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AI Services for Marketer that Solve "Lead and Closing Paragraph Creation"

An article's opening (the lead) and closing (the summary) shape both completion rate and whether readers take the next action, but they're often written last and rushed once the body copy is done. Here you can compare AI tools that support lead and summary writing.

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Japanese support only

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ライトソニック

Writesonic

An AI writing tool specialized in generating marketing content.

# コピーライティング# SEO# テキスト生成# AIチャットボット# AIエージェント

ジャスパー

Jasper

An enterprise AI writing platform for generating diverse content including marketing copy, ads, blog posts, and social media. Train it on your brand voice and product information to produce consistent copy at scale. Includes SEO optimization, collaborative team editing, and 100+ content templates.

# コピーライティング# SEO# テキスト生成# AIエージェント

コピードットエーアイ

Copy.ai

A writing AI that handles diverse text generation tasks, including social media posts, ad copy, and product descriptions.

# コピーライティング# SEO# テキスト生成# AIエージェント

ディープエル

DeepL

A high-accuracy machine translation service. Its neural translation engine delivers natural-sounding translations, making it one of the world's leading translation tools alongside Google Translate. Available as a web app, desktop app, and API, with document translation and a business tier, DeepL Pro. Supports 30+ languages including Japanese.

# 要約・翻訳# テキスト生成# 業務効率化# 生産性向上# 日本語対応

ジェミニ

Gemini

A multimodal AI developed by Google, capable of processing a wide range of information including search queries, images, and documents.

# 生成AI（LLM）# AIチャットボット# 要約・翻訳# テキスト生成# AIエージェント# 日本語対応

チャットジーピーティー

ChatGPT

A conversational AI developed by OpenAI. Using the latest models like GPT-4o and o3, it supports text, image, and voice conversations, file analysis, web search, and code generation and execution. 'Projects' enable custom instructions, while the Canvas feature enables collaborative editing of text and code. Widely integrated into external applications via API.

# 生成AI（LLM）# AIチャットボット# 要約・翻訳# テキスト生成# AIエージェント# 日本語対応

クロード

Claude

A conversational AI assistant developed by Anthropic. Handles a wide range of tasks including comprehending and generating long-form content, writing and reviewing code, and analyzing documents. Designed with safety (Constitutional AI) and honest responses as core principles. The latest Claude 4 model achieves top-tier benchmark performance in coding, mathematics, and reasoning. Available at claude.ai, via API, and through the Claude app.

# 生成AI（LLM）# AIチャットボット# 要約・翻訳# テキスト生成# AIエージェント# 日本語対応

ディファイ

Dify

An open-source AI development platform for building, deploying, and operating LLM applications. Includes a no-code visual workflow builder, RAG pipeline construction, AI agent orchestration, and prompt versioning. Usable by both developers and non-engineers. Available as self-hosted or cloud, with API integration support.

# AIチャットボット# AIエージェント# ノーコード自動化# API・SDK# 業務効率化# 日本語対応

キャンバ

Canva

A design creation tool that lets anyone easily create graphics and presentations using templates.

# デザイン生成# 画像生成# プレゼン・スライド生成# テキスト生成# 日本語対応

ワードチューン

Wordtune

An AI writing assistant focused on rephrasing and paraphrasing English text. Features include tone-aware rewriting, long-form summarization, AI-generated text, grammar checking, and a Humanize function to make AI-sounding writing feel more natural. Available as a browser extension and editor integration. Primarily English-focused; Japanese writing correction and rewriting are not practically supported.

# コピーライティング# テキスト生成# 要約・翻訳# 品質向上・クリエイティブ支援

ノーション

Notion

AI features built into Notion for document summarization, writing assistance, and automated meeting-note generation.

# テキスト生成# 要約・翻訳# ノーコード自動化# 通知・タスク連携# 業務効率化# 日本語対応

グーグルエーアイスタジオ

Google AI Studio

A free, developer-facing web tool for building and testing prototypes with Google's Gemini models. Provides an intuitive environment for prompt design, testing, and iteration, with seamless integration into production apps via the Gemini API. Supports multimodal input including text, images, audio, and video.

# 生成AI（LLM）# AIモデル構築・管理# API・SDK# AIエージェント

ムーンビーム

Moonbeam

An AI writing assistant specialized in long-form content creation. It produces high-quality essays, articles, and stories, with structural guidance and style customization features.

# テキスト生成

Articles popular with マーケター

【2026年版】マーケターの課題を解決するAIツール13選｜業務別にユースケースで紹介

コンテンツ制作・SNS運用・レポート作成など、マーケターの業務課題を解決する最新AIツールを分野別に厳選紹介。【2026年最新版】

【2026年版】マーケターの課題を解決するAIツール13選｜業務別にユースケースで紹介

No More Rushing to Write the Ending

Give AI the key points of your body copy, and it can quickly draft an engaging lead paragraph or a well-organized summary. The closing CTA in particular—directing readers to the next article or resource—tends to follow a predictable pattern, making it a good fit for AI-generated drafts.

Points Worth Comparing

How accurately it extracts key points after reading the full body copy
Whether it can use an appropriately different tone for the lead versus the summary
Whether it supports purpose-specific templates, such as CTA copy
How flexibly you can adjust the length of the generated output