Use Cases & Campaigns
Can I send postcards to companies attending an upcoming trade show?
Yes, if you can identify the companies. Exhibitor lists are usually published on the event website, and sponsor and speaker lists often are too. Full attendee lists are rarely shared, so most teams build a list of likely attendees from those public sources and their own target accounts, then mail personalized postcards before the show.
Practical guide · Published October 21, 2026 · Written by Chinedu Okafor
The Yotru answer
Start with what's public, then add the target accounts you already know are active in that industry and region. Yotru can find the decision-makers and mailing addresses for those companies, and you review and approve the list before you pay. From there, each company gets a postcard personalized to it and to the event.
How clients ask it
- Can I get the attendee list for a trade show?
- How do I reach companies going to a conference?
- Can I mail exhibitors before the event?
Where the list comes from
| Source | Usually available? | Notes |
|---|---|---|
| Exhibitor list | Usually public | Posted on the event site. Good for partner, supplier or peer outreach. |
| Sponsors and speakers | Usually public | Senior people, often worth a more personal note |
| Attendee list | Rarely shared | Some organizers offer opt-in lists or mail for you. Check the terms. |
| Last year's exhibitors and speakers | Often findable | Shows who tends to come back |
| Your own target accounts | Yes | Filter by the industry and region the show serves |
What to send
Make the card about meeting at the event: an invitation to book a demo at your booth, an offer to meet on site, or a simple note that your team will be there. Personalize it with the company name and one line on why you'd like to meet them specifically. Mail three to four weeks ahead, since delivery usually takes about a week and can take 2 to 3 weeks.
How we look at it at Yotru
A trade show gives you a natural reason to reach out, even to companies that don't end up attending. We'd build the list from public event sources plus your best-fit accounts, keep it to the companies you'd genuinely want to meet, and use the QR scans to decide who your team calls first.
Frequently asked questions
Sometimes, from the organizer, but usually with conditions on how it can be used. Many organizers don't share attendee details at all.
Yes. Exhibitor lists are published so companies can find each other. Keep the message relevant and follow the event's rules for any list they provide.
Three to four weeks before the event. Production takes about 2 to 3 days, and delivery usually takes about a week but can take 2 to 3 weeks.
Yes. Yotru can source business contacts and mailing addresses for the companies on your list.
Only as many as your team could realistically meet. For most teams that's somewhere between 50 and a few hundred.
The postcard still introduces you. Give them a way to book a call instead, so the card is useful either way.
Related topics
Work with Yotru
Reach the right companies before the show
Build a list from exhibitors, sponsors and your own target accounts, approve it before you pay, and let Yotru handle addresses, printing and mailing.