SphereTax vs Sales Tax Automation by TaxRex
Two Shopify apps, side by side: detected stores, momentum, reviews, plans, listed features and who runs each. Store counts as of Oct 13, 2026 for SphereTax, Nov 6, 2026 for Sales Tax Automation by TaxRex.
The short answer
- SphereTax lists 9 features Sales Tax Automation by TaxRex’s listing doesn’t mention, including Canada (HST, PST, GST), Custom invoices, EU (VAT).
Head to head
Automated US State sales tax return reports for your store
Momentum
New reviews each month
Review pace is the clearest public read on how fast an app is winning new merchants.
STARTUP
- · $0.05 for every additional order.
- · Economic Nexus Analysis Report
- · Email Support
- · Plan covers 200 orders / month
- · State Nexus wise sales reports
GROWTH
- · $0.04 for additional order
- · Economic Nexus Analysis Report
- · Email Support
- · Multi-store support
- · Plan covers 500 orders / month
- · State wise reports
ADVANCED
- · $0.02 for additional order
- · Economic Nexus Analysis Dashboard
- · Email Support
- · Multi-store support
- · Plan covers 1500 orders / month
- · State wise reports
ENTERPRISE
- · $0.01 for additional order
- · Economic Nexus Analysis Report
- · Email Support
- · Multi-store support
- · Plan covers 10000 orders / month
- · State wise reports
Coverage counts what each App Store listing names. Every feature, checked off app by app, is in Shoplist.
See every featureSphereTax connects your Shopify store to Sphere's sales tax engine. It calculates accurate sales tax at checkout, tracks where your sales create filing obligations, and prepares and files returns in every jurisdiction where you're registered, with remittance handled for you.
Empower your Shopify e-commerce business with Tax Rex - our seamless all-in-one sales tax solution. From crafting accurate sales tax reports to timely filing on state portals, we've got you covered. Our economic nexus dashboard ensures you never miss a new state's threshold, helping you register in new US states with ease. Focus on growth; we'll handle the tax headaches. Simplify tax compliance today.
- Real-time sales tax calculation at checkout across US/International jurisdiction
- Automated return preparation and filing in every registered state.
- Tax remittance handled end to end.
- Timely Autofile: Ensure on-time tax return filings while you focus on business
- Accurate Tax Reports: Precise sales tax reports tailored to state's requirements
- Economic Nexus Alerts: Stay informed on new state nexus thresholds
- Effortless State Registration: Simplified new state registration for compliance
All the numbers
Every figure, side by side
A green dot marks the app ahead on a measured figure. Estimates, gaps and apps that leave no storefront trace never take the lead.
Adoption
| Measure |  SphereTax |  Sales Tax Automation by TaxRex |
|---|---|---|
| Detected stores | Not published | Not published |
| Net store change, 28 days | 0 | 0 |
| Stores added, 28 days | Not enough data | Not enough data |
| Big-brand share | Not enough data | Not enough data |
| Top store categories | Not published | Not published |
| Top store countries | Not published | Not published |
Reviews
| Measure | SphereTax | Sales Tax Automation by TaxRex |
|---|---|---|
| App Store rating | Not published | 5.0 ★ |
| App Store reviews | Not published | 135 |
| New reviews, 28 days | Not enough data | 5 |
| Reviewers a year or more in | Not enough data | 44% |
Pricing
| Measure | SphereTax | Sales Tax Automation by TaxRex |
|---|---|---|
| Free plan | Not listed | Not listed |
| Lowest paid monthly plan | No monthly plan listed | $10/month |
| Longest free trial | Not listed | 15 days |
| Plans listed | Not published | 4 |
Listing
| Measure | SphereTax | Sales Tax Automation by TaxRex |
|---|---|---|
| Shopify category rank | #102 | #7(ahead) |
| Shopify App Charts | Not on this week’s charts | #1 on Climbers in Taxes |
| Built for Shopify | No | Yes |
| Launched | Sep 24, 2026 | Sep 23, 2021 |
| Languages | 1 | 1 |
| Developer | Sphere | TaxRex Inc |
FAQ
SphereTax and Sales Tax Automation by TaxRex: common questions
- What features does each app list that the other doesn’t?
- SphereTax lists 9 the others don’t mention, such as Canada (HST, PST, GST), Custom invoices, EU (VAT), Exemption managment. Sales Tax Automation by TaxRex lists 2 the others don’t mention, such as Data export, SST filing. A feature missing from a listing may still be supported; this compares what each App Store listing says.
- Where does this comparison’s data come from?
- Shoplist crawls Shopify storefronts to detect which apps each store runs, and reads each app’s Shopify App Store listing for reviews, pricing, features and integrations. Store counts are as of Oct 13, 2026 for SphereTax, Nov 6, 2026 for Sales Tax Automation by TaxRex; estimated figures are labeled.
How Shoplist compares apps
Store counts come from Shoplist’s crawl of Shopify storefronts, which detects the apps each store runs; they are as of Oct 13, 2026 for SphereTax, Nov 6, 2026 for Sales Tax Automation by TaxRex. Reviews, ratings, plans, features and integrations come from each app’s Shopify App Store listing. 28-day figures are labeled when estimated, and a figure that is missing or estimated never decides who leads. Read the methodology.