SME management · Paraguay
Business management software for SMEs, with SIFEN e-invoicing
Marvin is Hadros' business management software for small and medium-sized companies in Paraguay: sales, SIFEN e-invoicing, inventory, purchasing, finance, collections and HR in one application, across companies and branches, in guaraníes and dollars, with payment reminders over WhatsApp.
Everything Marvin organises
SIFEN e-invoicing
Each invoice is signed when issued and sent to SIFEN in batches, with CDC, QR code and KuDE.
Multi-currency
Prices, sales and receipts in guaraníes and in dollars, with the day's exchange rates.
Group › Company › Branch
Several companies and branches under one login; every screen knows where it stands.
WhatsApp collections
Instalments with their status and reminders before and after the due date through WhatsApp Business.
Point of sale
Checkout with barcode scanner, keyboard shortcuts, payments and a customer-facing display.
HR and accounting
Payroll and IPS social security, MTESS labour reports, VAT ledger and financial statements.
A complete core plus modules you add
Marvin covers customers, products and inventory, sales and invoicing, purchasing and imports, finance and treasury, and administration. Add-on modules are switched on company by company, only when hired.
- Point of sale with dual display
- Subscriptions and instalments with a contract builder
- Quotes, services and work orders
- Accounting and management reports
- Fleet and vehicle management
- Conditional sales (try-on and consignment)
Made for the daily life of an SME
A workspace with shortcuts, step-by-step guides inside each screen, Spanish and English, and a notification centre for overdue and upcoming instalments. What used to live in side spreadsheets ends up in one place.
How we roll it out
- 01
Review
We go through your companies, branches, currencies and how you invoice today.
- 02
Setup
We switch on the modules you need and load your data.
- 03
Training
We support the team with the guides built into each screen.
- 04
Continuous improvement
We add modules or custom changes as you grow.
See it working
On the home page you can see Marvin in action with demo data.
Frequently asked questions
Does Marvin issue electronic invoices valid for Paraguay's tax authority?
Marvin works with SIFEN: it signs each document when issued, sends it in batches and checks the result. Production use is set up with your company's certificate and CSC.
Does it work for a company with several branches?
Yes. It organises groups, companies and branches, and every operation is recorded in the right branch.
Can I work in guaraníes and dollars?
Yes. Prices, sales and receipts support several currencies with their exchange rate.
How do the WhatsApp collection reminders work?
Each instalment has a status and Marvin sends reminders before and after the due date. It requires WhatsApp Business set up with Meta.
Do I pay for modules I don't use?
No. The core covers daily operations and add-on modules are enabled per company only when hired.
Want to see Marvin with your data?
Let's set up a demo for your company.
WhatsApp +595 973 662 905or by email contact@hadros.solutions






