
Zonos
Avalara
CodeHTS
TariffCheck
Import Cost Calculator
Tariff Calculator by Synnax Studio
LandedClear
Free import duty lookup with official US, EU, UK, and China tariff rates. Search by HS code or product to see duty, VAT, and de minimis thresholds. Every rate links to its official source. Updated 2026.

The modern platform for creating, sharing, and collaborating on AI prompts. Advanced version control and real-time testing.

Website, pricing, platforms and company facts side by side.
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| Website | tariffpedia.com | diffyn.com |
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| Company | 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


TariffPedia is a free import duty and HS code lookup tool for importers, e-commerce sellers, and freight forwarders who need quick, accurate tariff rates without digging through government portals. Search by HS code or product description to see duty rates, VAT/GST, and de minimis thresholds for...
No description of Diffyn yet.
What each product offers, as listed by its team.


An editorial look at what each product does well and who it suits.


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The Ultimate Prompt Tool for Creators – Visualize & Organize with Diffyn
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As answered by people managing TariffPedia and Diffyn.
Diffyn's answer:
Addresses workflow and change management on LLM prompts, provide teams with traceability and visualization of tests across multiple models, provide deeper understading into efficiency of these prompts.
Diffyn's answer:
Diffyn is the platform that specializes on both change management and multi-model analysis.
Diffyn's answer:
React, Next.js, POSTGRESQL
Diffyn's answer:
Professionals incorporating LLMs or AI tools in their workflow and wants to keep track of changes and test their prompts.
Diffyn's answer:
I started working on Diffyn when I notice that prompting has become an essential part of work across many industries. While there are version control platofrms like github, they are not designed for just prompt management are can be overkill such applications, it is also not integrated natively with various LLMs and relevant tools for users to validate ideas and visualise results properly.
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When comparing TariffPedia and Diffyn, you can also consider the following products.

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AI-powered global tariff classification & import duty calculator. HS, HTS, HTSUS, EU TARIC, UK Commodity, Canada, Australia & Singapore HS codes with Section 301 and USMCA built in.
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Instantly estimate US import duties, Section 301 tariffs, and total landed cost for any product from any country. Free AI-powered tariff calculator updated for 2026.
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Free calculator for China-to-USA import duties, landed cost per unit, and a GO / TIGHT / NO-GO profit verdict.
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Easily calculate US import duties and customs tariffs with our real-time Tariff Calculator. Look up HS codes, simulate costs, and stay ahead of trade regulations.
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