What is LEGAION and how is it different from Harvey AI?

LEGAION is the world's #1 Legal Intelligence Platform with the only built-in Verifier Engine™. Unlike Harvey AI which generates responses without verification and can hallucinate, LEGAION audits every single claim with citations from case law, statutes, and regulatory databases. This means you get accurate, verifiable legal insights with zero AI hallucinations - critical for malpractice prevention.

Is LEGAION better than Harvey AI for contract review?

LEGAION offers significant advantages over Harvey AI for contract review. Our Verifier Engine™ cross-references every clause against legal databases and provides source citations. While Harvey AI generates plausible-sounding analysis that may contain errors, LEGAION verifies each finding with actual legal authority. AmLaw 100 firms report 40% fewer review cycles after switching from Harvey AI to LEGAION.

How does LEGAION compare to CoCounsel by Thomson Reuters?

LEGAION surpasses CoCounsel with our unique Verifier Engine™ technology and Cross-Border Shield for international transactions. While CoCounsel integrates with Westlaw, LEGAION works with all major legal databases and provides citation verification. LEGAION also offers Autonomous AI Agents for negotiation and Judge Profiling analytics that CoCounsel lacks.

Can LEGAION replace Harvey AI for my BigLaw or AmLaw 100 firm?

Yes, LEGAION can fully replace Harvey AI with significant advantages. We offer AI contract analysis, legal research, document drafting, M&A due diligence, and autonomous negotiation agents — all with citation verification. LEGAION is trusted by AmLaw 100 firms, Magic Circle practices, and European law firms who switched from Harvey AI for measurable accuracy: every citation is verified against ISAP, EUR-Lex and USPTO by Verifier Engine (P.454531) before delivery.

What is LEGAION pricing compared to Harvey AI and CoCounsel?

LEGAION offers competitive pricing starting with a 14-day trial (card required, auto-converts to paid subscription, cancel anytime). Professional plans start at $299/user/month. Unlike Harvey AI's enterprise-only pricing or CoCounsel's bundled costs, LEGAION has transparent pricing for solo practitioners, mid-size firms, and enterprise clients. Firms typically save 30-50% compared to Harvey AI while getting superior citation verification.

Is LEGAION GDPR compliant and what is its certification status for European law firms?

LEGAION runs exclusively on EU-only infrastructure that is SOC 2 Type II and ISO 27001 certified at the hosting layer. The product itself maintains GDPR/RODO operational compliance, EU AI Act readiness, and NIS2 alignment. A SOC 2 Type II audit at the company level (Aidvocates, Inc.) is on the roadmap and was initiated in 2027. All data is encrypted end-to-end with Private Vault zero-knowledge storage. We support 15+ languages including German, French, Spanish, Italian, Polish, and Japanese.

Does LEGAION support M&A due diligence and cross-border transactions?

LEGAION excels at M&A due diligence with features competitors lack. Deep X-Ray analyzes contracts for 200+ risk categories, Cross-Border Shield identifies US/EU/UK/APAC regulatory conflicts, DealRoom provides secure collaboration, and Verifier Engine™ ensures every finding is backed by legal authority. Perfect for cross-border transactions where accuracy is critical.

What AI features does LEGAION offer that Harvey AI doesn't have?

LEGAION offers unique AI features unavailable in Harvey AI: (1) Verifier Engine™ - citation verification for every claim, (2) Autonomous Negotiation Agents - AI-to-AI negotiation, (3) Judge Profiling - judicial tendency analytics, (4) Cross-Border Shield - multi-jurisdiction compliance, (5) Witness Prep AI - deposition preparation, (6) LEGAION Predict™ - 94% accurate case outcome prediction, (7) DealRoom - secure M&A collaboration.

How accurate is LEGAION compared to other legal AI tools?

LEGAION achieves 99.7% citation accuracy with our Verifier Engine™ - the highest in the industry. Unlike Harvey AI or CoCounsel which can generate plausible-sounding but incorrect information, every LEGAION response is verified against authoritative sources. Our LEGAION Predict™ achieves 94% accuracy in case outcome predictions. We publish accuracy metrics transparently.

Can LEGAION integrate with existing law firm software?

Yes, LEGAION offers comprehensive integrations including Microsoft 365, Google Workspace, Microsoft 365, Google Workspace and Clio today; iManage and NetDocuments connectors on the H2 2026 roadmap. We provide REST API and GraphQL access, webhooks for automation, and SSO/SAML for enterprise authentication. White-label options are available for large deployments.

Customers

Trusted by practices that cannot afford to be wrong.

From BigLaw to sport clubs, from fintech legal teams to canonical tribunals - LEGAION is deployed where verifiability, security and sub-100ms latency are a requirement, not an ornament.

Jurisdictions

12,400

Documents verified

Unverified citations released

99.97%

Uptime SLA

Selected clients & partners

Ruch Chorzów

Boutique Firm - Wrocław

TaxBridge Partners

IP Sentinel (Pilot)

Sport Legal EU (Pilot)

Ecclesia Curia (Pilot)

Cross-Border Council

AmLaw 100 - Innovation Lab

Full client list available under NDA

Featured deployment

Ruch Chorzów × LEGAION Arena

Full management of player contracts, cross-border transfers and FIFA RSTP compliance in a single workspace. Verifier Engine validates every contract clause against current UEFA, FIFA and national-law regulations.

73%

Faster

RSTP errors

Jurisdictions

See Lex Sportiva Hub

Live Deployment

Ruch

Chorzów

Sport / Lex Sportiva · Q4 2025 - Active

Case Studies

Measurable outcomes across six legal verticals.

Sport / Lex Sportiva

73% faster transfer-contract close

End-to-end player transfer with FIFA RSTP verification, transfer-clause review and cross-border tax-risk analysis in a single workflow.

73%

faster

Ruch Chorzów

BigLaw

1,200 hours saved on Q1 M&A due diligence

Deep X-Ray + Verifier Engine across 8,400 transaction documents. Zero false-positives on critical clauses.

1,200h

saved

Partner-Track Firm - Warsaw

In-House / Fintech

Cross-Border Shield across 23 jurisdictions in 6 weeks

Full regulatory-risk mapping (PSD2, DORA, MiCA) with automated remediation in Wrench.

jurisdictions

Legal Dept. - EU Fintech

Tax Advisory

Tax Scout flagged €1M WHT exposure in client portfolio

Deterministic Withholding-Tax analysis with the DTT-First protocol across 142 cross-border transactions.

€1M

exposure

TaxBridge Partners

IP / Patents

Pre-Crime IP detected mark collision 8 months pre-filing

Global USPTO + EUIPO + WIPO monitoring with behavioural analysis of trademark squatting.

8 mo.

earlier

IP Sentinel (Pilot)

Canon Law

First AI engine for canon law with 1917 + 1983 corpus

Tribunal Navigator with full indexation of canons and Roman Rota case-law.

100%

corpus

Diocesan Tribunal (Pilot)

Testimonials

In the words of managing partners and CTOs.

"Verifier Engine changed how we sign opinions. For the first time I can give a client a written guarantee that every citation was cross-checked against ISAP on the day the opinion went out."

Managing Partner

Top-15 PL Firm

BigLaw

"Cross-Border Shield did in 6 weeks what previously required 4 external counsels in 4 countries. The audit trail is unimpeachable."

Head of Legal

EU Fintech (Series C)

In-House

"LEGAION is not another GPT wrapper. It is real infrastructure - with a patent, dual-model verification and EU-only routing. The first enterprise-grade I've seen in LegalTech."

CTO

AmLaw 100 - Innovation Lab

BigLaw US

Industries

Six verticals. One platform.

BigLaw

Due diligence, M&A, litigation prep

See hub

In-House

Compliance, contract lifecycle, risk

See hub

Sport / Lex Sportiva

Transfers, FIFA RSTP, image rights

See hub

Tax Advisory

WHT, DTT, transfer pricing

See hub

IP / Patents

USPTO, EUIPO, WIPO monitoring

See hub

Ecclesia

Canon law, tribunal navigator

See hub

Trust & Compliance

Security at national-infrastructure grade.

AES-256-GCM E2EE

Strong client-side encryption

GDPR / RODO

EU data residency

ISO 27001

In progress - Q3 2026

SOC 2 Type II

In progress - Q4 2026

EU AI Act Art. 50

Transparency compliant

Zero-Knowledge

Operator cannot read content

Aidvocates, Inc. (Delaware File 10564433 | EIN: 36-5174390)

136 Madison Avenue, NY 10016

Aidvocates Group sp. z o.o. - Katowice HQ

EU-Sovereign Cloud · Frankfurt / Warszawa / Dublin

Join the practices already
running on LEGAION.

46 jurisdictions. Zero unverified citations released. Audit trail on every click.

Book a demo See pricing

Operator⌘K

Legal Disclaimers

Show details

LEGAION delivers verified facts (Hard Facts) and auditable conclusions (Derived Claims). Outputs depend on the quality of inputs and the freshness and availability of verified legal sources (ISAP, EUR-Lex, KRS, USPTO). The platform does not provide legal advice — decisions remain with a licensed attorney.

Hard Facts (HF)

Verified against official publications.

Derived Claims (DC)

Conclusions with a documented evidentiary chain.

Opinion Statements (OS)

Clearly labeled — never presented as fact.

Professional legal judgment and client representation remain the exclusive domain of licensed attorneys. LEGAION augments — it does not replace — qualified legal counsel.

Full availability terms (guaranteed uptime threshold pending — public status page coming soon), citation verification and liability limits:

Trust & Compliance View full SLA

Trusted by practices that cannot afford to be wrong.

Ruch Chorzów × LEGAION Arena

Measurable outcomes across six legal verticals.

73% faster transfer-contract close

1,200 hours saved on Q1 M&A due diligence

Cross-Border Shield across 23 jurisdictions in 6 weeks

Tax Scout flagged €1M WHT exposure in client portfolio

Pre-Crime IP detected mark collision 8 months pre-filing

First AI engine for canon law with 1917 + 1983 corpus

In the words of managing partners and CTOs.

Six verticals. One platform.

BigLaw

In-House

Sport / Lex Sportiva

Tax Advisory

IP / Patents

Ecclesia

Security at national-infrastructure grade.

Join the practices alreadyrunning on LEGAION.

Legal Disclaimers

Join the practices already
running on LEGAION.