AI chat for tax advisors

Use Claude.
Confidentiality preserved.

You want to use Claude for client data, tax law and DATEV preparation — but professional confidentiality under §57 StBerG rules out US cloud. ClapNClaw gives your tax firm Claude on its own server in Frankfurt. No CLOUD Act. No data leak.

DATEV OAuth · 100% EU §57 StBerG · §203 StGB compliant Hetzner Frankfurt AVV Art. 28 GDPR
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No credit card · Setup in 3 minutes · Cancel anytime

DATEV
OAuth · EU
100%
EU data
3 min
Setup
14 days
Free

Use cases

What you can ask Claude in
your tax firm every day.

The same AI as in ChatGPT — but on your own server. Client data and balance sheets stay in Frankfurt.

Tax audit

Analyze these accounting records for typical tax-audit risks and create a prioritized checklist for the client meeting.

Annual financial statements

Draft a commentary on the 2025 annual financial statements for our client based on this P&L and balance sheet. Focus: material changes from the prior year.

Tax return

Review this income tax return for possible optimization opportunities and missing receipts. Please follow the current EStG (German Income Tax Act).

Client queries

Explain to my client in plain terms why entertainment expenses are only 70% deductible and which receipts they need.

Skills for your tax firm

Specialized in tax tasks.

Pre-configured skills that tune Claude to your tax work right away — including DATEV integration with no prompt engineering.

DATEV receipt extraction Booking-entry suggestions DATEV OAuth export Invoice classification Deadline tracker Annual-statement commentary Client communication EStG research

DATEV integration

From receipt to booking — in seconds.

DATEV integration via OAuth. Claude extracts, classifies and proposes the booking entry. You review and confirm.

DATEV OAuth · Nuremberg · 100% EU · No third-party server

01

Upload receipt

PDF, image or email attachment via drag & drop — or automatic import via the DATEV integration.

02

Claude extracts

Amount, VAT rate, supplier and date — no template, no manual mapping. Even with poorly scanned receipts.

03

Suggest booking entry

The AI proposes the account and contra account. You review with one click. No typo, no forgotten account.

04

Straight into DATEV

One click straight into DATEV Kanzlei-Rechnungswesen — via OAuth, entirely within the EU.

Example chat

This is what your private
AI chat looks like.

ClapNClaw — Your tax firm
🇩🇪 Frankfurt · private
Client asks: can they fully deduct last week's business dinner with customers? Invoice €380, 4 people, restaurant in Frankfurt.
You · just now
No — only 70% deductible (§4 (5) no. 2 EStG). Of the €380, €266 is deductible. Conditions: 1) entertainment receipt listing all participants' names, 2) the business occasion noted, 3) the taxpayer's signature…
Claude · eu-central-1 · private
🔒 Private — never used for training — never leaves Frankfurt

Data protection & professional law

Why tax advisors
trust ClapNClaw.

§57 StBerG · §203 StGB — Tax professional confidentiality

Client data runs exclusively on your server in Frankfurt. No US company has access. Tax professional confidentiality remains fully preserved.

Server in Frankfurt — EU data residency

Hetzner Frankfurt. Claude runs via AWS Bedrock eu-central-1 — Anthropic stores no data. 100% EU data residency. No CLOUD Act.

GDPR AVV under Art. 28 — from day one

Data processing agreement included. DATEV-compatible. Setup in 3 minutes, no IT effort. Ready to use immediately.

No training on client data

Your client data is never used for AI training. 0 bytes leave your server. Balance sheets and tax returns belong to you.

Frequently asked questions

Common questions from
the tax firm.

Can tax advisors use ChatGPT with client data?

Not without more: tax advisors are bound by professional confidentiality (§203 StGB). Client data sent to ChatGPT or Claude.ai (web) ends up on US servers without a suitable agreement in place. ClapNClaw runs Claude in your own container in Frankfurt — with an AVV under Art. 28 GDPR and a §203 supplementary agreement.

How does the DATEV integration work?

Via OAuth directly with your DATEV account — with no detour through third-party servers. Receipts are extracted, classified and proposed as a booking entry. DATEV (Nuremberg) and ClapNClaw (Frankfurt) process everything within the EU.

What does ClapNClaw cost for tax firms?

Compliance tier: €59 per user per month (€50 with annual billing) including DATEV integration, receipt extraction and the §203 supplementary agreement. 14 days free, no credit card.

Where is the data processed?

Exclusively within the EU: client data on Hetzner Frankfurt, AI inference via AWS Bedrock eu-central-1 (Frankfurt). Anthropic stores no data via Bedrock. No CLOUD Act access.

Claude for your tax firm.
Private. Frankfurt. Now.

14 days free. No credit card. Setup in 3 minutes.

Start free now ↗

Cancel anytime · Data in Frankfurt · §57 StBerG compliant · DATEV OAuth