Startups & Founders

Launch your venture, we handle the rest

Auto-categorized accounting, 2026-ready e-invoicing, pre-filled VAT & corporate tax declarations. You focus on your product, we handle compliance.

Start free (no card)

30-day trial - 0 credit card

Your daily challenges

Launch your startup with the same tools as a 50-person SME

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I know nothing about accounting and can't afford a firm

VAT, corporate tax, expenses, payroll, FEC, declarations... You're launching your product, not an accounting firm.

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My invoices are late, so are payments

You invoice in Word, send by email, follow up via sticky notes. DSO exceeds 60 days and you see your cash burn.

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The 2026 e-invoicing reform stresses me out

From September 2026, all French SMEs must issue electronic invoices in Factur-X / UBL / CII format via a PA. You have neither the time nor the budget.

How CassKai helps you

✓ AI-piloted auto accounting

Auto-categorization of bank transactions, pre-filled journals, detected anomalies. You validate in 10 min/month instead of pulling your hair for 3h.

✓ 2026-ready e-invoicing

Factur-X, UBL 2.1, CII natively supported. Import your PA credentials (Iopole, Tenor, Cegedim) and issue without changing your invoicing flow.

✓ Treasury connected to your bank in 30 seconds

Bridge / Open Banking: Qonto, Shine, Boursorama, Societe Generale, BNP. Live cash view, low-balance alerts, 13-week forecast.

✓ Integrated AI assistant to explain accounting to you

GPT-4o trained on PCG/SYSCOHADA rules. Ask "explain this payroll charge" or "how do I post this refund", answer in 5 seconds.

Most relevant modules for you

Accounting

See the module →

Invoicing

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Bank & Treasury

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AI Assistant

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Frequently Asked Questions

Am I really exempt from a credit card during the trial?

Yes. CassKai offers a full 30-day free trial with no credit card required at sign-up. At the end of the trial, you can either switch to a paid plan or lose access (no surprise automatic billing).

I'm a sole proprietor, is it compatible?

Yes. CassKai handles micro-BIC and micro-BNC regimes with automatic deduction, quarterly or monthly social security declaration, and simplified migration if you exceed thresholds.

Can my chartered accountant access my data?

Yes. You can invite your chartered accountant as an "Auditor" or "Reviewer" user at no additional cost. They will have read/write access (per role) to your journals, balances, statements and FEC, and can even close your fiscal year on your behalf. No additional licensing required.

Resources to dig deeper

How to Choose Your E-Invoicing Software in 2026

Sept. 2026 is approaching: 8 essential criteria for evaluating reform-compliant software, pitfalls to avoid, and our free comparison grid.

E-Invoicing in France: The Complete Guide to the 2026 Reform

PPF, PDP, Factur-X, UBL, CII, e-reporting: decode the reform transforming B2B invoicing in France. Timeline, formats, obligations and step-by-step preparation.

Reduce DSO: How to Get Paid Faster and Secure Your Cash Flow

8 actionable strategies to reduce your customer payment delays, improve your working capital and free up cash. Practical guide for SMBs and freelancers.

Ready to simplify your accounting?

Free 30-day trial

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