About Tandum

We're on a mission to simplifyservice business management

Built by people who understand the challenges of running a service business, because we've been there too.

Our Story

Tandum LLC was founded in September 2025 with a simple mission: make business management software that actually works for service businesses.

After years of running service businesses and struggling with existing tools, I realized most software was either too simple (just a calendar) or too complex (enterprise systems that take weeks to set up).

So I built Tandum—a platform that's powerful enough for agencies managing multiple clients, yet simple enough that you can start taking bookings in minutes.

We're just getting started, but the vision is clear: help service businesses spend less time on admin work and more time doing what they love.

Our Values

These principles guide everything we do, from product decisions to how we treat each other.

Customer First

We build features that solve real problems for service businesses, not just what looks good on paper.

Move Fast

We ship quickly, iterate constantly, and aren't afraid to pivot when we learn something new.

Better Together

Great products are built by diverse teams collaborating openly and supporting each other.

Simple Solutions

Complexity is easy. Simplicity takes work. We choose simplicity every time.

Our Journey

From a small side project to serving thousands of businesses worldwide.

Sep 2025

The Beginning

Tandum LLC officially registered. Started building the platform from scratch.

Oct 2025

Beta Launch

Launched beta version with core booking and invoicing features.

Q4 2025

AI-Powered Assistants

Launching autonomous AI assistants to automate scheduling, customer communication, and administrative tasks.

2026

Marketplace & Discovery

Building a directory for client discovery, reviews, and helping businesses connect with customers.

Meet the Team

We're a diverse group of builders, designers, and problem-solvers passionate about helping businesses succeed.

👨‍💼

Sangmin Lee

Founder & CEO

Building the business management platform I wish existed when running my own service business.

Our Mission

To empower service businesses with simple, powerful tools that help them grow. We believe great software should get out of your way and let you focus on serving your customers.

Join us on this journey

Whether you're a service business looking for better tools or someone who wants to help build them, we'd love to hear from you.