
Okay, major news: the wedding planning tool we have all been waiting for is finally here!
Meet That’s The One — a dreamy, easy-to-use platform that brings all of the logistics of planning into ONE PLACE. RSVPs, ecards, website, budget, tasks, timelines, floor & seating plans, vendor payments, you name it!

Right now the average person uses 7-10 different tools to plan their wedding. No wonder the process is so stressful, error-prone and expensive! Enter That’s The One!
Launched initially for professional planners and their clients, That’s The One is opening the doors to couples. You can start independently, or find a planner using their new curated planner directory and book them for any type of support, from a one-hour call to full-service planning experience! We love that you can search based on starting price, language, service or destinations they have worked at. So if you are dreaming of that wedding in Europe, you can search specifically for planners that have worked in France or Greece, for example.
Oh, and us wedding nerds are super star-struck because That’s The One has event planning titan, the Colin Cowie onboard as an angel investor!! That’s The One is a VC-backed startup, on a mission to make wedding planning as easy as falling in love.
Let’s get into everything you need to know about your new favorite modern, digital ‘all-in-one’ planning platform!
From Planning Your Big Dream…

Let’s take one example of how That’s The One saves you time. You know the whole maddening reception seating chart part of wedding planning? Welcome to type-a organizational heaven. Drag & drop your guests into their seats using That’s The One’s software. Add furniture in their exact measurements, so you have peace of mind that everything will fit as expected. Click “export a PDF” and get an automated document that summarises where your guests are sitting, their meal choices, and dietary requirements – all synced automatically from your guest RSVPs.
…To Realising Your Big Day!

And bring your vision to life, with peace of mind!
Let’s Get Planning
“As a former bride, I know firsthand how overwhelming it can be to sift through endless listings on Google, mass directories, and Instagram—without any real way to verify planners, understand their experience across countries, or know their budget range,” says Kat Trefilova, CEO & Founder of That’s The One.
“Having built the leading planning tool used by couples and planners around the world, TTO has accumulated valuable data and insights to help drive connections. We worked closely with one of our angel investors and Vogues #1 planner, Colin Cowie, to create a directory that not only helps couples find trusted planners but also enables planners to showcase their services effectively and reach their ideal clients—whether it’s a multicultural couple planning a wedding in Italy or a UK couple exploring European destinations within their budget.”

“We care about quality of planners, not quantity,” says Kat.
In our opinion, the new curated global planner directory is one of the software’s most exciting features. Keeping up with the rise of destination weddings, TTO (That’s The One) was designed specifically to help couples easily find planners around the world that fit their budget and style. The profiles are super detailed, and they are selected based on their proven expertise, deep local knowledge and a strong track record of working with international clients – ensuring a seamless, transparent experience.
Did you know that couples hiring a wedding planner spend, on average, 27% less than those who plan their weddings independently?
And — good news for planners — TTO was first and foremost, built with their priorities in mind. The platform ensures that planners receive serious inquiries that align with their services + budget, allows them to start planning with them seamlessly, and ultimately, grow their businesses.
TTO’s planning software reduces planning time by 35% by uniting everything in one single place and creating one source of truth for all involved – couples, planners, vendors and guests. It’s the switch into the modern era that the wedding planning industry has been patiently waiting for.
All in one spot.
Here are some more of our favorite features:





“The wedding industry has incredible potential for transformation,” says Kat. “Coming from a tech background, I saw an opportunity to bring clarity, ease, and innovation to a process that hasn’t evolved in decades. Couples and planners deserve a seamless, modern experience that mirrors the joy of a wedding itself- it shouldn’t be this stressful!”
Listen, don’t take it from us. Take it from Colin Cowie 🤩: “This is the best software I’ve seen in my 35 years in the wedding industry.”

“Our mission is to make wedding planning as easy as falling in love,” says Kat. And wow, it is safe to say we are head over heels ❤️.
And, to celebrate the beginning of engagement season, That’s The One is opening the tool to couples for the first time for $15/pm. For any questions, email them at support@thatstheone.com and make sure to follow their journey on IG: @thatstheone.io
Happy planning, everyone! We can’t wait to see the wonderful weddings you create with That’s The One!
This post is sponsored by That’s The One. All content and opinions are that of GWS. Thank you for supporting the brands that help keep Green Wedding Shoes running.