HTS Hero vs SimplyDuty
SimplyDuty is a handy global API at a low price. For US imports, HTS Hero gives you the detail that matters: every Chapter 99 tariff itemized, past entry dates and Duty Over Time.
No demo, no sales call, no contract. Last checked .
Which should you use?
Choose HTS Hero if
Our pick for most importers- Your imports come into the US and you need each tariff itemized
- You want to audit past entries and see duty across revisions
Choose SimplyDuty if
- You need duty estimates for many destination countries through an API
HTS Hero and SimplyDuty, feature by feature
What each tool offers a US importer, from its public website.
| Feature | Our toolHTS HeroFree, then from $14.99/mo | SimplyDutyFrom £9.99/mo |
|---|---|---|
| Free to tryYou can calculate a real duty without paying. | YesFree to start, no sign-up | Partly5 calculations a day, registration required |
| Start without a demo or sales callSign up and use every plan yourself, with no demo, contract or freight account. | YesEvery plan is self-serve, with no demo or contract | Yes |
| Pricing publishedEvery paid plan's price is on the website. | Yes | YesIn GBP |
| Every Chapter 99 tariff, line by lineThe base rate plus Section 232, Section 301 and every other additional duty, each as its own line with exemptions applied. | YesEach tariff on its own line, with its Chapter 99 heading and legal note | NoUS additional tariffs as one layer |
| Trade agreements and preference programsClaim USMCA, CAFTA-DR, KORUS and other programs and see the preferential rate. | YesUSMCA, CAFTA-DR, KORUS and every program on the line | PartlyUSMCA not modeled |
| Exemption questions that change the dutyAnswer the facts that unlock exemptions (metal content, generics, donations and more) and see the new total. | YesAnswer each question and see the new total | No |
| Audit past entries by dateCalculate the duty that applied on an entry date, to check what you paid. | YesEntry audits, with verified rates back to April 2026 | No |
| Duty over timeSee how a product's duty changed across HTS revisions. | YesDuty Over Time, revision by revision | No |
| Alerts when a tariff change hits your productsLoad your catalog once and hear when a change affects it, with the duty impact on each product. | Paid planTariff Tracker alerts, with the cost to each product | No |
| Compare countries of originThe same product's duty from several countries, side by side. | Yes | No |
| Bulk upload (CSV)Add many products at once. | Paid planTariff Tracker | Paid plan |
| HTS classification helpGuidance to find and document the right HTS code for a product. | Paid planHTS Hero Classify, with CROSS rulings | Paid plan£0.10 per call |
| API, MCP and ERP/TMS integrationGet tariff results inside your ERP, TMS, internal tools or AI assistant. | On requestAPI and MCP; plugs into ERP, TMS and internal tools | Paid planFrom £9.99/mo |
| Public changelog of rate updatesA dated record of every change to the tool's tariff data. | Yes | PartlyLast US update May 29, 2025 |
What actually sets them apart
US depth versus global breadth
SimplyDuty covers 100+ destinations. HTS Hero covers one, the US, in depth: the base rate plus each Section 232, Section 301 and other Chapter 99 tariff, with exemptions and fees.
What each one costs
Free, then from $14.99/mo
Free to start, no sign-up. Tariff Calculator $14.99/mo for unlimited calculations. Tariff Tracker from $49/mo for your product catalog. Classification from $39/mo. Monthly plans, no contract, 10% off annually.
From £9.99/mo
5 free calculations a day after registering. Basic £9.99/mo (100 API calls), Start-up £49.99, Professional £99.99, Enterprise £499.99, or £0.10 per call.
Plug HTS Hero into your ERP, TMS and internal systems
Get every tariff, exemption and fee for an import wherever you price, plan or file: in your ERP, your TMS, your own tools or an AI assistant. We'll set it up with you.
- Tariff results by API, for your ERP, TMS or internal tools
- An MCP server, so AI assistants can calculate duty
- The same line-by-line results as the calculator
Switching from SimplyDuty? Try HTS Hero free.
Enter an HTS code and a country of origin and see the full US duty: the base rate, every Chapter 99 tariff and the fees. When you need unlimited calculations, it's $14.99 a month.
- Free to start, no sign-up: every tariff on your import, line by line
- Published prices, monthly plans, no contract
- No demo, no sales call, no freight account
- Start in about a minute
Questions
Is SimplyDuty free?
Registered users get 5 free calculations a day. Paid plans start at £9.99 a month for 100 API calls.
Compare HTS Hero with other tools
- The best US tariff calculators in 202612 tools, ranked and compared
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- HTS Hero vs Avalara AvaTax Cross-BorderCross-border duty and tax API for ecommerce
- HTS Hero vs Zonos Landed CostLanded cost at checkout for cross-border ecommerce
- HTS Hero vs GingerControlFree calculator with paid compliance tools
- HTS Hero vs Gateway Tariff CalculatorFree calculator from a freight forwarder
- HTS Hero vs TariffsAPITariff API with a free calculator
- HTS Hero vs AMZ Prep Tariff CalculatorFree calculator from a 3PL
HTS Hero makes one of the tools on this page. We checked every claim about other tools against their public websites on October 6, 2026 and link our sources below. If something has changed, email [email protected] and we'll update it.
Sources
The official documents this article is based on