Top Ruby on Rails Developer | Top App Development Company

We're A Custom Software Development Agency That Builds Your Product From Idea To Launch.

Companies partner with us when they need to ship faster without compromising quality.

Our senior-level U.S.-based product team helps you get to market quickly with high-quality software and no risk—guaranteed outcome, guaranteed price, and a 12-month bug-free warranty

Let’s Build Together
See Our Work
Kolide by 1Password
Optimizely
Whoop
Salsify
Fitbit

We Accelerate Your Product Development

The Gnar is your integrated software partner, injecting rocket fuel into your development engine. Ship your product 3x faster while competitors are still hiring developers.

Our collaborative approach means we're not just writing code – we're thinking through solutions, spotting opportunities, and actively working to accelerate your path to market.

Get Reliable Software Built For Growth
Kolide by 1Password
Optimizely
MGB
MBTA
Whoop
SystemOne
Salsify
Ollie Pets
Fitbit
eZcater
First Line Technologies
Vermont Mutual
MA Department of Early Education and Care
OnePak
AARP Foundation
Kolide by 1Password
Optimizely
MGB
MBTA
Whoop
SystemOne
Salsify
Ollie Pets
Fitbit
eZcater
First Line Technologies
Vermont Mutual
MA Department of Early Education and Care
OnePak
AARP Foundation

What’s Your Gnarly Problem?

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Gnar Ideate

Let’s Get That Great Idea Into a Working Product

You’ve got a vision but need help getting started. Gnar Ideate transforms your concept into a clickable prototype, guiding you through user journeys, wireframes, and a development estimate. This 5-step process begins with a Discovery Workshop to refine your idea - and over a 2-month sprint, we bring it to life!

Gnar Ignite

Ready to Build? Let’s Launch Your Product

You’re ready to bring your product to life – but how do you get it there? Gnar Ignite is how we help build and launch your products to market. We set up a foundational codebase, grounded in best practices, and follow an agile development process to build a scalable product (and we do it fast!)

Gnar Integrate

Complex integrations? No Problem.

Need your product to play nice with external tools or platforms? Gnar Integrate connects your software with third-party services to enhance functionality and ensure smooth interoperability. From APIs to complex system integrations, we’ve got you covered.

Gnar Embed

Supercharge Your Team with Gnarly Pros

Need extra hands or specialized expertise? Gnar Embed integrates our experts directly into your team. Whether you’re scaling fast, navigating a skills gap, or meeting critical deadlines, our embedded engineers are ready to step in.

Why Gnar?

The only dev shop that guarantees bug-free code for 12 months or we fix it free. 250+ brand trust us with $50M+ in product development.

Guaranteed Price

No risk of your project cost ballooning and ruining your budget. Any overages are on us.

Senior Talent

We’ve done this before. Our teams deliver production-ready code within the first week.

Guaranteed Outcome

We’re so confident in our work that we’ll fix any nonconforming, released code for free, for a year.

100% U.S.-Based Engineers

Same timezone. Same language. A talented team that is as good at communicating as they are at building product.

Test-Driven Development

Our code is covered by a robust suite of automated tests - so updates work as expected and don't break existing features.

A Founders Mindset

We treat your product like we'd treat our own. A founder has eyes on every engagement.

Let’s Get Started

“They never fail to deliver. Future clients should trust them and take advantage of their extensive knowledge and expertise.”

Technical Project Manager
Vermont Mutual

Our Work In The Wild

Previos
Next
Ideate
Ignite
Embed
Integrate

React + Next.js

Building an Engine for Third-Party Integrations

WHOOP was growing fast, and their engineering team faced a backlog of third-party integrations. We stepped in as an extension of their team, building a robust testing application, creating self-service documentation, and streamlining onboarding for new partners. 

By taking on these integrations, we freed up WHOOP’s engineers to focus on scaling their core product while creating a smooth experience for their partners.

Check Out The WHOOP Case Study
Ideate
Ignite
Embed
Integrate

React

Empowering Device Security with Collaboration

Kolide needed extra engineering support to expand their SaaS platform and develop mobile and desktop apps for secure device management. We embedded engineers directly into their team, helping them improve existing features and build new ones.

Together, we launched Kolide’s mobile app on Google Play and Apple App Stores, enabling secure device monitoring and keeping information protected.

Read the story of Kolide
Ideate
Ignite
Embed
Integrate

Ruby on Rails

20x User Base Growth & Shark Tank Success

When Qeepsake approached us, they had a promising prototype but needed help building anapp to scale their vision. We built a cloud-based platform, optimized their onboarding UX, and integrated messaging and payment systems to enhance functionality.

Our work helped Qeepsake grow their user base by 20x and secure a deal on Shark Tank. Today, they’ve saved over 50 million memories for more than 700,000 families.

See Our Qeepsake Dev Process

How to Get Started with The Gnar

Let’s Build Together

Step 1. We Collaborate

Our process always starts with a deep dive into your goals, challenges, and objectives. Basically, we get down to the problems holding you up – and start to create a plan to break through the bottlenecks.

Step 2. We Design

We take what we’ve learned and translate it into actionable designs and strategy. From wireframes to architecture, this phase helps us tailor your solution to your exact needs – so it’s right the first time.

Step 3. We Execute & Optimize

Now the real fun begins. Our team works with you to develop, deploy, and optimize your software solution. We work fast but don’t cut corners – so your solution is ready to launch, and fast.

Ready to take the first step? Let’s find time to chat.

Latest Insights

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Expert Software Development Consulting Services

Expert Software Development Consulting Services

Been burned by agencies that over-promised and under-delivered? The Gnar offers guaranteed outcomes, fixed pricing, and a 12-month bug-free warranty. 100% US-based senior engineers.
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Frequently Asked Questions

We're technology-agnostic but have deep expertise in modern tech stacks including Ruby on Rails, React, React Native, Next.js, Node.js, Hotwire (Turbo and Stimulus) and Golang for web development and mobile development frameworks. Our experience spans cloud platforms, database technologies, and integration frameworks, allowing us to choose the right tools for your specific needs.

Building a quality product takes time. Typically, a new product development cycle runs 4-6 months from concept to launch. Design phases usually take 6-8 weeks, while development timeframes vary based on complexity. We believe in being transparent: apps don't get built in two weeks, but we ensure every sprint delivers tangible value.

We operate on a time and materials basis with a straightforward billing approach: you pay for the people and hours needed to deliver your project. This model provides flexibility and transparency while keeping things simple. Our dedicated team structure means you get consistent, focused attention without paying for unnecessary resources.

Our senior-level U.S.-based product team delivers exceptional value through proven development practices and a focus on long-term scalability. We pride ourselves on creating high-quality, maintainable code that grows with your business, minimizing costly rework and ensuring your investment pays dividends well into the future.

For 12 months after your project's release, we'll repair any nonconforming, released code at no charge. This warranty is possible because of our rigorous testing practices and focus on quality, which helps prevent regressions and defects.

Our engineers embed seamlessly into your workflow, acting as an extension of your team. Each engineer focuses on one project at a time, ensuring dedicated attention to your needs. We also provide product management and design resources as needed.

While our core focus is on development rather than maintenance, we offer continued partnership options for projects we've built through the Ignite package. We can help plan future phases, scale your infrastructure, or transition to your internal team.