RentalOS

The booking that arrived at 11pm. The one you missed because you had no system.

RentalOS sends the confirmation automatically. Your customer knows they're confirmed. You wake up to a done deal.

Get the system — €299See it live

Built for CostaSol Car Rent, Marbella·drivecostasol.com

Bookings
3 new inquiries
Mercedes E-ClassJul 12–14
Confirmed
Jeep WranglerJul 15–18
Inquiry
BMW 5 SeriesJul 10–12
Picked up
⚠Insurance expiring — Mercedes E-Class12 days

Sound familiar?

Inquiries getting lost in WhatsApp

A customer messages at midnight. By morning they've booked with someone else. You never even saw it.

Double bookings you find out about at pickup

Two customers, one car, same day. The conversation that follows is one nobody wants to have.

Chasing documents and deposits manually

Every booking is a new thread of messages, reminders, and follow-ups that eats hours you don't have.

Your customers booked their flight on their phone. They chose their hotel on their phone at midnight.

They'll try to book your vehicle the same way. The only question is whether you're ready when they do.

RentalOS handles it

From inquiry to pickup — automated.

01

Every inquiry captured

Customers submit through your site or a WhatsApp link. You get an instant email alert. They get an immediate confirmation. Nothing is lost.

02

Availability checked automatically

The system prevents double bookings before they happen. Confirm with one click — the calendar updates instantly.

03

Documents and deposits tracked

Licence photos, deposit amounts, payment status — all in one place per booking. Every handover is clean.

See it working right now.

Not a slideshow. Not a video. A live system with real data you can click through — no signup required.

Open live demo

Resets daily. Data is sample only.

Everything you need

One system. No missing pieces.

Customer-facing booking site

Your own branded URL. Customers browse your fleet and submit inquiries directly.

Admin panel

Manage every booking from inquiry to return. Confirm, update status, add notes — from your phone.

Automatic email confirmations

Every inquiry and confirmation triggers a branded email. You look professional before you've said a word.

Fleet management

Add vehicles, set prices, upload photos, toggle availability. Your fleet, always up to date.

Transfer and delivery

Customers can request hotel delivery. You set the fee and confirm — tracked separately from the booking.

Document capture

Upload licence photos and ID at pickup directly in the admin. Everything stored per booking.

Customer history

See every previous booking for a returning customer. Remember who they are before they arrive.

Weekly summary email

Every Monday: inquiries, confirmed bookings, upcoming pickups, revenue. Your business at a glance without logging in.

SEO optimised

Sitemap, schema markup, canonical URLs, Open Graph tags. Your fleet shows up in Google searches.

Mobile-first admin

Designed for phone use. Confirm a booking while standing at the vehicle. No laptop required.

Secure and rate-limited

Authentication, RLS policies, rate limiting on all public endpoints. No exposed data.

Full source code (Commercial licence)

Own the code. Deploy it yourself or hand it to a developer. No vendor lock-in. Ever.

What most rental businesses use

The hidden cost of “good enough”

WhatsApp + phone

  • No 24/7 coverage — you miss what arrives overnight
  • No shared calendar — double bookings happen
  • Customer history starts fresh every booking
  • Every confirmation is a manual message you write

Spreadsheet + email

  • No customer-facing booking page
  • Availability is whatever you last updated it to
  • Confirmation emails you write one by one
  • Breaks the moment you're away from your desk

Generic booking platform

  • Built for every business — optimised for none
  • Your data on their servers, not yours
  • Monthly fee whether you use it or not
  • No vehicle document management

RentalOS

  • Customer-facing booking site, your brand
  • Automatic confirmations, 24/7
  • Your data, your servers, your control
  • Built specifically for rental businesses
  • Done-for-you option available
  • Own it for €299 or subscribe from €49/month

Most people who buy RentalOS weren't looking for new software. They were tired of the workaround they had.

What if I get stuck?

Every template purchase includes 30 days of personal email support. Not a chatbot. Not a help centre.

A person who wrote every line of this code will reply personally within 24 hours. We have never had a customer who couldn't get live.

We were managing everything through WhatsApp and a spreadsheet. Now every inquiry gets a confirmation email within seconds. Our customers think we're a much bigger operation than we are.

CostaSol Car Rent

Marbella, Spain

Visit drivecostasol.com

48h

Average setup time

0

Double bookings since launch

100%

Inquiries captured automatically

What happens if RentalOS disappears tomorrow?

Nothing. Because you own the code.

Template: complete Next.js codebase on your GitHub.
Your data: in your Supabase database. We never touch it.
Your domain: pointed to your Vercel deployment.
Your customers: in your email system.

If we disappear tonight, your system runs tomorrow. And the day after. And forever.

We built it this way deliberately. We would want the same thing if we were the customer.

Simple pricing

Own it outright or subscribe monthly.

Template

One-time
€299

Pay once. Own forever.

  • Full source code (Next.js)
  • Deploy to any host
  • RentalOS Commercial Licence
  • Single deployment included
  • Complete documentation
  • 30-day email support
See licence terms →Buy on Gumroad

Instant download · Full source code · Commercial licence

Starter

Most popular
€49/month

1–3 vehicles. Up to 30 bookings/month.

  • Everything hosted for you
  • Admin panel included
  • Email notifications
  • Updates included
  • 14-day free trial
Start free trial

14 days free · No credit card required

Done for you

Service
€499

One-time. Ready in 48 hours.

  • We deploy everything
  • Your domain configured
  • Admin account created
  • Your vehicles added
  • 30-day support included
Get started

We handle everything · Ready in 48 hours

All plans include the complete system. No hidden fees. Starter plan: cancel anytime from your admin panel.

Questions

Before you buy.

Do I need technical knowledge to set it up?+
For the template: basic comfort with terminal commands and following documentation. For the done-for-you plan: none. We handle everything.
Can I use this for yacht or villa rentals, not just cars?+
Yes. The system works for any rental business. The fleet management, booking flow, and admin panel are vehicle-agnostic.
Can I resell this to my clients?+
Yes. The template includes a Commercial licence. You can deploy it for clients, charge for setup, and keep 100% of what you earn.
What happens after I buy the template?+
You receive a ZIP file with the complete codebase and full documentation. Deployment takes 1–2 hours following the guide.
Is there ongoing support?+
Template purchases include 30-day email support. Subscription plans include ongoing support as long as you subscribe.
What if I set it up and don't use it?+
The 14-day trial is exactly for this. Set it up, run a test booking, decide if it fits. You pay nothing until day 15. If you don't upgrade, you walk away with nothing owed and nothing lost.
How is this different from generic booking software?+
Generic booking platforms are built for any product that can be rented — furniture, equipment, cars, rooms. RentalOS is built specifically for vehicle, yacht, villa, and motorcycle rental: the booking flow, confirmation emails, and admin panel are designed around how these businesses actually operate. You use it as-is.
Can I see the code before buying?+
The demo at /demo runs the exact codebase. For template buyers who want to review the source before purchase, contact us — we'll provide read-only GitHub access within 24 hours.
What if I need a feature that isn't included?+
Template buyers have the full source code — add whatever you need. SaaS subscribers: email us. We're a small team and we build what customers actually use. If multiple people ask for the same thing, it ships.
Is my customer data private and secure?+
Your customer data lives in your own Supabase database project. We do not have access to it. You are the data controller under GDPR — not us. The system uses Row Level Security on every table, rate limiting on every public endpoint, and no credentials are ever stored in client-side code.

Ready to run your rentals properly?

Get the system — €299See it live first

Questions? hello@rentaios.com