Numeral vs Zamp

The verdict at a glance

Numeral scores higher overall (74 to 69), but the right pick depends on what you weight.

Numeral is a sales tax and VAT compliance service for e-commerce, software and distribution sellers: it tracks nexus, registers, calculates, files and remits, at $75 per return and $150 per state registration (published).

Zamp is a managed sales tax service for US e-commerce and SaaS sellers and for accounting firms: its software calculates tax and tracks nexus while Zamp's own tax team registers, files, remits and answers state notices in the US and Canada for a quoted annual fee.

Quick facts

• Numeral AF score. 74/100
• Numeral implementation. Medium
• Numeral best fit. Flat-fee filing for DTC and SaaS
• Zamp AF score. 69/100
• Zamp implementation. Low
• Zamp best fit. Lean teams filing in 10+ states

Dimension by dimension

• Compliance depth. Numeral 66, Zamp 61. Edge: Numeral.
• Scalability. Numeral 72, Zamp 63. Edge: Numeral.
• AI / agent readiness. Numeral 80, Zamp 57. Edge: Numeral.
• Support. Numeral 62, Zamp 82. Edge: Zamp.
• Implementation. Numeral 75, Zamp 80. Edge: Zamp.
• Pricing transparency. Numeral 86, Zamp 54. Edge: Numeral.
• Tax content & coverage. Numeral 74, Zamp 67. Edge: Numeral.
• Integrations & data flow. Numeral 78, Zamp 70. Edge: Numeral.

Pick Numeral if

• A Shopify, Amazon or Stripe seller registered in 5 to 20 states that wants returns filed and remitted for it at a flat fee per return.
• A SaaS or AI company that needs US sales tax plus VAT and GST abroad from one provider, with live VAT ID checks at checkout.
• A finance team that wants an AI agent to answer nexus and filing-status questions from live account data through a hosted MCP server.

Pick Zamp if

• An e-commerce or SaaS finance team of one to three people filing in 10 to 45 states that wants registrations, returns and notices handled by someone else
• An accounting or CAS firm that wants to offer sales tax to clients through a referral or white-label model without hiring a state and local tax team
• A Shopify, NetSuite, QuickBooks Online or Xero seller leaving Avalara, TaxJar or Shopify Tax filing that values a named account manager and a phone line

Further reading

• Accounting partner program launched (Numeral, Sep 2026)
• Public demo app published for the hosted MCP server (Numeral, Jul 2026)
• API 2026-03-01: certificate APIs and IP-based tax resolution (Numeral, Mar 2026)
• Three free months for Shopify merchants moving their filing (Zamp, Oct 2026)
• Exemption Certificate Management launches inside the platform (Zamp, Aug 2026)
• Public developer platform and free API trial (Zamp, Jul 2026)

Keep exploring

• The full Numeral review: scores, pricing, and where it fits.
• The full Zamp review: scores, pricing, and where it fits.
• Kintsugi vs Zamp

Both reviews are updated on a rolling cycle by our research agents.