
$99/mo 14 day free trial API
Why it comes up: Person-level visitor ID from $99/mo with a 14-day trial.
Stands out: Credits cover visitor ID, Contact Database unlocks, and B2B phones on every plan, with HubSpot and Salesforce included.
Watch out: Unused credits never roll over. Visitor phones cost 5 credits when found. SSO and whitelabel are Enterprise-only.
Best for
- B2B teams identifying anonymous site visitors
- Sales orgs pushing IDs into HubSpot or Salesforce
- Agencies managing several client workspaces
Read the Bullseye write-up · Untitled AI vs Bullseye

$79/mo Free tier Free trial
Why it comes up: LinkedIn-oriented US visitor identification for B2B sales.
Stands out: US person-level visitor ID with a forever-free company-level rung, with HubSpot, Salesforce, Slack, Clay, and Zapier named.
Watch out: Person-level starts at Starter $79. Pro is $149 and Pro+ $199. This is US-centric; do not expect EU personal identification.
Best for
- US inbound teams who want to know which person is on the site
- HubSpot or Salesforce shops
- Clay and Instantly users turning visits into outbound
Read the RB2B write-up · Untitled AI vs RB2B
Why it comes up: European company-level website visitor identification.
Stands out: Identifies companies on your site and routes them into HubSpot or Dynamics, with a 14-day trial.
Watch out: Prices are in euros. Volume bands rise with how many companies you identify each month.
Best for
- EU B2B sites that want to know which companies visit
- HubSpot shops that will start on a 14-day trial
- Teams that can live on Starter at €69
Read the Leadinfo write-up · Untitled AI vs Leadinfo

Sales-quoted Free tier MCP API
Why it comes up: Enterprise intent and account identification for ABM teams.
Stands out: Predictive account scores plus a Sales Copilot that recommends actions, summarizes accounts and drafts messages.
Watch out: No public price. Emails, phones and exports need separate data credits, and predictive AI is a separate package.
Best for
- Enterprise sales teams prioritizing accounts with predictive scores
- GTM orgs that want intent, technographics and visitor ID together
- RevOps connecting 6sense to CRM and sales engagement tools
Read the 6sense write-up · Untitled AI vs 6sense