Paid advertising and word-of-mouth marketing both fill event seats, but they do different jobs and cost very different amounts per result. This article compares them on the measure event organizers care about most: what it costs to turn a stranger into a registrant.
Using 2026 benchmarks for Google and LinkedIn ads, Snöball’s own peer-to-peer data and recent client results, we found that paid ads buy reach and leads, while peer recommendations deliver registrants who arrive already vouched for by someone they trust.
The most effective event marketing plans in 2026 use paid media to start the conversation and their own community to carry it. This post was first published in 2023 and has been fully updated with 2025 and 2026 data.
How we compared them
Advertising data has no single source of truth. Costs vary by platform, audience, industry, region and season, so we used published averages and treat them as reference points rather than predictions for any one event.
For Google, we used the 2026 search advertising benchmarks from WordStream and LocaliQ. For LinkedIn, we used a range of published 2026 estimates. For word-of-mouth, we used Snöball’s 2026 Peer-to-Peer Event Marketing Benchmark Report and client case studies, which are first-party data from campaigns run on our platform.
One distinction shapes everything that follows. Ad platforms report cost per lead, where a lead is usually a form fill or a call. A lead is not a registrant, and peer-driven results are reported as completed sign-ups.
Both sides of the comparison exclude agency fees, campaign management time, creative production and software costs.
What paid acquisition costs in 2026
Google Ads
Google search ads remain a dependable way to reach people already looking for an event like yours. You set a budget, target by keyword, location and audience, and pay when someone clicks.
WordStream and LocaliQ’s 2026 benchmarks, based on more than 13,000 search campaigns run between April 2025 and March 2026, put the average cost per lead at $66.69. The average conversion rate was 8.18% and the average cost per click was $5.42 (WordStream).
There was good news in that data for advertisers: it was the first year in five that average cost per lead fell. Even so, the math adds up at event scale. At the 2026 average, 300 leads would cost about $20,000, before a single one of them has registered.
LinkedIn Ads
LinkedIn is where many B2B event marketers concentrate their budgets, because it allows targeting by job title, industry, seniority and company. That precision comes at a premium.
LinkedIn does not publish its own cost benchmarks, and third-party estimates vary widely. Published 2026 estimates from agencies and ad-tech firms generally place B2B cost per lead between about $68 and $200, depending on industry and targeting (Ryze, Benly).
Using that range, 300 LinkedIn leads would cost between about $20,400 and $60,000. Again, those are leads, not registrations.
What peer-driven acquisition delivers
Word-of-mouth marketing for events gives the people already connected to your event, such as registrants, speakers, exhibitors and sponsors, a simple way to invite their own networks. Each invitation carries a personal endorsement that an ad cannot buy.
Snöball’s 2026 Peer-to-Peer Event Marketing Benchmark Report found that peer-driven social shares convert to registrations at 31.9% on average, with top-performing events above 50%. Peer referrals accounted for 6.9% of total attendees on average, and more than 13% at top performers.
Those referrals also travel through channels ads cannot reach. In the same report, dark social channels such as WhatsApp, SMS, Slack and Teams made up 32.6% of the total. Read more on how dark social drives event registrations.
What it looks like in practice
Unlike a lead, each result below is a completed registration or a measured return.
| Event | Organizer | Result |
|---|---|---|
| DTECH 2026 | Clarion Events | 1,956 registrations added and $365K in visitor revenue |
| MODEX 2026 | MHI | 1,955 registered referrals at a 28.37% click-to-sign-up rate |
| G2E 2025 | RX Global | 1,228 additional registrations at a 51.5% share-to-conversion rate |
| HumanX 2025 | HumanX | 5,057 AI industry professionals mobilized, with a 196X return on investment |
Samantha Nagel, Portfolio Marketing Director at RX Global, summed up the G2E experience:
“We’ve seen a large ROI just from peer-to-peer marketing on G2E this year. And it’s not just the tech, it’s the team. Our dedicated customer success rep helps us manage campaigns, tweak them when needed, and keep everything on track. It’s been an incredibly smooth and rewarding partnership.”
Peer campaigns are not free, so compare them on the same basis as ads. Our ROI calculator estimates the return for your own event, and Snöbank is designed to help a peer campaign pay for itself.
Why trust shifted further toward peers in 2026
The case for word-of-mouth is not only about cost. In 2026, the audiences event marketers want to reach are trusting institutions less and the people around them more.
The 2026 Edelman Trust Barometer, a survey of nearly 34,000 people across 28 countries, found that trust in national government leaders and major news organizations fell, while trust in coworkers, neighbors, family and friends rose. Edelman describes it as a shift from “we” to “me.”
Advertising is changing too. AI has made ads faster and cheaper to produce, and audiences have noticed. In a May 2026 Bentley University-Gallup survey of 3,270 U.S. adults, 79% said they had seen ads in the past 30 days that looked AI-made.
Research from The Harris Poll, the 4As and Infillion found that 73% of consumers would be less likely to trust an ad they suspected was made with AI. These are consumer studies, not surveys of event attendees, but they describe the feeds your prospects scroll every day.
How people discover options is shifting as well. G2’s 2026 Buyer Behavior Report found that 82% of B2B software buyers had sourced recommendations from an AI chatbot in the past two years, yet review sites edged past chatbots as the top influence on shortlists.
The pattern is familiar to event marketers. People may find options through search and AI, but they decide with input from people they trust. We explore this further in Peer Intelligence: The Missing Layer in Event Marketing Strategy.
Where paid ads still earn their place
Paid advertising still does specific jobs well, and some of them word-of-mouth cannot do alone.
- Reaching new audiences. Peer sharing travels through existing networks. When you launch an event, enter a new region or target a group your community does not yet include, paid media reaches people no current attendee knows.
- Capturing active demand. Search ads meet people at the moment they are looking for an event in your category.
- Building early momentum. Every peer campaign needs a first wave of registrants. Paid media can help create that starting group, who then invite others.
- Retargeting. Visitors who reached your registration page without signing up can be reached again.
The useful question is which job each channel does best.
Running both together
The strongest results come when paid and peer channels feed each other.
- Turn every paid registrant into a promoter. Show each new registrant a personalized invitation to share the moment they sign up, so a visitor you paid for can bring in others at no extra media cost. See 67 ways to personalize your referral campaigns.
- Activate speakers, exhibitors and sponsors early. Their networks are often larger and better targeted than any audience you could buy. Our Speaker Advocacy Guide covers how.
- Track each channel separately. Unique referral links and promo codes let you compare cost per registrant across paid and peer channels. Read what your event’s promo codes can tell you about attribution.
- Send referral traffic to pages built to convert. The Event Landing Page Playbook covers the essentials.
- Plan for the final weeks. Peer sharing can help close the late-registration gap. See how to reduce late registrations at your event.
Attribution is what makes the comparison fair. Morgan Pettrone, Director of Marketing Communications at MHI, described the MODEX 2026 campaign this way:
“What stood out was how little lift it took on our end. Snöball integrated with our registration platform, ran the booster emails and referral contest over a six-month campaign, and gave us a dashboard showing exactly where shares and sign-ups were coming from. Our registrants did the promoting, and we could see the impact in real time.”
The bottom line
Paid advertising buys attention and leads. Word-of-mouth delivers registrants who arrive with a recommendation from someone they know. In 2026, that difference carries more weight than it used to.
The next few years are likely to sharpen that difference. As AI makes ads cheaper to produce, feeds will probably fill with more of them, and a message from a familiar name may stand out all the more. Event teams, many of them small and stretched, are likely to keep looking for channels that grow without a matching rise in spend.
Measurement will decide how far that shift goes. For years, word-of-mouth was treated as goodwill: valued, but rarely counted. Now that a referral can be traced from a single share to a completed registration, it can sit on the same spreadsheet as paid media and be judged by the same standard.
None of this retires the ad budget. The more likely future is a division of labor, with paid media finding new audiences and the community already in the room bringing in the next one.
