Impossible Data

Maximize ROI from in-person events

Turn conference attendee datainto meetings and pipeline

Company and people lists with attending signals, conference activities, and firmographics, plus the contact fields your team needs for in-person sales, coffee chat, booth strategy, and post-event follow-up.

Built for major US conferences across industries

Sample Export

The rows your GTM team can actually use

Not a sponsor PDF. Not scraped badges. A structured dataset your team can filter, route, enrich, and act on before the conference window closes.

Sample attendee export

Attending signal, category, rationale, conference, identity and contact fields, then firmographics, company, and geography—illustrative rows only.

Attending SignalAttending CategorySignal ReasonConferenceNameTitleEmailPhone NumberSeniorityDepartments# EmployeesIndustryRevenueWebsiteCompany NameCityStateCountry
Very strongSide Event

Publicly hosting a founders dinner during HLTH week and RSVPs reference being on-site in Las Vegas, with multiple co-host confirmations and venue details published in the same thread.

HLTH
Aditi Aggarwal
Founderad***@gtmunbound.com+1 (415) 555-0142FounderC-Suite3Information technology & services$1M – $5Mhttps://gtmunbound.comGTM UnboundSan FranciscoCaliforniaUnited States
StrongAttending

Posted flight confirmation and booth meetings that align with Dreamforce dates in San Francisco, including a calendar screenshot that names Moscone sessions.

Dreamforce
Luiz Cent
SDE 2lu***@youkti.ai+1 (415) 555-0288EntryEngineering & technical7Software$500K – $1Mhttps://youkti.aiYouktiBengaluruKarnatakaIndia
StrongSpeaking

Speaker profile lists an AWS re:Invent session with time and venue details for Las Vegas, plus a rehearsal note that references badge pickup and rehearsal room assignments.

AWS re:Invent
Adithya Challa
Show Hostad***@givedirectly.org+1 (415) 555-0311ManagerMarketing20Nonprofit organization management$50M – $100Mhttps://givedirectly.orgGiveDirectlyLong BeachCaliforniaUnited States
MediumSponsor

Company announced a CES sponsorship package and listed booth hours without a personal attendance confirmation, though the contact reshared the announcement with a booth map image.

CES
Maya Okonkwo
Chief Revenue Officerma***@sprinto.com+1 (415) 555-0444VpSales590Staffing & recruiting$10M – $25Mhttps://sprinto.comSprintoLondonEnglandUnited Kingdom
LowAttending

Mentioned interest in RSA Conference but no travel dates or registration proof surfaced in public updates, aside from a generic comment that they hope to attend if schedules allow.

RSA Conference
Carlos Costa
Software Engineercc***@somniosoftware.com+1 (415) 555-0599EntryEngineering & technical45Software$2M – $10Mhttps://somniosoftware.comSomnio SoftwareMontevideoMontevideo DepartmentUruguay
Very strongAttending

Shared a calendar block titled SaaStr week in the Bay Area with internal AE briefings, plus a public reply confirming badge pickup and a dinner RSVP thread that references Moscone-adjacent venues the same nights as the main agenda.

SaaStr Annual
Elena Park
VP of Salesel***@northbeam.io+1 (415) 555-0612VpSales210Software$25M – $50Mhttps://northbeam.ioNorthbeamAustinTexasUnited States
StrongAttending

Posted an outbound campaign brief that names INBOUND dates in Boston, a hotel confirmation screenshot with check-in overlapping the expo hall build days, and a comment thread tagging field marketing for on-site signage pickup.

INBOUND
Marcus Webb
VP of Marketingma***@lumenarc.com+1 (415) 555-0734VpMarketing480Computer software$50M – $100Mhttps://lumenarc.comLumenarcChicagoIllinoisUnited States
Very strongAttending

Published a short video walk-through of the company booth map for Collision in Toronto, explicitly says she is staffing the stand during exhibitor hours, and replies to a partner thread with her arrival airport and ground transport timing.

Collision
Sofia Reyes
VP of Demand Generationso***@stackpathhq.com+1 (415) 555-0848VpMarketing120Information technology & services$10M – $25Mhttps://stackpathhq.comStackpath HQTorontoOntarioCanada

Mocked sample for layout; your export may include additional contact fields and filters.

Verified outcomes

Attendee data that outpaces other GTM channels

Verified conference campaigns delivered these outcomes while outperforming typical cold outbound, paid social, and broad-intent lists on reply and meeting conversion—because the motion starts with confirmed attendance, attendee context, and refresh cadence through the show.

  • 95%

    Attending accuracy

    Verified against observed event participation—precision cold lists and rented intent audiences rarely match.

  • 66%

    Reply rate

    From outreach using attendee-specific context—well above typical cold outbound on comparable touches.

  • 52%

    Meeting booking rate

    For qualified replies converted into scheduled meetings—ahead of booking rates we see from paid social and generic nurture paths.

  • 6 hours

    Refresh frequency

    New attendee signals refreshed throughout the event window—faster than weekly enrichment cycles common in outbound stacks.

What You Get

Conference datasets built for action, not decoration

  • Company attendee lists

    Organizations represented at the event, normalized with firmographics and routing fields.

  • People-level attendee lists

    Names, roles, seniority, departments, and contact fields where available.

  • ICP-shaped filtering

    Narrow the dataset by segment, account profile, function, title, geography, size, or campaign objective.

  • Contact enrichment

    Add work email, LinkedIn, and phone fields based on your outreach motion.

  • Conference campaign briefs

    Turn a raw attendee universe into priority account lists for sales, marketing, and partnerships.

  • Refreshes through the event window

    Support pre-event planning, on-site changes, and post-event follow-up.

Who Uses It

One conference dataset, multiple GTM motions

  • Sales teams

    Prioritize accounts, book meetings, and route prospects to the right owners before the show.

  • Marketing teams

    Build segmented invite lists for dinners, side events, webinars, and post-event campaigns.

  • Partnerships teams

    Identify partner prospects, ecosystem companies, and people already gathering in one place.

  • Sponsors and exhibitors

    Know which accounts to target on-site instead of waiting for booth scans after the fact.

  • Founders and operators

    Turn expensive conference travel into a focused list of people worth meeting.

How It Works

From conference brief to outreach-ready data

  1. Tell us the conference and target market

    Share the event, your ICP, target roles, fields, and campaign objective.

  2. We build the attendee dataset

    We assemble company and people-level records, enrich fields, and structure the list for your workflow—sourced from public web activity, event ecosystems, and enrichment workflows.

  3. Your team acts before, during, and after the event

    Use the dataset for meeting-setting, on-site prioritization, dinners, partner campaigns, and follow-up.

Why Impossible Data

Most conference lists arrive too late. We make them useful while the event still matters.

  • Before the show

    Start outreach while calendars are still open.

  • During the show

    Route the right accounts to the right people on-site.

  • After the show

    Follow up with structured context instead of a cold CSV.

  • Built around your ICP

    Every list starts from your market, not a generic attendee universe.

Trusted by teams turning conference signals into pipeline

  • Spinach

  • Cake Equity

  • Jobright

  • Salesgraph

  • Nixo

  • Spara

  • Essia

Tell us the conference. We'll build the list.

Share the event, target accounts, buyer personas, and contact fields you need. We'll map the attendee data package your team can use before the conference window closes.