Compare · B2B website visitor ID
Vector in one line: Contact-level B2B advertising and signals platform for marketing teams with sizable ad budgets. 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 Vector if you need contact-level ad audiences on LinkedIn, Google, Meta, Reddit, TikTok, and X.
Checked November 4, 2026. Every Vector figure links to its source.
Company news
Raised a $10M Series A led by SignalFire with HubSpot Ventures (May 13, 2026). [4] third-party, November 4, 2026
| Vector | WhoLayer | |
|---|---|---|
| Positioning | Contact-level B2B advertising and signals platform for marketing teams with sizable ad budgets. [1], November 4, 2026 | Website visitor identification, ecommerce shopper ID, and contact data for teams and AI agents. |
| Person-level visitor ID | Yes, contact-level; strongest in the US [2] third-party, November 4, 2026 | Yes, US traffic only (1 credit per person, charged once a month); company-level worldwide (free) |
| Ecommerce | No ecommerce product found in our research | 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 | Webhooks and Zapier; no public REST API found [2] third-party, November 4, 2026 | Yes: REST API with an OpenAPI 3.1 spec |
| MCP server | Yes: read-only, in alpha, enabled through their customer success team [3], November 4, 2026 | Yes: a data MCP server with 13 tools, plus a public docs MCP server with 5 |
| Pricing model | One annual contract sized by monthly visitors or ad spend, whichever is higher [1], 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 | $36,000 a year (Growth, the only published price) [1], 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.
Company identification is free and unlimited on every plan. Person-level ID is US-only and charged once per person per month; repeat visits are free.
Send identified visitors to Slack, signed webhooks, or a daily or weekly email digest. From the Starter plan, filter by title, company size, and the pages they viewed, and sync contacts one way to HubSpot.
A data MCP server with 13 tools and a REST API with an OpenAPI spec. Per-key daily caps, a 250-credit default ceiling per call, read-only keys, and idempotent retries keep an agent's spending predictable.
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.
Vector's published entry price, next to WhoLayer's plans.
Vector
$36,000 a year (Growth, the only published price) [1], November 4, 2026
One annual contract sized by monthly visitors or ad spend, whichever is higher [1], 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. Vector's entry price is: $36,000 a year (Growth, the only published price) (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.
Vector: Yes: read-only, in alpha, enabled through their customer success team. WhoLayer: Yes: a data MCP server with 13 tools, plus a public docs MCP server with 5.
When you need contact-level ad audiences on LinkedIn, Google, Meta, Reddit, TikTok, and X, or linkedIn bid agents that re-bid on a schedule.
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.