Custom software
Software built to your specifications, with a fixed price agreed before work starts.
Programs for managing customers, contracts, scheduling, invoicing, inventory and online booking. You see the screens before anything is built. The finished program is licensed to you once, with no subscription.


Sample screens with placeholder data. Your screens are designed around your business before anything is built.
Process
Consultation
A free call of about 30 minutes to go over the problem, the people who will use the program and what it needs to do.
Screens and quote
Screen designs and a fixed quote within a week. Work starts only after you approve both.
Build and install
The program is built, installed on your computers or server, and your staff are trained on it.
Example
A self-storage facility kept its rentals, contracts and payments across spreadsheets and separate apps. It now runs from one program: customers book and sign online, invoices are marked paid automatically, and monthly reports are ready for the bookkeeper.
Included
| Price | Fixed, agreed before work starts |
|---|---|
| Platforms | Windows desktop, web, mobile |
| Installation | Included |
| Training | Included |
| License | One time, no expiration |
| Support | Optional support plans |
Custom software vs. subscription software
Subscription software charges every month or year and works the way its vendor decided. Custom software is built around your business and licensed to you once.
| Subscription software | Custom software from Viper Systems | |
|---|---|---|
| How you pay | Monthly or yearly subscription | One-time license |
| Fit to your business | You adapt to the vendor's screens and reports | Built around how you work |
| Where your data is kept | The vendor's servers | Your own computer or server |
| Upgrades | The vendor decides when | No forced upgrades |
| If you stop paying | Access ends or becomes read-only | It keeps working. The license never expires. |
| Support | Vendor phone and chat | Direct support from the developer |
