Pricing comparison
Sphere vs Zamp pricing
Last updated
How does Sphere pricing compare to Zamp? Sphere's Starter is $100/month ($1,200/year); Zamp's U.S. Plan 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
$12,000
Zamp
U.S. Plan
$4,730–$10,194
Mid-Market
250K orders · 200 filings · 20 states · 10 SST · Shopify
Sphere
Starter
$24,000
Zamp
U.S. Plan
$8,633–$14,878
Side by side
| Dimension | Sphere | Zamp |
|---|---|---|
| Entry-tier subscription | Starter: $100/mo · $1,200/yr | U.S. Plan: quote required |
| Per-state filing fee | None | None |
| Per-state registration fee | None | None |
| Per-transaction fee | Charged, rate not published | None |
| Pricing transparency | Transparent | Opaque |
| SST Certified Service Provider | No | No |
| International VAT / GST | Yes | Yes |
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?
- How does Sphere pricing compare to Zamp? Sphere's Starter is $100/month ($1,200/year); Zamp's U.S. Plan 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 transparent on pricing; Zamp is opaque. Translation: you can find Sphere's real prices without a sales call; Zamp requires more back-and-forth with their sales team to get a number you can budget around.
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.