Your App Development Partner

Underbelly is an award-winning app development company in the heart of Silicon Slopes. We design & build digital products used by millions of people each day.

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Trusted by top brands

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We can help

Skip the costly set-up of an in-house team and get straight to the talent.

Success stories

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Ideas we've brought to life

Work samples

Web and mobile application designs for tablet and phone

Helping Square design tools for sellers to manage risk and stay on top of their business.

Square Product Design
Mobile app design for millennial showing feed

Crafting a user experience dedicated to helping couples feel connected.

Complex app design

Helping Facebook create a narrative around insights by building tools to help users better understand their data.

Facebook Creator Studio


"Underbelly is very responsive to creative feedback and collaborates seamlessly with our marketing and brand teams – making production and quality predictable and much less effort than expected."
Jacob Esparza
Proxy has simply eliminated 90% of the time that I set aside for scheduling showings. It has made it such an easy process. I absolutely love it.
Ross Patterson
Utah Real Estate
They caught on to our design routines very quickly and have been a standout designer throughout the entire engagement.
Joanna DeLong

Bring your vision to life

  • 1
    Tell us your idea
    and we'll develop a custom approach that works for you.
  • 2
    Meet your team
    and collaborate throughout the creative process.
  • 3
    Delight your customers
    with an exceptional product and experience.

Let's talk

about your big idea.

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The Webby Awards
The Webby Awards are awards for excellence on the Internet presented annually by the International Academy of Digital Arts and Sciences.
Inc 5000
The Inc. 5000 lists the 5,000 fastest-growing private companies in the US.
5-Star Rating on
Clutch is a data-driven field guide for B2B buying and hiring decisions.

Not quite convinced?

Get in touch with us at
Common Questions
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