Lead411 vs Seamless.AI

Lead411 is a B2B contact data and prospecting service with direct-dial data, buyer intent data, technographic filters, and API access. Its Chrome Extension is for browsing LinkedIn and other company websites, and the service integrates with Salesforce, HubSpot, Pipedrive, Outreach.io, and other platforms. Lead411 says its contact data process combines machine learning, human verification, and real-time email validation; it claims 96%+ email deliverability accuracy and a 97% average for optimized verified emails. Direct dials receive human verification and location matching. Most plans offer unlimited lead searches and exports, though some have monthly or yearly limits; unused exports roll over to the next billing cycle. The Pilot plan provides 50 free exports during a 7-day trial. Paid plans start at 49 USD per month. Monthly plans can be canceled at any time; annual-plan options require contacting support. Lead411 says it was founded in 2001 and is headquartered in Boulder, Colorado. It also states that it is a registered data broker under applicable state laws, including Texas law.

Seamless.AI is a real-time search engine for B2B lead and contact prospecting, available on web, through an extension, and by API. It searches the public web to find and validate contact information; the listed contact database size is 1,300,000,000. Prospector uses dynamic filters to find verified emails and mobile phones for B2B buyers. Buyer Intent highlights prospects actively buying a product, while Job Changes tracks decision-makers changing jobs. CRM Enrich adds information to CRM records, and outreach features cover email, calls, and social channels, including email sending and an AI-powered phone dialer. The integrations page names Salesforce, HubSpot, Microsoft Dynamics, Outreach, Salesloft, Zoho CRM, and Pipedrive, with availability and capabilities varying by integration and plan. The free plan costs nothing for one user and 50 credits. Pro lists unlimited exports, while Enterprise lists unlimited users and exports; neither plan has a listed price. API key access is available on business plans, with eligibility and pricing details available from sales. The company says it refunds a credit automatically for an invalid email.