Vehicle Provenance Registry

Your build
has a story.
Now it has proof.

Log every mod. Track every dollar. Share a verified build page in 60 seconds.

Start for free → See how it works
Free · No credit card · No subscription
modstack.app/build/wrx-ranveer-2022
ModStack
ModStack
2022 Subaru WRX
Mods
12
Installed
8
Invested
$6,840
Injen cold air intake
Engine
installed
BC Racing coilovers
Suspension
in progress
Invidia Q300 exhaust
Exhaust
planned
Track every mod Log every dollar Share your build AI Mechanic PDF export Cloud sync Free forever Track every mod Log every dollar Share your build AI Mechanic PDF export Cloud sync Free forever
60s
From signup to a live, shareable build page
$0
Free to use. No subscription ever required.
∞
Unlimited builds and mods for every car you own
Real
Documented receipts replace unverified claims
How it works
Zero to shareable
in 60 seconds.
01
Create account
Email and password. Free. No card.
~15 sec
02
Add your car
Year, make, model. Set a budget.
~10 sec
03
Log your mods
Name, cost, status. Planned or installed.
~10 sec each
04
Share your proof
Tap Share. Get a clean link. Post anywhere.
~5 sec
Features
Built for builders.
Not accountants.
📋
Build Records
Every mod logged — name, cost, category, status. Full history, always yours.
💰
Budget Tracking
Set a budget. Watch spend in real time. Know exactly what's left.
🔗
Public Build Pages
One tap. A clean shareable URL with full social preview cards.
🤖
AI Mechanic
Expert parts advice tailored to your exact build and budget.
📄
PDF Export
Official build spec in one tap. Hand it to your mechanic or buyer.
☁️
Cloud Sync
Log a mod at the shop. Pull up your build anywhere, any device.
The Founder
Built by a car person,
for car people.

I'm Ranveer — I'm 18 years old and I've been modifying cars since I could drive. I built ModStack because I got tired of losing track of everything I'd done to my 2004 Honda CRV. Receipts in notes apps, costs in my head, mod list nowhere. When someone asked what I had done, I couldn't properly answer.

ModStack is the tool I wished existed. A permanent, shareable record of every modification — so your build has proof, not just a story. We're pre-revenue, growing by word of mouth, and every feature is free while we build the community.

🔧
Authenticity first
Built by someone who actually wrenches. Every feature comes from a real problem.
🔒
Zero fluff
No inflated claims. No mystery builds. Just documented receipts and verified data.
🌱
Community owned
Free while we grow. Built for builders, not investors.
R
Ranveer Jayaswal
Founder & Builder
18 years old. Car enthusiast. Built ModStack to document my 2004 Honda CRV and ended up building a platform for the whole community.
✉️ official@modstackapp.com
📞 +1 (925) 301-3247
🌐 modstackapp.com
About ModStack
The verification standard
for modified cars.

ModStack is a vehicle provenance registry built for the modified car community. We give every builder a permanent, shareable digital record of their build — replacing verbal claims with documented proof.

Think of it as CarFax, but for modifications. Instead of ownership history, we track the modification history — every part installed, every dollar spent, every upgrade planned.

🏁
Founded 2025
Built in the San Francisco Bay Area by a teenager who modifies cars.
🎯
Mission
Make every modified car's history transparent, verifiable, and shareable.
🚗
For builders
Every platform, every make, every mod. If you build cars, ModStack is for you.
💬
Community first
Free during our growth phase. We grow when our users grow.
Email
official@modstackapp.com
For questions, partnerships, and feedback
Phone
+1 (925) 301-3247
Available Mon–Fri, 9am–6pm PT
Headquarters
San Francisco Bay Area
California, United States
Your build.
On record.
Free to start. No credit card. Shareable in 60 seconds.
Start your build record →