Zamp review

Zamp sells sales tax as a managed service rather than software you run yourself. Its free tier gives a one-time nexus analysis, a historical liability estimate, a product taxability review, a 30-minute call with a senior tax professional and a rate-limited 30-day API sandbox. The U.S. plan adds rooftop-accurate calculation, ongoing nexus monitoring with alerts at 80% of a threshold, automated state registrations, AI-assisted return preparation, direct ACH remittance, early-filing discount capture and notice handling by former state auditors. The U.S. + Canada plan adds GST, HST, PST and QST calculation, registrations and filings. Under the Zamp Commitment, the company covers penalties or interest caused by a Zamp-managed calculation or filing. Zamp connects to Shopify, NetSuite, Business Central, QuickBooks Online, Xero and Stripe among 30+ integrations. It does not publish prices and says each plan is scoped to your states, entities and history, so get a written quote to compare.

Who it is for

Growing ecommerce and SaaS companies that want an outside team to own US and Canadian sales tax compliance.

Price

See vendor pricing (USD check pending); Free assessment tier, U.S. and U.S. + Canada plans quoted on a call.

US price check pending. See the vendor pricing page.

Key features

• Rooftop-accurate calculations with real-time address validation
• Nexus monitoring with 80% early-warning alerts and automated registrations
• AI-powered filing with direct ACH remittance and early-filing discount capture
• Daily state portal monitoring and expert notice resolution
• 30+ integrations, including Shopify, NetSuite, QuickBooks Online, Xero and Stripe

Strengths and weaknesses

• Strength: Zamp covers penalties and interest from its own calculation or filing errors
• Strength: No per-transaction fees
• Strength: Free tier includes a one-time nexus analysis and a 30-day API sandbox
• Weakness: No published prices for paid plans
• Weakness: Paid plans require a sales call
• Weakness: Canadian coverage needs the higher U.S. + Canada plan

Key facts

• Free tier: One-time nexus and taxability assessment
• Integrations: 30+
• Teams served: 1,200+ finance and accounting teams

Where it ranks

Zamp is No. 6 in our Best Sales Tax Software verdict.