⚡ 簡単な評価:
- 価格: Speechify runs $0 to $29/month. Altered runs $0 to $90/month.
- 最適な用途: Speechify for listening to documents. Altered for producing voice content.
- 主な違い： Speechify reads your files aloud. Altered records, clones, and edits voice performances.
- 私たちのおすすめ： Speechify, because most readers want playback, not a studio.
Both apps turn written text into spoken words.
Only one of them was built for reading.
Speechify is a text to speech reader for books, emails, and pdf files.
Altered AI is a voice content creation platform aimed at media production.
That one difference decides which app belongs on your device.
概要
This Speechify vs Altered comparison covers pricing, voice options, and ease of use.
It also covers who each app actually serves.
情報源としては、公開されている仕様書、製品ドキュメント、G2のレビューなどが挙げられます。
弊社のライター陣も、両方のツールを実際に使ってみました。
それらのメモは、以下の「チームが気づいたこと」のセクションに記載されています。
Speechifyとは何ですか?
Speechify is a text to speech app for everyday reading.
It turns written text into audio you can play anywhere.
The app reads pdf documents, articles, emails, and web pages aloud.
Speechify lets you set the voice, speed, and pitch through simple customizable options.
Optical character recognition lets it handle printed text from a photo.
The founder built the first version to manage his own dyslexia.
It now serves people with reading disabilities such as dyslexia and ADHD.
Here is a walkthrough of how the app handles a real document.
🏆 受賞者：Speechify
Listen to books, emails, and reports at up to 900 words per minute. The free plan lets you test playback before you pay.
Speechifyの価格
Speechify costs nothing to start. Here are the current plans.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 限定 | 月額0ドル | Testing the basic version |
| 年間 | 月額11.58ドル | Daily readers who commit for a year |
| 毎月 | 月額29ドル | Short projects with no lock-in |
Pricing verified September 2026.
無料トライアル: Yes. New accounts get a 3-day premium trial with card details on file.
返金保証: Refunds are handled case by case through support, not by a published window.
📌 注記： The Speechify Limited plan gives you non HD voices and a daily cap. HD voices, faster reading speed, and a 150,000-word monthly allowance sit behind Speechify Premium. Additional features such as AI summarization sit on the paid tier too.
⚠️ データ conflict: Our CSV lists a $29 monthly subscription and $11.58/month annual billing. Public research summaries claim $139 per year with no monthly option. The annual figure matches ($11.58 × 12 = $138.96), but we could not reconcile the monthly plan. Speechify pricing also varies from country to country. Check the checkout page for your region.
Speechifyの主なメリット
Here is what makes the app worth a look.
- Reads almost any source: You simply upload a file, paste a link, or scan a page. It handles pdf files, emails, and study material.
- OCR reader for paper: Point your camera at physical books and it converts printed pages into an audio file.
- Adjustable reading speed: Playback stretches to 900 words per minute. The average reading speed sits near 250.
- Text highlighting in sync: Words light up as they play. Academic research links dual input to better retention.
- Runs everywhere: An iOS app, an アンドロイド app, and a Chrome extension keep your Speechify library in sync.
- Built for accessibility: Listening reduces mental fatigue for auditory learners and anyone who struggles with dense digital content.
私たちのチームが気づいたこと
私たちの 作家 used the app for a week of reports and research papers. Here is what stood out during that time.
Speechifyの長所と短所
✅ メリット
- Reads pdf documents, emails, and printed pages with one workflow
- Playback reaches 900 words per minute for fast listeners
- Text highlighting keeps your eyes on the line being read
- Over 60 languages and more than 1,000 voice options
- Free plan and 3-day trial let you test before paying
❌ デメリット
- Reviewers call the price steep next to cheaper rivals like MicMonster
- Voices sound clear but miss the emotion of human narration
- The free version has limited features and non HD voices
- No voice cloning or audio editing for creators
Altered とは何ですか?
Alteredは、メディア制作のための音声コンテンツ作成プラットフォームです。
The desktop and web app is called Altered Studio.
It packs multiple voice AI technologies into one interface.
You get a Voice Changer, premium text to speech, voice cloning, and an AI Voice Cleaner.
The company pitches it as a next generation audio editor.
Podcasters, game publishers, and film studios are the target buyers.
The walkthrough below shows the editor handling a full session.
Runner Up: Altered
Clone a voice, morph a take, and clean the audio in one editor. A free trial of the Creator plan is open on the website.
価格変更
Three tiers cover hobby work through studio work.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 無料 | 月額0ドル | Trying the voice changer |
| クリエイター | 月額30ドル | Solo podcasters and voice creators |
| プロ | 月額90ドル | Studios and game development teams |
Pricing verified September 2026.
無料トライアル: Yes. You can sign up for a Creator plan trial on the Altered website.
返金保証: None published. Professional and Enterprise terms are quoted on the pricing page.
📌 注記： The paid tiers unlock custom voice models, transcription, and translation. Enterprise buyers are asked to request a quote rather than pay a list price.
⚠️ 警告： The entry paid tier costs more than double Speechify’s annual rate. Budget for render minutes too, since cloning and morphing burn through them faster than plain narration.
変更された主な利点
These are the reasons studios pick it up.
- One editor, many engines: Voice morphing, cloning, and cleanup share a single timeline. That cuts app switching during media production.
- 高速音声クローン： A short sample builds a usable model. The voice cloning technology copies a vocal identity without booking human talent again.
- 14種類の話し方： Emotive text to speech covers whispering through shouting. Dialogue stops sounding flat.
- リアルタイム音声変換機能： Live morphing works in voice chats with noise cancellation running underneath.
- AI音声クリーナー： Background noise gets stripped from raw voice recordings before you export audio files.
- 履歴編集: Track versions of a project and roll back to an earlier take.
私たちのチームが気づいたこと
Our writer cloned a voice and re-cut a short narration script. Here is what came out of that session.
The clip below covers the same session from the editor’s side.
変更された長所と短所
✅ メリット
- Cloning, morphing, and cleanup live in one online audio editor
- Ultra-low latency morphing works during live calls and gaming
- Custom voice models plus transcription and translation
- Game developers and podcast producers rate it well in reviews
❌ デメリット
- No document reader, no OCR, and no mobile listening app
- Entry paid plan starts at $30/month
- Cloning someone else’s voice raises consent and copyright questions
機能比較
These two products overlap on one thing only: they both speak. Everything after that splits apart. Here are the ten key features that decide the pick.
| 特徴 | スピーチファイ | 改変 |
|---|---|---|
| Starting paid price | 月額11.58ドル | 月額30ドル |
| 無料プラン | ✅ | ✅ |
| Document reading (PDF, email, web) | ✅ | ❌ |
| OCR for printed text | ✅ | ❌ |
| AI音声クローン | ✅ | ✅ |
| リアルタイムボイスチェンジャー | ❌ | ✅ |
| Audio editing and cleanup | ❌ | ✅ |
| Mobile app and Chrome extension | ✅ | ❌ |
| 最適な用途 | Reading and listening | Voice production |
1. Voice Library and Voice Options
スピーチファイ： The catalogue runs past 1,000 voice options, and you can adjust speed and pitch on each one. Converting text into audio takes one tap, and the paid tiers serve high quality voices. Premium voices sound close to human like voices. The free tier serves non HD voices, which are flatter but perfectly usable for skimming.
変更: The extensive voice library is smaller in raw count but tuned for performance work. Portfolio TTS voices cover narration and character reads, and 14 speaking styles change delivery from a whisper to a shout.
2. AI音声クローン
スピーチファイ： Cloning exists, but it is a side feature. You record a sample and the app reads your documents back in that voice. It is a novelty for readers rather than a production tool.
変更: AI voice cloning is the core product. Rapid Voice Clone turns a short sample into a reusable model, and the result carries the source vocal identity across a whole script. Studios use it to cut re-record sessions.
⚠️ 警告： Clone your own voice or one you have written permission to use. AI-generated audio raises live legal questions about authorship and copyright.
3. Voice Morphing and Live Changing
スピーチファイ： There is no voice changer here. The app plays a chosen voice and stops there. Nothing morphs your own microphone input.
変更: Voice morphing swaps character, accent, and style on a finished take. The real time voice changer runs with low enough latency for live voice chats and gaming, with noise cancellation applied on the way through.
4. Document Import and OCR
スピーチファイ： This is where Speechify stands alone. You can import text by copy-paste, file upload, or a web link. The app’s ability to scan a page with your camera turns physical books into playable audio.
変更: There is no ocr reader and no document library. You paste a script or upload an audio file. Reading a PDF aloud is simply not what the tool is for.
5. 言語と翻訳
スピーチファイ： More than 60 languages are supported, so language learners can hear a passage in a different language while reading the original. AI dubbing pushes the same idea into video.
変更: The platform transcribes audio and translates content into multiple languages inside the same project. That suits dubbing a game build across different languages more than casual study.
6. Audio Editing and Cleanup
スピーチファイ： Text editing is available before playback, so you can fix a typo the narrator would trip on. Post-production audio editing is absent.
変更: Voice editing sits at the centre. The AI Voice Cleaner pulls background noise out of raw takes, and the Voice Editor reshapes delivery line by line for audio storytelling.
7. Custom Voice Models
スピーチファイ： You pick from the shipped catalogue. There is no training pipeline for building a house voice from scratch.
変更: Voice Training builds custom models you own and reuse. Voice puppeteering lets you act a line out and map that performance onto a different voice, which keeps voice performances consistent across episodes.
8. Reading Speed and Listening Experience
スピーチファイ： Speed runs to 900 words per minute, and text highlighting tracks the audio in real time. Offline playback covers commutes, allowing users to keep going without a signal. The listening experience is the whole product.
変更: Output is a finished file you play elsewhere. There is no reading queue, no highlighting, and no speed slider for consumption.
9. Platforms and Developer Access
スピーチファイ： iOS, an Android app, a Chrome extension, and API access cover most workflows. The user friendly interface is the same across all of them.
変更: Work happens in Altered Studio on desktop and web. There is no phone app for casual use, which is fair for a studio tool.
10. 価格設定とコスト
Here are both ladders side by side.
| ティア | スピーチファイ | 改変 |
|---|---|---|
| 無料 | Limited — $0/month | Free — $0/month |
| 入場料支払い済み | Annual — $11.58/month | Creator — $30/month |
| 最高級 | Monthly — $29/month | Professional — $90/month |
スピーチファイ： The annual route is the cheapest way in at $11.58/month. Paying month to month costs $29 instead, so the yearly commitment saves real money if you read daily.
変更: Creator at $30/month is professional software priced for professional output. Nobody buys this to listen to email. It earns its keep when a clone replaces a booked session.
さまざまなシナリオ
| 必要な場合は | 選ぶ | なぜ |
|---|---|---|
| To get through more reading | スピーチファイ | Playback, OCR, and offline listening |
| To produce voiceovers | 改変 | Cloning, morphing, and cleanup |
| The lowest paid price | スピーチファイ | $11.58 vs $30 per month |
| A live voice changer | 改変 | Low-latency morphing for calls |
| Study support on mobile | スピーチファイ | Phone apps plus browser add-on |
| Custom voices you own | 改変 | Trainable models, not a fixed catalogue |
💰 あなたの予算
Speechify offers the cheaper entry at $11.58/month on annual billing. Altered’s premium subscription plans start at $30 and climb to $90.
🔌あなたのワークフロー
If your work arrives as documents, the Speechify app fits your day to day life. If it arrives as raw audio content, Altered fits better.
🎙️ Your Output
Speechify’s job is to convert text you already have into playback. Altered’s job is high quality voice content that ships to an audience.
🎓 あなたの経験レベル
Speechify needs no training. Altered’s advanced voice AI technology assumes you already know what a clean take sounds like.
🆓 無料トライアルとデモ
Both run a free tier plus a trial of the paid tier. Load a real file into each before you commit money.
🛟 サポートオプション
Speechify leans on help docs and email for a large consumer base. Altered handles Professional and Enterprise buyers directly through its pricing page.
切り替えガイド
Already paying for one? Here is what changes if you move.
🔄 SpeechifyからAlteredに切り替えますか？
✅ 得られるもの：
- A live voice changer and morphing for finished takes
- Noise removal and line-level editing in one place
- Trainable custom models for a repeatable professional voice
❌ 失うもの：
- Document playback and your saved reading queue
- Camera scanning of printed pages
- Phone and browser access for listening on the move
📋切り替え方法：
- Export any audio files you want to keep
- Start the Creator trial on the Altered website
- Record a clean sample and train your first model
🔄 AlteredからSpeechifyに切り替えますか？
✅ 得られるもの：
- A reader that handles pdf files, email, and web pages
- Scanning that turns paper into playable audio
- About $18 back every month at the entry tier
❌ 失うもの：
- Real-time morphing during calls and streams
- Cleanup tools for messy recordings
- Ownership of trained voice models
📋切り替え方法：
- Download your finished exports from the studio
- Create a free account and install the mobile or browser version
- Upload a document and set your reading speed
私たちのレビューで取り上げられなかったこと
We looked at individual and small-team use on the September 2026 versions. We did not test Enterprise contracts, bulk seat licensing, or API load at scale. Accessibility certification and screen-reader compatibility were outside our scope, and regional pricing differences mean your checkout total may not match ours.
最終評決
| カテゴリ | 勝者 |
|---|---|
| 💰価格 | スピーチファイ |
| 📚 文書閲覧 | スピーチファイ |
| 🎙️ 音声クローン | 改変 |
| 🎚️ 音声編集 | 改変 |
| 👶 使いやすさ | スピーチファイ |
| 📱プラットフォームカバレッジ | スピーチファイ |
| 🏆総合優勝 | スピーチファイ |
🏆 受賞者：SPEEPHIFY
Speechify wins 4 of 6 categories.
最適な用途: students, commuters, and anyone with a document backlog
Speechify wins because it fits more people, not because it does more. It is a popular app with a narrow job: convert text you already have into audio and get out of the way. Speechify users mostly want to save time, and it does that at $11.58/month. It enhances productivity in a boring, repeatable way.
Altered is the better product for a smaller room. If you sell voice work, the cloning, morphing, and cleanup stack is a powerful tool. For a studio it is also a valuable tool in plain money terms, since one avoided recording day covers months of subscription. Teams that want to enhance productivity across a slate of projects will feel that first.
Pick by output. Listening means Speechify. Publishing means Altered. Our full Speechify review covers the reading side in more depth.
Speechifyの比較
Here is how Speechify text to speech holds up against three close rivals.
Speechify vs ナチュラルリーダー
Speechifyが勝利した点： a faster 900 wpm ceiling, camera scanning of paper, and a mobile experience built for commuting.
NaturalReaderが優れている点： a more generous free plan, cheaper lifetime licensing, and simpler classroom deployment.
Speechify vs イレブンラボ
Speechifyが勝利した点： document import, offline listening, and an interface aimed at readers rather than engineers.
ElevenLabsが勝利した点： more natural sounding voices for publishing, deeper voice design controls, and stronger developer tooling.
Speechify vs マーフAI
Speechifyが勝利した点： reading whole pdf documents, browser and phone coverage, and a lower entry price.
Murf AIが勝利した点： studio timeline editing, voice-over sync with video, and team collaboration on scripts.
Across all three, the pattern holds. Rivals beat it on production polish. None of them match the reading experience. It stays the more versatile app for reading text in multiple languages on a phone.
変化したものを比較すると、
Altered is a versatile tool sitting in a crowded field of AI voices. Here is where it lands.
Altered vs ElevenLabs
Alteredが勝利した試合： live morphing during calls, speaking-style control for dialogue, and cleanup of existing recordings.
ElevenLabsが勝利した点： raw synthesis quality, a larger catalogue, and wider third-party integration.
改変 vs 説明
Alteredが勝利した試合： performance-driven puppeteering, low-latency changing, and character work for games.
説明文が勝つ点： full video editing, transcript-based cutting, and multi-editor project sharing.
Altered vs Play.ht
Alteredが勝利した試合： morphing your own take, noise removal, and version history across a project.
Play.htが勝利した点： lower entry pricing, faster batch narration, and a lighter learning curve.
よくある質問
Speechifyは本当に無料ですか？
Yes, the Limited tier costs $0/month. It carries limited features and non HD voices. Faster speeds and the 150,000-word allowance need a paid plan.
Speechifyの月額料金はいくらですか？
Our CSV lists $29 month to month, or $11.58 per month billed annually. Prices shift by country, so confirm at checkout before you subscribe.
Speechifyの無料版とプレミアム版の違いは何ですか？
The premium plan unlocks HD voices, higher speeds, and more advanced features. The basic version covers plain playback with a daily word cap.
Altered AIは無料ですか？
There is a free tier at $0/month plus a Creator trial. Paid access starts at $30/month and adds custom models, transcription, and translation.
Speechifyよりも優れたものは何ですか？
For reading documents, very little. For producing voice work, Altered, ElevenLabs, and Descript all beat it. Pick by what you are making.
English 
Spanish 
Chinese 
German 
French 
Arabic 
Russian 
Portuguese 
Japanese 
Korean 
Italian 
Turkish 
Dutch 
Polish 
Indonesian 
Thai 
Vietnamese 