Overview
A complete look at EventOS, Event Hubs, features, workflows, and free trial options — and how everything works together.
Prefer to explore before creating an account?
Try the interactive demo to see how EventOS manages vendor applications, registrations, sponsors, volunteers, announcements, QR code check in, event communications, and operational workflows from one platform.
Manage vendors, registrations, sponsors, volunteers, and event operations from one centralized platform.
Review applications, approve vendors, collect payments, and track participation.
Manage attendee registrations, capacity limits, communications, and check in.
Organize sponsor tiers, logos, deliverables, and relationships.
Coordinate volunteers, assign shifts, and improve event day operations.
Use QR code check in and attendee tracking to simplify event day logistics.
EventOS by HoldThat Systems is event management and event operations software for coordinators, organizers, vendors, sponsors, and volunteers. EventOS powers Event Hubs — done-for-you client portals and public event microsites — so everything from vendor management and registrations to sponsor pipelines, volunteer coordination, announcements, and QR code check in lives on one connected platform.
Pricing
No setup fees. No activation fees. Custom branding is included on every plan. Switch or cancel anytime.
Starter includes a 14-day free trial — no credit card required. Professional and Enterprise are paid from day one.
Get organized without juggling spreadsheets and DMs.
Best for a single annual festival, church, or small market.
No setup fee · cancel anytime
The operating system for serious event coordination.
Best for multi-event organizers, growing markets, and busy venues.
No setup fee · cancel anytime
High-volume event operations with hands-on support.
Best for organizations running 30+ events/year that want a concierge setup.
No setup fee · cancel anytime
Need something custom or non-profit pricing? Contact us.
Hands-on help if you want it — completely optional. Starting at $99 one-time.
Guided setup of your first event, team, and dashboards.
We configure vendor applications and registration forms with you.
Announcement templates, staff roles, and operational walkthrough.
Want help? Contact us to scope an optional setup package.
Optional extras you can layer onto any plan.
Serve your public event pages on your own domain, e.g. events.yourorg.org. Available on any plan — set it up in Settings → Organization. You'll add a couple of DNS records after checkout, then it's live with HTTPS automatically.
Need extra storage or SMS notifications? Contact us — we'll scope it for your event.
Event Pass · pay per event
No subscription required.
Perfect for annual community events, churches, nonprofit organizations, local markets, and smaller vendor events.
60 days of access
Best for expos, conferences, festivals, multi-team event coordination, and larger vendor operations.
90 days of access
For municipalities, multi-organization events, recurring large-scale productions, and organizations needing operational support and onboarding assistance.
Tailored deployment timeline
Event Pass purchases unlock a time-bound workspace for a single event. For ongoing operations across multiple events, choose a subscription plan above.
| Feature | Starter | Professional | Enterprise |
|---|---|---|---|
| Limits | |||
| Active events at once | 1 | 5 | Unlimited |
| Events per year | 6 | 30 | Unlimited |
| Registrations / month | 200 | 2,000 | Unlimited |
| Team seats | 2 | 10 | Unlimited |
| Storage | 1 GB | 10 GB | 100 GB |
| Active sponsors | 10 | 100 | Unlimited |
| Vendor applications / event | 50 | 500 | Unlimited |
| Modules | |||
| Public event page | |||
| Check-in app (QR + manual) | |||
| Nametag printing (PDF) | |||
| Deadlines & tasks | |||
| Incident log | |||
| Announcements | 5/month | Unlimited | Unlimited |
| Volunteer shifts + auto-assign | |||
| Sponsor tiers & logos | Basic | ||
| Vendor approval workflow | Basic | ||
| Partner application pipeline | |||
| Outreach templates + AI rewrites | |||
| Advanced reports & dashboards | |||
| Branding & domain | |||
| Custom branding (logo, name, colors) | |||
| Multi-organization workspace | |||
| Integrations & exports | |||
| ICS calendar feeds | |||
| CSV exports (all modules) | |||
| Stripe checkout & customer portal | |||
| Support & security | |||
| Support | Email + chat | Priority tickets, live chat & Slack | |
| Activity log | |||
| Role-based permissions | |||
| Onboarding & migration | Self-serve | Self-serve | Concierge on request |
| One-time activation fee | None | None | None |
| Optional setup assistance | from $99 | from $99 | from $99 |
Don't see your question? Ask us directly.