The Total Addressable Market Calculator by Hunter calculates the TAM for businesses using real company data from a database of over 100 million companies. It allows users to apply filters to segment companies by criteria such as industry, size, and location, providing an accurate market size based on actual data rather than estimates or reports.

Key features include access to Hunter's B2B database, which is continuously updated from public sources like company websites and LinkedIn to ensure data accuracy. Users can filter companies to match their ideal customer profile and see the TAM calculation in real-time. The tool is integrated with Hunter's email verifier for validating email addresses and supports cold email sequences for targeted outreach, along with workflow automation through CRM integrations, Zapier, and APIs.

The TAM is calculated by identifying the number of companies that meet the user's specified criteria from the database and multiplying that count by the user's Average Contract Value (ACV) to estimate the total revenue opportunity. This method relies on real data rather than projections, offering a grounded approach to market sizing.

Benefits include saving time in market research, improving sales planning accuracy, and enabling immediate prospecting actions. It is useful for validating business ideas, planning marketing campaigns, and optimizing lead generation efforts by providing actionable insights from real company data.

The target audience includes sales professionals, marketers, and businesses engaged in B2B sales, with over 6 million professionals trusting Hunter's tools. Integrations with CRMs, Zapier, and APIs allow for seamless workflow incorporation, making it suitable for teams looking to enhance their prospecting and market analysis capabilities.