Feature and pricing snapshot as of October 2026. Confirm current pricing on each vendor's site.
| Undercart | Similarweb | Storeleads | PPSPY | Koala Inspector | |
|---|---|---|---|---|---|
| Built for | Shopify store intelligence | Web traffic + digital marketing | Multi-platform lead lists | Dropshipping research | One-store browser checks |
| Traffic data | Rank, est. visits, trend, top markets | Visits, engagement, channels, keywords | Estimated visits + rank | Traffic-source analysis | Traffic + top countries |
| Shopify revenue estimate | Annual + monthly, confidence | None listed for Shopify stores | Estimated sales | 15-day sales report | Paid plan |
| Shopify app detection | ✓ | None listed | ✓ | ✓ | ✓ |
| Ad library data | Meta, Google, TikTok + creatives | Ad intelligence on higher plans | None listed | Ad tracker | Facebook, Instagram, Google |
| API / MCP | Both, every plan | Business/enterprise | Pro ($250/mo)+ | API service | None listed |
| Free option | Revenue checker + 25 stores/mo | Free extension; trial | Limited extension data | Free trial | 15 tokens/mo |
| Entry paid price | $29/mo | $199/mo ($125/mo billed annually) | $75/mo | $39/mo | $22/mo |
Sources: each vendor’s own pricing, product and API pages, checked October 2026. “None listed” means the vendor’s site doesn’t mention it.
Undercart is built around the question Similarweb doesn't answer for Shopify stores: how much does this store sell? Its traffic data is lighter than Similarweb's — a traffic rank, a monthly visits estimate, a rising/steady/falling trend and the store's top markets — but it sits alongside what a traffic tool doesn't show: the ads a store runs on Meta, Google and TikTok, its marketing emails, a revenue estimate (annual first, with a confidence score), best sellers, discounts, product reviews and the app stack. Shopify only.
Storeleads attaches estimated monthly visits, page views and rank to each of its 13.8M active stores across 413 platforms, with estimated sales, apps and contacts. A good fit if you want traffic as one column in a big lead list rather than a deep traffic report.
PPSPY combines traffic-source analysis with a 15-day predicted sales report, an ad tracker and app/theme detection for Shopify stores, with a Chrome extension on every plan. Aimed at product and dropshipping research.
TrendTrack is an ad-intelligence and store-research tool whose store traffic is, by its own description, powered by Similarweb — useful if you want Similarweb's traffic numbers inside a Shopify-focused workflow, next to Meta ad spend from Meta's own data, theme and app detection, email tracking and a free Chrome extension.
Koala Inspector (200,000 Chrome users on the Chrome Web Store) shows a store's traffic and top countries alongside its apps, theme, best sellers and ads, one store at a time. Traffic lookups cost tokens from a monthly budget.
Undercart pairs each store’s traffic rank, trend and top markets with the commerce data a traffic tool doesn’t have — its ads, marketing emails, revenue, best sellers and apps. Browse the top Shopify stores by country, or check one store with the free Shopify revenue checker.
Not as far as its own pages describe. Similarweb's web plans measure traffic, engagement, marketing channels, SEO and ads; its retail and ecommerce analytics cover large retailers and marketplaces such as Amazon, eBay, Etsy and Walmart, and don't address independent Shopify stores. For a Shopify store's revenue you need an estimator like Undercart, Storeleads or PPSPY.
Similarweb's own browser extension is free and is still the quickest way to see a site's visits and traffic sources. For Shopify-specific data, Undercart's free revenue checker shows any tracked store's estimated annual revenue range, theme and apps with no sign-up, and its free plan gives 25 full store profiles a month. Koala Inspector has a free plan with 15 tokens a month.
No. Undercart shows a traffic rank, a monthly visits estimate, a rising/steady/falling trend and the store's top markets. It doesn't break traffic down by channel, referrer or keyword, which is Similarweb's strength. Undercart's depth is elsewhere: ads, marketing emails, revenue, best sellers, discounts and apps for Shopify stores.
Similarweb's self-serve Competitive Intelligence plan is $199 a month, or $125 a month billed annually, for one user and 3 months of history; plans that add SEO and ads cost more, and business and enterprise plans are sales-led. Its browser extension is free.
Get 25 free Shopify store lookups — revenue, apps, ads, emails and traffic trend. No card required.