About Us

Sub Guru caters to a diverse range of studios, from Boutique Studios to Fitness Clubs, offering customizable solutions tailored to meet the unique needs of every studio.

Our Mission:

At Sub Guru, our mission is to provide clients with a reliable management solution, alleviating the common challenge of finding substitute instructors for classes. Whether you need to secure a substitute three months out or three hours before a class, Sub Guru is designed to match every class with the most suitable instructor.

Our Purpose:

Sub Guru's tools empower teams in three key ways

  1. Consistent High-Quality Customer Service: Facilitate thoughtful communication to ensure a consistent and high-quality experience for customers.
  2. Well-Informed Internal Systems: Enable the development of well-informed internal systems through trackable data, enhancing the efficiency and organization of studio operations.
  3. Community Growth and Team Collaboration: Foster community growth and enhance team collaboration, creating a positive and collaborative environment within the studio.

Our Values

1. Integrity

Your time is valuable. Through compassionate relationship, we will always do what we say and honor our promises with transparency. We will always be honest and lead without fear.

2. Inclusivity

We will continually challenge ourselves, others, and our business platform to grow and learn in an environment of mutual concern and respect for the freedom and equal opportunity of all individuals.

3. Courage

We commit to taking risks and asking the hard questions; pushing through the challenges that we all face together as business owners in effort to get to a place of consistency and success.

4. Listening

We learn best when we listen, to your experiences and needs. From your feedback, we grow, shift and build. 

5. Social Impact

Our company was built with the intention of lifting others up through social impact. Our number one priority will always be caring for others and providing opportunity for change. 

Sarah Rasby, M.A.

CEO + Co-Founder

Sarah Rasby is no stranger to the fitness instructor substitution process! She is a former co-owner of a Yoga studio based in Lincoln, Nebraska since 2013. During her experience as a Regional Director, she found that quality instruction is the heartbeat of a studio. With the many responsibilities that come along with owning a studio, Sarah desired to build a strong, reliable and intellectual system to find and schedule Substitute Instructors for classes. From all the challenges, mishaps, successes, and mediation, SubGuru was created! Sarah's vision is to build conscious awareness and integrity within the fitness industry, and SubGuru is the management solution to do just that!

Andra Rasby, M.B.A.

COO + Co-Founder

Andra Rasby brings a profound understanding of the sports and fitness industry, backed by extensive experience. Holding an MBA with a concentration in Sports Business, Andra is not only a former Division 1 Athlete but also a certified Yoga Instructor. Her unique perspective as both a Client and Instructor has afforded her valuable insights into Group Fitness and the intricacies of the Instructor Substitution process.
Recognizing a significant gap in finding suitable substitutes for group classes—marked by too many steps, lost emails, and last-minute requests—Andra, driven by a determination to address this issue, collaborated with Sarah to create Sub Guru. Her vision for Sub Guru is clear: "I want Owners, Managers, and Instructors to spend less time worrying about finding the right substitute and more on the class quality." This motivation underscores Sub Guru's mission to streamline the substitution process and enhance the overall experience for those involved in the fitness industry.

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Happy Customers

Sub Guru

Happy Customers


Studio Manager
"Stepping into the management role is difficult. I was filling some big shoes and felt the weight of my new obligations. Sub Guru would have been a huge relief for some of that weight. I am so grateful to have Sub Guru and cannot imagine my life without it!"


Studio Owner
"I am now able to dedicate much more of time towards other important tasks thanks to Sub Guru."


Yoga Instructor
"There is a lot more guilt having to post on facebook or send individual texts to instructors. Sub Guru eliminated that for me and helped me feel more confident."