Author: The Prospect Solutions team, B2B telemarketing and lead generation specialists based in Cranleigh, Surrey, with over 15 years’ experience helping technology and professional services companies fill events with the right decision makers.

TL;DR: Event telemarketing is the use of outbound phone calls, backed by targeted data, to invite the right people to a B2B event, remind them so they actually turn up, and follow them up afterwards to turn attendance into pipeline. It matters because the average webinar only converts 35 to 45 percent of registrants into attendees, and email invitations alone rarely move that number. A structured telemarketing campaign, run before, during and after an event, typically lifts attendance, cuts no-shows and gives sales a warm reason to call every delegate afterwards. For UK B2B companies running webinars, conferences or exhibition stands in 2026, event telemarketing is usually the single highest-leverage addition to an events budget.

Most B2B marketers know the feeling. The webinar registration count looks healthy, the exhibition stand is booked, the seminar invitations have gone out, and then the day arrives and half the room, or half the Zoom call, is empty. The problem is rarely the event itself. It is what happens, or does not happen, between registration and the event starting.

What is event telemarketing?

Event telemarketing is the practice of using outbound phone calls to drive attendance and results around a B2B event, whether that is a webinar, an in-person seminar, a conference or an exhibition stand. It sits alongside email and paid promotion as a channel, but it is the only one that involves a real conversation with the prospect before they decide whether to show up.

A typical event telemarketing campaign covers three phases:

Pre-event: building or cleansing a target list, calling to invite the right contacts, and converting interest into a confirmed registration.
Day-of and pre-day reminders: calling confirmed registrants close to the event to reduce no-shows and handle last-minute questions.
Post-event follow-up: calling both attendees and no-shows to qualify interest, book next steps, and capture feedback while the event is still fresh in their mind.

It is different from a general B2B lead generation campaign because every call is anchored to a specific date and a specific reason to talk: your event. That context makes the conversation easier to have and easier for the prospect to say yes to, compared with a cold call with no obvious hook.

Why does event telemarketing matter for B2B companies in 2026?

Because registrations are not the same as attendance, and attendance is not the same as pipeline. Independent webinar research puts the average attendance rate at 35 to 45 percent of registrants, with wide variation by sector, corporate and financial services webinars run at 60 to 65 percent, while education and leisure content can fall as low as 15 to 31 percent (DemandSage, Webinar Statistics, 2026). That means, on an average webinar, more than half the people who registered never turn up, and every one of those no-shows represents marketing spend and sales time that produced nothing.

Timing compounds the problem. The same research found 59 percent of webinar registrations happen less than a week before the event, with 29 percent registering on the day itself. A single automated reminder email sent days in advance is easy to miss in a busy inbox. A phone call the morning of the event is much harder to ignore, and it gives the prospect a chance to reschedule rather than simply not show up, which keeps the lead alive instead of losing it.

The upside is just as clear. When someone does attend a B2B webinar, the same data shows a 73 percent attendee-to-lead conversion rate, a strong return on the effort of getting them there in the first place. Event telemarketing exists to protect that return by making sure more of the right people actually turn up, and that the ones who do not still get a call.

What does an event telemarketing campaign actually involve?

A properly run campaign is closer to a short sales process than a broadcast. In our experience running event marketing campaigns for technology and professional services clients, including securing delegates across virtual and physical events for clients such as Finastra, the work breaks down into five stages.

1. List building and data cleansing

The campaign starts with an accurate, GDPR-compliant list of the right job titles at the right companies, screened against the TPS and Corporate TPS before a single call is made. This is where a B2B data cleansing and verification service pays for itself, because every wasted call is a delegate you did not reach.

2. Invitation calls

Trained callers, not a script-reading call centre, explain why the event is relevant to that specific person and secure a genuine registration, not just a name on a spreadsheet.

3. Confirmation and reminder calls

Registrants are called again closer to the date to confirm they still plan to attend, answer any last questions, and reduce the drop-off that email reminders alone cannot prevent.

4. On-the-day support

For larger conferences and exhibitions, calls continue on the day to chase confirmed attendees who have not yet arrived or logged in.

5. Post-event follow-up

Every attendee and every no-show is called afterwards. Attendees are qualified and moved toward a sales conversation while the event is fresh, often through B2B appointment setting. No-shows are offered a recording, a briefing call, or a rebooking, so the original marketing spend is not wasted.

That last step is the one most companies skip, and it is usually the most valuable. A no-show who registered clearly had an interest. A follow-up call finds out whether that interest is still live.

Event telemarketing vs email and paid promotion

None of these channels work well in isolation for a B2B event. The table below shows where telemarketing adds something the others cannot.

Channel	Best at	Main weakness	Typical use
Email invitations	Reaching large lists cheaply	Low open and click rates, easy to ignore	Initial awareness, save-the-date
Paid social and search ads	Building broad top-of-funnel awareness	Cannot confirm intent or attendance	Filling the top of the registration funnel
Event telemarketing	Converting interest into confirmed, attending, qualified leads	Higher cost per contact than email	Invitation, reminder and post-event follow-up
LinkedIn outreach	Warm, personalised invites to a defined target list	Slower response times, limited daily volume	Senior decision-maker invitations

In practice, the strongest event campaigns use email and paid promotion to build volume, then use telemarketing at the points where a phone conversation changes the outcome: confirming the right person is coming, making sure they still show up, and following up while the event is still relevant. LinkedIn lead generation works well alongside this for senior decision makers who are harder to reach by phone.

How much does event telemarketing cost, and what results can you expect?

Cost depends on list size, how many calls each contact needs, and whether the campaign covers invitation, reminders and follow-up or just one stage. As a general rule, a full pre-to-post-event campaign costs more per contact than a one-off cold calling campaign, because a single delegate may be called two or three times across the lifecycle of one event. Most UK B2B telemarketing providers price event campaigns either per day of calling or per confirmed delegate, and the right model depends on whether the priority is volume of attendees or quality of follow-up conversations.

The return is usually easier to see than the cost. If a webinar converts 73 percent of attendees into a lead, lifting attendance from, say, 35 percent of registrants to 55 percent through reminder calls can nearly double the number of qualified leads the event produces, without spending anything extra on driving registrations in the first place. That is why event telemarketing tends to have one of the strongest returns of any addition to an existing events budget, because it improves the yield of activity you are already paying for.

Frequently asked questions

What is the difference between event telemarketing and cold calling?

Cold calling has no context beyond the prospect’s job title and company. Event telemarketing is anchored to a specific event, date and topic, which gives the caller a clear, relevant reason to talk and makes the prospect far more likely to engage.

Does event telemarketing work for webinars as well as physical events?

Yes. In some ways it matters more for webinars, because the barrier to not showing up is lower for an online event than for one a prospect has travelled to. Reminder calls are one of the most effective ways to protect webinar attendance rates.

How soon before an event should telemarketing start?

For most B2B events, invitation calling should start four to six weeks out, with reminder calls concentrated in the final week and on the day itself, since most registrations and drop-offs happen in that final window.

Can event telemarketing help with exhibition stands, not just webinars?

Yes. Pre-show calls to book meeting slots at your stand, and post-show follow-up with everyone who visited or was scheduled to, are two of the highest-value uses of event telemarketing, since exhibition leads go cold quickly once the event ends.

What happens to the no-shows after the event?

A good post-event process treats no-shows as a separate, valuable segment, not a dead end. A short call offering a recording, a summary, or a rebooking often recovers a meaningful share of the original interest that the registration represented.

Do you need a large database to run an event telemarketing campaign?

No. A smaller, well-targeted and accurately cleansed list of the right decision makers consistently outperforms a large, unverified one, since every call is only as good as the data and targeting behind it.

Get the right people in the room

Registrations do not pay the bills, attendance and follow-up do. If your last webinar, seminar or exhibition stand attracted plenty of sign-ups but not enough of the right people in the room, or the leads went cold before anyone called them back, Prospect Solutions’ event marketing service handles invitation, reminder and post-event follow-up calling for UK B2B companies, so your next event converts registrations into a genuine sales pipeline. Get in touch to talk through your next event.

Event Telemarketing: How B2B Companies Fill Webinars, Conferences and Exhibitions (2026 Guide)