That's The One alternative
A That's The One alternative for wedding planners.
That's The One is wedding planning software for planners, much like Kruspin: guests, seating, timelines and a client portal. It adds e-signed contracts and hotel bookings at live rates. Kruspin assigns rooms night by night and gives the kitchen, service and front desk their own documents.
The short answer
Choose by the work you do most.
Kruspin fits if you
- put guests in specific rooms night by night and send the front desk the list
- want the kitchen, servers and front desk to get their own documents, not only a timeline
- run weddings at a venue with an in-house kitchen and front desk
- already have a tool for contracts
Not built for proposals, e-signatures or hotel booking
That's The One fits if you
- want proposals and e-signed contracts next to planning
- want guests to book hotel rooms at live rates from the wedding website
- send save-the-dates and e-cards from the same tool
Side by side
Kruspin and That's The One.
What each company's own pages listed on November 3, 2026. Spotted a mistake? Write to [email protected] and we'll correct it.
| Kruspin | That's The One | |
|---|---|---|
| Built mainly for | Wedding planners, agencies and venue teams | Wedding planners, in 7 languages |
| Inquiries and leads | YesForms, website, forwarded email (Kruspin) | YesLead forms (That's The One) |
| Proposals, contracts and e-signatures | No (Kruspin) | Yes (That's The One) |
| Invoices and online payments | No, tracks payments only (Kruspin) | Not listed (That's The One) |
| Client questionnaires | Yes (Kruspin) | Yes (That's The One) |
| Guest list and RSVP | YesMeals and allergies per guest (Kruspin) | Yes (That's The One) |
| Seating chart | YesOn the venue floor plan (Kruspin) | YesSynced to RSVPs (That's The One) |
| Rooms by night | YesWith a front desk list (Kruspin) | Hotel bookings at live rates |
| Wedding day timeline | Yes (Kruspin) | Yes (That's The One) |
| A separate document per vendor | YesDJ, kitchen, service, front desk (Kruspin) | YesTimeline filtered per vendor (That's The One) |
| Wedding website with RSVP | Yes (Kruspin) | Yes (That's The One) |
| Messages to guests | Yes (Kruspin) | YesE-cards (That's The One) |
| Client access | YesSame wedding, internal notes hidden (Kruspin) | YesClient portal (That's The One) |
| Moodboards and style guides | YesMoodboards kept with the wedding (Kruspin) | Yes (That's The One) |
| AI assistant | YesWorks across the app, with your approval (Kruspin) | Not listed (That's The One) |
| Native phone app | No, works in the phone's browser (Kruspin) | Not listed (That's The One) |
How we checked
We read each company's public homepage, feature, pricing and help pages on November 3, 2026. “Not listed” means we didn't find the feature there, not that it's missing from the product. Features change, so check their sites too. If you work at one of these companies and something here is wrong or out of date, write to [email protected] and we'll correct it. That's The One are trademarks of their owners; Kruspin is not affiliated with them.
Sources: thatstheone.com, That's The One pricing, That's The One wedding accommodation, That's The One timelines guide, That's The One sales pipeline guide.
Day to day
What you stop doing by hand.
01Rooms
Rooms assigned night by night.
Friday arrivals and Saturday stays are planned separately. The front desk gets an alphabetical list with every guest's room for each night, including who changes rooms.
02Vendors
Every vendor gets their own version of the day.
The DJ's copy has the shared schedule plus the DJ's own cues. Servers get the table map with seat numbers and each guest's meal. Send it as a PDF or a link.
03The couple
The couple adds guests and asks questions in the wedding you plan.
Each question sits next to the item it's about. Your internal threads and tasks stay with your team.
Start with your next booked wedding
Finish the weddings already in progress where they are. The two tools don't sync.
Upload the guest list
Export it as CSV or Excel, upload it and match the columns in the preview.
Invite the couple when you're ready
They add guests and responses themselves.
Frequently asked questions
Questions about switching from That's The One.
Didn't find your answer? Write to us through support.
How is Kruspin different from That's The One?
They overlap a lot: guests, RSVP, seating, timelines, moodboards and a client portal. That's The One adds proposals, e-signed contracts and hotel bookings at live rates. Kruspin adds rooms assigned night by night with a front desk list, and documents for the kitchen, service and front desk built from the same guest list.
Does Kruspin handle contracts and payments?
No. Kruspin tracks the budget, vendor deposits and a payment plan, but it doesn't send contracts for e-signature, issue invoices or take card payments. Keep the tool you use for that today.
Can I bring guest lists from That's The One?
Yes, if your current tool or spreadsheet exports them. Upload a CSV or XLSX file, or paste rows, and match the columns in the preview. It's a one-time import; nothing syncs back.
Can my couples log in?
Yes. Invite them by email when you want them to add guests and responses themselves. They work in the same wedding, without your internal threads and tasks, and they can see the budget but not change prices or payments.
What happens after I create an account?
Your account opens with a sample wedding that already has guests, a seating chart, rooms and vendor documents, so you can try things before you set up your own.
See it on a wedding that is already set up.
Your account starts with a sample wedding: guests, a seating chart, rooms and vendor documents, ready to change.