Find firm knowledge. Approve client letters.

AI for your tax firm, with a DPA and § 203 StGB. Look up firm knowledge with the exact source, have client letters drafted and hand recurring tasks to agents. You approve anything before it leaves the firm.

Free for one user, no credit card.

Rather talk first? Arrange a call or phone +49 3744 365 2202

Client WolfExample
Reply to Mr WolfWaiting for approval

  • Look up firm knowledge

    Answers from handbook, fact sheets and assessments, with document and page.

  • Draft client letters

    Replies and reminders are written from your documents. You read and send.

  • Hand over tasks

    Agents compare assessments and request missing documents, after your approval.

  • Try it free

    With firm knowledge that holds no client data. For clients: Pro with DPA and § 203 StGB.

Check assessments against the return.

Agents compare new assessments with the return and note deadlines. Text recognition reads scanned assessments too.

  • Differences with document and page
  • Entry for the deadline register prepared
  • The tax review stays with you
Income tax 2025, client WolfExample
Prepare a draft objectionWaiting for approval

An agent requests missing documents.

Every Monday an agent checks what is still missing and writes a draft reminder for each client. Every step that goes outside waits for your approval.

  • Starts on a new email, Teams message or schedule
  • Works in Outlook, Teams, SharePoint and Excel
  • Test run in simulation mode, with no consequences
Monday, 2025 returnsExample
Send 7 remindersWaiting for approval

Client letters from your own documents.

Replies, reminders and draft objections are written from fact sheets, circulars and earlier letters. You read and send.

  • Draft in Word, ready to edit
  • Every statement with a source from your documents
  • Nothing is sent before you approve it
Schreiben_Wolf.docxExample
Letter to Mr WolfWaiting for approval

DPA and § 203 StGB, signed online.

  • No paperwork

    From Pro, you sign the DPA and the undertaking under § 203 StGB online. For your review under § 62a StBerG, you receive our security concept.

  • Each client kept separate

    A client can have its own workspace. Anyone without access gets none of its content in any answer.

  • Data in Germany

    On Demand runs in data centres in Germany. With Private Spark, the AI sits in your own office.

  • No training on client data

    Your documents do not train any model. External models do not store your inputs.

All about security

What § 203 StGB and § 62a StBerG require.

Before a service provider sees client data, the practice has to put a few things in place. This is how souveraen.ai covers them.

What the law requiresHow it is covered
§ 203 StGB

What the law requiresService providers may help with client secrets if the practice has bound them to confidentiality.

How it is coveredYou sign the undertaking under § 203 StGB online from Pro, before the first client document goes in.

§ 62a StBerG

What the law requiresThe practice selects the provider with care and signs a contract in text form. It covers confidentiality and whether other people may help.

How it is coveredFor your selection, you get our security concept and the technical and organisational measures.

§ 62a (4) StBerG

What the law requiresIf a provider is based abroad, protection of secrets there must be comparable to Germany.

How it is coveredOn Demand runs in data centres in Germany. External models from the catalogue run in the EU and do not store your inputs.

Art. 28 GDPR

What the law requiresProcessing on the practice's behalf needs a data processing agreement.

How it is coveredYou sign the DPA online from Pro.

This overview is not legal advice. The wording of the law and your own review are what count.

Or keep the AI in your practice.

With Private Spark, souveraen.ai runs on an NVIDIA DGX Spark on your premises. Documents and models stay in the practice.

See Private Spark
On Demand with ProPrivate Spark
Where your data livesData centres in GermanyNVIDIA DGX Spark in your practice
Price€24.90 per user per month€2,790 per month, DGX Spark included
ModelsBilled in AI creditsLocal models, no token costs
ContractDPA and § 203 StGB signed onlineSigned online, 24-month term

All prices net, excluding VAT.

Questions your team can ask.

Choose a role and click a question.

Client serviceExample

Which documents does Mr Wolf need for the home office?

Searching your sources

A floor plan with the floor area and proof of rent and service charges. 1

1Source: Merkblatt_Arbeitszimmer.pdf, p. 1

Gesetze und Gerichtsentscheidungen kommen aus der optionalen Rechtsdatenbank und bleiben von Ihren Unterlagen getrennt.

Start with firm knowledge, then switch for clients.

The Free plan has no DPA. Client data only goes in once the contract is signed on the Pro plan.

  1. Sign up for free

    Enter your email address and create your account. For one user, no credit card.

  2. Start with your firm knowledge

    Add fact sheets, circulars and template letters, documents without client data, and ask your first questions.

  3. Switch to Pro for client work

    Sign the DPA and the undertaking under § 203 StGB online, then connect the client folders.

Available today: file server, SharePoint, OneDrive, Exchange, Confluence and Teams. All integrations

What it costs for your firm.

All prices net, excluding VAT. Compare all plans

5 users

€124.50per month, net

5 × €24.90 with Pro

  • Free

    €0 for one user

    For testing with firm knowledge.

    • 3,000 AI credits per month
    • 2 GB storage
    • No DPA, no client data
    Start for free
  • Recommended for client work

    Pro

    €24.90 per user per month

    For real client data.

    • 50,000 AI credits per user per month
    • 100 GB storage per user
    • DPA and § 203 StGB online
    Start with Pro

  • Private Spark

    €2,790 per month

    The AI sits in your own office.

    • NVIDIA DGX Spark included
    • 24-month term
    • No token costs for local requests
    See Private Spark

Questions before you start.

Rather talk in person?

We will show you souveraen.ai in 30 minutes, using your own example.

+49 3744 365 2202
What can I test on the Free plan?

Everything that works with documents without client data: fact sheets, circulars, the firm handbook and template letters. You see how souveraen.ai looks things up and drafts text before any contract is needed.

Does souveraen.ai meet § 203 StGB and § 62a StBerG?

We commit to confidentiality under § 203 StGB and, from Pro, sign a DPA under Art. 28 GDPR. You sign both online. For your review under § 62a StBerG, you receive our security concept.

Which tasks can be automated?

Recurring work such as requesting missing documents, comparing assessments with the return and noting deadlines. A workflow starts on a new email, a Teams message or a schedule. Emails to the outside wait for your approval.

Does this replace the tax review?

No. souveraen.ai finds differences and writes drafts. Whether you file an objection is your decision.

Can the AI read scanned assessments?

Yes. Text recognition reads scans, and the answer names the page in the scan.

Is client data used for training?

No. The models do not learn from your documents, and external models do not store your inputs.

Start with your firm knowledge.

Free for one user. For client data, you sign the DPA and § 203 StGB online from Pro.

No credit card needed. Rather call: +49 3744 365 2202

Free for one user, no credit card.No credit card
Start for free