Pricing comparison
Sphere vs Zamp pricing
Last updated
How does Sphere pricing compare to Zamp? Sphere's Starter is $100/month; Zamp's U.S. is quote-only.
Sphere vs Zamp: typical pricing
Annual cost for two common ecommerce profiles. Both assume Shopify, monthly filing cadence, annual billing, and a typical $120 AOV. Run the calculator to plug in your own numbers.
SMB
50K orders · 120 filings · 10 states · 5 SST · Shopify
Sphere
Starter
From $12,000
At 10 regions you are past Sphere's published Starter tier, which covers fewer than 10 regions. Sphere routes 10+ regions to a quote-only Growth tier with no published price, so this figure is the Starter rate extended as a floor, not a quote. +3 more
Zamp
U.S.
$4,730–$10,194
Zamp does not publish dollar pricing for paid plans. Ranges inferred from aggregator commentary and third-party comparison pages. +2 more
Mid-Market
250K orders · 200 filings · 20 states · 10 SST · Shopify
Sphere
Starter
From $24,000
At 20 regions you are past Sphere's published Starter tier, which covers fewer than 10 regions. Sphere routes 10+ regions to a quote-only Growth tier with no published price, so this figure is the Starter rate extended as a floor, not a quote. +3 more
Zamp
U.S.
$8,633–$14,878
Zamp does not publish dollar pricing for paid plans. Ranges inferred from aggregator commentary and third-party comparison pages. +2 more
Side by side
| Dimension | Sphere | Zamp |
|---|---|---|
| Entry-tier subscription | Starter: $100/mo[A] ↗ | U.S.: quote required[C] ↗ |
| Per-state filing fee | None | None |
| Per-state registration fee | None | None |
| Per-transaction fee | Charged, rate not published | None |
| Pricing transparency | Partial | Opaque |
| SST Certified Service Provider | No | No |
| International VAT / GST | Yes | Yes |
Source confidence: A = vendor pricing page, B = help center, C = third-party aggregator, G = estimated. Per-transaction, transparency, and SST rows are structural, not dollar figures.
About
Sphere
Fast-growing SaaS and digital businesses with global customers; strong fit for AI-native companies like Lovable, Replit, ElevenLabs, Runway AI
Full Sphere pricing breakdown →About
Zamp
Mid-market ecommerce and SaaS that want a fully managed ("done-for-you") sales tax service instead of self-serve software
Full Zamp pricing breakdown →Frequently asked questions
- How does Sphere pricing compare to Zamp?
- Sphere's Starter is $100/month; Zamp's U.S. is quote-only.
- Which is cheaper, Sphere or Zamp?
- Sphere publishes a starting price ($100/mo); Zamp doesn't publish entry-tier pricing, so a real head-to-head means getting a quote from Zamp first.
- Are Sphere or Zamp SST certified?
- Neither. Without SST certification, you'll pay full per-filing fees in every state, including the 24 SST member states.
- Do Sphere and Zamp both support international VAT and GST?
- Yes. Both extend beyond US sales tax. Sphere covers 100 countries; Zamp covers 70.
- Does Sphere or Zamp charge per filing?
- Neither one does. Both bundle filings into the subscription; cost scales with volume rather than per-state count.
- Who is each one built for?
- Sphere targets Fast-growing SaaS and digital businesses with global customers; strong fit for AI-native companies like Lovable, Replit, ElevenLabs, Runway AI. Zamp targets Mid-market ecommerce and SaaS that want a fully managed ("done-for-you") sales tax service instead of self-serve software. The fit question matters more than the price one. Buy the product that actually covers your situation.
- Is Sphere or Zamp more transparent on pricing?
- Sphere is partial on pricing; Zamp is opaque. Translation: Sphere shows more; Zamp requires more back-and-forth with their sales team to get a number you can budget around.
Sources
Every Sphere and Zamp figure on this page traces back to one of the sources below. Confidence ratings are explained on the methodology page.
- [1]ASphere PricingAccessed August 18, 2026
- [2]DSphere raises $21M Series A led by a16zAccessed August 18, 2026
- [3]DTop 8 Leading Sales Tax Compliance Software in the US (2026)Accessed May 11, 2026
- [4]AZamp PricingAccessed August 18, 2026
- [5]ACertified Service Providers List, Streamlined Sales Tax Governing BoardAccessed August 18, 2026
- [6]ATired of Paying for Every Home Rule City Filing?, ZampAccessed May 12, 2026
- [7]CTaxJar vs. Zamp: Pricing, Features, & More, NumeralAccessed May 12, 2026
- [8]CZamp Reviews 2026, G2Accessed May 12, 2026
Want a number specific to your business? The calculator ranks all eight providers, including Sphere and Zamp, by what they'd actually cost given your volume, state footprint, and SST eligibility.