Your AI legal copilot
Analyze documents, search case law, and generate legal briefs in seconds. Specialized in Spanish and Latin American law, verified against official sources.
Designed for legal professionals across Spain
Leading firms already integrating AI in their legal practice
The world's top firms use artificial intelligence to boost efficiency
#1 in legal accuracy for Spanish law
98.1% on the Bar Access Exam (304/311) and 99% on the Judiciary Exam (99/100). Blind evaluation with verified Ministry of Justice and CGPJ answer keys.
See results & methodologyLegal accuracy: Bar Exam + Judiciary · Mar 2026
* Bar Exam 2025: 304/311 questions (98.1%). Judiciary CGPJ 2025: 99/100 (99%). Combined: 98.1% (411 questions). Competitors measured without specialized legal corpus. Model: Gemini 3.1 Pro with RAG, evaluated Mar 2026.
How it works
From document to verified result in three steps
Upload your document
Drag contracts, complaints, or judgments. Supports PDF, DOCX, and plain text.
AI analyzes
Our legal model processes, extracts key clauses, and identifies risks.
Verified results
Get analysis with citations to official sources, verified against BOE, CGPJ, and each jurisdiction's databases.
Everything you need
AI tools designed by and for lawyers
Legal AI Chat
Ask any legal question and get precise answers citing articles, case law, and BOE. No hallucinations.
Anti-Hallucination Verification
Every citation is cross-checked against BOE and CGPJ in real time. If it cannot verify, it tells you. Zero reputational risk.
Document Analysis
Upload contracts, complaints, or judgments and detect unfair clauses, risks, and key points in seconds.
Case Law Search
Semantic search across thousands of Supreme Court and appellate judgments. Find the precedent you need.
Legal Writing Generator
Generate drafts of complaints, answers, appeals, and contracts. You review and sign; AI does the heavy lifting.
Deadline Management
Automatic calculation of procedural deadlines by procedure type. Alerts before a critical deadline slips by.
Adversarial Analysis
NewDoes your brief have weak points? Find them before opposing counsel does. AI analyzes your arguments from the opponent's perspective.
Declaration Prep
Generate interrogatories, prepare witnesses, and anticipate opposing counsel's questions before trial.
Escribano AI
NewRecord client meetings, transcribe automatically, and generate minutes with key points, action items, and legal references. Everything indexed and searchable from the chat.
Legal CRM
NewConvert WhatsApp, voice or web leads into clients with a complete profile. Visual pipeline lead → client, fiscal data, and matter history.
Professional Invoicing
NewGenerate official invoices from tracked time. Automatic IVA/IGIC/IPSI by territory, IRPF withholding by legal form, sequential numbering.
VeriFactu (AEAT)
NewCompliance with Royal Decree 1007/2023. Each invoice generates a chained SHA-256 hash and QR code verifiable with the Spanish Tax Agency.
24/7 Voice & Chat Agent
NewAttend and capture clients around the clock via WhatsApp, web, Instagram, and phone. Auto-qualifies leads and notifies you when a potential client is ready.
Time Tracking
Integrated timer per case and task. Generate invoices directly from logged hours, with AI-generated descriptions and fee calculation to the second.
Client Portal
NewYour client uploads documents without creating an account. Send a tokenized link, they attach what you need. Real-time tracking from the case file.
AI Contract Analysis
NewClause-by-clause analysis with Spanish legal context. Detects risks, unfair clauses, and contractual imbalances in seconds.
Client Messaging Portal
NewDirect communication channel with your clients from the case file. Async messaging, automatic notifications, and AI-generated formal communication drafts.
Procedure Engine
NewStep-by-step procedural workflow. Select the type (ordinary, summary, family...), the system generates briefs for each phase with deadlines and required documents.
Electronic Signatures
NewSend documents for legally valid electronic signature. Signaturit integration, automatic reminders, and tracking from the case file.
LexNET Preparation
NewValidate and prepare your briefs for electronic filing. Checks format, size, metadata, and court requirements before submission.
Firm Knowledge Base
NewCentralize your firm's knowledge. Upload templates, models, and internal documentation. The AI includes them in its responses.
Client Intake Form
NewGenerate a public link for potential clients to submit their query with documents. No login, tokenized, straight to your CRM.
Legal Calendar
NewUnified monthly view of procedural deadlines, meetings, and due dates. Google Calendar and Outlook integration.
Supported Jurisdictions
Verified legal corpus from 20 Spanish-speaking countries
Spain
BOE, CGPJ, Supreme Court
Mexico
DOF, Chamber of Deputies
Colombia
SUIN-Juriscol, Senate
Argentina
InfoLEG, SAIJ
Chile
BCN, Judiciary
Peru
Congress, SUNAT
Only legal AI with Spanish foral law
Complete coverage of Catalonia (CCC, 6 books), Basque Country (foral tax laws from all 3 territories), Navarre (Fuero Nuevo, 596 laws), Aragon, Galicia and Balearic Islands. Automatic territory detection — lawyers get the applicable regional law, not just state law.
Zero hallucinations
Unlike ChatGPT, Lexiel verifies every legal reference against BOE, CGPJ, and official codes. If it cannot verify a citation, it tells you.
Generic AIs hallucinate case law
A fake citation is malpractice. Lexiel verifies every reference against CENDOJ and the BOE before showing it to you.
Question
Can I claim moral damages for workplace harassment?
Yes, you can claim moral damages for workplace harassment. According to Supreme Court Ruling (Social Chamber) of February 14, 2022, ROJ: STS 892/2022, the TS recognized €18,000 in moral damages arising from workplace harassment. Requirements: proven harassment, causal link, and actual harm...
"STS 892/2022" : This ruling does not exist in CENDOJ. Reference fabricated by the AI.
Using this citation in a legal brief could constitute professional malpractice.
Yes. Art. 183 LRJS allows moral damage claims cumulable with wrongful dismissal compensation. The TS (Social Chamber) consolidated this doctrine; see STS 4985/2019 (Rec. 2019/2017) and STS 3270/2021 (Rec. 3270/2019), both verified in CENDOJ.
Lexiel has verified over 95,000 legal fragments against official sources. Score on the Bar Access Exam: 99.3% (149 out of 150 questions).
The only AI built for Spanish-speaking lawyers
ChatGPT, Gemini and Claude are generic tools. Lexiel is the only AI that knows Spanish and Latin American law and verifies every citation before showing it to you.
Comparar con (máx. 3)
Lexiel inside your Word
Analyze, fix and consult case law without leaving Word. Everything you do automatically syncs to your case file at app.lexiel.ai.
Clause SÉPTIMA
RESOLUCIÓN ANTICIPADA
Void clause by law
Art. 11.2 LAU sets a 1-month/year cap. This clause doubles it; legally void and unenforceable.
Legal cap
1 month/yr
This clause
2 months/yr
Case law
Reaffirms that penalties exceeding Art. 11.2 LAU limits are void and unenforceable.
Full interactive demo available on desktop
Contrato de Arrendamiento de Vivienda
En Madrid, a 15 de enero de 2025. De una parte, como ARRENDADOR, D. Antonio García López, mayor de edad, con NIF 12.345.678-A. De otra parte, como ARRENDATARIO, Dña. Carmen Martínez Ruiz, con NIF 98.765.432-B.
CLÁUSULA PRIMERA. OBJETO
El ARRENDADOR cede en arrendamiento al ARRENDATARIO el inmueble sito en Calle Mayor, 24, 3.º B, 28013 Madrid, con referencia catastral 4567890VK4746S0001IW.
CLÁUSULA SEGUNDA. USO Y DESTINO
El ARRENDATARIO destinará el inmueble exclusivamente al uso de vivienda habitual y permanente. Queda expresamente prohibido cualquier uso comercial o profesional.
CLÁUSULA TERCERA. DURACIÓN
El contrato tendrá una duración de cinco (5) años contados desde la fecha de firma, prorrogable anualmente conforme al Art. 10 LAU.
CLÁUSULA CUARTA. RENTA MENSUAL
La renta mensual pactada es de OCHOCIENTOS EUROS (800,00 €), pagadera los primeros cinco días naturales de cada mes mediante transferencia bancaria.
CLÁUSULA QUINTA. FIANZA Y GARANTÍAS
El ARRENDATARIO entrega la cantidad de OCHOCIENTOS EUROS (800,00 €) en concepto de fianza legal conforme al Art. 36 LAU.
CLÁUSULA SEXTA. CONSERVACIÓN Y OBRAS
El ARRENDADOR está obligado a realizar las reparaciones necesarias para conservar el inmueble en condiciones de habitabilidad.
CLÁUSULA SÉPTIMA. RESOLUCIÓN ANTICIPADA
The early termination penalty shall equal two (2) months' rent per year or fraction remaining until the agreed end of the contract, regardless of the reason for termination.
CLÁUSULA OCTAVA. SUMINISTROS
Los gastos de suministros de electricidad, agua, gas y telecomunicaciones correrán a cargo exclusivo del ARRENDATARIO desde la fecha de entrega de llaves.
CLÁUSULA NOVENA. DERECHO SUPLETORIO
En lo no previsto en el presente contrato, se estará a lo dispuesto en la Ley 29/1994 de Arrendamientos Urbanos y demás normativa de aplicación.
Lexiel en Word
Plugin active
app.lexiel.ai
Client case file
Contrato Martínez · Arrendamiento
Analyzed document
Contrato_arrendamiento_Martinez_2025.docx
Analyses run
1 analyses · clause SÉPTIMA
Last activity
Just now · from Word
Changes saved automatically
Every Word correction or analysis is logged in your client case file.
Full analysis history
Access all analyses, accepted suggestions and consulted case law from any device.
Team notifications
Collaborators are notified when you add analyses or fix clauses in shared documents.
Collaborative review
Comment, approve and reject suggestions directly in the case file with your whole team.
Analyze while you draft
Select any clause. Lexiel analyzes it with verified case law without leaving Word.
Insert case law
TS, TC and High Court rulings directly in your document with formatted citation.
Auto-anonymization
Detects names, IDs and sensitive data. Batch-replaces before sharing.
Contract review
Identifies risky clauses and suggests alternatives based on recent case law.
Security & privacy
Your legal data deserves the highest protection
GDPR compliant
Your data is stored on servers within the European Union and protected by GDPR — the world's strictest privacy regulation. No data ever leaves Europe.
End-to-end encryption
Every document you upload and every query you send is encrypted in transit and at rest. Even if intercepted, your data is completely unreadable.
EU AI Act (AIA) ready
We comply with Europe's AI Regulation and all 5 recommendations from the CGAE/ICAV AI White Paper: accountability, human oversight, transparency, privacy, and instrumentality. Every response includes a reliability indicator with verifiable sources.
Local processing available
For maximum control, you can run Lexiel entirely on your own servers. Your documents and queries never leave your infrastructure.
Your data never trains AI
Unlike other AI tools, we never use your documents, queries, or cases to train or improve our models. What's yours stays yours, always.
Audit trail & access control
Every action on the platform is logged. See exactly who accessed what and when, and set granular permissions for each user in your firm.
Automatic data anonymization
Client personal data is automatically masked before being sent to any AI model — GDPR compliance built into the most sensitive part of your workflow.
Immutable audit log
Every action, query, and document is logged with a cryptographic signature — meeting VeriFactu (AEAT) requirements and providing full traceability for any inspection.
Two-factor authentication
Secure your firm access with two-factor authentication (2FA). Enterprise identity management via Keycloak, compatible with Google, Microsoft, and corporate SSO.
What our users say
Lawyers already using Lexiel in their daily practice
“I used to spend 3 hours searching case law for each case. With Lexiel, in 15 minutes I have relevant Supreme Court rulings with citations already verified. It has completely changed my workflow.”
M.S.H.
Partner · Civil & Family Law
“What I value most is that it doesn't make anything up. Every cited article I verify and it's always correct. In a sector where precision is fundamental, that's everything.”
C.R.M.
Attorney, Employment Law
“We manage regulatory compliance for 12 subsidiaries. The document composer saves us weeks of work by generating report drafts that we used to do manually.”
E.T.V.
General Counsel · Compliance
Calculate your return on investment
How much is your time worth? Find out in seconds if Lexiel pays for itself.
Hours recovered/month
Additional revenue
Payback in
Based on documented average AI legal efficiency. Basic plan cost: €69/month.
Backed by the profession
“53.3% of Spanish lawyers consider AI beneficial to their professional practice
You're not a lawyer, but you have a legal problem
Understand your rights before spending on a lawyer. Clear answers, based on the law, no jargon.
Insurance dispute
Denied coverage or underpaid claim. Lexiel analyzes your policy and tells you if you have a case.
Unfair employment contract
Abusive clauses, unpaid overtime, unfair dismissal. Know your rights before you sign or file a claim.
Abusive mortgage clause
Floor clauses, formalization costs, IRPH... Lexiel identifies the illegal clauses in your loan.
Consumer complaint
Defective product, unfulfilled service, inflated bill. File your claim with the right legislation.
Why Lexiel and not ChatGPT?
Answers verified against official legal sources
Specialized in Spanish legislation
Cheaper than a lawyer consultation
ChatGPT can make up articles and rulings that don't exist. Lexiel verifies every citation against official sources.
No card for the free trial. Annual plan, no lock-in.
Invest in efficiency, not hours
Every hour you save is another billable hour. Pays for itself from day one.
Capture clients while you work
Multichannel AI chatbot (web, WhatsApp, Instagram, Facebook) + 24/7 voice agent, by our reference partner in multichannel AI agents.
Basic
14-day guaranteeFor solo practitioners
- Legal AI Chat + Case LawAsk the AI assistant any legal question. Answers grounded in real case law from the Supreme Court and Constitutional Court.
- Document analysis · 20/monthUpload contracts, judgments or briefs in PDF/DOCX and get a full analysis: key clauses, detected risks and improvement points. Up to 20 documents per month.
- Legal writing generatorCreate complaints, contracts, appeals and other legal documents from a case description. Specialized templates by area of law.
- Anti-hallucination verificationEvery response and legal citation is automatically verified against BOE, CGPJ and official databases. You will never receive a citation that does not exist.
- Deadline managementRecord procedural deadlines for your cases and get alerts before they expire. Calculator based on LEC, LCrim and regional holidays.
- Adversarial Analysis · 5/monthThe system analyzes your case from the opposing counsel's perspective: identifies weak points in your position and strategies the other side would use. 5 analyses per month.
- Declaration prepGenerate preparation guides for depositions, witness statements and expert reports. Includes likely questions from opposing counsel.
- Escribano AI · 5 meetings/monthRecord client meetings and the system automatically generates minutes, relevant facts and next steps. 5 meetings per month.
- Legal CRM · 50 clientsManage your client portfolio with organized legal files: documents, communications, deadlines, hours and invoicing in one place. Up to 50 clients.
- Invoicing + VeriFactu (AEAT)Issue professional invoices and submit them to the AEAT via VeriFactu. Full compliance with the Anti-Fraud Act from day one.
- Time trackingTrack time spent on each case with an integrated timer. Generate hour reports for clients and monitor case profitability.
- Voice & chat agent · 30 min/monthYour firm has an AI agent that handles calls and messages via WhatsApp, web and social media outside your hours. 30 minutes per month included.
- Integrated legal calendarView all your deadlines, hearings, meetings and tasks in a unified calendar. Legal holidays for all regions included.
- Firm knowledge base · 10 docsStore up to 10 internal firm documents (templates, protocols, standard contracts) that the AI assistant uses to personalize its responses.
- Client intake form · 1 linkCreate a web form for potential clients to contact you. Data automatically flows into the CRM as a new file. 1 active link.
- Smart global searchSearch across all your cases, documents, clients and case law from a single field. Find any information in seconds.
- LexNET preparationThe system organizes and verifies documents needed for electronic submissions via LexNET: format, size and technical requirements.
- Email supportAccess to the support team by email with a response time of 24-48 business hours.
14-day free trial · cancel anytime
Professional
14-day guaranteeFor lawyers who want more
- Priority access to AI ChatMaximum processing priority, faster response times and early access to new AI features.
- Document analysis · 100/month ↑ from 20Analyze up to 100 documents per month: contracts, judgments, briefs, expert reports.
- Unlimited legal writing ↑Create any number of legal documents without limit: complaints, appeals, contracts, opinions.
- Deadline alerts via WhatsApp/SMS ↑Deadline alerts sent directly to your WhatsApp and by SMS, in addition to email.
- Adversarial Analysis unlimited ↑ from 5/moUnlimited opposing strategy analysis. Identify weak points before filing.
- Unlimited declaration prep ↑Prepare unlimited depositions, statements and expert reports. Cross-examination simulator included.
- AI contract analysisDeep contract analysis: abusive clauses, hidden risks and contractual imbalances.
- Escribano AI · 30 meetings/month ↑ from 5Record and transcribe up to 30 monthly meetings. Extracts facts, commitments and deadlines.
- Legal CRM · unlimited clients ↑Full client management without limits. Communication history and profitability panel per client.
- Invoicing · full compliance ↑Invoicing with automatic AEAT submission, VAT management, pro-formas and payment reminders.
- Time tracking by task and case ↑Detailed time records by task, case and client. Exportable reports.
- Voice & chat agent · 120 min/month ↑ from 30120 monthly minutes of automatic voice and chat service. Captures prospect data.
- Procedure Engine (LEC workflows)Step-by-step civil procedure guide per LEC. Required documents, deadlines and actions.
- Electronic signatures · 10/monthLegally valid e-signatures across the EU (eIDAS). 10/month. No additional app required.
- Firm knowledge base unlimited ↑ from 10Store unlimited internal documents: templates, models and precedents. AI learns your style.
- Customizable client intake form ↑Branded form with custom fields and conditional logic. Integrated with CRM and calendar.
- Daily AI briefingEach morning: today's deadlines, case law updates for active cases and BOE alerts.
- Calendar + Google/Outlook ↑Two-way sync with Google Calendar and Microsoft Outlook.
- Document OCRConvert scanned documents or photos into editable, searchable text.
- Automatic BOE alertsAutomatic alerts when BOE publishes regulations relevant to your practice areas.
- Priority support 24h ↑Guaranteed response in under 24 hours, including weekends. Live chat during business hours.
14-day free trial · cancel anytime
Team
For teamsPer user · Min. 2 · For law firms
- Everything in Professional, plus:Includes all Professional plan features for every team member, plus collaboration and management tools specific to law firms.
- Document analysis · unlimitedNo document limit per month for the whole team. Share analyses between members and maintain a central repository of processed documents.
- Shared cases and documentsGenerated documents, active procedures and templates are visible and editable by all authorized team members in real time.
- Escribano AI · unlimitedUnlimited meeting recording and transcription for the whole team. Minutes are linked to the file and accessible by all authorized members.
- Shared CRM for the whole teamA unified CRM where all lawyers see the full client portfolio. Role-based access control so each lawyer sees only their matters or all firm matters.
- Team management panelExecutive dashboard for the managing partner: workload by lawyer, active cases, revenue generated, hours worked and team productivity in real time.
- Role-based access controlDefine who can see what within the firm: managing partner, lawyer, trainee, admin. Granular control over access to clients, documents and features.
- Voice & chat agent · 300 min/user300 AI agent minutes per user per month. The agent handles client queries, routes to specific lawyers by subject and generates attendance reports.
- Electronic signatures · unlimitedUnlimited electronic signatures for the whole team. Ideal for firms with high volumes of contracts, powers of attorney and engagement documents.
- Shared Procedure EngineThe firm's procedure library is accessible to the whole team. Partners create custom workflows that all lawyers can reuse.
- Risk analytics per casePredictive risk analysis per matter: probability of success based on similar case law, estimated process duration and economic risk quantification.
- Firm performance analyticsFirm productivity reports: revenue vs hours, profitability by area, lawyer comparisons and monthly objective tracking.
- Client messaging portalSecure, encrypted communication channel with your clients, integrated in the platform. Clients send messages and documents without using email.
- Client document requestsSend the client a list of documents needed for their case. The client uploads them directly to the portal and they link automatically to the file.
- Customizable rate cardsDefine custom rates by matter type, urgency or client. The system applies them automatically when generating invoices and quotes.
- Multiple billing profilesIf the firm operates under multiple brands or entities, configure each profile with its own tax data, logos and billing terms.
- Onboarding & training includedPersonalized onboarding session: firm setup, data import and initial training for all team members.
- Dedicated 24/7 supportA dedicated account manager available 24/7. Direct access by phone, WhatsApp and video call for urgent incidents.
No commitment · Response in 24h
* Voice agent + multichannel chat powered by our reference partner in conversational AI
AgenteUno.aiThe interface language does not change the legal corpus jurisdiction. If you work in Spain with international clients, you can use Lexiel in English with the Spanish law corpus. Court filings are always generated in your jurisdiction's official language.
Frequently asked questions
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