Formidable: The JavaScript Consultancy Trusted by Engineers
We’re Formidable —

The JavaScript Consultancy Trusted by Engineers.

A JavaScript Consultancy Built for the Modern Web

Formidable is a Seattle, Denver, Phoenix, and London-based engineering consultancy and open source software organization, specializing in React.js, React Native, GraphQL, Node.js, and the extended JavaScript ecosystem.

Since 2013 our agile team has worked with companies ranging in size from startups to Fortune 100s, to build quality software and level up engineering teams.

Launching a new JavaScript project? Need help with an existing project?

Work With Us


Progressive Web App

Universally Accessible Ordering for Established and Emerging Markets


React Native Enhancements

Using React Native to Deliver Smart Feature Enhancements to the Three Million DPD App Users

Dynamic Pricing Dashboard

User-Friendly Data Visualizations for Complex Dynamic Pricing Models

What can we do for your company?

Talk to us


We approach each project with a long-term view, ensuring that sustainability, maintainability, and stability are always at the core of our decisions. Our objective is to help you create quality software that scales well, performs better, improves user satisfaction, and helps you achieve your business goals.

Formidable utilizes agile methodologies to ensure an efficient, adaptable process that helps clients meet their project goals and objectives. We quickly identify solutions (no 10-week discovery phases here) and work with you to create an efficient plan to ensure that we’re always delivering. Embedding with your team, we also teach best practices to ensure that your developers can carry each project into the future once our work is done.

Want to learn more?

What We Do

The Formidable Team

Our team of JavaScript experts is deeply invested in the JavaScript community. We are React core contributors, open source advocates, and creative thinkers devoted to improving the modern web. Our team is well-known for our contributions to the open source software community, creating software used by everyone from Airbnb to USAFacts. We regularly speak at conferences to share our expertise with the JavaScript community, and attend even more to keep at the forefront of the newest frameworks and technologies.


Open Source

Check out some of the tools and products we’ve made in support of advancing the open web.


An ecosystem of modular data visualization components for React. Friendly and flexible.


A React.js based library for creating sleek presentations using JSX syntax with the ability to live demo your code!


Explore, learn about, and perform static analysis on npm packages in the browser.


Universal React Query Library is a blazing-fast GraphQL client, exposed as a set of ReactJS components.

All Open Source Tools

Formidable sightings

React LoopJune 19, 2020Chicago, ILInfo
React RallyAugust 13-14, 2020Salt Lake City, UTInfo
React Summit AmsterdamSeptember 11, 2020AmsterdamInfo