Compare · Ecommerce shopper identification
Customers.ai in one line: Identity resolution, audience suppression, and Meta Conversions API tools for Shopify brands using Klaviyo. WhoLayer identifies website visitors (person-level for US traffic, company-level free) and offers contact data through an API and MCP server, all from one credit wallet, starting with a free plan with 100 credits a month. Pick Customers.ai if you need meta Conversions API with persistent click IDs.
Checked November 4, 2026. Every Customers.ai figure links to its source.
| Customers.ai | WhoLayer | |
|---|---|---|
| Positioning | Identity resolution, audience suppression, and Meta Conversions API tools for Shopify brands using Klaviyo. [1], November 4, 2026 | Website visitor identification, ecommerce shopper ID, and contact data for teams and AI agents. |
| Person-level visitor ID | Yes, for ecommerce and B2B visitors [1], November 4, 2026 | Yes, US traffic only (1 credit per person, charged once a month); company-level worldwide (free) |
| Ecommerce | Yes, with Klaviyo and Shopify [1], November 4, 2026 | Yes: Shopper ID sends identified US shoppers to Klaviyo (2 credits per new shopper, 1 credit for shoppers already in your Klaviyo), Growth plan and up |
| API | Yes (Visitor ID API) [4], November 4, 2026 | Yes: REST API with an OpenAPI 3.1 spec |
| MCP server | None mentioned on its developer page [4], November 4, 2026 | Yes: a data MCP server with 13 tools, plus a public docs MCP server with 5 |
| Pricing model | Configured quote based on total Klaviyo profiles, including suppressed and unsubscribed [3], November 4, 2026 | Monthly or annual plans with credits from one wallet for every product; overage between $0.045 and $0.060 a credit on paid plans |
| Entry price | Website pricing not public (priced by Klaviyo profile count); Shopify app plans from $199 a month [2] third-party, November 4, 2026 | Free plan with 100 credits a month; paid plans from $49 a month |
WhoLayer's column is generated from our live pricing and API limits. See pricing and the MCP docs.
An honest list. If one of these is what you need, it may be the better pick.
Each identified US shopper arrives in Klaviyo as a profile plus a "WhoLayer Shopper Identified" event you can trigger flows from. Charged once per new shopper; shoppers already on your list cost half and are never duplicated, and bounces and spam complaints within 30 days are refunded.
Visitor ID, Shopper ID, the Data API, and the MCP server draw from the same credits, and every credit cost is listed on the pricing page. Misses aren't charged.
Opted-out and suppressed people are never returned, delivered, or charged. Global Privacy Control signals are honored, and the rules we enforce are published as a machine-readable policy.
Monthly plans stop at the end of the billing period, and you can set a hard monthly spend cap so overage never surprises you.
Customers.ai's published entry price, next to WhoLayer's plans.
Customers.ai
Website pricing not public (priced by Klaviyo profile count); Shopify app plans from $199 a month [2] third-party, November 4, 2026
Configured quote based on total Klaviyo profiles, including suppressed and unsubscribed [3], November 4, 2026
WhoLayer
| Plan | Monthly | Credits | Overage |
|---|---|---|---|
| Free | Free | 100 | None |
| Starter | $49 | 1,000 | $0.060 a credit |
| Growth | $199 | 5,000 | $0.050 a credit |
| Scale | $799 | 20,000 | $0.045 a credit |
Example: identifying 1,000 US people a month uses 1,000 credits. The cheapest fit is Starter at $49 a month. Repeat visits by the same person in a month are free, and company-level ID doesn't use credits.
It depends on what you need and how much. Customers.ai's entry price is: Website pricing not public (priced by Klaviyo profile count); Shopify app plans from $199 a month (as of November 4, 2026). WhoLayer: Free plan with 100 credits a month; paid plans from $49 a month. Use the WhoLayer cost calculator to price your own volume.
No. Person-level identification is US-only. Outside the US, WhoLayer identifies the company, and only after the visitor's consent is recorded.
Customers.ai: None mentioned on its developer page. WhoLayer: Yes: a data MCP server with 13 tools, plus a public docs MCP server with 5.
When you need meta Conversions API with persistent click IDs, or an AI agent that suggests Klaviyo segments to suppress and re-engage.
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.
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