Herramientas de IA para legal y redacción de contratos — Top 92 mejores opciones para 2026
Compara herramientas de IA que optimizan los flujos jurídicos — redacción de contratos, revisión legal, resumen de documentos y generación de términos y condiciones. Reduce la carga de trabajo de abogados y equipos legales mientras aceleras los procesos contractuales.
Top 92 opciones
Obsidian
A local-file-based knowledge management and note-taking app. Write in Markdown, visualize note relationships with bidirectional links and graph view. Extensible with AI via plugins.
ChatGPT
El asistente de IA conversacional más utilizado del mundo, desarrollado por OpenAI. Impulsado por GPT-5.4 Thinking, maneja una amplia gama de tareas incluyendo generación de texto, programación, análisis de datos y creación de imágenes/vídeos.
Claude
Un asistente de IA desarrollado por Anthropic con enfoque en seguridad y precisión. Cuenta con una ventana de contexto de 1 millón de tokens y potentes capacidades analíticas y de programación con Claude Opus 4.6/Sonnet 4.6.
Harvey AI
法律業界特化のAIプラットフォーム。契約書分析、法的リサーチ、デューデリジェンス、訴訟文書作成などリーガル業務をAIで劇的に効率化。ARR 1.9億ドル超の急成長企業。
LM Studio
A desktop application for running LLMs locally. Chat with AI models privately without internet connection, with support for thousands of open-source models.
Harvey AI
法律業界特化のAIプラットフォーム。契約書分析、法的リサーチ、デューデリジェンス、訴訟文書作成などリーガル業務をAIで劇的に効率化。ARR 1.9億ドル超の急成長企業。
Grammarly
Asistente de redacción en inglés impulsado por IA. Ofrece corrección gramatical y ortográfica junto con mejora de estilo, ajuste de tono y detección de plagio.
Napkin AI
Herramienta de creación de contenido visual con IA que genera automáticamente diagramas de flujo, diagramas e infografías simplemente ingresando texto.
Open WebUI
A self-hosted AI chat UI compatible with Ollama and OpenAI-compatible APIs. Capable of running fully offline.
Spellbook
SpellbookはMicrosoft Word上で動作するAI契約書レビューツール。契約書の条項分析、リスク指摘、修正提案をリアルタイムで提供し、法務業務を大幅に効率化。
Gemini
Una IA multimodal desarrollada por Google DeepMind. Impulsado por Gemini 3.1 Pro/2.5 Flash, comprende de forma integral texto, imágenes, audio y vídeo, con profunda integración con productos de Google.
Scribe
Herramienta de IA que graba operaciones del navegador y escritorio para generar automáticamente guías paso a paso con capturas de pantalla.
Ollama
An open-source tool for running LLMs locally on your PC. Complete privacy protection.
LegalOn
LegalOnはAI契約書レビュープラットフォーム。プレイブック機能で組織の契約ポリシーを反映した自動レビューを実現し、法務チームの品質と効率を同時に向上。
Intercom Fin
AI customer support agent by Intercom. GPT-4o-powered, it auto-answers customer questions and resolves 50%+ of support tickets instantly. Enterprise-grade AI support.
DeepL Write
An AI writing assistant by DeepL. Goes beyond grammar correction to refine tone, style, and phrasing with high precision.
Logseq
A privacy-first, open-source knowledge management tool. Structure your thinking in outliner format with bidirectional links and graph view for visualizing note relationships.
Notion AI
Un asistente de IA integrado en Notion. Realiza creación de documentos, resúmenes, traducción y lluvia de ideas de forma fluida dentro del espacio de trabajo de Notion.
Frase
An AI writing platform specialized in SEO and GEO (Generative Engine Optimization). Handles everything from SERP analysis to content generation and optimization.
Pandadoc AI
A document management platform that auto-creates contracts and proposals with AI. Also supports e-signatures.
DeepSeek
High-performance AI chat from China. Its reasoning model R1 rivals GPT-4o in capability.
Notion AI Q&A
Ask AI questions about your Notion workspace content. Instant internal knowledge search.
Qwen
A large language model developed by Alibaba Cloud. Open-source with world-class performance in multilingual support, coding, and mathematical reasoning.
Sider AI
Un asistente de IA integrado en el navegador como barra lateral. Accede a ChatGPT, Claude y otros modelos de IA directamente desde cualquier página web.
Google Gemma
Modelo de IA open source ligero de Google, ideal para aplicaciones móviles y edge computing.
Mistral AI
LLM de pesos abiertos desarrollado por una empresa francesa de IA. Ofrece modelos de alto rendimiento como Mistral Large y Mixtral, con la interfaz de chat Le Chat y APIs empresariales.
Doubao
ByteDance（TikTok親会社）が開発した中国発AIチャットボット。中国国内で最もユーザー数が多いAIアシスタントで、テキスト・画像・音声のマルチモーダル対応。
AnythingLLM
An all-in-one AI desktop app that runs locally. Integrates RAG, multi-LLM support, and document management to leverage AI while maintaining complete data privacy.
Originality AI
Industry-leading AI content detection and plagiarism checker. Detects text generated by ChatGPT, Claude, Gemini, and more with high precision. Essential for content marketers, publishers, and educators.
LanguageTool
An AI grammar and spell checker supporting 30+ languages. Automatically detects writing errors and suggests style improvements as a comprehensive writing assistant.
QuillBot
The leading AI paraphrasing tool. Rephrase text in 7 modes with integrated grammar checking, summarization, and translation for a complete writing assistant.
Reflect
A networked note-taking app with native AI integration. Features backlinks and graph view plus a GPT-4 based AI assistant for note summarization, organization, and Q&A.
Doubao
ByteDance（TikTok親会社）が開発した中国発AIチャットボット。中国国内で最もユーザー数が多いAIアシスタントで、テキスト・画像・音声のマルチモーダル対応。
Jasper AI
Una herramienta de redacción IA diseñada para marketing. Genera rápidamente contenido de marketing incluyendo publicaciones de blog, textos publicitarios y publicaciones en redes sociales.
Copilot (Microsoft)
Asistente de IA desarrollado por Microsoft. Integrado en Windows, Edge y productos Office, soporta desde tareas cotidianas hasta productividad empresarial.
Almanac
Plataforma de creación y gestión de documentos empresariales impulsada por IA. Agiliza la gestión de documentos en equipo con más de 3.000 plantillas y control de versiones tipo Git.
Anyword
An AI copywriting tool featuring predictive performance scores based on marketing data. Predicts ad copy effectiveness before publishing.
Writer
An enterprise AI writing platform. A corporate text generation and management tool focused on brand guideline compliance and security.
Poe
An AI chat platform by Quora. Access multiple AI models from a single app.
Tome
An AI tool that auto-generates presentations and documents. Create professional-quality materials from text input alone.
Coda AI
An AI-integrated document and project management tool that combines documents and databases.
Monica
A browser extension AI assistant. Use AI features on any web page.
Llama (Meta AI)
Open-source LLM developed by Meta. A high-performance AI model available for commercial use.
Tenbin AI by GMO
A platform by GMO that runs and compares multiple generative AI models simultaneously. Compare responses from up to 6 AI models on a single screen.
Jenni AI
An AI writing tool specialized for academic papers and reports. Supports researchers and students with automatic citation insertion, plagiarism checking, and academic style suggestions.
Jan
An open-source local AI chat app. Connect to GPT-4o and Claude via cloud APIs, or easily run local LLMs like Llama and Mistral through a beautiful GUI. Privacy-first design.
Lex
AI-powered minimalist writing editor. Unobtrusive AI completion and suggestions keep you in the writing flow. Perfect for long-form blog posts, essays, and fiction.
Tidio
AI-powered customer support chat platform. The Lyro AI chatbot auto-answers FAQs and handles inquiries, reducing support team workload by up to 70%.
Zendesk AI
AI features integrated into the Zendesk customer support platform. Automatic ticket classification, priority assignment, and AI agent auto-responses dramatically improve support efficiency.
Kickresume
AI-powered resume and cover letter builder with 35+ professional templates. Used by 8M+ job seekers worldwide for ATS-optimized applications.
Kimi
An AI chatbot developed by Moonshot AI with an ultra-long context window. It supports inputs of up to 2 million tokens, enabling analysis of and Q&A over massive document sets in a single session.
HyperWrite
An AI writing assistant. It automates content creation, rewriting, email drafting, and offers real-time writing suggestions directly in the browser — streamlining every writing task.
KoalaWriter
An AI blog writing tool built for SEO. Just enter a keyword and it automatically generates high-quality long-form articles optimized to rank in search results. WordPress integration included.
Writesonic
Plataforma de redacción de contenido impulsada por IA. Genera rápidamente contenido de marketing diverso incluyendo publicaciones de blog, textos publicitarios y descripciones de productos.
Copy.ai
Herramienta de copywriting IA para marketing. Genera rápidamente contenido de marketing incluyendo textos publicitarios, publicaciones en redes sociales y correos electrónicos usando IA.
Wordtune
An AI writing assistant from AI21 Labs specialized in text rewriting and improvement. Instantly transforms existing text into better expressions.
Hypotenuse AI
An AI content generation tool specialized for e-commerce. Automates bulk product description generation, SEO blog creation, and catalog management.
Character.AI
An AI chat service specializing in character conversations. Chat with AI personas of all kinds.
Le Chat (Mistral)
A high-performance chat assistant from Mistral AI. Powered by strong AI models from Europe.
Cohere Command R+
An AI platform designed for enterprises. Excels at RAG and retrieval-augmented generation.
Magical
An AI writing assistant that automates text input. Streamlines repetitive tasks.
Sudowrite
An AI tool specialized for fiction and creative writing. Powerfully supports story creation.
Beautiful.ai Docs
Automatically create visual documents with AI. Generate proposals and reports at professional quality.
Bunken
An AI-powered Japanese text proofreading and editing tool. Automatically checks for typos, expression improvements, and readability across 100+ check items.
Mapify
Una herramienta de IA que transforma automáticamente texto, URLs, videos de YouTube o PDFs en mapas mentales visuales y estructurados.
PopAi
Un espacio de trabajo IA todo en uno que combina chat, lectura de documentos, creación de presentaciones y generación de imágenes en una sola plataforma.
Replika
Compañero IA personal que aprende tus intereses y ofrece conversaciones personalizadas y apoyo emocional.
Type
Editor de documentos AI-first. Asistencia a la redacción con IA integrada GPT-4 para redactar, editar y reescribir contenido largo de forma eficiente.
Lex Page
Editor de escritura IA impulsado por GPT-4. Aprende el estilo del escritor y sugiere continuaciones de texto para una asistencia inteligente en la creación de contenido largo.
Cogram
Asistente de reuniones con IA. Transcripción automática, redacción de actas y extracción de acciones, con automatización del seguimiento posterior a la reunión.
Candy AI
Candy AIはAIコンパニオン・チャットプラットフォーム。ユーザーが好みのAIキャラクターを作成し、自然な会話や感情的なつながりを楽しめる対話型AIサービス。
GPT4All
An open-source AI chatbot that runs locally on your PC without internet. Use LLMs with complete privacy protection, entirely free of charge.
Mem
An AI-powered knowledge management tool that automatically organizes and connects your notes. Just write notes and the AI understands context, surfacing relevant information automatically.
Yi
A large language model developed by Chinese AI startup 01.AI. Open-source with strong multilingual capabilities and long-context processing.
Amazon Nova
Amazon's family of foundation AI models available through AWS Bedrock. Includes text, multimodal, and image generation models optimized for enterprise applications with strong price-performance.
Mem AI
An AI-powered note-taking app that automatically organizes, connects, and surfaces relevant notes without manual filing. Uses AI to turn unstructured notes into a searchable, intelligent knowledge base.
Rezi
ATS-optimized AI resume builder with keyword scoring and one-click generation from job postings. Maximize your chances of passing automated screening.
Apple Intelligence
Apple's on-device AI built into iPhone, iPad, and Mac. It offers practical AI features like Writing Tools, Image Playground, and an enhanced Siri — all with a privacy-first design.
Step Fun
An AI platform from StepFun (Jieyue Xingchen) powered by the Step-2 model. It offers multimodal capabilities including image understanding and generation, coding assistance, and competitive API pricing.
Pi
An emotionally intelligent conversational AI assistant developed by Inflection AI.
Grok
An AI chat assistant developed by xAI. Access real-time data from X (Twitter).
TextCortex
A multilingual AI writing assistant. Generate content in 25+ languages.
Catchy
One of Japan's largest AI writing assistant tools. Automatically generates ad copy, blog posts, social media content, and more with over 140 templates.
Cici AI
Un chatbot de IA desarrollado por ByteDance que ofrece conversaciones naturales, ayuda con la escritura, traducción y mucho más, todo gratis.
Tripnotes
Asistente de planificación de viajes con IA. Introduzca su destino, fechas, presupuesto y preferencias para generar automáticamente un plan de viaje óptimo.
Undetectable AI
AI humanizer that rewrites AI-generated text to read naturally as human-written. Bypasses AI detection tools while maintaining content quality and meaning.
Rytr
A cost-effective AI writing assistant with 40+ templates and 30+ language support. Specialized in short-form content creation.
Docuwriter.ai
Auto-generate code documentation with AI. A technical documentation tool for developers.
HuggingChat
An open-source AI chat platform by Hugging Face. Try various open-source models.
Value AI Writer byGMO
An SEO article generation AI writing tool by GMO Digirock. Automatically generates SEO-optimized articles from just a keyword input.
Hoppy Copy
An AI copywriting tool built exclusively for email marketing. Rapidly generate newsletters, drip sequences, subject lines, and all your email copy in seconds.
Cohesive AI
An AI content editor with 100+ templates. Rapidly generates and edits diverse content including blogs, social media posts, and scripts.