The Company Brain
that knows your organisation –
and everything out there.

Just ask – c:node checks your systems, registers and the applicable law and answers with the source. Decisions up to 7× faster, evidenced answers up to 24× cheaper.

Diagram: c:node connects your systems (e.g. Microsoft 365, Slack, Notion, Personio, Gmail) and the world out there – public sources from the EU and its member states (EUR-Lex, TED, Eurostat, company and lobby registers) with the AI model of your choice (e.g. Claude, GPT, Gemini, Mistral, Llama, Qwen) – every answer with its source.

c:node Assistant
Good morning. Where shall we start?
Pick a case. c:node checks your documents, registers and applicable law – and backs every statement with a source.
Clickable · sample cases with sample data · real legal bases
EU cloud or your servers · every answer with its source
Built for
GDPREU Artificial Intelligence Act
Certified byBSFZ · German R&D tax incentive (Forschungszulage)
Funded byGerman Federal Ministry of Research, Technology and Space
For regulated industries

Decide faster – and evidence every decision.

Where supervisors, auditors or courts ask questions, a good answer is not enough: it has to be evidenced. c:node brings your records, registers and the law in force into one answer – so you decide up to 7× faster and can prove every step.

See all use casesSee agents for your industry
The difference

Same model – with c:node it knows your organisation and everything out there.

Left: with c:node – evidenced from your data, registers and the law in force. Right: the model alone. Pick a case and a model and compare.

:node+your data + c:node Graph
:nodewritten with
Thinking …
    Decision
    alonetraining knowledge only
    Thinking …
    Decision

    Watch c:node check it live – step by step.

    Sample cases with sample data. The “alone” answers are paraphrased reconstructions in the typical style of each model – not verbatim outputs. Claude, GPT, Gemini, Mistral, Qwen and Llama are trademarks of their respective providers; c:node integrates these models.

    How c:node works

    Your organisation and the world outside –
    in one evidenced answer.

    1
    Your organisationYour systems and documents. c:node only sees what you are allowed to see.
    Microsoft 365Google WorkspaceLexwaresevDeskPipedriveNotionStripeHetznerSalesforceHubSpotPersonioSlack
    2 connectors ready to use, more such as Lexware, Salesforce or HubSpot on request – plus any system with an API.
    3
    c:node links & verifiesBrings both together and checks every statement against its source.
    4Evidenced answer

    For your teams and agents. Every statement shows its citation.

    Customer file p. 3GwG § 15Commercial register
    with any model
    2
    The world outsideThe c:node Graph: law, registers and the market – publicly verifiable.
    Law · EU & federal38legal acts with industry impactCommercial register3.19Mcompanies in DE & CHTenders51,773awards & tenders · TEDLobby register20,811interest representatives DE & EUSanctions listsEU & UNscreened in every checkSources & standards38sources & standards · 99.9%+ of concepts backed by a source
    42,074 evidenced terms · as of 12 Oct 2026 · live in the c:node Graph ↗
    Speed & cost

    With c:node, an evidenced answer costs a fraction.

    Without c:node, you paste documents into the model by hand, round after round. c:node gives the model only the matching evidence – one round is enough. Check the maths yourself.

    Example: checking 23 contracts against the EU Data Act
    :node 0.0 s
    0.0 s
    Sources & reasoning trail
    1. Model prices – list prices per 1M tokens, standard tier, as of 29 Sept 2026: Anthropic · OpenAI · Google Gemini (prompts up to 200,000 tokens) · Mistral.
    2. Conversion – ECB reference rate of 28 Sept 2026: €1 = US$1.1378.
    3. Own server – AWS EC2 g4dn.xlarge (NVIDIA T4) in Frankfurt, on-demand $0.658/h = €0.578/h (AWS price list, confirmed by our billing). Qwen 2.5 7B via Ollama; estimated throughput: 1,500 tokens/s input, 35 tokens/s output, 4 requests in parallel.
    4. Model alone – documents are pasted in by hand (example: 23 cloud, maintenance and data contracts plus excerpts from the Data Act and GDPR, around 175,000 tokens in total). 4 rounds until the final answer; each round resends the history. Calculated in the model’s favour with prompt caching (round 1 +25% cache surcharge, then cache read price; simplified for all providers). 900 tokens per answer, plus 1,500 thinking tokens for large models.
    5. c:node – search in graph and index runs locally, without tokens. The model reads only the evidence (around 6,000 tokens + 1,400 tokens of instructions/question) and answers once: 800 tokens, plus 400 thinking tokens for large models. Evidence check is deterministic.
    6. Compute time – assumed output speed: 70 tokens/s (large models), 150 tokens/s (small), plus 1.2 s to the first token; c:node an additional 1.8 s for search. The time spent gathering documents by hand is not included.
    7. Why less context is better – Liu et al., “Lost in the Middle” (TACL 2024): models overlook information in the middle of long texts. OG-RAG (EMNLP 2025): +55% fact recall through ontology grounding, across four models.

    Sample cases with sample data. Actual costs depend on document size, follow-up questions and plan.

    Security & auditability

    Audit-ready – in the EU or on your premises.

    Built for regulated organisations: permissions from your systems, an audit trail for every answer – and your data stays where you want it.

    EU cloud · Frankfurt
    Your data centre
    Air-gapped

    Your own tenant in the EU cloud in Frankfurt – separate from all others.

    Or entirely in your data centre, without internet access if you wish (air-gapped).

    GDPRGDPR · data in the EU
    EU AI ActBuilt for the EU AI Act

    Under the GDPR: your data stays in the EU. Your content does not train any models.

    Built for the EU AI Act: traceable answers, logs and human oversight.

    You decide which models are permitted – or use open models on your own servers.

    c:node checks every statement against its source. If the evidence is missing, c:node says so.

    SalesforceMicrosoft 365Personio

    Access rights are inherited from your systems: each person only sees what they are allowed to see there.

    Every answer lands in the audit trail with its source – traceable for supervisors and internal audit.

    Use it anywhere

    Start free in the browser. Later in the EU cloud or on your premises.

    try.c-node.ai
    Which AI Act obligations apply to us as the deployer of an applicant screening system?
    :node
    How c:node checked this · 2 statements checked, all evidenced

    Applicant screening counts as high-risk AI. As the deployer, you must use the system in line with its instructions for use, assign human oversight and retain the logs.

    EU AI Act · Annex III No. 4EU AI Act · Art. 26
    Keep asking …
    muster-gmbh.c-node.ai
    Tenant · Muster GmbHYour own instance, separate from all others
    EU cloud · Frankfurt
    RegionFrankfurt am Main (eu-central-1)
    Users24 · sign-in with your Microsoft account
    Access rightsinherited from your systems
    ConnectorsSharePoint · Personio · Lexware · Salesforce
    ModelsMistral Large 3 · Claude Sonnet 5.5
    Audit trailactive – every answer with its source
    c-node.intern.muster.de
    c:node on your serversEnterprise · your data centre
    On-prem
    ModelQwen 2.5 locally via Ollama
    c:node Graphmirrored locally
    Internal graphon your storage
    Sign-inyour Active Directory
    Networkworks without internet (air-gapped)
    Data leaves the buildingnever
    >_ agent● c:node MCP

    › Check whether our new supplier Nordwerk is on a sanctions list.

    cnode_askTool call
    { "frage": "Nordwerk Logistik GmbH – sanctions lists",
      "profil": "compliance" }

    ↳ 4 pieces of evidence · 2 sources · permission-aware

    EU financial sanctions list · screening

    Transparency register · beneficial owners

    Result

    No exact match. Similar name of a holding company managing director (84%, different year of birth) – clear up before the contract starts.

    ✓ Evidenced from a single tool call

    Search Muster GmbH
    # procurement
    JM
    Julia Meier10:42

    @c:node Can we already place the order with Nordwerk?

    :nodeAPP10:42

    Not yet – enhanced due diligence is under way. A name match on the EU sanctions list is still open.

    Customer file p. 3EU sanctions list
    Message #procurement
    Framework agreement Hosting Nord×Inbox+
    ‹ › ↻intranet.muster.de/vertraege/hosting-nord
    Framework agreement Hosting NordContract archive

    § 14 Term and termination: minimum term 24 months, notice period 6 months …

    :node×
    Is § 14 compatible with the Data Act?
    :node
    How c:node checked this · 1 statement checked, evidenced

    No – the Data Act allows switching provider with at most 2 months’ notice.

    EU Data Act · Art. 25
    Frequently asked questions

    Explained in brief.

    Anything else? Talk to us.

    What is c:node?

    c:node is the Company Brain for your organisation. It connects your systems and documents with law, registers and the market in the c:node Graph. Every answer shows its source.

    How is c:node different from ChatGPT, Claude or Copilot?

    c:node uses the same models. But it gives them your data and the c:node Graph and checks every statement against its source. So you get findings on your case instead of generic answers.

    Can c:node make things up?

    c:node checks every statement against its source. Whatever it cannot back with evidence, c:node does not claim. Instead, it tells you which information is missing.

    Where is our data stored?

    In your own tenant in the EU cloud in Frankfurt – or entirely in your data centre, without internet if you wish. Your content does not train any models. c:node is built for the GDPR and the EU AI Act.

    Which AI models does c:node use?

    You decide: Claude, GPT, Gemini or Mistral in the EU cloud – or open models such as Qwen and Llama on your servers. c:node picks the right model for each question.

    Which systems can be connected?

    Microsoft 365 and Google Workspace are ready to use – nothing is written until you click “Approve”. Our connection team sets up others such as Lexware, Pipedrive, Notion, Salesforce or Personio on request. Plus any system with an API. And c:node works directly in Claude, Copilot & your agents.

    How much does c:node cost?

    Starter costs €49 per seat per month, Professional €490 a month with 5 seats included, each additional seat €59. Enterprise with on-prem for regulated organisations from €1,500 a month. All prices excl. VAT. The sandbox is free. All prices

    How quickly can we get started?

    In the sandbox, immediately. For your own tenant, we start with a short test on your real questions. The value shows in the first evidenced answers – not after a 6-month project.

    Can we run c:node under our own brand?

    Yes. c:node can run under your brand (white label): the same platform with your logo. The c:node shell is also available as open core on GitHub.

    Get started now

    Start for free – and decide with evidence.

    Test c:node with your domain. Then we show it to you on one of your real questions. EU cloud from €49 per seat (excl. VAT), on-prem for regulated organisations.

    up to24×cheaper per evidenced answer
    “
    We built c:node because AI only really gets used in regulated organisations when every answer has a source. That is exactly what we deliver – with any model, in the EU or on your own servers.
    Leonardo Bornhäusser
    Leonardo BornhäusserManaging Director & CTO, Creativate