Lexiel/vs Microsoft Copilot
Comparison · Generic AI
Microsoft Copilot vs Lexiel : generic Office assistant vs specialised legal AI
Microsoft Copilot is a generative AI assistant integrated into Office 365. Useful for drafting emails and summarising documents, but with no Spanish legal corpus, no legal citation verification and no case management. Lexiel adds legal accuracy: 99.3% on the Bar Exam (144/145) and 98.4% on the Judiciary Exam (253/257), verified BOE+CGPJ, procedural deadlines, CRM and Verifactu invoicing.
Lexiel vs Microsoft Copilot: key features
Evaluation based on publicly available information as of Q1 2026.
FAQ: Microsoft Copilot vs Lexiel
Is Microsoft Copilot reliable for Spanish law queries?
Microsoft Copilot is a general-purpose AI without a verified Spanish legal corpus. It cannot access BOE or CGPJ, may invent non-existent articles or rulings (hallucinations), and does not verify citations against official sources. Lexiel scores 99.3% on the Bar Exam (144/145) and 98.4% on the Judiciary Exam (253/257) through its specialised legal RAG.
Is Microsoft Copilot GDPR-compliant for law firms?
Microsoft Copilot processes data outside the EU by default. For a law firm, this raises risks under GDPR (Art. 28) and may compromise attorney-client privilege. Lexiel hosts all data on European servers (Madrid) and does not use user data to train models.
Can Microsoft Copilot draft court briefs with BOE citations?
Microsoft Copilot can generate legal-looking text but cannot verify that citations are real. The risk of presenting a non-existent ruling or article in court is significant. Lexiel generates briefs with citations verified against BOE and 1,868 CENDOJ rulings, with reference to the original source.
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