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Unspecified Software Co. · Spring Grove, Illinois

We build software that brings people closer.

Unspecified is a small, independent software company founded by Clark and Carrie Sell. Our product is Troth: a private, encrypted home for your marriage, built by two people who've been married for 23 years.

Troth · Coming to iPhone in 2026

01Our product

Troth. A private, encrypted home for your marriage.

The conversations, letters, memories, and promises two people are keeping, in one place that belongs only to them. Not the group thread. Not the camera roll. Not a company's servers.

  • End-to-end encrypted between two iPhones. Nothing leaves your devices.
  • No cloud, no AI, no company in the middle, including ours.
  • Built by Clark and Carrie Sell with the couples on the waitlist.

Who it's for

For any marriage worth doing well.

  1. Year oneStill learning to live in the same room.
  2. Year sevenKids are small; the marriage is easy to overlook.
  3. Year fifteenDeciding whether to grow into the next season.
  4. Empty nestersFiguring out who they are as two again.
  5. Any hard yearSomething happened, and now they're rebuilding.

Not only for marriages in crisis, and not only the ones with everything figured out. It's for the couples in between, which is to say most of us.

02Why we exist

Most software is built to hold your attention. Ours is built to hand it back to the people in your life.

We've built products, platforms, and communities that outgrew us. The common thread was never a technology. It was a belief that the best thing software can do is put two people in the same room, even when they aren't. Troth is that belief, built.

03Who we've worked with

Real companies. Real people. Real communities.

Before Troth, we spent years helping founders and teams turn the people around their business into a community. These are some of them.

  • Dominick DeStasio

    Dominick DeStasio

    ForceBuilders

  • Ashley Athena Abboushi

    Ashley Athena Abboushi

    The A-List Global

  • Angela Isherwood

    Angela Isherwood

    Olive and Atlas Travel

  • Troy Migut

    Troy Migut

    Geneva Autobody

  • Rachel LaMantia

    Rachel LaMantia

    Masterpiece Bookkeeping

  • Josh Gertz

    Josh Gertz

    ForceBuilders

  • Fernanda Migut

    Fernanda Migut

    Chicam Studios

Companies and communities

  • THAT Conference
  • ForceBuilders
  • The A-List Global
  • Olive and Atlas Travel
  • Geneva Autobody
  • Masterpiece Bookkeeping
  • Chicam Studios
Clark and Carrie Sell, founders of Unspecified Software Co.
Clark & Carrie Sell

04Who we are

Two people, one company, and a very specific reason for building it.

Unspecified is run by Clark and Carrie Sell. Clark has spent more than 25 years building software, from enterprise engineering to founding THAT Conference, one of the largest community-run technology conferences in the country. Carrie runs the company's operations.

They've been together since 2000 and married for 23 years. That's where Troth comes from.

Clark Sell on stage at THAT Conference in front of a slide that reads: What has heart and meaning for you?
Clark on stage at THAT Conference

05Speaking

Clark speaks.

Keynotes, workshops, and podcasts on building software, building communities, and the people side of both. Twenty-five years of shipping, a decade of running THAT Conference, and now Troth.

06Say hello

We read everything.

Curious about Troth, want to work together, or just want to say hi? Email is the fastest way to reach us.

hello@unspecified.io