checked yet	Not checked yet
Specs
Tax jurisdictions	Not checked yet	Not checked yet
Transaction limit	Not checked yet	Not checked yet
Tax types	Not checked yet	Not checked yet
Our review
Pros	13,000+ U.S. jurisdictions with rooftop-accurate calculations Automates nexus monitoring, registration, filing, and remittance Supports 15 accounting, commerce, ERP, marketplace, and billing integrations	Covers monitoring, registration, calculation, filing and remittance Supports sales tax, VAT and GST across web and API Includes 15 integrations for billing, finance, HR and payroll systems
Cons	Plan pricing requires contacting sales The API sandbox is rate-limited and limited to 30 days Canadian tax coverage requires the U.S. + Canada plan	No free plan is available Starter pricing applies per region and is limited to fewer than 10 regions Customs and withholding-tax products are coming soon
Our verdict	Zamp is a managed sales tax compliance platform for growing digital businesses, including e-commerce, SaaS, and digital services companies. It combines rooftop-accurate tax calculation, real-time address validation, product-level… Read the review →	Sphere is an AI-powered tax compliance platform for companies selling across borders. It brings indirect-tax exposure monitoring, tax registration management, real-time tax calculation and automated return filing and remittance into one… Read the review →

Strengths and trade-offs

• Zamp — where it wins

  • 13,000+ U.S. jurisdictions with rooftop-accurate calculations
  • Automates nexus monitoring, registration, filing, and remittance
  • Supports 15 accounting, commerce, ERP, marketplace, and billing integrations

  Where it doesn't

  • Plan pricing requires contacting sales
  • The API sandbox is rate-limited and limited to 30 days
  • Canadian tax coverage requires the U.S. + Canada plan

• Sphere — where it wins

  • Covers monitoring, registration, calculation, filing and remittance
  • Supports sales tax, VAT and GST across web and API
  • Includes 15 integrations for billing, finance, HR and payroll systems

  Where it doesn't

  • No free plan is available
  • Starter pricing applies per region and is limited to fewer than 10 regions
  • Customs and withholding-tax products are coming soon

• Zamp8.9/10 · Pricing on request · 30-day trial

  A managed tax engine for digital businesses that need U.S. compliance coverage and automation.

  Visit ZampFull verdict →
• Sphere8.6/10 · Paid

  A broad tax operations platform with automated filing, registration and real-time calculation.

  Visit SphereFull verdict →