Your Webinar, Fully Attended: Why Pharma Brands Choose IMI to Reach HCPs

A registration is not an attendance. The industry average for webinar attendance sits at just 46% of registrants, meaning more than half the audience a campaign works so hard to sign up never actually shows up. That gap between sign-up and attendance is where most campaign effort quietly disappears, and it is decided in the days between registration and the event, not on the day itself.

This is the part of the funnel that gets the least attention. Marketing teams pour resource into driving registrations, then treat the webinar as effectively "sold" the moment someone clicks register. But attention is scarce, inboxes are crowded, and a clinician who signed up three weeks ago with good intentions can easily lose track of the date, the value, or the reason they said yes in the first place. Turning a registration into an attendance is the harder job, and it starts long before the event goes live.

There's a second, quieter problem sitting underneath this: audience match. A cardiology webinar sent to a general list will underperform, not because the emails failed, but because the match was wrong at the outset. No cadence, no subject line, and no reminder sequence can compensate for the wrong clinicians receiving the invitation. Specialty-segmented, double opt-in data sets the ceiling for everything the rest of the campaign can achieve. Get the audience right first, and the cadence does the rest.

Email remains the number one promotional tool for pharmaceutical webinars precisely because it's the channel best equipped to solve both problems: reaching the right specialists, and staying in front of them consistently enough that the event doesn't get lost in the gap between sign-up and attendance.

The results this produces for clients aren't one-off. On one campaign, IMI emails delivered 62% of all webinar registrations across the client's combined channel mix. On another, IMI emails generated 124 registrations, a quarter of all sign-ups from every channel used, and ranked as the highest-converting email source overall:

"IMI continues to deliver strong, dependable results for us. On our latest webinar campaign, IMI emails generated 124 registrations, contributing 25% of total sign-ups and ranking as the highest-performing email channel for conversions. Just as importantly, the entire IMI team are a pleasure to work with: responsive, proactive, and always focused on delivering the best outcome."IMI client, 2026

Why it worked

None of this comes from a single well-timed email. It comes from a five-step cadence that carries the audience from first sight of the event through to the post-event replay:

Where the schedule allows, extra reminders lift attendance further still: a nudge on the morning of the webinar, or one as it goes live, catches registrants who meant to attend but lost track of the date.

Subject lines carry their own weight in this. Each one is built against a 4U test: Urgent (a sense of scarcity, such as limited places), Useful (something of value in return for the open), Unique (standing out from other invitations in the inbox), and Ultra-specific (telling the reader exactly what the session covers), kept under 50 characters so it reads in a single glance and isn't truncated by common email clients or flagged by spam filters.

And every invitation is built to answer five questions without the reader having to hunt for anything: what the webinar is, when it's happening, who is presenting, why it's worth attending, and how to register, with calls to action placed in the header, body, and footer.

For the full approach, including packages and reporting, download the IMI Webinar and Event Marketing playbook (PDF).

Attendance isn't won on the day of the webinar. It's won in the weeks before it, one well-timed, well-targeted email at a time, and it's the part of the funnel where IMI consistently outperforms.