You can buy ITigris Optima as a “Software as a Service” solution.

You are free from the initial payments for Optima. We just charge a monthly subscription for our services, which include access to the full Optima functionality together with all future updates and technical support.
Pricing is based on the amount of stores using Optima. You can use Optima unlimited workplaces in the stores, as well as free of charge at the offices and warehouses.

The monthly subscription is only 125 USD / Month for the first store and 75 USD / Month for each additional.

Monthly subscription includes:

The software license
The server infrastructure
The server software
Server administration
Real-time backups
Technical support
Users training and education
Regular Optima updates