Alternatives · Ecommerce shopper identification
Sorted by the job you hired Opensend for. WhoLayer is one option; it isn't the right one for everyone, and we say when.
Checked November 4, 2026. Every competitor figure links to its source.
Acquired
Opensend acquired Fueled, a first-party event pipeline, in March 2026. [4], November 4, 2026
Themes from public reviews and the vendor's own pages, attributed to where they were reported.
WhoLayer
Website visitor identification (person-level for US traffic, company-level free), Shopper ID for Klaviyo, and contact data through a REST API and MCP server, from one credit wallet.
Free plan with 100 credits a month; paid plans from $49 a month.
Good fit if you want
Customers.ai
Identity resolution, audience suppression, and Meta Conversions API tools for Shopify brands using Klaviyo. [5], November 4, 2026
Website pricing not public (priced by Klaviyo profile count); Shopify app plans from $199 a month [6] third-party, November 4, 2026
Good fit if you want
Wunderkind
Enterprise retail marketing platform: an identity network plus triggered email, SMS, and ads. [9], November 4, 2026
Not public [9], November 4, 2026
Good fit if you want
The quickest way to know is to try it on your own traffic. The Free plan includes company-level identification and monthly credits, no card needed.
Competitor information is from public sources as of November 4, 2026 and may have changed. Trademarks belong to their owners. WhoLayer wrote this page; if something here is wrong, tell us and we'll fix it.
Ready when you are
Install one tag. Your first 100 identified people are free, no card needed.