--- title: "WhoLayer vs Opensend (2026): pricing, features, and where each is stronger" description: "A sourced, dated comparison of WhoLayer and Opensend: person-level ID, ecommerce, API, MCP, and pricing, plus where Opensend is the better pick." url: https://wholayer.com/compare/opensend --- Compare · Ecommerce shopper identification # WhoLayer vs Opensend Opensend in one line: Ecommerce identity: new-visitor identification, cross-device re-recognition, and event signals. 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 Opensend if you need cross-device re-recognition (Reconnect) so existing flows fire more often. Checked November 4, 2026. Every Opensend figure links to its source. Acquired Opensend acquired Fueled, a first-party event pipeline, in March 2026. [\[4\], November 4, 2026](https://wholayer.com/compare/opensend#source-4) ## Side by side WhoLayer compared with Opensend |   | Opensend | WhoLayer | | --- | --- | --- | | Positioning | Ecommerce identity: new-visitor identification, cross-device re-recognition, and event signals. [\[1\], November 4, 2026](https://wholayer.com/compare/opensend#source-1) | Website visitor identification, ecommerce shopper ID, and contact data for teams and AI agents. | | Person-level visitor ID | Yes, US only [\[2\], November 4, 2026](https://wholayer.com/compare/opensend#source-2) | Yes, US traffic only (1 credit per person, charged once a month); company-level worldwide (free) | | Ecommerce | Yes: Shopify, Klaviyo, Omnisend, Magento, Iterable, Braze, Attentive, and ad platforms [\[3\], November 4, 2026](https://wholayer.com/compare/opensend#source-3) | Yes: Shopper ID sends identified US shoppers to Klaviyo, Customer.io, Mailchimp, Omnisend, Iterable, Braze, ActiveCampaign, or Brevo, with Returning Shopper events for existing Attentive and Postscript subscribers (2 credits per new shopper, 1 credit for shoppers already on your list where the platform can be checked), Growth plan and up | | API | No public API found in our research | Yes: REST API with an OpenAPI 3.1 spec | | MCP server | None found in our research | Yes: a data MCP server with 13 tools, plus a public docs MCP server with 5 | | Pricing model | Tiers by traffic band; identities can be capped and unused credit rolls over [\[1\], November 4, 2026](https://wholayer.com/compare/opensend#source-1) | 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 | $400 a month billed annually ($500 monthly) for 2,000+ identities (Tier 1) [\[1\], November 4, 2026](https://wholayer.com/compare/opensend#source-1) | 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](https://wholayer.com/pricing) and the [MCP docs](https://wholayer.com/docs/mcp). ## Where Opensend is stronger An honest list. If one of these is what you need, it may be the better pick. - Cross-device re-recognition (Reconnect) so existing flows fire more often - Many ecommerce integrations beyond Klaviyo - Rollover credits with a hard identity cap - A first-party event pipeline (Fueled) ## Where WhoLayer is different ### Shopper ID for Klaviyo and other email platforms Each identified US shopper arrives in Klaviyo, Customer.io, Mailchimp, Omnisend, Iterable, Braze, ActiveCampaign, or Brevo as a contact 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 on platforms that report them. ### One wallet, published per-result prices 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. ### Opt-outs honored everywhere 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, spend caps Monthly plans stop at the end of the billing period, and you can set a hard monthly spend cap so overage never surprises you. ### WhoLayer isn't the right fit if - Your store's email platform isn't one we support yet (Klaviyo, Customer.io, Mailchimp, Omnisend, Iterable, Braze, ActiveCampaign, or Brevo). Others need a signed webhook and your own integration, and some guarantees, like the holdout report, depend on what your platform's API allows. - You need person-level identification of visitors outside the US. WhoLayer identifies people for US traffic only; elsewhere it's company-level, after consent. - You want a full ABM advertising suite, an on-site AI chat agent, or a built-in sequencer and dialer. WhoLayer identifies and enriches; it doesn't run ads, chat, or send email for you. ## Pricing Opensend's published entry price, next to WhoLayer's plans. Opensend $400 a month billed annually ($500 monthly) for 2,000+ identities (Tier 1) [\[1\], November 4, 2026](https://wholayer.com/compare/opensend#source-1) Tiers by traffic band; identities can be capped and unused credit rolls over [\[1\], November 4, 2026](https://wholayer.com/compare/opensend#source-1) WhoLayer WhoLayer plans | 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. [Price your own volume](https://wholayer.com/calculator) ## Questions ### Is WhoLayer cheaper than Opensend? It depends on what you need and how much. Opensend's entry price is: $400 a month billed annually ($500 monthly) for 2,000+ identities (Tier 1) (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. ### Does WhoLayer identify people outside the US? No. Person-level identification is US-only. Outside the US, WhoLayer identifies the company, and only after the visitor's consent is recorded. ### Do Opensend and WhoLayer have MCP servers? Opensend: None found in our research. WhoLayer: Yes: a data MCP server with 13 tools, plus a public docs MCP server with 5. ### When is Opensend the better choice? When you need cross-device re-recognition (Reconnect) so existing flows fire more often, or many ecommerce integrations beyond Klaviyo. ## Sources - \[1\] [Opensend pricing](https://www.opensend.com/pricing) (vendor's own page, checked November 4, 2026) - \[2\] [Opensend FAQ](https://www.opensend.com/faq) (vendor's own page, checked November 4, 2026) - \[3\] [Opensend for DTC](https://www.opensend.com/dtc) (vendor's own page, checked November 4, 2026) - \[4\] [Opensend: Fueled](https://www.opensend.com/fueled) (vendor's own page, checked November 4, 2026) 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](https://wholayer.com/contact?topic=sales) and we'll fix it. [Opensend alternatives](https://wholayer.com/alternatives/opensend) · [All comparisons](https://wholayer.com/compare) Ready when you are ## See who's on your site this week Install one tag. Your first 100 identified people are free, no card needed. [Start free](https://wholayer.com/signup) [Talk to sales](https://wholayer.com/contact?topic=sales)