Legal · Privilege · Ethics · Discovery
AI you can use without breaching privilege.
Private AI for solo attorneys, boutique firms, in-house counsel, and corporate investigations teams — built so your AI conversations are work product, not discovery.
The duty of confidentiality is the floor of every legal practice. Most AI tools fail it on the first prompt. ArcaKey is the only AI environment that lets you draft, analyze, and strategize on the actual file — privileged, encrypted, gone after the session — with the legal opinion to back it up.
Five ways legal uses Arca · Key every day.
01
The litigator drafting under privilege.
A plaintiff's attorney working on a summary-judgment opposition. The prompt contains client deposition testimony, opposing expert reports, draft strategy, and witness-credibility assessments — every word is privileged work product. With a commercial LLM, you have potentially created a discoverable communication outside the privileged circle. With ArcaKey, the AI is treated like an associate: encrypted, in-circle, gone after the session.
02
The divorce and family-law attorney.
The contents of any file: alleged affairs, hidden assets, mental-health records, allegations involving children. Daily AI use — drafting custody schedules, demand letters, financial-discovery analysis — is impossible on commercial AI without breaching the duty of confidentiality. ArcaKey is the AI a family lawyer can use on every case, not just the safe ones.
03
The transactional lawyer drafting an APA.
M&A purchase agreements contain target financials, indemnification structures, customer lists, and key-employee identities. The deal isn't supposed to exist anywhere outside the closing room — including a third-party AI tool. ArcaKey is the AI inside the closing room: present, secure, no record outside the deal.
04
Internal investigations and white-collar defense.
By definition, the content includes accusers, accused, third parties, evidence, and draft conclusions — often regarding senior people. ArcaKey is the only way to bring AI into investigation work without expanding the investigation's exposure surface.
05
IP and patent prosecution.
Pre-filing claims of an invention are the entire asset. The moment they touch an external LLM, the firm has potentially compromised novelty and possibly the patent itself. ArcaKey protects the entire pre-filing workflow — drafting claims, analyzing prior art, prosecution strategy — inside an encrypted environment an examiner couldn't object to.
Built for.
Solo attorneys
A solo litigator uses Executive for case strategy, brief drafting, and deposition prep — privileged work product that needs to stay privileged.
Boutique firms (3–10 attorneys)
A boutique IP firm uses Teams Professional for patent-application drafting, prior-art analysis, and prosecution-strategy collaboration.
Mid-size firms (10–50 attorneys)
A 30-attorney litigation firm uses Teams Executive across practice groups, with role-based memory policies, SSO, and a named CSM.
Family law & divorce specialists
A family-law boutique uses Teams Professional for case-strategy work that contains the most sensitive personal information any practice handles.
Criminal defense attorneys
A solo criminal-defense attorney uses Executive for case strategy, plea analysis, and witness-prep — work that, if exposed, can cost a client their freedom.
Immigration attorneys
An immigration practice uses Teams Professional for client-document analysis and asylum-claim drafting, with encrypted memory across long-running cases.
In-house counsel & corporate legal departments
A pre-IPO company's GC uses Executive for board materials, deal review, and internal investigations, with Ghost Mode for the most sensitive sessions.
Internal investigations & ethics teams
A regulatory-investigation team uses Teams Executive or Enterprise for evidence analysis, witness summary work, and draft-finding production — encrypted, audit-logged, defensible.
Knowledge Pack & Secure Search.
The Legal Knowledge Pack
Curated, pre-ingested reference content, queryable without ever leaving the vault:
- State bar ethics opinions (initial coverage: CA / NY / TX / FL / IL; expanding)
- ABA Model Rules of Professional Conduct with state modifications
- Selected court-doc archives (federal, state appellate)
- Attorney-client privilege reference and case citations
- AI-confidentiality bar opinions and ethics committee guidance
- State rules of civil procedure and evidence (by jurisdiction)
Zero external egress. Your queries against these references stay inside the encrypted environment. Current, relevant, and never exfiltrated — your research never signals what case you're working on.
Secure Search — Executive, Sovereign, Teams Executive, Enterprise
When you need information beyond the Knowledge Pack, — a recent appellate decision, a news event about an opposing party — Secure Search handles the outbound query privately:
- Scrubs email, phone, SSN, credit card, DOB, titled-person, and street-address patterns from the query before anything leaves the vault.
- Routes the scrubbed query through a sandboxed Brave Search integration — tenant-isolated, never pooled with other search traffic.
- Returns results with inline citations; raw query is not persisted beyond the request.
- Emits an Ed25519-signed proof-of-purge record (hashed scrubbed query + categories redacted + counts; never the values) usable for discovery-response attestation or internal audit.
- Self-hosted SearXNG variant for privacy-absolute workflows is on the Q2 2026 roadmap — Brave-backed path is live today for Executive+ accounts with a Brave API credential.
Google with the receipts — and none of the surveillance.
What’s included for legal.
- Attorney-client privilege preservation memo — scheduled with outside counsel; available to Sovereign and Enterprise applicants under NDA on completion. Architectural basis for the memo ships today (see /security).
- Encrypted memory across matters — never lose context, never let it become discoverable.
- Ghost Mode session toggle — zero retention on demand for privileged sessions.
- Bar-aligned retention policies — configurable retention windows mapped to common bar guidance on AI confidentiality.
- Exportable signed audit log — defensible record of AI use for client billing, ethics review, and discovery response.
- TEE-isolated inference — NVIDIA H100 confidential computing with NRAS attestation. Live attestation endpoint ships today in stub mode; transitions to live NRAS on GCP A3 CC capacity cutover. See /security for the per-session evidence artifact.
- Post-quantum encryption (ML-KEM-768 / CRYSTALS-Kyber) — the encryption standard NIST has finalized for the next decade.
- Higher-capacity reasoning for Executive+ — 7B / 8B default on Professional for throughput; Qwen 72B / Llama 70B available on request today, routed through GCP A3 Confidential VM on capacity cutover.
Pricing for legal.
| Buyer | Recommended tier | Starting price |
|---|---|---|
| Solo attorney | Professional | $499/mo |
| Solo attorney with high-stakes practice (M&A, IP, white-collar) | Executive | $1,499/mo |
| Boutique firm (3–10 attorneys) | Teams Professional | $399/seat/mo |
| Mid-size firm (10–50 attorneys) | Teams Executive | $1,199/seat/mo |
| Large firm or in-house dept (25+ seats) | Enterprise | from $1,199/seat/mo, negotiated |
| GC of HNW principal | Sovereign | from $4,999/mo |