Early access — everything free while we scale the index

Know what every website is built with

Search a continuously-crawled index of domains by their technology stack — analytics IDs, CMS, frameworks, ad pixels, hosting and 140 other fields per domain.

683,451 domains · 98 detectors · 142 fields / domain

webstackindex.com/browse

cms: Shopify × pixel: TikTok × 683,451 matches

facebook.com 400 Error

microsoft.com 200 Your request has been blocked. This could be due to several reasons.

ezviz7.com —

youtube.com 200 YouTube Google Fonts

akamaiedge.net —

filter

Facet across the whole stack

Combine CMS, frameworks, analytics, ad pixels, hosting and HTTP-level facts in one query.

inspect

140 fields per domain

Every detection with its evidence — IDs, headers, cookies — down to the captured response itself.

export

Take the data with you

CSV and JSON export of any result set, and an API for teams that want it in their pipeline.