Compare
HTSBase and the alternatives
Published pricing, how you sign up, and what each tool covers. Facts come from each vendor's public pages, checked October 2026. Where a page does not say, we write "not published". Each page also says when the other tool is the better pick.
| Tool | Best for | Signup | Published starting price |
|---|---|---|---|
| HTSBase | Developers and sellers who want U.S. and EU landed cost from one self-serve API, starting free. | Self-serve | $0, 250 calls a month, no overage |
| Zonos | Online stores selling cross-border that want duties and taxes quoted and guaranteed at checkout. | Sales-gated | $2 per order plus 10% of duties, taxes and non-Zonos fees |
| Easyship | Ecommerce shippers who want shipping rates, labels, tax and duty and HS codes from one shipping platform. | Self-serve | No monthly fee; Tax and Duty $0.11 a call, HS Code $0.05 a call |
| Avalara | Mid-size and large businesses that already use Avalara for tax and want cross-border duty in the same platform. | Sales-gated | Quote only, not published |
| SimplyDuty | Small sellers and developers who want a low-volume duty calculator and classification API with monthly plans in pounds. | Self-serve | GBP 0.10 per classification or duty calculation call |
| Tariffs API | Developers who already know their HTS codes and need U.S. import duty with Chapter 99 stacking. | Self-serve | $99 a month ($74 a month billed yearly), 1,000 calls |
| Flexport Tariff Simulator | Importers who want a quick, free estimate of U.S. duty for an HTS code and origin, without an API. | Free, no account for basic use | Free, up to 10 lookups without an account |
| USITC HTS search | Anyone who needs the official U.S. tariff schedule text and rates, free. | Free | Free |
Prices change. Follow the source link on each page before you decide. If something here is out of date, tell us at support@htsbase.com and we will fix it.