Null Chat
A model-agnostic AI chat for everyone in your company, with the privacy layer on by default.
Privacy runs in the background.
Every prompt, every attachment, every model call is inspected and tokenized before it leaves. Your people don't toggle anything. They just chat.
Pick the best model for the job.
GPT-5.1, Claude 4.5 Sonnet, Mistral Large 3, or self-hosted Llama. Admins decide what's allowed. Users just pick from a list.
Cleartext never leaves the device.
Re-identification happens in the browser. Server logs, inference traces, training data, none of them ever see a real name or case ID.
Switch models mid-thread.
Start a legal review in Claude. Finish the draft in GPT-5.1. Route a sensitive schedule check to your self-hosted Llama. Null maintains the same vault across models, so tokens are stable, references resolve, and audit stays coherent.
Drop a contract. Ask anything.
Upload 200 pages of underwriting notes, a patient file, or a claims folder. Null's Document Intelligence engine parses every page, detects sensitive data with structure awareness, and swaps it with stable Vault tokens before the model sees a word.
ORG_A·44LT3R → Hanseatic Versicherung AG · confidence 0.99
ADDR_A·9MPLR2 → Fährkanalstraße 12, Hamburg · confidence 0.96
POLICY_A·33891 → HV-2020-33891 · confidence 0.94 (rule)
DATE_X·81QKP2 → 2026-03-14 · confidence 0.99
AMOUNT_A·18420 → €18,420 · confidence 0.91
Company playbooks, on tap.
Your compliance team writes the prompts once. Everyone runs them with one click, with the right variables, the right model, and the right token scope. No more copy-pasted prompts drifting across Slack.
Shape it to your org.
Every team, department, or case folder gets its own workspace, with its own models, prompts, knowledge base, and audit trail.
Isolated by design
Each workspace has its own vault, its own allow-list, and its own audit log. Cross-contamination between cases is architecturally impossible.
Invite by role
SCIM-provisioned groups. SSO-gated access. Role-based prompts, knowledge, and reveal scopes, no one toggles a setting they shouldn't.
Knowledge base
Upload policy libraries, benefit schedules, pricing decks. Employees can ground every answer in your own sources, tokenized if they contain sensitive data.
Continuous audit
Every prompt, every model hop, every reveal, written to a tamper-evident log. Export for internal audit, regulator, or court order in one click.
Designed for the auditor, not just the user.
Null Chat was designed from the governance side first. DPA, ROPA templates, Art. 32 “state of the art” pseudonymization, and an EU AI Act risk-classification worksheet , all shipped with the product.
See Null Chat on your own document.
Bring a real claim file, contract, or medical note. We'll load it into a sandbox workspace with you. You keep the vault. Nothing leaves the room.