Companies, invoices, documents, clients and cashflow — in one calm, minimal workspace. Set up in minutes. Stay on top in five a day.
Free forever plan · 14-day free trial · No credit card · GDPR-first
From scattered tools to one source of truth
Not features for the sake of it — outcomes you feel every week.
Branded invoices, sent by email, marked paid, recurring — with VAT and discounts done right, in EUR, USD, GBP, AED, SAR, QAR and more.
Contracts, IDs and compliance files in private, searchable storage — the right file is always one search away.
Receivable, payable, overdue and cashflow — across every company you run, in a glance.
Most tools stop when the invoice is sent. OPSKAP runs the whole operation.
A typical invoicing tool
OPSKAP OS
Four steps from chaos to control.
Add one or more legal entities with registration, VAT and bank details.
Add clients and drop contracts and compliance files into private storage.
Generate a branded PDF, email it, mark it paid, set it recurring.
Income, expenses, who owes you and what’s overdue — in one glance.
No ERP monster. Just what runs a business.
Several legal entities, separate data, one overview.
Outgoing & incoming, PDF, email, recurring, VAT after discount.
Drag & drop, tags, search, private signed-URL storage.
Lightweight CRM and team records, linked to companies.
Income, expenses, overdue and bank CSV import.
Verification, data export and account deletion built in.
Professional invoices, your documents and clean cashflow — without the bloat. Free forever, ready to grow into multiple companies.
Start free. Upgrade when you grow. Every new account gets 14 days of full Team features.
Full comparison on the pricing page. Downgrades never delete your data.
Short answers. Longer ones on the FAQ page.
OPSKAP OS is a small business operating system — invoicing software, document management, a lightweight client base and cashflow tracking in one minimal workspace. Built for freelancers, consultants, agencies and founders running one or several companies.
Yes. The Free plan includes one company and 5 invoices per month, forever. Every new account also gets a 14-day trial with full Team features — no credit card required.
Yes. Multi-company management is the core of OPSKAP OS: Pro Solo covers 2 companies, Team covers 5, Unlimited has no limits — separate legal entities, documents, clients and finances with one dashboard on top. Ideal for e-Residency founders and agency owners.
No — and it isn’t meant to. OPSKAP OS gives you operational cashflow visibility: who owes you, what you owe, what’s overdue. Your accountant keeps doing the books; you finally see the whole picture daily.
Yes. Data is stored in the EU with encryption at rest and in transit, row-level security and private document storage. You can export or delete your data at any time.
Set up your first company and send an invoice in under five minutes.
Get started free