⚡ Quick Verdict:
- 価格: Altered starts at $30/month vs NaturalReader at $49/month.
- 最適な用途: Altered for voice creators and media production; NaturalReader for reading documents aloud.
- 主な違い： Altered focuses on voice cloning and morphing. NaturalReader focuses on reading text aloud.
- Our pick: Altered for most creators — it offers more voice tools at a lower price.
NaturalReader and Altered both work with voices and audio.
しかし、それらは全く異なる問題を解決する。
NaturalReader reads your documents aloud in natural sounding audio.
Altered lets you clone voices and change how voices sound.
This guide breaks down both tools to help you pick the right one.
概要
This NaturalReader vs Altered comparison covers pricing, voices, key features, and ease of use.
We also break down who each tool works best for.
Our sources include published specs, documentation, and user reviews.
Our writers also spent hands-on time with each platform.
By the end, you’ll know which tool fits your needs.
Altered とは何ですか?
Altered AI is a specialized voice content creation platform.
It is designed for media production and audio storytelling.
The platform brings multiple voice AI technologies into one tool.
You get a voice changer, real time voice changer, and premium text to speech.
It also includes voice cloning, an AI voice cleaner, and a voice editor.
Most creators use it for podcasts, ゲーム, films, and video voiceovers.
🏆 Winner: Altered
Altered Studio is an advanced voice AI technology platform. It bundles voice cloning, voice morphing, TTS, and a real time voice changer in one place. Built for voice creators, podcasters, and game studios.
価格変更
Here is what Altered costs in 2026. Let’s break it down.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 無料 | 月額0ドル | Testing voice tools |
| クリエイター | 月額30ドル | Solo voice creators and podcasters |
| プロ | 月額90ドル | メディア制作チーム |
Pricing verified May 2026.
無料トライアル: Yes, a free trial of the Creator plan is offered on signup. No credit card required.
返金保証: Altered does not advertise a standard refund window. Cancel from the dashboard before renewal to avoid charges.
📌 注記： For larger Professional or Enterprise needs, you contact sales through the pricing page on the website. Custom plans cover bigger studios and game development teams.
⚠️ 警告： Audio files generated on free trials may have watermarks or usage limits. For full commercial use, you need a paid commercial license.
変更された主な利点
Here is what makes Altered worth considering:
- Rapid Voice Clone: Build a vocal identity from a short sample. The voice cloning technology shortens recording cycles for voice creators.
- 14種類の話し方： Pick from emotive styles like whispering and shouting. This flexible voicing supports dialogue for games and films.
- Real Time Voice Changer: Alter your voice live during voice chats and streams. Background noise is suppressed by the built in noise cancellation.
- AI音声クリーナー: Clean up voice recordings with one click. It removes background noise and restores clarity from messy audio content.
- 音声エディター: Edit voice performances inside the online audio editor. The user friendly interface lets you adjust tone and pacing fast.
- 文字起こしと翻訳: Transcribe audio and translate content into multiple languages. This pairs with custom voice models for global reach.
- 履歴編集: Track and revert to previous versions of your audio project. You can roll back without losing earlier voice edits.
What Our Team Noticed
Our writer signed up for Altered in 早い 2026 and spent several days inside Altered Studio. Here is what stood out:
変更された長所と短所
✅ メリット
- Bundles voice changer, TTS, voice cloning, and editor in one app
- 14 Speaking Styles add emotion to dialogue and audio storytelling
- Real time voice changer with effective noise cancellation
- User friendly interface that simplifies media production
❌ デメリット
- Built for creators, not for reading PDFs and physical text aloud
- Free plan limits export quality and file length
- Voice cloning needs careful consent to avoid misuse
NaturalReaderとは何ですか?
NaturalReader is a text to speech tool that reads documents aloud.
NaturalReader converts written text into natural sounding spoken audio.
It supports over 20 file types including PDF, DOCX, TXT, and EPUB.
The platform offers more than 1000 AI voices in over 100 languages.
You can use it through a chrome extension, mobile app, or online reader.
It is widely used by students, professionals, and people with learning disabilities.
🥈 Runner Up: NaturalReader
NaturalReader turns documents, web pages, and books into audio. It is built for reading, accessibility, and learning. Over 1 million people use it each month for personal and study work.
NaturalReaderの価格設定
2026年におけるNaturalReaderの価格はこうなります。詳しく見ていきましょう。
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 無料 | 月額0ドル | Testing basic reading features |
| シングルプラン | 月額49ドル | Personal use and full premium voices |
| チームプラン | 月額79ドル | Teams and small organizations |
Pricing verified May 2026.
無料トライアル: The free version is always available and does not require a credit card. You get unlimited free voices, 20 minutes per day of premium voices, and 5 minutes per day of plus voices.
返金保証: Yearly subscribers can request a refund within 30 days of purchase or renewal. Monthly subscribers have 14 days to request a refund.
📌 注記： NaturalReader has separate personal use versions and commercial use plans. The personal use plan covers private listening only. For YouTube videos, voiceovers, or any commercial use, you need NaturalReader Commercial with a commercial license.
⚠️ 警告： All subscriptions auto-renew at the end of the billing period. You can turn this off in your account. Cancelling does not automatically issue a refund — you must request it separately.
NaturalReaderの主な利点
Here is what makes NaturalReader worth considering:
- 幅広いファイルサポート: Reads over 20 file types including PDF, DOCX, TXT, and EPUB. It also reads emails, news articles, and Google Docs.
- 1000種類以上のAI音声： The newest and highest technology of AI voices in over 100 languages and dialects. Pick the voice that fits your content.
- Chrome拡張機能: The chrome extension reads webpages, YouTube descriptions, and online text. You can listen to any page directly in your browser.
- Speed & Accessibility: Reads up to 900 words per minute with dyslexia friendly fonts. Great for learners with reading-related learning disabilities.
- MP3 Audio Files: Download audio files as MP3 for offline listening. Audio files generated using NaturalReader Online are for personal use only.
- AIテキストフィルタリング： The unwanted text filter strips URLs, citations, and footnotes. You hear only the content that matters.
- NaturalReader EDU: NaturalReader EDU licenses serve over 2000 学校 and universities. The EDU package supports classrooms and 補助的な 学ぶ。
What Our Team Noticed
私たちの 作家 signed up for NaturalReader and used it for daily reading and study sessions. Here is what stood out:
NaturalReaderの長所と短所
✅ メリット
- Supports over 20 file types including PDF, DOCX, and EPUB
- Over 1000 AI voices across more than 100 languages and dialects
- Chrome extension reads webpages and YouTube videos directly
- Works across messaging systems, other systems, and most websites
- Strong accessibility features for dyslexia and ADHD readers
❌ デメリット
- Single Plan at $49/month is pricier than direct rivals
- Personal use plan does not allow commercial use of audio
- No real time voice changer or voice cloning for creators
機能比較
Ready to dive into a detailed comparison of NaturalReader vs Altered? We will explore the key features that decide which platform fits your needs. Each tool serves different users, so look at the side by side notes carefully.
| 特徴 | ナチュラルリーダー | 改変 |
|---|---|---|
| Starting Paid Price | 月額49ドル | 月額30ドル |
| 無料プラン | ✅ | ✅ |
| AI Voices Library | ✅ 1000種類以上の音声 | ✅ Portfolio TTS voices |
| 音声クローン | ❌ | ✅ |
| Real Time Voice Changer | ❌ | ✅ |
| Read PDFs and Documents | ✅ | ❌ |
| Chrome拡張機能 | ✅ | ❌ |
| モバイルアプリ | ✅ iOS & アンドロイド | ❌ |
| 文字起こしと翻訳 | ❌ | ✅ |
| AI音声クリーナー | ❌ | ✅ |
| 最適な用途 | 読書とアクセシビリティ | 音声コンテンツ制作 |
1. AI Voices and Voice Library
変更: Altered Studio offers a large voice library through its portfolio TTS voices. You can pick from many speech profiles and tones. Custom voice models are also supported for branded high quality voice content.
ナチュラルリーダー: NaturalReader provides over 1000 AI powered voices across more than 100 languages and dialects. Most of these voices are tuned for reading, study, and accessibility use cases. The newest and highest technology of AI voices is reserved for the Plus tier.
2. 音声クローン
変更: Voice cloning is a core feature inside Altered. Rapid voice clone builds a vocal identity from a short recording. This advanced voice ai technology is built for media production and voice content creation platform work.
ナチュラルリーダー: NaturalReader does offer voice cloning, but the focus is reading aloud. The cloning option is positioned for personal narration projects, not full media production. Most users stay on the standard preset voices for reading.
3. Text to Speech and Speaking Styles
変更: Premium text to speech includes 14 speaking styles like whispering and shouting. This emotive AI text to speech adds drama and flexibility to voice performances. It works well for dialogue, audio storytelling, and game scripts.
ナチュラルリーダー: NaturalReader’s text to speech technology focuses on clear, natural sounding audio. You can tweak speed and select different AI voices. There are no dramatic speaking styles, but the output is steady and easy to follow for long content.
4. Real Time Voice Changer
変更: The voice changer in Altered offers real time voice morphing for live calls and games. It works on voice chats across messaging systems and other systems. Noise cancellation cleans up background noise during sessions.
ナチュラルリーダー: NaturalReader does not offer a real time voice changer. It is built for reading, not live voice alteration. If voice puppeteering or live morphing is your goal, this tool is not the right fit.
⚠️ 警告： Voice changers can be misused. Always disclose AI voice use where required and respect platform rules during voice chats.
5. Reading Files and Document Support
変更: Altered is not built to read PDFs or physical text directly. Its focus is voice creation and audio production. You feed in scripts inside the editor rather than upload large files for reading.
ナチュラルリーダー: NaturalReader supports over 20 file types. You can convert any text, PDF, image, webpage, and physical book into audio. Documents like DOCX, EPUB, and TXT all play in the online reader.
6. Chrome Extension and Web Reading
変更: Altered does not ship a public chrome extension for web reading. Workflows live inside Altered Studio’s online audio editor. This is fine for creators but limiting for casual browser use.
ナチュラルリーダー: NaturalReader has a chrome extension that reads any page in your browser. You can listen to news sites, YouTube videos descriptions, blog posts, and Google Docs. The extension also strips unwanted text such as URLs and footnotes.
7. Mobile App and Cross Platform Use
変更: Altered is primarily a desktop and web app for the developer and creator workflow. It is not focused on a polished mobile reading experience. Most users build voice content on a computer with strong audio gear.
ナチュラルリーダー: NaturalReader has mobile apps for iOS and Android. You can continue listening across devices with a single account. This makes NaturalReader friendly for commuters, students, and busy professionals.
8. AI Voice Cleaning and Audio Editing
変更: The AI voice cleaner is a standout tool inside the platform. It removes background noise and restores voice recordings to a clean state. The next generation audio editor also handles fine voice editing inside the same app.
ナチュラルリーダー: NaturalReader does not include a noise cleaning tool or full audio editor. It is meant to generate audio files from text rather than fix existing recordings. For voice editing, creators look elsewhere.
9. Use Cases and Target Users
変更: Altered serves podcasters, video game publishers, and film production teams. It is built for human talent who want speed without losing creative control. The platform also supports voice editing, audio storytelling, and online audio editor work.
ナチュラルリーダー: NaturalReader serves students, professionals, and people with learning disabilities. NaturalReader EDU licenses extend the same tool to schools and universities. The personal version is strictly for individual listening, while NaturalReader Commercial covers content creators who need a commercial license.
10. 価格設定とコスト
Let us compare the pricing plans side by side. The two products price their tiers very differently.
| プラン | ナチュラルリーダー | 改変 |
|---|---|---|
| 無料 | 月額0ドル | 月額0ドル |
| 入場料支払い済み | 月額49ドル（シングルルーム） | 月額30ドル（クリエイター向け） |
| 上位ティア | 月額79ドル（チームプラン） | 月額90ドル（プロフェッショナルプラン） |
変更: The Creator plan starts at $30/month and gives voice creators access to most tools. The Professional plan at $90/month is built for media teams and bigger projects. The free tier is enough to test core voice features.
ナチュラルリーダー: The Single Plan at $49/month unlocks the newest and highest technology of AI voices for one person. The Team Plan at $79/month covers small teams under one account. The free version is generous for casual reading but limits premium voices and plus voices.
さまざまなシナリオ
| 必要な場合は | 選ぶ | なぜ |
|---|---|---|
| 予算が限られている | 改変 | $30/month vs $49/month entry tier |
| 音声クローン | 改変 | Rapid voice clone built in |
| Read PDFs aloud | ナチュラルリーダー | Supports 20+ file types |
| Real time voice changer | 改変 | Live voice morphing for chats |
| Dyslexia and accessibility | ナチュラルリーダー | 学習障害のある人向けに設計されています |
| モバイルリスニング | ナチュラルリーダー | iOS and Android apps included |
| メディア制作 | 改変 | Voice editor プラスAI voice cleaner |
💰 あなたの予算
Altered is the cheaper option at $30/month. If you only need to listen to a few articles a week, the free version of NaturalReader may be enough.
🔌 あなたの技術スタック
NaturalReader fits browser and mobile workflows with its chrome extension and apps. Altered fits a creator stack with editing software and streaming tools for voice chats.
📝 あなたのユースケース
Pick NaturalReader if you mainly read documents, articles, and study material. Pick Altered if you make podcasts, YouTube videos, or game audio.
🎓 あなたの経験レベル
NaturalReader suits first time users and non technical readers. Altered has a steeper curve but rewards creators with deeper voice control.
🆓 無料トライアルとデモ
Both platforms offer a free plan with no credit card. Test each for a few days before you commit to a paid plan.
🛟 サポートオプション
NaturalReader has help docs, EDU support, and a long-running support team. Altered offers email and dashboard support, with extra help for Professional plans.
切り替えガイド
既にこれらのツールのいずれかをご利用ですか？切り替える場合、どのような変更が想定されますか？
🔄 AlteredからNaturalReaderに切り替えますか？
✅ 得られるもの：
- Reads PDFs, EPUB, DOCX, and 20+ other file types aloud
- Chrome extension for web pages and Google Docs
- Mobile apps with cross device listening
❌ 失うもの：
- Rapid voice cloning for branded media production
- Real time voice changer for live calls and gaming
- AI voice cleaner and voice editor inside one app
📋切り替え方法：
- Export any final audio files you need from Altered Studio
- Create a NaturalReader account and install the chrome extension
- Upload your PDFs and documents into the online reader
🔄 NaturalReaderからAlteredに切り替えますか？
✅ 得られるもの：
- Voice cloning for podcasts, audiobooks, and video voiceovers
- 14 speaking styles plus emotive TTS for dialogue
- Real time voice changer with noise cancellation
❌ 失うもの：
- Direct reading of PDFs and physical books
- Chrome extension for browser reading and news sites
- Mobile reading apps with offline MP3 downloads
📋切り替え方法：
- Save any MP3 downloads from your NaturalReader library
- Sign up for an Altered account on the website
- Upload a voice sample to train your first custom voice model
What Our Review Didn’t Cover
This comparison focused on individual creators, students, and small teams. We did not test large enterprise rollouts, deep API workflows, or full 安全 audits for either product. Voice cloning ethics and legal use vary by region, so we did not give specific legal guidance. If you are using either tool for high stakes commercial work, review the official terms and licensing pages first.
最終評決
| カテゴリ | 勝者 |
|---|---|
| 💰価格 | 改変 |
| 🎙️ 音声クローン | 改変 |
| 📖 Reading Documents | ナチュラルリーダー |
| ⚡ Real Time Voice | 改変 |
| ♿ アクセシビリティ | ナチュラルリーダー |
| 📱 モバイル体験 | ナチュラルリーダー |
| 🎬 Media Production | 改変 |
| 🏆総合優勝 | 改変 |
🏆 WINNER: ALTERED
Alteredは7部門中4部門で受賞した。
最適な用途: Voice creators, podcasters, game studios, and media production teams
NaturalReader and Altered are two very different products that share the word “voice.” NaturalReader is the better choice for reading, study, and accessibility. Altered is the better choice for creators who build voice content for a living.
NaturalReader shines when you want clean, natural sounding audio from documents, web pages, and physical text. If you are a 学生, a busy professional, or someone with reading-related learning disabilities, the chrome extension and mobile app are hard to beat.
Altered is the broader voice content creation platform. With voice cloning, voice morphing, multiple voice AI technologies, and a next generation audio editor under one roof, it is the better pick for media production. The $30/month entry price also gives more for less.
If you only need a clean reading voice for personal use, start with NaturalReader’s free version. If you create audio for an audience or work with voice performances, Altered is the better long-term home.
変化したものを比較すると、
Here is how Altered stacks up against other competitors:
改変 vs イレブンラボ
Alteredが勝利した試合： Real time voice changer, integrated voice editor, AI voice cleaner under one roof
ElevenLabsが勝利した点： Wider voice library, larger developer community, more language coverage for synthesis
改変 vs マーフAI
Alteredが勝利した試合： Voice morphing, real time use during voice chats, deeper rapid voice clone control
Murf AIが勝利した点： Studio style video voiceover workflow, easier team collaboration, more polished UI for marketers
改変 vs 説明
Alteredが勝利した試合： Live voice puppeteering, dedicated AI voice cleaner, lower entry price for solo creators
説明文が勝つ点： Full video editing on the same timeline, text-based editing of speech, screen recording built in
Altered と Speechify
Alteredが勝利した試合： Voice cloning for content creators, real time voice changer, transcription and translation features
Speechifyが勝利した点： Browser-first reading workflow, polished mobile reading app, stronger learning use case
NaturalReaderの比較をもっと見る
Here is how NaturalReader stacks up against other competitors:
NaturalReaderとSpeechifyの比較
NaturalReaderが優れている点： Broader file format support, OCR camera scanner for physical text, dedicated EDU licensing
Speechifyが勝利した点： Slicker mobile interface, faster onboarding, stronger brand awareness with celebrity voices
NaturalReader vs Murf AI
NaturalReaderが優れている点： Reading PDFs and study material aloud, chrome extension for daily use, accessibility tools for dyslexia
Murf AIが勝利した点： Video voiceover studio, project-based editor, cleaner output for marketing assets
NaturalReader vs リードスピーカー
NaturalReaderが優れている点： Direct consumer apps, low cost personal use plan, larger free tier for casual readers
ReadSpeakerが優れている点： Enterprise website TTS embedding, deep developer APIs, stronger compliance options
NaturalReader vs Play.ht
NaturalReaderが優れている点： Reading focus, mobile app for daily listening, accessibility features for learners
Play.htが勝利した点： Voice cloning at scale, ポッドキャスト hosting features, more developer-style API access
よくある質問
NaturalReaderは無料で利用できますか？
Yes. The free version gives you unlimited use of free voices, 20 minutes per day of premium voices, and 5 minutes per day of plus voices. It requires internet but no credit card.
NaturalReaderの料金はいくらですか？
The Single Plan is $49/month, and the Team Plan is $79/month. There is also a free tier with daily limits on premium voices for personal use.
Altered AIは無料ですか？
Altered offers a free plan and a free trial of the Creator plan on its website. Paid plans start at $30/month for Creator and $90/month for Professional. Larger studios contact sales for custom pricing.
あなたの声を加工するAIとは何ですか？
Altered Studio is a leading platform for voice alteration. It bundles voice morphing, voice cloning, real time voice changer, and AI voice cleaner in one interface. ElevenLabs and Descript are alternatives.
Which tool is better for reading PDFs and study materials?
NaturalReader is the clear pick. It reads over 20 file types and includes a chrome extension, mobile apps, and EDU licenses for schools. Altered is built for voice content creation, not document reading.
English 
Spanish 
Chinese 
German 
French 
Arabic 
Russian 
Portuguese 
Japanese 
Korean 
Italian 
Turkish 
Dutch 
Polish 
Indonesian 
Thai 
Vietnamese 