Feature and pricing snapshot as of mid-2026. Vendor pricing changes frequently — confirm current numbers before buying.
| Undercart | Storeleads | BuiltWith | Koala Inspector | Panoramata | |
|---|---|---|---|---|---|
| Best for | Shopify revenue + API | Multi-platform lists | Web-wide tech | One-store spying | Marketing creatives |
| Store / brand coverage | ~2M Shopify | 13M+ / 400+ platforms | 26M+ ecommerce | One at a time | 4,000+ brands |
| Revenue estimate + confidence | ✓ | Estimate | Attribute | Estimate | — |
| Ad presence data | ✓ | — | Spend attr. | Running ads | Ad creatives |
| Email / SMS creative history | — | — | — | — | ✓ |
| Full tech-stack detection | ✓ | ✓ | ✓ | ✓ | — |
| REST API | ✓ | Pro tier | Paid tiers | — | — |
| MCP endpoint for agents | ✓ | — | — | — | — |
| Chrome extension | ✓ | ✓ | ✓ | ✓ | — |
| Free option | 25 lookups/mo | Limited preview | Single lookup | ✓ | Limited |
| Entry paid price | $29/mo | ~$75/mo | ~$295/mo | ~$22/mo | $89/mo |
Sources: each vendor’s pricing and product pages, mid-2026. Figures are approximate.
Selling to Shopify merchants? Lead with Undercart for confidence-scored revenue, ad presence and an API/MCP your tools can call. Its Shopify-only scope is the whole point: depth over breadth.
Prospecting across many platforms? Storeleads or BuiltWith give you the widest net. Use Storeleads for store lists and app history, BuiltWith for any-technology fingerprinting across the web.
Doing quick, manual competitor checks? Koala Inspector is free and instant in the browser. Studying campaigns?Panoramata’s email, SMS and ad-creative archive is unmatched. None of these replace a queryable database, so pair them with Undercart or Storeleads when you need scale.
There is no single winner — it depends on the job. Undercart is best for live Shopify revenue estimates with confidence scoring, ad data and an API/MCP for agents. Storeleads is best for the largest multi-platform store database and app-history list building. BuiltWith is best for web-wide technology lookup. Koala Inspector is best for free one-store spying. Panoramata is best for email, SMS and ad-creative intelligence.
Undercart has a free tier of 25 store lookups per month. Koala Inspector has a free Chrome extension, and BuiltWith offers a free single-site technology lookup. Panoramata has a limited free tier, and Storeleads offers a free account that shows a limited preview of each store.
Undercart offers a REST API and an MCP endpoint on paid plans plus pay-as-you-go credits. Storeleads offers an API on its Pro tier. BuiltWith offers technology and lists APIs on paid tiers. Koala Inspector and Panoramata do not offer a general store-data API.
Undercart makes revenue a first-class output: a composite estimate from catalog size, product pricing, ad spend, tech stack and social signals, weighted by confidence, benchmarked against a truth set, and LLM-verified for very large numbers. Storeleads and Koala Inspector also show revenue/sales estimates but expose less about per-store confidence.
Often, yes. Many teams pair a broad database (Storeleads or BuiltWith) with a deep Shopify tool (Undercart) and a browser spy extension (Koala Inspector) for ad-hoc checks. Start with the one that matches your primary workflow and add others only when a gap appears.
Undercart is built for it: a REST API and an MCP endpoint let agents query Shopify store intelligence directly with one API key, filtering on any resolved signal. That agent-first access is the main reason to choose it over browser-only tools like Koala Inspector.
25 free Shopify store lookups on Undercart — revenue, stack, ads and contacts. No card required.