HTSAlert vs Flexport tariff tools
Flexport's tariff simulator is a web calculator: you search by product name or upload an HTS code and get a real-time duty calculation for that moment. HTSAlert is a different kind of tool entirely — it watches the specific codes you import, checks official data every single day, and tells you the instant a rate changes, with the effective date and the governing trade action attached. A calculator answers 'what's the rate right now?'. A monitor answers 'did anything change since yesterday, and what do I do about it?'. Both questions matter; this page compares them honestly, using only what Flexport states on its own site.
| Dimension | HTSAlert | Flexport |
|---|---|---|
| Product focus | Per-code tariff CHANGE monitoring — checked daily, alerted on a diff | A web-based duty calculator for a point-in-time lookup, per their own siteSource: tariffs.flexport.com (checked 2026-08-15) |
| How you search | You add the HTS codes you already know to a watchlist | Search by product name or upload HTS codes to see real-time duty calculations, per their own siteSource: tariffs.flexport.com (checked 2026-08-15) |
| Free access | Free plan: 5 watched codes, daily monitoring, email alerts, no card required | Their page shows a 5-search free limit ('0 / 5 free searches') with a prompt to sign up for unlimitedSource: tariffs.flexport.com (checked 2026-08-15) |
| Paid pricing | Public and self-serve: Starter $19/month, Pro $49/month, Broker $129/month | The price of their unlimited/paid tier is not publicly stated as of 2026-08-15Not publicly stated |
| Trade-action coverage stated on their page | Section 301, Section 232, and IEEPA overlays resolved and stacked automatically on your watched codes | Section 232 is explicitly covered (their examples: unmanned aircraft systems, polysilicon); Section 301 and IEEPA are not mentioned on their page as of 2026-08-15 — an absence of mention, not a confirmed absence of coverageSource: tariffs.flexport.com (checked 2026-08-15) |
| Ongoing monitoring or alerts | Daily automated diff against official USITC/Federal Register data, with email and Telegram alerts | Not mentioned on their page; a 'Tariff updates' changelog exists, but whether individual users are notified of changes isn't statedSource: tariffs.flexport.com (checked 2026-08-15) |
| Legal framing | Informational tariff monitoring only — not customs or legal advice, per our own disclaimer | Their own disclaimer states the tool 'does not constitute legal, tax, customs, or professional advice ... and Flexport is not acting as your customs broker, attorney, or advisor'Source: tariffs.flexport.com (checked 2026-08-15) |
Flexport descriptions reflect their public positioning — see www.flexport.com for their current offering.
The job to be done is different
A calculator and a monitor solve adjacent but distinct problems. Flexport's simulator is built for the moment you need a number: you're quoting a shipment, sizing a landed cost, or sanity-checking a broker's figure, and you want an answer now, searchable by product name if you don't already know the HTS code. HTSAlert is built for the days after that moment: once you know which codes you import, it checks them every day so a rate change never arrives as a surprise on an entry you've already filed against the old number.
The two are naturally complementary rather than competing head-on. A team could reasonably use Flexport to size a new shipment and HTSAlert to keep watching the codes it already relies on — the comparison here is about which job each tool was actually built for, not which tool is 'better' in the abstract.
What Flexport's own page says about trade-action coverage
Flexport's site explicitly names Section 232 coverage, with worked examples for unmanned aircraft systems and polysilicon. It does not mention Section 301 or IEEPA anywhere on the page as of the date this comparison was checked. That is worth stating precisely: a page not mentioning something is evidence the page doesn't say it, not evidence the underlying tool can't do it. We are not claiming Flexport lacks 301 or IEEPA support — we are reporting exactly what their own page states and does not state, because guessing in either direction would be a fabricated claim.
HTSAlert's stacked-rate model resolves all three programs — Section 301, Section 232, and IEEPA — for every watched code, and shows which Chapter 99 subheading applies to each active overlay. Some of those subheadings can't be resolved by code alone: heading 9903.91.14, under U.S. note 31(l)(i) to subchapter III of chapter 99, adds a 100% IEEPA duty on ship-to-shore gantry cranes of Chinese origin or containing specified Chinese content, but only if the goods actually match that description — otherwise no additional duty applies under that heading at all. HTSAlert surfaces that as a condition to resolve, not a guessed percentage.
When Flexport is the better choice
If your question is 'what would this shipment cost right now', and you'd rather search by product name than look up an HTS code first, Flexport's calculator is the right tool for that moment — it's free for a handful of searches and doesn't require signing up for a subscription. A standalone monitoring tool doesn't replace a quick point-in-time lookup, and this page won't pretend it does.
Where Flexport is the better choice
- Flexport's calculator lets you search by product name, not only by HTS code — useful when you don't already know your classification.Source: tariffs.flexport.com (checked 2026-08-15)
- Flexport offers free searches with no signup required before hitting their stated 5-search limit.Source: tariffs.flexport.com (checked 2026-08-15)
- Flexport carries the brand recognition of an established freight-forwarding and logistics operator, which some searchers will weight before trying a narrower, lesser-known monitoring tool.Not publicly stated
HTSAlert stacks Section 301, Section 232, and IEEPA duty programs automatically for every HTS code on a watchlist that starts at 5 codes free and scales to 25 codes on Starter at $19 a month, 100 codes on Pro at $49 a month, or 300 codes on Broker at $129 a month. Some Chapter 99 headings depend on the goods themselves rather than the code alone: heading 9903.91.14 adds a 100% IEEPA duty on ship-to-shore gantry cranes of Chinese origin or containing specified Chinese components, under U.S. note 31(l)(i) to subchapter III of chapter 99, but only when the goods match that description — otherwise no additional duty applies. HTSAlert shows this as a condition for the filer to resolve rather than a single guessed percentage, and checks every watched code daily against official USITC and Federal Register data, alerting on any change with the legal effective date attached.
Frequently asked questions
Does HTSAlert replace Flexport's tariff simulator?
No. Flexport's simulator is a point-in-time duty calculator you search by product name or HTS code; HTSAlert is a daily monitor for codes you already track. Many importers could reasonably use both — one for sizing a new shipment, the other for watching the codes already in production.
Does Flexport monitor rate changes over time?
Their own page doesn't say. There's a 'Tariff updates' changelog, but whether individual users are notified when a rate changes on a specific code isn't stated. HTSAlert's entire product is that notification: a daily diff against official data with email and Telegram alerts.
What does Section 232 coverage on Flexport's page mean for me?
It means their calculator can compute Section 232 duties for the examples they cite, such as unmanned aircraft systems and polysilicon. Their page doesn't mention Section 301 or IEEPA, which is a statement about what their page says, not a confirmed gap in their tool — verify directly with Flexport if that distinction matters for your shipment.