What Is an Expression of Interest Form in Marketing?

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An Expression of Interest (EOI) form lets users show interest before launch. Click to learn how this tool builds qualified early leads for your campaign.

An Expression of Interest (EOI) form is used in marketing to collect signals from users who want to know more about a future product, service, or event. It is commonly used during pre-launch periods to validate interest and build a priority list.

Unlike a standard signup form, an EOI form is framed around exclusivity and anticipation — often paired with limited availability or beta access incentives.

You can use Gleam’s Capture App to launch an EOI popup on your site and begin collecting real-time leads while your offer is still under wraps.