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If you relied on Clearbit's free visitor tools or want IP-to-company visitor ID without moving to a HubSpot hub plan, WhoLayer's company-level visitor ID is free and unlimited on every plan, and it works with or without HubSpot.
Checked November 4, 2026.
Acquired
Clearbit joined HubSpot. HubSpot ended Clearbit's free tools, including the Weekly Visitor Report, on April 30, 2025, and the Logo API on December 1, 2025, pointing visitor-intent users to Buyer Intent. [4], November 4, 2026
Every WhoLayer endpoint and MCP tool below exists today. Where there's no equivalent, we say so.
| What you used Clearbit Reveal for | WhoLayer | REST endpoint | MCP tool | Status |
|---|---|---|---|---|
| Reveal which companies visit your site | Company-level visitor ID through the tag, free and unlimited | GET /v1/visitors?level=company | list_visitorsFree. | Available |
| Weekly visitor report email | Email digest destination, daily or weekly | — | — | Available |
| Company enrichment by domain | Company profile: size, revenue range, industry, HQ | GET /v1/companies/{domain} | get_company1 credit when a profile is returned; nothing if not found. | Partial |
| Person enrichment by email | Enrich a person by email | POST /v1/people/enrich | enrich_person1 credit per work email, 2 per personal email, and 5 per mobile returned, plus 10 for a reverse lookup when you send only an email and we find the person. Nothing if no match. | Available (US only) |
| Who the person was (not just the company) | Person-level visitor ID | GET /v1/visitors?level=person | — | Available (US only) |
| HubSpot integration | One-way HubSpot sync: contacts, their company, and a visit note | — | — | Partial |
| Reveal API (IP address in, company out) | No equivalent | — | — | Not offered |
| Logo API | No equivalent | — | — | Not offered |
REST base URL: https://api.wholayer.com/v1. MCP server: https://mcp.wholayer.com/mcp. Full reference in the API docs and OpenAPI spec.
WhoLayer isn't a complete replacement. Plainly:
Step 1
Sign up with your work email. The Free plan needs no card.
Step 2
Under Settings, API keys. Use a wl_test_... key first: every endpoint and MCP tool returns sandbox data and never spends credits.
Step 3
Paste one async script in your site header or install through Google Tag Manager. Company-level ID starts right away.
Step 4
Send them to Slack, a signed webhook, an email digest, or HubSpot as contacts.
Yes. Company identification doesn't use credits on any plan, including Free.
No. WhoLayer works on its own, and HubSpot is one optional destination.
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
The Free plan includes 100 credits a month for visitor ID, the Data API, and the MCP server. No card needed.