⚡ 簡単な評価:
- 価格: Speechify runs $0 to $29/month. TTSOpenAI charges $0.00004 per credit.
- 最適な用途: Speechify for reading PDF files and physical books aloud. TTSOpenAI for voiceovers and API work.
- 主な違い： Speechify has an OCR reader and cross-platform syncing. TTSOpenAI has a custom voice maker and API keys.
- 私たちのおすすめ： TTSOpenAI for most creators — it rates 4.3 and bills only for what you generate.
These two tools both turn written text into speech.
That is where the similarity stops.
Speechify is a reading app you listen to.
TTSOpenAI is a voice studio you export audio files from.
One saves you reading time. The other creates content for other people.
Pick the wrong one and you pay for features you never open.
概要
This Speechify vs TTSOpenAI comparison covers pricing, key features, and voice quality.
We also break down who each platform actually fits.
Our writers spent hands-on time with both accounts.
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。
Pricing and plan details come straight from each vendor’s current plans.
Speechifyとは何ですか?
Speechify is a text to speech app that turns written text into spoken words.
The founder built it as an answer to his own dyslexia.
It now helps tens of thousands of people with dyslexia, ADHD, low visual acuity, anxiety, and concussions.
Speechify reads PDF documents, articles, emails, and study material out loud.
Optical character recognition lets the OCR reader handle printed text and images too.
You can scan physical books with your phone and get audio back.
The Speechify app runs on iOS, an Android app, and a Chrome extension.
Under the hood it uses neural AI technology for converting text into audio.
Speechify lets you queue a document and listen while you cook or drive.
That is how it helps you save time on a heavy reading load.
プラットフォームが実際に動作している様子を詳しく見ていきましょう。
スピーチファイ
Listen to any document at up to 900 words per minute. Built for auditory learners and anyone with reading disabilities.
Speechifyの価格
Here is what Speechify cost looks like in 2026. Three tiers, one free.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 限定 | 月額0ドル | Testing the basic version with limited features |
| 年間 | 月額11.58ドル | Daily readers who commit for a year |
| 毎月 | 月額29ドル | Short-term use without a lock-in |
Pricing verified September 2026.
無料トライアル: Yes. New Speechify users get a 3-day trial of the paid tier.
返金保証: Refunds are handled case by case through support, not a fixed window.
📌 注記： Speechify Limited is the free tier name, and its word cap is the main gap. The premium plan covers roughly 150,000 words per month through premium voices. Speechify pricing also shifts by country, so your checkout total may differ.
⚠️ Pricing conflict flagged: Our research notes say Speechify sells one annual package near $139/year with no monthly subscription. Our CSV lists a separate $29/month tier. We publish the CSV figures above and recommend checking the checkout page before you buy.
Speechifyの主なメリット
Here is what makes this versatile tool worth a look:
- Speed you control: Push playback to 900 words per minute. That sits far above average reading speed for most adults, and customizable options let you fine-tune the listening experience.
- Text highlighting: Words light up in real time as they are read. Hearing and reading together improves recall, and academic research backs that up.
- Built for reading difficulties: It cuts the mental effort of decoding, so you focus on meaning instead.
- Offline listening: Save an audio file and play it with no signal. This enhances productivity by allowing users to keep working through a reading list on a flight.
- Wide language support: Over 60 languages with lifelike AI voices. Useful for language learners who study two different languages and switch to a different language mid-session.
- Flexible imports: Copy-paste, file uploads, web links, or a camera scan. You simply upload and press play.
- Study tools: On-repeat playback and note extraction help you drill one passage until it sticks.
私たちのチームが気づいたこと
私たちの 作家 signed up for Speechify and used it on research PDFs for several days. Here is what stood out from that hands-on time:
The screenshot below shows the reading interface our writer worked in.
Speechifyの長所と短所
✅ メリット
- OCR turns printed text and handwriting into audio
- Playback reaches 900 words per minute
- iOSで動作します。 アンドロイド、そしてChrome
- 無料プランでは、料金を支払う前に試用できます。
- Highlighting makes the reading experience easier to follow
❌ デメリット
- Costs more than rivals such as MicMonster
- Voices lack the emotion of human narration
- The free version is heavily capped
TTSOpenAIとは何ですか?
TTSOpenAI is a browser platform that turns just text into finished audio.
It runs on OpenAI voices built with deep-learning neural networks.
Those networks trained on huge sets of paired audio and text.
The result is natural sounding speech with real intonation and emphasis.
You pick a preset such as a calm read, a gentle tone, or a young male narrator.
Then you generate the clip and download an MP3.
Playback is smooth, and the platform offers enough control to sound deliberate rather than robotic.
Imagine a product demo where the narration matches your brand instead of a stock voice.
Developers can skip the interface and call the API instead.
This walkthrough shows the workflow end to end.
🏆 受賞者：TTSOpenAI
Studio-grade voiceovers in seconds, billed per credit. A free tier lets you hear the voice quality first.
TTSOpenAIの価格
There is no monthly subscription here. You buy credits and spend them.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 使った分だけ支払う | 1クレジットあたり0.00004ドル | Creators with uneven monthly volume |
Pricing verified September 2026.
無料トライアル: Yes. A free tier lets you log in and test the service before adding credit.
返金保証: None stated. Credits are prepaid, so buy in small amounts first.
📌 注記： Credit billing measures usage by characters processed. Short marketing clips cost pennies. A full audiobook is a different range entirely.
⚠️ データ gap flagged: Our CSV lists one pay-as-you-go rate. The vendor also references a free tier and different pricing plans for heavier accounts. We publish the CSV rate and suggest confirming bundle rates at checkout.
TTSOpenAIの主な利点
OpenAI keeps releasing updated audio models, so this is a moving target. Here is where the platform earns its rating right now:
- Two model options: TTS-1 is tuned for low latency. TTS-1-HD trades speed for high quality narration.
- Directable delivery: The gpt-4o-mini text to speech model takes plain instructions about tone, pauses, and pronunciation.
- Named voice set: Alloy, Nova, Onyx, and Shimmer cover most narration jobs without extra setup. For example, Nova suits explainer videos.
- カスタム音声: Neural cloning can build a unique voice from a sample as short as 60 seconds.
- Developer access: An API and API keys drop the same engine into apps, e learning courses, and voice agents that respond in real time.
- Clean exports: Every clip downloads as MP3, so you can drop it straight into a video timeline.
- Broad reach: Output is tuned for English but handles many other languages and accents.
私たちのチームが気づいたこと
Our writer created an account and ran short scripts through several presets. Here is what came out of that session:
The panel below shows the generation screen from that same session.
TTSOpenAIの長所と短所
✅ メリット
- Voices sound more professional grade than most rivals
- You pay per credit instead of a flat monthly fee
- Custom voice maker clones a voice from a short sample
- API keys let developers wire it into their own products
- A powerful tool for teams producing audio at volume
❌ デメリット
- Long projects burn credits fast and get expensive
- The interface is less beginner-friendly than リスト番号
- No OCR, so it cannot read printed pages
機能比較
Both tools convert text into audio. What they do around that job is where they split.
Below are ten key features side by side, starting with a scannable summary.
| 特徴 | スピーチファイ | TTSOpenAI |
|---|---|---|
| 開始価格 | 月額0ドル | 1クレジットあたり0.00004ドル |
| 無料プラン | ✅ | ✅ |
| OCRリーダー | ✅ | ❌ |
| 音声クローン | ✅ | ✅ |
| APIアクセス | ✅ | ✅ |
| モバイルアプリ | ✅ | ❌ |
| Chrome拡張機能 | ✅ | ❌ |
| MP3 Export | ✅ | ✅ |
| 最適な用途 | 文書を聞く | Producing voiceovers |
1. Voice Library and Voice Options
スピーチファイ： The Speechify library spans more than 1,000 voices across 60-plus languages. You can adjust speed and ピッチ per voice. Free accounts get non hd voices, while paid accounts unlock the hd voices and premium voices. Those high quality voices are the human like voices most people expect, and the gap between the tiers is obvious within a sentence.
TTSOpenAI: The catalogue is smaller but tuned. Alloy, Nova, Onyx, and Shimmer handle most narration, and each one reads with proper stress and phrasing. These are natural voices rather than flat ones, and there are fewer voice options with a higher hit rate.
2. 音声の複製とカスタム音声
スピーチファイ： Cloning is bundled into the wider app rather than sold as a studio product. It works, but the output is aimed at listening rather than publishing.
TTSOpenAI: Neural cloning builds custom voices from a sample as short as 60 seconds. Record a clean take with no background noise and the clone holds up across long scripts.
⚠️ 警告： Clone only voices you own or have written permission to use. Both platforms put that responsibility on your account.
3. Reading Printed Text and Documents
スピーチファイ： This is the app’s ability that nothing here matches. Optical character recognition reads printed text, typed pages, and handwriting. Point your camera at physical books and the OCR reader converts the page. PDF documents and PDF files work the same way.
TTSOpenAI: No scanning at all. It takes typed or pasted input only. If your source is a paper page, you type it first.
4. Text Input and Editing
スピーチファイ： You import text by copy-paste, file upload, or a web link. Text editing is light, since the app assumes your written text is already final.
TTSOpenAI: The Input Text Pro editor is the difference. You mark pauses, fix pronunciation, and pass plain instructions about tone. Ask for an expressive read or an energetic one and the model responds.
5. Long-Form and Story Projects
スピーチファイ： Long documents are the point here, but the output is playback. You listen to a book rather than produce one for an audience.
TTSOpenAI: Story Maker keeps a long script consistent across chapters. That matters for audiobooks, where a shift in tone between sections is obvious to listeners.
6. Video and Dubbing
スピーチファイ： AI Dubbing swaps the narration on a video into a different language. For a small marketing team pushing one clip into three markets, that saves a studio booking.
TTSOpenAI: No dubbing module. You generate an audio track and sync it in your own editor. More manual, more control.
7. API Access and Integration
スピーチファイ： An API exists and is documented. It is a side door to a consumer product, not the main entrance.
TTSOpenAI: Built for this. API keys, real-time streaming, and low-latency output make it a fit for voice agents that respond mid-conversation. Home アシスタント already uses the same underlying model as a speech provider.
💡 プロのヒント: Additional features like streaming only matter if you build. If you want an integration with an e learning course or an internal tool, test latency before you commit. TTS-1 is the low-latency model. TTS-1-HD sounds better but takes longer.
8. Language Support and Accents
スピーチファイ： Over 60 languages, which makes it a versatile app for language learners working across different languages. Switching mid-document takes two taps.
TTSOpenAI: Output is tuned for English first. It still handles multiple languages and a range of accents, though non-English quality varies more than the English voices do.
9. Ease of Use and Platforms
スピーチファイ： A user friendly interface across iOS, the Android app, and a Chrome extension. Cross-platform syncing means you start on a laptop and finish on a phone. Speechify stands out for people who read on the move.
TTSOpenAI: Browser only, with an easy to use interface once you know what the controls do. There is a learning curve at the moment you first open the customization panel.
10. 価格設定とコスト
Two different billing models, so compare by output, not by sticker price.
| プラン | スピーチファイ | TTSOpenAI |
|---|---|---|
| 無料 | 制限あり：月額0ドル | 無料プラン |
| 入場料支払い済み | 年間：月額11.58ドル | 従量課金制：1クレジットあたり0.00004ドル |
| Rolling paid | 月額料金：29ドル/月 | ❌ No monthly subscription |
スピーチファイ： Flat access. Speechify premium runs $11.58 a month on the annual commitment or $29 month to month. Premium subscription plans cover roughly 150,000 words monthly and add advanced features, so heavy readers get predictable costs. Speechify offers no cheaper middle tier, which is the main gap.
TTSOpenAI: Usage billing. A month with no projects costs nothing. A month of audiobook work costs more than any Speechify tier. Your volume decides which is cheaper.
さまざまなシナリオ
| 必要な場合は | 選ぶ | なぜ |
|---|---|---|
| To read scanned pages | スピーチファイ | Only one with OCR |
| Client voiceovers | TTSOpenAI | Cleaner exports, per-use billing |
| Occasional projects | TTSOpenAI | No monthly fee to waste |
| Daily study reading | スピーチファイ | Mobile apps and syncing |
| 開発者統合 | TTSOpenAI | API built for production |
| Support for dyslexia | スピーチファイ | Highlighting plus speed control |
💰 あなたの予算
A flat $11.58 a month beats credits once you listen daily. Sporadic users almost always spend less on credits.
🔌 あなたの技術スタック
If audio has to be integrated into software you already run, the OpenAI API is the safer bet. If you just want a reader on your devices, that 質問 does not apply.
📝 Your Source Material
Paper textbooks, receipts, and screenshots point to Speechify. Typed scripts point the other way.
🎓 あなたの経験レベル
Speechify asks almost nothing of a first-timer. TTSOpenAI rewards people willing to learn what each control changes.
🆓 無料トライアルとデモ
Both offer free testing. Run the same paragraph through each and judge the voice quality with your own ears.
🛟 サポートオプション
Speechify leans on in-app help and a knowledge base. Developer-side support is documentation-first, which suits technical accounts more than casual ones.
切り替えガイド
Already on one of them? Here is what changes.
🔄 SpeechifyからTTSOpenAIに切り替えますか？
✅ 得られるもの：
- Cleaner exports for published work
- Billing that stops when you stop working
- Direct control over pauses and emotion
❌ 失うもの：
- Camera scanning of paper pages
- Mobile apps and the browser extension
- Synced text highlighting while you listen
📋切り替え方法：
- Export or copy the scripts you still need
- Create an account and buy a small credit block
- Rebuild one project before cancelling your old plan
🔄 TTSOpenAIからSpeechifyに切り替えますか？
✅ 得られるもの：
- Scanning that reads paper and screenshots
- Offline playback on phone and tablet
- A predictable bill every month
❌ 失うもの：
- Fine-grained delivery instructions
- Story Maker consistency across chapters
- Production-grade API streaming
📋切り替え方法：
- Download any audio files you want to keep
- Start on the free plan and add your documents
- Upgrade only after a week of real use
私たちのレビューで取り上げられなかったこと
We focused on individual users and small teams. We did not measure output quality across every one of the supported languages, and we did not stress-test either API at production volume. Enterprise contracts and bulk credit rates sit outside this comparison. If you are shipping voice at scale, run your own benchmark before you sign anything.
最終評決
| カテゴリ | 勝者 |
|---|---|
| 💰価格 | TTSOpenAI |
| 🚀 主な機能 | スピーチファイ |
| 🎧 Voice Quality | TTSOpenAI |
| 📄 文書閲覧 | スピーチファイ |
| 👶 使いやすさ | スピーチファイ |
| 🔌 開発者ツール | TTSOpenAI |
| 🎙️ Content Production | TTSOpenAI |
| 🏆総合優勝 | TTSOpenAI |
🏆 優勝者：TTSOPENAI
TTSOpenAIは7部門中4部門で優勝した。
最適な用途: Voiceovers, audiobook narration, developer projects
These are not really competitors. They are two answers to different questions.
Speechify is a reading tool. It exists so you can get through more digital content in your day to day life without staring at a screen, and it does enhance productivity for people who read constantly.
TTSOpenAI is a production tool. It exists so other people can listen to what you make.
If you have dyslexia, ADHD, or a stack of papers to get through, Speechify is the more valuable tool and the higher rating goes out the window. Install Speechify today and skip the rest of this page.
Our full Speechify review digs deeper into the mobile apps if you want that detail.
For everyone else — creators, marketers, developers — TTSOpenAI produces better audio for less money, and that is why it takes the win.
Speechifyの比較
Here is how the popular app measures up against other names in the category:
Speechify vs ナチュラルリーダー
Speechifyが勝利した点： faster maximum playback, stronger mobile apps, cleaner scanning of physical pages
NaturalReaderが優れている点： cheaper entry tier, a more generous free allowance, simpler desktop app
Speechify vs イレブンラボ
Speechifyが勝利した点： document reading, OCR scanning, offline playback on mobile
ElevenLabsが勝利した点： emotional range in the output, finer cloning control, better fit for published narration
Speechify vs マーフAI
Speechifyが勝利した点： reading speed control, cross-device syncing, accessibility features for reading disabilities
Murf AIが勝利した点： timeline editing, background music beds, team collaboration on a shared project
TTSOpenAIの比較
And here is where the winner sits against its closest rivals:
TTSOpenAIが勝利した点： more natural delivery, tighter pronunciation control, lower cost on short clips
Listnrが勝利した点： over 600 voices across 75-plus languages, a friendlier first-run experience, built-in ポッドキャスト ホスティング
TTSOpenAI vs Play.ht
TTSOpenAIが勝利した点： pay-per-use billing, lower latency for live use, simpler credit 会計
Play.htが勝利した点： a larger stock voice catalogue, more export presets, longer free allowance each month
TTSOpenAI vs ElevenLabs
TTSOpenAIが勝利した点： cost on light workloads, no subscription commitment, straightforward credit top-ups
ElevenLabsが勝利した点： character acting range, dubbing tools, a deeper library of community voices
よくある質問
Speechifyは本当に無料ですか？
Partly. The Limited plan costs $0/month and never expires, but it caps words and locks the best voices. Paid tiers start at $11.58 monthly on annual billing.
Speechifyの料金はいくらですか？
Two paid tiers: $11.58 a month billed annually, or $29 a month rolling. Prices shift by country, so check your local checkout total before subscribing.
ttsopenaiは無料で利用できますか？
There is a free tier for testing. Beyond that you buy credits at $0.00004 each and spend them only when you generate audio.
OpenAIのTTSはどの程度優れているのか？
Strong for narration. The models handle intonation and emphasis well, and you can direct tone through written instructions. English output beats other languages.
Speechifyよりも優れたものは何ですか？
Depends on the job. For producing voiceovers, TTSOpenAI or ElevenLabs beat it. For reading scanned pages aloud, nothing here replaces it.
English 
Spanish 
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Portuguese 
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