Skip to main content
The AI-Native Custom Software Partner

Custom software, AI strategy, and modernization, all backed by a guarantee.

We help B2B leaders adopt AI, build new software, and modernize aging systems.

Senior US-based engineers, AI-Native delivery, and the industry's only triple guarantee: fixed price, guaranteed outcome, and a 12-month bug-free warranty.

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

We help you ship and run modern software

We are your senior software partner, not an extra set of hands. AI-Native delivery means the same scope ships in less time and at a lower price than a traditional shop, and the triple guarantee is the proof it does not come from cutting corners. We think through the problem with you, ship production-ready software, and stand behind every line of it.

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

Top Brands Trust
The Gnar To Get It Done

What's Your Gnarly Problem?

AI Strategy & Fluency

Become AI-Native

You need to adopt AI but your team hasn't started and you don't know where to start. We deliver the strategy, train your people, and ship the first automation, so the investment finally shows a return.

Custom Software Development

Build It Right the First Time

Build the software your business runs on, with a guaranteed price, a senior US-based team, and a 12-month warranty. Plan it right, build it once.

Legacy Software Modernization

Modernize Without the Migration Risk

Modernize the experience without ripping out the system you rely on, or rebuild it when the old stack can't be saved. Fixed price, guaranteed outcome.

Not sure where to start?

Let's Find the Right Path

Tell us where you are and what you're trying to do. We'll point you to the right starting line, even if it isn't us.

Why Gnar?

Ten years, 100+ projects, $50M+ in product development. Here is what that buys you.

Guaranteed Price

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

AI-Native delivery

Senior engineers ship with AI tooling as a teammate, so the same scope reaches production faster and at a lower price.

Guaranteed Outcome

We define success in writing up front. The software works the way we agreed, or we fix it at no additional cost.

Senior US team

No offshore, no junior bench. You get senior US-based engineers in your time zone, on every engagement.

12-month warranty

For a full year after launch, we fix any non-conforming code at no charge. Most agencies stop at 30 to 90 days.

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

Not sure where AI fits in your product roadmap? Find out in 2 minutes.

Take Our AI Readiness Assessment

Our Work In The Wild

Previous
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 an app 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 plan

We start with your goals, your constraints, and the problem behind the request, then turn it into a plan with a guaranteed price.

Step 2. We Build

Senior US engineers ship in fixed-price milestones, hard parts first, so you see working software at every step.

Step 3. We back it

We stand behind the build with a guaranteed outcome and a 12-month warranty, and support it as long as you need.

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

Latest Insights

See More Insights
Engineering Insights
AI Evals Are Not So Different From the Tests You Already Write

AI Evals Are Not So Different From the Tests You Already Write

Moving from deterministic code to LLMs doesn't mean abandoning your testing rig—it means evolving it. Discover why "evals" are essentially the automated tests of the probabilistic world and how to apply the testing wisdom you already have to ship AI features with total confidence.
Read full article
Product Insights
Thoughtbot Alternatives: Choosing the Right Software Development Partner in 2026

Thoughtbot Alternatives: Choosing the Right Software Development Partner in 2026

Thoughtbot alternatives for software development in 2026. The Gnar offers guaranteed milestone pricing, a 12-month bug-free warranty, and a 100% US-based team.
Read full article
Product Insights
How Much Does Custom Software Development Cost? (The Real Answer)

How Much Does Custom Software Development Cost? (The Real Answer)

Most software projects go over budget because they're priced before the problem is understood. Learn how structured discovery gives you a guaranteed build price before development starts.
Read full article
Previous
Next
See More

Frequently Asked Questions

We price by milestone, and the price is fixed before we start. The triple guarantee means the price holds, the outcome is guaranteed, and the build carries a 12-month bug-free warranty. The one exception is Embed, our staff augmentation model, which is billed time and materials because we are reinforcing your team rather than running the project.

Three things. AI-Native delivery, so the same scope ships faster and at a lower price. A 100% US-based senior team with a founder in every engagement. And the industry's only triple guarantee: fixed price, guaranteed outcome, and a 12-month bug-free warranty. Most agencies offer none of the three.

We help B2B leaders in three ways: AI Strategy & Fluency (adopt AI and ship a real automation), Custom Software Development (build the software your business runs on), and Legacy Software Modernization (modernize or rebuild an aging system). Every build is backed by the triple guarantee.

It depends on scope, but AI-Native delivery compresses the timeline. Work that takes a traditional shop six months often ships in three to four with us. We give you a milestone plan with real dates before the build starts.

For a full year after release, we repair any non-conforming code at no charge. The warranty is possible because our engineering practice is rigorous enough to stand behind it. It covers code that doesn't work as specified; feature additions and ongoing support are handled through our maintenance offering.

Yes. That's Embed, our staff augmentation model. Senior US engineers work as an extension of your team when you need velocity or a specific skill set. Embed is billed time and materials and is the one engagement that does not carry the triple guarantee.

The codebase is yours, documented for hand-off, and covered by the 12-month warranty. You can transition to your internal team with our support, or keep us on through Maintain, our optional monthly support retainer.

The AI-Native Custom Software Partner for B2B leaders.

We help you adopt AI, build new software, and modernize what you already run, all backed by the industry's only triple guarantee. Senior US-based engineers, AI-Native delivery, and software we stand behind for a full year.

Let's Build Together

The Gnar is a fire-breathing, Boston-based software partner made of 
problem-solvers.

We help B2B leaders adopt AI, build new software, and modernize the systems they already run.

Senior US-based engineers, AI-Native delivery, and the industry's only triple guarantee: fixed price, guaranteed outcome, and a 12-month bug-free warranty.

Let’s Build Together
SolutionsAI Strategy & FluencyCustom Software DevelopmentLegacy Software Modernization
ServicesGnar AI SparkGnar IdeateGnar IgniteGnar ForgeGnar EmbedGnar Integrate
Company
Our WorkAbout UsContactSchedule Meeting
Resources
BlogAI Readiness

The Gnar Company is the AI-Native custom software partner for B2B leaders. We help you adopt AI, build new software, and modernize aging systems, backed by senior US-based engineers and the industry's only triple guarantee.

© 2026 The Gnar Co. Inc | 117 Kendrick Street, Suite 300 | Needham, MA 02494
Privacy & Cookie Policy
Sitemap