Testlio helps more than 2 billion people use great apps

With robust client services, a global network of expert testers, and a comprehensive software testing platform, we provide a suite of flexible and on-demand testing solutions.

Learn more


full-time employees (US & Europe)


people use the products we test


client tests executed


test runs completed


less than 3% of applicants are accepted into the network


tester languages


tester countries


devices covered, all around the world


expert testers


client nps score

Awards and Recognition

Official member of the Forbes Technology Council

G2 High Performer
Summer 2020

G2 High Performer
Fall 2020

G2 High Performer
Winter 2021

About Testlio

Testlio is the leader in managed app testing and originator of networked testing. With robust client services, a global network of validated testers, and a comprehensive software platform, we provide a suite of flexible, scalable, and on-demand testing solutions: end-to-end, usability, localization, functional, payments, and more.

Testlio clients include Amazon, American Express, CBS, Microsoft, the NBA, and SAP. Collectively, our clients power more than 2 billion users. When apps must perform brilliantly, Testlio helps ensure world-class customer experiences. In any location. On any device. In any language.

Meet our leaders

Kristel Kruustük
Founder & Chief Testing Officer


Marko Kruustük
Founder & COO


Steve Semelsberger


Summer Weisberg
Head of Services


Jaanus Ranniit
Head of Platform


Kerli Rungi
Head of Learning & Growth


Michelle Surya
Head of Accounts


Kaspar Kikerpill
Testing Network Director


Heldin Lind
Head of HR


Meet some of our people

We passionately test to fuel amazing app experiences.

Our purpose is behind everything we do. It is why we exist. It grounds us in a sense of collective meaning. There are three parts to our purpose:

Passionately test

This is what we do at the most fundamental level. We are a managed app testing company that provides great people, a robust network, and world-class technology.


As a managed service provider, we enable. We equip. We ignite.

Amazing app experiences

Testlio helps make sure that our clients’ apps — and the real-world experiences they drive — are exceptional. Thoughtful. Innovative. Great. Already, our clients’ apps touch more than 1.5 billion people each month, worldwide.

Our Values

With six values tethered to the employee experience and a sense of purpose that drives our day-to-day, Testlio is unstoppable in our quest to fuel amazing app experiences.


Give a damn

Care about what you do. Channel your passion. Be a self-starter. Deliver surprisingly great client experiences. Find ways to be hopeful, even when it’s hard.


Challenge yourself

Try things that scare you. Be willing to fail. Get out of your comfort zone. Develop resiliency, especially through thoughtful recovery.


Team is everything

Be humble, honest, authentic. Make others around you better. Practice generosity. Be transparent. Communicate. Really get to know people you work with—including our clients.


Be kind

Help without being asked. Seek to understand first. Demonstrate compassion. Foster meaningful relationships. Be thoughtful and respectful. Show appreciation.


Make an impact

Be client-centric. Prioritize important things. Push for meaningful results. Challenge the status quo. Seek to transform Testlio and our industry.


Foster inclusion

Strive to hire and collaborate with people of broad identities. Welcome people. Respect individual differences. Create opportunities for equity. Embrace alternative perspectives. Nurture feelings of belonging.


We are a globally distributed company. We embrace our Estonian origins with hubs in Tallinn and Tartu. Our freelancers work in 150+ countries. Our US team works mostly from home offices with clusters in Austin, the Bay Area, and Southern California. Below are some of the places you can reach us.

Tallinn, Estonia

Telliskivi 60 Estonia, 10412

Tartu, Estonia

Narva mnt 3 Estonia, 51009

Austin, US

2021 Guadalupe St. Suite 260, Austin, TX 78705

Palo Alto, US

345 California Ave, Palo Alto, CA 94306

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