WhoGoes vs ZoomInfo for Events: Attendee Lists vs Contact Database

Quick answer: ZoomInfo is a general B2B contact database (100M+ contacts, ~$15K/yr) with no event attendance data. WhoGoes provides verified attendee lists for 1,200+ trade shows with LinkedIn proof and emails, starting at $29. For event-based prospecting, WhoGoes fills the one gap ZoomInfo can't: who actually attended.

ZoomInfo is the largest B2B contact database in the world. WhoGoes is a focused event attendee data platform. Sales teams planning trade show outreach often compare the two, which is a bit like comparing a Swiss army knife to a lockpick. They're both useful. They're not the same tool.

ZoomInfo gives you access to 100M+ business contacts with company data, org charts, technographics, and buying intent signals. It's a general-purpose sales intelligence platform.

WhoGoes provides verified attendee lists for 1,200+ trade shows and conferences, sourced from public LinkedIn posts. Every contact has proof of event attendance.

Key Takeaways

• ZoomInfo is a general contact database with no event-specific signal; WhoGoes is built entirely around event attendance
• ZoomInfo can tell you who works at a company; WhoGoes can tell you who attended a specific trade show
• WhoGoes starts at $29 vs ZoomInfo's ~$15K/yr, but they serve different primary use cases
• The smartest approach for event outreach: use both together (WhoGoes for event signal, ZoomInfo for enrichment)

The Event Data Gap in ZoomInfo

ZoomInfo is excellent at answering "Who works at this company?" It can't answer "Who attended HIMSS 2026?" There's no event attendance signal in ZoomInfo's data model. It wasn't built for that. Fundamental gap. Not fixable. No matter how many data enrichment features ZoomInfo adds to its platform, the absence of event attendance tracking means any trade show outreach you run from it is based on a guess about who showed up rather than verified proof that a specific person was actually in the room.

So if you're planning pre-event outreach or post-event follow-up, ZoomInfo can help you find contacts at target companies, but you're guessing about who will actually be at the event. Maybe the VP of IT at Acme Corp is going to Knowledge 26. Maybe not. ZoomInfo has no idea.

WhoGoes fills this exact gap. It monitors public LinkedIn posts about trade shows and builds verified attendee lists. Every contact has a linked source post proving they attended or plan to attend.

What ZoomInfo Does Better

ZoomInfo is a far broader platform. For general sales prospecting (outside of events), it offers things WhoGoes doesn't. Bigger database. More features. With 100 million-plus contacts, org charts, technographics, direct dials, and buyer intent signals, ZoomInfo covers substantially more prospecting use cases than WhoGoes, which is why it costs $15,000 per year and why teams that need general-purpose sales intelligence use it as their primary data platform rather than an event-specific supplement.

• Massive database: 100M+ contacts across every industry
• Org charts: See reporting structures and identify the right decision-maker
• Technographics: Know which technologies companies use (useful for displacement selling)
• Buyer intent: Topic-level intent signals from web activity
• Direct dials: Phone numbers for direct outreach
• CRM integration: Syncs directly with Salesforce, HubSpot, and others

If you need a general-purpose contact database for all your prospecting (not just events), ZoomInfo is the industry standard. I'm not going to pretend otherwise.

What WhoGoes Does Better

For event-specific use cases, WhoGoes wins on four things. Each one matters. For teams doing trade show outreach as a core prospecting motion, the combination of verified attendance data, real-time list building, event-specific context, and accessible pricing adds up to a workflow advantage that no general-purpose contact database can replicate on its own.

1. Verified event attendance

WhoGoes doesn't guess who attended. It shows you, with LinkedIn proof. Every contact is linked to a public post about the event. That's a different kind of confidence when you reference the event in your outreach.

2. Pre-event timing

WhoGoes lists build in real-time as people post about upcoming events. You can start pre-event outreach weeks before the show, while ZoomInfo has no awareness of who's attending what.

3. Contextual outreach

"I saw you're heading to CES. Want to meet at booth 4521?" is a much more effective cold email than a generic outreach. WhoGoes gives you that context. ZoomInfo doesn't.

4. Accessible pricing

At $29 for 200 contacts vs $15K+/yr for ZoomInfo, WhoGoes makes event-based prospecting accessible to startups, freelancers, and small teams that can't justify an enterprise contract.

Using WhoGoes + ZoomInfo Together

The smartest approach, honestly, is using both. Best stack. Proven combo. When you combine WhoGoes' verified event attendance data with ZoomInfo's org charts, technographics, and direct dials, you get a complete picture of each contact: you know they attended the event (WhoGoes), you know their reporting structure and technology stack (ZoomInfo), and you can reach them by email and phone with a context-specific opener that references something they publicly stated.

1. WhoGoes identifies who attended the event: trade show attendee lists with LinkedIn proof (the "who" and "proof")
2. ZoomInfo enriches those contacts with org charts, technographics, and direct dials (the "context")

This combo gives you everything: event attendance proof for relevant outreach, plus deep company intelligence for personalization. I've seen teams run this playbook and it works well, especially for high-ACV deals where the extra research pays off.

Who Should Use ZoomInfo Alone?

Works well here. Good fit. ZoomInfo is sufficient if:

• You don't do event-based prospecting and need a general contact database
• Your outreach isn't event-specific: you're targeting by company, role, or technology
• You need direct dials and org charts as your primary data points

Valid use case. Right tool. For teams whose prospecting motion is built around company-level targeting, job function filtering, or technology displacement rather than event attendance, ZoomInfo's comprehensive contact database with direct dials and org chart data covers the workflow completely without needing any event-specific supplement.

Who Should Use WhoGoes?

Event-first always. Clear match. WhoGoes is the right tool if:

• You need to know who attended specific trade shows
• You want LinkedIn proof to reference in outreach
• You're doing pre-event or post-event outreach and timing matters
• You need affordable access without a $15K+ annual commitment

Event-focused teams. Clear fit. WhoGoes is built for the specific workflow of event-based outreach: finding who attended, verifying it, and reaching out with a credible, personalized opener — all at a price that lets individual SDRs expense it without a procurement process or annual commitment.

Bottom Line

ZoomInfo is a general contact database with no event awareness. WhoGoes is an event attendee data platform with LinkedIn proof. For trade show outreach, WhoGoes provides the one thing ZoomInfo can't: verified event attendance data, starting at $29. For general prospecting across all channels, ZoomInfo is the bigger platform. Use both for the most powerful event outreach workflow. Different tools. Better together. If your team attends trade shows and you're already paying for ZoomInfo, adding WhoGoes at $29 per event gives you the one data point ZoomInfo cannot provide — proof that a specific person attended a specific event — and turns your ZoomInfo enrichment into genuinely personalized outreach rather than another company-filtered cold sequence.

Related: What Is a Trade Show Attendee List?, an overview of attendee lists and why LinkedIn proof matters.