Every booking, captured. Every customer, confirmed.
From inquiry to confirmation in seconds — automatically.
↗ Live at drivecostasol.com · Marbella, SpainThe problem
Sound familiar?
Inquiries lost in WhatsApp
A customer messages at midnight asking about your rental. By morning they've booked with your competitor. You never saw the message.
You can't delegate because there's no system
Everything lives in your head. Your staff can't confirm a booking without calling you. You're the bottleneck in your own business.
Your rentals command premium rates. Your booking process doesn't.
Your customers expect a professional response. They deserve a confirmation within seconds — not a WhatsApp voice note the next morning.
3 weeks to build what should take 3 days
Every rental client needs the same things: booking flow, admin panel, email notifications, availability calendar. You've built it before. You'll build it again.
No unified view across your locations
Your Marbella inventory is in one spreadsheet. Ibiza in another. Someone always has the wrong information. A booking gets confirmed twice.
Every bike and board rented by memory
You track which kayak is out by texting your team. Equipment comes back and you don't know if it's available until you physically check.
Your gear is out. You just don't know where.
Cameras, generators, lighting rigs — all rented on a handshake. One double-booking costs you a client relationship and a deposit dispute.
RentalOS solves all of this.
What you get
Everything to launch in a day
Ready to launch?
14-day free trial. No credit card required.
See it live
Built for a real business
A rental business in Marbella is running this exact codebase in production. Same admin panel. Same booking flow. Your branding.
Built for
Who it's for
1–5 items
Solo operators
You manage everything yourself. RentalOS handles the admin so you can focus on your customers. Inquiries captured 24/7, confirmations sent automatically.
Start free trial →5–20 items
Growing businesses
Your team needs a system they can follow without calling you. Every booking, every item, every customer — visible from any device.
Start free trial →Premium inventory
Premium rental operators
Your inventory represents your brand. Automatic confirmations, professional document handling — a booking experience that earns the trust your operation deserves.
Talk to us →Bikes & boards
Sports & activity rental
Bikes, kayaks, surfboards, skis. High-turnover rentals where every hour matters. Never lose track of what's out and when it's back.
Start free trial →Tools & gear
Equipment rental
Cameras, generators, construction tools, audio gear. High-value equipment that needs clear records, signed agreements, and zero double-bookings.
Start free trial →Villas & stays
Holiday & accommodation
Villas, apartments, holiday homes. Automated inquiry handling and professional confirmations — so every guest arrives expecting exactly what you promised.
Start free trial →Build for clients
Freelancers & agencies
Stop rebuilding the same rental system for every client. Buy once, deploy many times. Full source code, commercial licence, documented and production-ready.
Buy template — €499Multiple sites
Multi-location operators
One admin panel. All your locations. Every booking visible from anywhere. Set up once, manage everything centrally.
Contact us →Built for a real business
Before RentalOS, we managed everything on WhatsApp and a shared 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 — running since 2026
0
Double bookings since launch
48h
Time to go live
100%
Inquiries captured
Any category
What you can rent out
RentalOS doesn't care what you rent. It cares that every customer gets confirmed.
Source code
Or build it yourself.
Full source code. Deploy on your own servers. Use it for your business — or build for your clients.
Buy the template — €499 →Pricing
Choose how you get started
Starter
Up to 5 items
- Unlimited bookings
- Email notifications
- Admin panel
- 14-day free trial
Growth
Up to 20 items
- Everything in Starter
- Transfer/delivery
- Weekly report email
- Referral program
Pro
Unlimited items
- Everything in Growth
- Custom domain included
- Custom design & branding
- Priority support
“Before RentalOS, I was managing every booking on Messenger. 90% of our inquiries now confirm automatically — that's 6–8 hours saved every week.”
Questions
FAQ
What tech do I need?
Node.js 18+, a free Supabase account, and a free Vercel account. All free tiers are sufficient to launch and handle early traffic.
Can I resell to clients?
Yes. The commercial licence covers a single deployment. For agency/multi-client use, see the template listing for full terms.
Is there a demo?
Yes. Visit /demo to explore a live car rental business running on this exact codebase.
How long to deploy?
About 1–2 hours with the included setup guide. Fork the repo, connect Supabase and Vercel, set environment variables, push. Done.
Do you offer support?
Yes — see the Done-for-you plan. We deploy and configure everything for you, with 30 days of included support after handoff.