40 Years of AI Experience

The AI Ecosystem for the Automotive Aftermarket.

The all-in-one AI hub for car projects of any kind. AI-powered answers, verified fitment data, community events, and parts and services sourcing without the chaos.

Join Waitlist

The Problems We’re Solving

Why Is Working On Your Car Such a Hassle?

Even the best repair shops and parts sites leave gaps. ModStock.ai brings it all together, clear answers, trusted parts, and help you can count on.

Scattered Information

Answers are buried across endless forums, blogs, and sites, leaving builders overwhelmed and progress stalled.

Answers are buried across endless forums, blogs, and sites, leaving builders overwhelmed and progress stalled. ‎

Fragmented Ecosystem

Manufacturers, suppliers, and services speak different languages-forcing people to juggle tabs, specs, and uncertainty.

Fitment Chaos

Parts arrive mismatched or incompatible, wasting time, money, and draining the excitement from every project. ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎ ‎

Parts often arrive mismatched or incompatible, wasting time, money, and draining the excitement from every project. ‎ ‎

A Better Way Forward

One Hub. Endless Confidence.

No more waiting, guessing, or second-guessing. Just clarity and confidence from start to finish.

AI-Sourced Parts & Services

Our AI Agent connects you with verified suppliers and trusted providers, confirming fitment before you buy. While others rely on slow, manual research, ModStock.ai instantly validates part and service matches, then coordinates delivery or scheduling.

AI-Sourced Parts & Services

Active Community

Join a thriving network of enthusiasts, mechanics, and clubs. Share your builds, RSVP to events, and collaborate on projects.

Active Community

Join a thriving network of enthusiasts, mechanics, and clubs. Share your builds, RSVP to events, and collaborate on projects.

Active Community

Join a thriving network of enthusiasts, mechanics, and clubs. Share your builds, RSVP to events, and collaborate on projects.

3D Vehicle Models

Visualize your build before you buy. Enter your vehicle’s year, make, model, or VIN, and watch it appear in 3D.

3D Vehicle Models

Visualize your build before you buy. Enter your vehicle’s year, make, model, or VIN, and watch it appear in 3D.

3D Vehicle Models

Visualize your build before you buy. Enter your vehicle’s year, make, model, or VIN, and watch it appear in 3D.

AI Powered Answers

Get fast, data-backed solutions to your car questions. Instead of waiting hours or weeks or a forum reply.

AI Powered Answers

Get fast, data-backed solutions to your car questions. Instead of waiting hours or weeks or a forum reply.

AI Powered Answers

Get fast, data-backed solutions to your car questions. Instead of waiting hours or weeks or a forum reply.

AI Powered Answers

Get fast, data-backed solutions to your car questions. Instead of waiting hours or weeks or a forum reply.

How It Works

Your Build, Simplified.

Start free, explore the tools, and unlock full AI power when you’re ready.

1

Explore Without Limits

Browse parts, check pricing, and get a feel for how ModStock.ai works, no account required. See how AI fitment and verified suppliers simplify even basic sourcing.

2

Create Your Account

Sign up free to access AI chat, save builds, and connect with the community. Ask a limited number of questions to see how ModStock’s AI helps identify issues, recommend parts, and guide your next steps with precision.

3

Subscribe & Finish Your Project

Upgrade to unlock advanced tools—like unlimited AI queries, detailed 3D modeling, and service coordination. Order the right parts, schedule installs, and track your entire build in one hub.

Pricing

Choose the right plan for your project.

Monthly

Yearly

Basic User Plan

Essential tools to get started

$9

Monthly

Join Waitlist

Browse parts and suppliers

Access limited AI chat (test-drive mode)

Save and manage one vehicle project

Basic community access (read-only)

Premium Club Plan

Extra perks for true enthusiasts

$19

Monthly

Join Waitlist

Unlimited AI chat access

Manage up to 3 vehicle projects

Join and participate in club events

Member-only deals from verified suppliers

Early access to 3D model tools

Pro Group Plan

Build together. Go further.

$99

Monthly

Join Waitlist

All Premium Club features

Host your own club or community page

Group purchasing & supplier pledges

Event calendar + notifications

Dedicated ModStock support

Monthly

Yearly

Basic User Plan

Essential tools to get started

$9

Monthly

Join Waitlist

Browse parts and suppliers

Access limited AI chat (test-drive mode)

Save and manage one vehicle project

Basic community access (read-only)

Premium Club Plan

Extra perks for true enthusiasts

$19

Monthly

Join Waitlist

Unlimited AI chat access

Manage up to 3 vehicle projects

Join and participate in club events

Member-only deals from verified suppliers

Early access to 3D model tools

Pro Group Plan

Build together. Go further.

$99

Monthly

Join Waitlist

All Premium Club features

Host your own club or community page

Group purchasing & supplier pledges

Event calendar + notifications

Dedicated ModStock support

Monthly

Yearly

Basic User Plan

Essential tools to get started

$9

Monthly

Join Waitlist

Browse parts and suppliers

Access limited AI chat (test-drive mode)

Save and manage one vehicle project

Basic community access (read-only)

Premium Club Plan

Extra perks for true enthusiasts

$19

Monthly

Join Waitlist

Unlimited AI chat access

Manage up to 3 vehicle projects

Join and participate in club events

Member-only deals from verified suppliers

Early access to 3D model tools

Pro Group Plan

Build together. Go further.

$99

Monthly

Join Waitlist

All Premium Club features

Host your own club or community page

Group purchasing & supplier pledges

Event calendar + notifications

Dedicated ModStock support

Gear Up Your Crew for Early Access.

Early access for automotive clubs that want shared AI tools, group orders, and event management before public launch.

Join Waitlist

FAQs

Have a questions?

Find quick and clear answers to the most common questions about ModStock.

How do mechanics, towing providers, or detailers partner with ModStock?

What benefits do car clubs receive from joining the Car Club Registry?

How does ModStock protect user and supplier data?

What if a part doesn’t fit—how are returns handled?

How does ModStock ensure AI fitment predictions are accurate, especially for rare or pre-OBD-II vehicles?

What makes ModStock different from eBay Motors or Amazon?

What kind of customer support is available, and how responsive is it?

Are there fees for users to access the platform or its features?

What incentives do suppliers and service partners receive for participating?

How do mechanics, towing providers, or detailers partner with ModStock?

What benefits do car clubs receive from joining the Car Club Registry?

How does ModStock protect user and supplier data?

What if a part doesn’t fit—how are returns handled?

How does ModStock ensure AI fitment predictions are accurate, especially for rare or pre-OBD-II vehicles?

What makes ModStock different from eBay Motors or Amazon?

What kind of customer support is available, and how responsive is it?

Are there fees for users to access the platform or its features?

What incentives do suppliers and service partners receive for participating?

How do mechanics, towing providers, or detailers partner with ModStock?

What benefits do car clubs receive from joining the Car Club Registry?

How does ModStock protect user and supplier data?

What if a part doesn’t fit—how are returns handled?

How does ModStock ensure AI fitment predictions are accurate, especially for rare or pre-OBD-II vehicles?

What makes ModStock different from eBay Motors or Amazon?

What kind of customer support is available, and how responsive is it?

Are there fees for users to access the platform or its features?

What incentives do suppliers and service partners receive for participating?

Join the waitlist or send an inquiry.

Have questions about fitment, membership plans, or partnerships? Our team is here to help you move your build forward.

Ready to transform your build?

Start your journey with ModStock.ai, the platform that eliminates fitment guesswork, connects you with trusted suppliers, and brings every project to life with confidence.

Join Waitlist

Ready to transform your build?

Start your journey with ModStock.ai, the platform that eliminates fitment guesswork, connects you with trusted suppliers, and brings every project to life with confidence.

Join Waitlist

Ready to transform your build?

Start your journey with ModStock.ai, the platform that eliminates fitment guesswork, connects you with trusted suppliers, and brings every project to life with confidence.

Join Waitlist