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Measured on six things

Search eBay, Vinted, Mercari and 100+ marketplaces at once

Speed

Desktop Lighthouse 94/100 with 87ms TBT and zero layout shift. Mobile drags: 66/100 with a 10.2s LCP and 2.6s FCP — the mobile hero is heavy. No user lag complaints found in collected evidence.

Screenshots

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BuyHub

About this app

BuyHub is a search engine for collectors and resellers that covers more than 100 marketplaces worldwide, such as eBay, Vinted, Mercari, Facebook Marketplace, Yahoo Auctions, Kleinanzeigen and Xianyu. Features: - Search more than 100 marketplaces in 110 countries from a single interface. - Radars that keep searching for you around the clock and notify you the moment a matching item is listed, in your browser and on your phone. - Several search terms across several marketplaces at the same time, with duplicates dropped. - Every result translated into your language, with prices converted to your currency. - Filters the marketplaces do not offer: positive and negative keywords, seller country, listing date. - Saved searches you can open with one click. - Auction alarms that warn you hours or minutes before an auction ends. BuyHub works on the web, as a browser extension for Chrome and Firefox, and as an Android app (iPhone coming soon).

Key features

1Search 100+ marketplaces across 129 countries from a single search box, with translation and currency conversion.
2Radar alerts that watch for matching listings 24/7 and notify via browser and phone, with configurable check frequency.
3Multi-term search with duplicate dropping, plus advanced filters (seller country, listing date, include/exclude words) and auction alarms.

Target customer profile

Drawn from the product itself, not from a survey.

Demographic

Collectors (e.g., sneakerheads, card collectors, vintage toy enthusiasts)

Pain points

Searching multiple marketplaces manually is time-consuming and misses listings.

Primary needs

A single search across all marketplaces with alerts for new items.

Demographic

Resellers and flippers

Pain points

Need to find underpriced items quickly before competitors.

Primary needs

Real-time alerts and advanced filters to spot deals.

Demographic

Second-hand shoppers

Pain points

Good second-hand offers are spread across many marketplaces, countries and languages.

Primary needs

Compare listings from many marketplaces in one place, translated and in their own currency.

Scout Review

Written by AI from measured evidence, scored out of 100.

BuyHub is a cross-marketplace search engine for collectors and resellers, covering 100+ marketplaces in 129 countries with Radar alerts, multi-term search, translation, currency conversion, and auction alarms. The marketing site is polished and honest (the hero is labeled a simulation), the free tier is real, and the guides are substantive. Security headers are strong (12/13) and accessibility is 97/100 with one contrast fix needed. The weak spots are mobile speed (10.2s LCP) and the absence of any published compliance or pen-test documentation — notable given that Linked Accounts stores marketplace credentials. Growth potential is solid: a specific audience, a real problem, and clear edges over PicClick and Swoopa.

Measure by measure

Usability

Real free tier (eBay/Catawiki/Amazon + 1 alert), a detailed plan comparison table, an FAQ, and per-marketplace guides. Onboarding-to-value path is clear; the multi-account Linked Accounts feature adds setup complexity.

Design

Judging the marketing site: clean, modern, well-branded with a live-looking results grid and marketplace logo wall. The hero is explicitly a simulated example, and app-store UI polish is unverified from this evidence.

Speed

Desktop Lighthouse 94/100 with 87ms TBT and zero layout shift. Mobile drags: 66/100 with a 10.2s LCP and 2.6s FCP — the mobile hero is heavy. No user lag complaints found in collected evidence.

Security

Strong header hygiene: HTTPS+HSTS, CSP, frame protection, Referrer-Policy, Permissions-Policy, SPF and DMARC all present (12/13). Secure-cookie flag not detected; no SOC 2/ISO/pen-test page found, so compliance is unverified.

Accessibility

Lighthouse accessibility 97/100 with a single failing audit (color contrast). Multi-language site, web + extension + Android coverage. No public WCAG statement found; keyboard and screen-reader support not independently verified.

Growth

Real, specific problem (cross-marketplace hunting for collectors/resellers) with concrete edges over PicClick (eBay-only) and Swoopa (local-only): 100+ marketplaces, translation, currency, Radar. Early stage (domain ~0.4y, Twitter only) — context, not the score.

Improvement areas

Mobile performance: 10.2s LCP is a real conversion killer for a product pitched on speed.
Security transparency: no SOC 2, ISO, pen-test, or bug-bounty page despite Linked Accounts storing marketplace credentials.
Accessibility polish: one failing contrast audit and no public WCAG statement or keyboard-navigation documentation.

Design & Usability

The marketing site is polished and confident: a live-feeling results grid, a 100-marketplace logo wall, and feature cards for Radar, multi-term search, and Linked Accounts. The honesty of labeling the hero 'Simulated items and prices' is refreshing but also a tell — you're seeing a mockup, not the app. Usability is where BuyHub earns its keep: a real free tier (eBay, Catawiki, Amazon + 1 alert), a detailed plan comparison table, an FAQ covering cancellation and plan switching, and per-marketplace step-by-step guides for eBay and Vinted. The onboarding path from landing page to first search is short. The friction is in Linked Accounts — signing into multiple stores inside the app is powerful but adds setup and trust burden that a casual second-hand shopper may not clear.

Speed & Security

Speed is a split verdict. Desktop Lighthouse lands at 94/100 with 87ms total blocking time and zero layout shift — genuinely snappy. Mobile is the problem: 66/100 with a 10.2-second largest-contentful paint and 2.6s first contentful paint, which is long enough that a mobile user could bounce before the hero renders. For a product whose pitch is 'find it before competitors,' a slow mobile first paint undercuts the promise. Security is a pleasant surprise for an indie tool: HTTPS with HSTS, CSP, frame protection, X-Content-Type-Options, Referrer-Policy, Permissions-Policy, plus SPF and DMARC — 12 of 13 checklist items. The gap is the secure-cookie flag and the absence of any SOC 2, ISO, pen-test, or bug-bounty page. Given that Linked Accounts stores marketplace credentials, that missing compliance layer is the one thing a cautious buyer will notice.

Accessibility & Growth

Accessibility scores 97/100 on Lighthouse with a single failing audit: insufficient color contrast. That's a fixable flaw, not a structural one, and the site's multi-language support plus web/extension/Android coverage show real reach. No public WCAG statement or keyboard-navigation documentation was found, so screen-reader support is unverified. Growth is the most interesting dimension. BuyHub names a real, specific problem — collectors and resellers manually hunting across 100+ marketplaces in 110 countries — and it has concrete differentiators against its listed alternatives: PicClick is eBay-only visual search, Swoopa is local-marketplace alerts. BuyHub's cross-marketplace coverage, translation, currency conversion, Radar alerts, and auction alarms are a genuine wedge. The pricing ($8.25–$24.92/mo annual) targets serious collectors who already pay for tools. The limit: the domain is ~0.4 years old and the only listed social profile is Twitter, so traction is unproven — but the idea itself has room to grow if execution holds.

Conclusion

If you're a collector or reseller who's tired of tab-hopping between eBay, Vinted, Mercari, and Kleinanzeigen, BuyHub is aimed squarely at you and the free tier is a low-risk way to test the premise. The paid plans ($8.25–$24.92/mo annual) are reasonable for the workflow they replace. Before committing to Linked Accounts, weigh the convenience against the lack of published security certifications. And if you're mobile-first, expect a slow first paint — the desktop experience is where BuyHub currently shines.

Suggestions for improvement

Fix the mobile LCP (10.2s) — compress or lazy-load the hero media; a product about speed shouldn't be slow to paint.
Publish a security/compliance page: SOC 2 status, pen-test summary, or at minimum a clear data-handling doc for Linked Accounts.
Fix the single failing contrast audit — a darker foreground color would push accessibility from 97 to near-perfect.
Add an accessibility statement and keyboard-navigation notes; multi-language support is already there, document the rest.

How we score

Alternatives comparison

Named competitors, point by point. Nobody paid to appear here or to be left out.

	BuyHub	PicClick	Swoopa
Marketplace coverage	100+ marketplaces across 129 countries	eBay listings only	Facebook Marketplace, Craigslist, OfferUp and local marketplaces
Real-time alerts / radars	Radar alerts, 1–30 min frequency by plan, browser + phone	No dedicated alert system; visual search browsing	Deal alerts for local marketplaces
Translation & currency conversion	Titles translated to your language, prices in your currency	Not offered	Not offered
Advanced filters (seller country, listing date, include/exclude words)	Yes — positive/negative keywords, seller country, listing date	eBay-native filters only	Basic deal filters
Free tier	eBay, Catawiki, Amazon + 1 alert at 30-min frequency	Free to browse	Free tier available
Platforms	Web, Chrome/Firefox extension, Android (iOS coming)	Web	Web