⚡ Quick Verdict:
- 価格: Speechify has a free plan and paid plans from $11.58/month. Captions AI paid plans start at $9.99/month.
- 最適な用途: Speechify for turning text into audio. Captions AI for video creation and subtitles.
- 主な違い： Speechify focuses on text to speech. Captions AI focuses on video content and editing.
- Our pick: Captions AI for most users, since short video now drives most online reach.
Speechify and Captions AI both use artificial intelligence to save you time.
But they are not built for the same job.
Speechify turns written text into audio you can listen to.
Captions AI turns your video content into polished, captioned clips.
This Speechify vs Captions AI guide is a side by side comparison of both.
By the end, you will know the best tool for your work.
概要
This Speechify vs Captions AI comparison covers pricing, features, and ease of use.
We also break down who each tool works best for.
Our writers spent hands-on time with both apps directly.
Those notes appear in the “What Our Team Noticed” sections below.
We also checked published specs, documentation, and G2 reviews.
Speechifyとは何ですか?
Speechify is primarily a text to speech and audio-learning tool.
It reads your documents, PDFs, and web articles aloud.
The tool turns written text into clear, natural audio content.
It uses lifelike AI 声 for professional voiceovers in a few seconds.
Speechify can even read physical books and printed notes out loud.
It is helpful for students, auditory learners, and anyone with reading difficulties.
The platform has over 20 million downloads across its apps.
スピーチファイ
Turn any written content into lifelike audio. Listen to PDFs, documents, and web pages with natural AI voices.
Speechifyの価格
2026年のSpeechifyの料金は以下の通りです。詳しく見ていきましょう。
| プラン | 価格 | 最適な用途 |
|---|---|---|
| 限定 | 月額0ドル | Trying the free plan |
| 年間 | 月額11.58ドル | Daily readers on a budget |
| 毎月 | 月額29ドル | Short-term, flexible use |
Pricing verified June 2026.
無料トライアル: Yes. The free Limited plan lets you test core text to speech without paying.
返金保証: Speechify offers a refund window on paid plans. Check the current terms at checkout.
📌 注記： The free plan does not include transcription features. Speechify also sells higher 仕事 tiers priced per user. Reported per-seat rates run near $69 (Basic) and $99 (Premium), which sit well above the consumer plans shown here.
⚠️ 警告： The annual plan bills the full year up front. Read the renewal terms before you buy to avoid surprise charges.
Speechifyの主なメリット
Speechify packs a wide array of features, and the most impressive ones are worth considering:
- まるで生きているかのようなAI音声： 声 ジェネレータ creates natural speech in many voices. It works well for professional voiceovers.
- Reads Anything Aloud: Listen to documents, PDFs, and web pages. You can even scan a printed file and hear it read.
- Fast Reading Speed: Speechify can read up to 900 words per minute. It claims you absorb information 3x faster than reading.
- 音声クローニング: Make a custom voice from a short sample. This gives your audio content a personal touch.
- 複数の言語: It supports many languages, so you can listen in the voice you prefer.
- どこでも動作します: Use it in your browser or on mobile apps. Your library syncs across platforms.
- Built for Accessibility: The focus on audio helps users with reading difficulties stay engaged.
What Our Team Noticed
私たちの 作家 signed up for Speechify and used it for daily reading. During signup, the app showed a verification successful waiting screen before the dashboard loaded. Here is what stood out after that:
Speechifyの長所と短所
✅ メリット
- Turns written text into natural audio in a few seconds
- Reads PDFs, documents, web pages, and physical books aloud
- Strong voice generator and voice cloning for AI voices
- Free plan and apps across browser and mobile platforms
❌ デメリット
- Users report awkward pauses between sentences while reading
- It sometimes switches AI voices unexpectedly during use
- Transcription accuracy averages around 90% and is not its main focus
- Some users experience major bugs in the system from time to time
Captions AIとは何ですか？
Captions AI is a video creation and editing platform.
It is built for generating, captioning, and translating video content.
The tool excels at transcribing speech, and its ability to add kinetic captions stands out.
It automates stylized, animated subtitles for short-form videos.
You can also build AI avatars from text or video scripts.
It is designed for mobile-first, quick visual edits.
🏆 Winner: Captions AI
Generate, caption, and translate video in one place. Add animated subtitles and AI avatars for engaging short-form content.
キャプションAIの価格
Here is what Captions AI costs in 2026. Let’s break it down.
| プラン | 価格 | 最適な用途 |
|---|---|---|
| プロ | 月額9.99ドル | ソロクリエイターとして活動を始めたばかりの人 |
| マックス | 月額24.99ドル | Active creators posting often |
| 規模 | 月額69.99ドル | Teams and heavy video output |
Pricing verified June 2026.
無料トライアル: Yes. You can test the app and basic features before picking a paid plan.
返金保証: Refund terms depend on the app store you subscribe through. Check the policy at signup.
📌 注記： Higher plans unlock more credits, AI avatars, and video creation power. The Pro plan is enough for most solo creators.
⚠️ 警告： Credits can run out fast if you make many videos. Watch your usage on the basic Pro plan.
字幕AIの主な利点
Here is what makes Captions AI worth considering:
- 自動字幕: It generates accurate subtitles from your speech. The animated style keeps short videos engaging.
- AIビデオ 編集： Quick visual edits clean up your footage. The focus on mobile makes editing fast on the go.
- AIアバター: Turn a script into a talking video. You can create avatars from text or a short video clip.
- 動画翻訳： It translates spoken video into multiple languages. Lip movements sync to the new language.
- Speech Recognition: Strong speech recognition powers near real time transcription for your clips.
- クリーンな音声: A background noise remover and AI eye contact tool give clips a professional look.
- クリエイターのために作られました： It is one tool for video creation, captions, and translation in one place.
What Our Team Noticed
Our writer used Captions AI to make a few short clips on a phone. Here is what stood out from that hands-on time:
字幕AIのメリットとデメリット
✅ メリット
- Generates stylized animated captions for short-form videos
- Translates spoken video into multiple languages with リップシンク
- Builds AI avatars from text or video scripts in a few seconds
- Mobile-first design makes quick visual edits user friendly
❌ デメリット
- No free plan listed, so you pay to keep creating videos
- Credits on the basic plan run out with heavy use
- It does not read documents or long written content aloud
機能比較
Ready to dive into a detailed comparison of Speechify vs Captions AI? We’ll explore the key features that separate these two platforms. This will help you pick the best tool for your work.
| 特徴 | スピーチファイ | キャプションAI |
|---|---|---|
| 開始価格 | 月額11.58ドル | 月額9.99ドル |
| 無料プラン | ✅ | ❌ |
| テキスト読み上げ | ✅ | ❌ |
| 音声クローン | ✅ | ✅ (AI Twins) |
| ビデオ作成 | ❌ | ✅ |
| 自動字幕 | ❌ | ✅ |
| 複数の言語 | ✅ | ✅ |
| Speech Transcription | ~90% accuracy | ✅ (kinetic captions) |
| AIアバター | ❌ | ✅ |
| 最適な用途 | テキストを聞く | Making videos |
1. AI Voices and Voice Generation
スピーチファイ： The voice generator is the core of the tool. It creates clear, natural AI voices for professional voiceovers. You can pick a voice, paste written text, and hear audio in a few seconds.
キャプションAI: Voices here serve video, not long reading. The AI Creators feature pairs generated voices with on-screen avatars. The focus is video content, so the voice rides on top of the visuals.
2. Voice Cloning and AI Twins
スピーチファイ： Voice cloning copies your voice from a short sample. You can then read any file or document in your own voice. This is handy for a personal, branded audio library.
キャプションAI: AI Twins clones both your voice and your face. You record once, then generate new talking videos from a script. It is voice cloning built for video, not for reading documents.
3. Text to Speech and Audio Content
スピーチファイ： This is where Speechify wins by a mile. It turns written content into audio content you can listen to anywhere. Choose Speechify for turning text into lifelike audio at up to 900 words per minute.
キャプションAI: It does not read long documents aloud. The AI Shorts feature instead spins ideas into ready-to-post video clips. Speechify focuses on audio, while Captions AI focuses on video.
💡 テスト結果： If your goal is listening to text, Speechify is the clear pick. If your goal is making short videos, Captions AI is built for that job.
4. Video Creation and Editing
スピーチファイ： Speechify does not specialize in visual video captioning or editing. Its focus stays on audio learning and reading. For real video creation, you would need a different tool.
キャプションAI: The AI Edit feature trims, cleans, and styles your footage fast. It is tailored for quick visual edits and mobile-first use. Here is how the editing flow looks in the app.
Beyond basic trims, you can fine-tune the look of each clip. Video customization tools control fonts, colors, and layout.
5. Captions, Subtitles, and Transcription
スピーチファイ： Scan & Listen reads printed pages and PDFs out loud. Its transcription accuracy averages around 90%, and transcription is not its main focus. Speechify lacks a primary focus on transcription quality.
キャプションAI: This is its home turf. It transcribes speech and generates kinetic, animated captions for video. The auto-captions tool builds stylized subtitles that sync to your words.
⚠️ 警告： Neither tool is a dedicated transcription app. For pure accuracy, specialized tools go further. Sonix offers up to 99% accuracy, Happy Scribe supports over 120 languages, Otter.ai handles meetings and lectures, Rev.ai is HIPAA-compliant, Fireflies gives 800 minutes of free storage, and Wavel AI summarizes in any language.
6. Multiple Languages and Translation
スピーチファイ： AI Dubbing reads your written text aloud in multiple languages. You can listen to the same file in different voices. This helps you reach a wider world without re-recording.
キャプションAI: Translation here is built for video. It translates spoken video into multiple languages while syncing lip movements. The result looks natural, as if you filmed it in that language.
7. AI Avatars and Talking Videos
スピーチファイ： ありません アバター feature. Speechify is an audio tool, so it has no on-screen face. You get voice, not video.
キャプションAI: AI Avatar generator creates avatars from text or video scripts. You type a script and get a talking video back. This is useful for ads, プレゼンテーション, and faceless channels.
8. Video Polish: Eye Contact and Noise Removal
キャプションAI: AI Eye Contact fixes your gaze so you appear to look at the camera. It makes talking-head videos feel more engaging and natural.
A background noise remover then cleans up messy audio. This gives clips a professional sound without extra gear.
スピーチファイ： These video polish tools have no match in Speechify. Its job is reading text, not cleaning footage. That is the clearest break between the two apps.
9. Integrations and Access
スピーチファイ： API access lets developers add text to speech to their own apps. You also get a browser extension and mobile apps. Your library syncs across platforms.
キャプションAI: Access is mobile-first, with desktop options for editing. The site and apps focus on a fast, simple flow. You record, caption, and post from one place.
10. 価格設定とコスト
料金プランを並べて比較してみましょう。
| プラン | スピーチファイ | キャプションAI |
|---|---|---|
| 入場無料 | 月額0ドル（制限あり） | ❌（無料トライアルのみ） |
| スターター | 月額11.58ドル（年間契約） | 月額9.99ドル（プロプラン） |
| 中級クラス | 月額29ドル（月払い） | 月額24.99ドル（最大） |
| トップティア | — | 月額69.99ドル（スケールプラン） |
スピーチファイ： The free plan is the big draw. Paid pricing starts at $11.58/month on the annual plan, with a flexible $29/month option. It is good value if you mostly need text to speech.
キャプションAI: The Pro plan starts at $9.99/month, the lowest entry price in this comparison. There is no free plan, only a free trial, so you pay to keep making videos.
さまざまなシナリオ
| 必要な場合は | 選ぶ | なぜ |
|---|---|---|
| To listen to documents | スピーチファイ | Built for text to speech |
| Short social videos | キャプションAI | Auto subtitles and edits |
| 無料プラン | スピーチファイ | Free Limited tier |
| AI avatars on camera | キャプションAI | AI Twins and avatars |
| 最低価格 | キャプションAI | $9.99/month Pro plan |
| Reading help | スピーチファイ | Helps reading difficulties |
💰 あなたの予算
Speechify has a free plan, which is great for a tight budget. Captions AI starts at $9.99/month but has no free tier.
🔌 あなたの技術スタック
Speechify offers API access and a browser extension for written content. Captions AI is mobile-first and aimed at fast video creation.
📝 コンテンツの種類
Pick Speechify if you work mostly with audio and written text. Pick Captions AI if your output is video content and subtitles.
🎓 あなたの経験レベル
Both tools are user friendly for beginners. Captions AI keeps editing simple, and Speechify keeps the focus on basic listening.
🆓 無料トライアルとデモ
Test both before you pay. The free Speechify plan and the Captions AI free trial let you try the core tools risk-free.
🛟 サポートオプション
Both platforms offer help docs and customer support. Check the current channels on each site before you commit.
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？
🔄 Switching from Speechify to Captions AI?
✅ 得られるもの：
- Auto subtitles and animated captions for video
- AI avatars and video creation from a script
- Video translation with synced lip movements
❌ 失うもの：
- Reading documents and PDFs aloud
- The free plan and fast 900-words-per-minute reading
- The voice generator for long audio content
📋切り替え方法：
- Save any audio files you still need from Speechify
- Create a Captions AI account on mobile
- Upload a clip and try the auto-captions tool
🔄 Switching from Captions AI to Speechify?
✅ 得られるもの：
- Turning text and documents into audio you can listen to
- A free plan and lower entry cost for reading
- Voice cloning for personal, hands-free listening
❌ 失うもの：
- Video editing, avatars, and animated subtitles
- AI eye contact and background noise removal
- Video translation with lip sync
📋切り替え方法：
- Download any finished videos from Captions AI
- Sign up for the free Speechify plan
- Add a PDF or article and press play to listen
What Our Review Didn’t Cover
This comparison focused on solo creators and everyday users. We did not test large team workflows or custom enterprise pricing. Our notes are based on the June 2026 versions, so features may change in the future. If you need deep transcription for legal or medical work, your priorities will differ from what we covered here.
最終評決
| カテゴリ | 勝者 |
|---|---|
| 💰価格 | キャプションAI |
| 🔊 テキスト読み上げ | スピーチファイ |
| 🎬 動画制作 | キャプションAI |
| 📝 字幕とキャプション | キャプションAI |
| 👶 使いやすさ | ネクタイ |
| ♿ アクセシビリティ | スピーチファイ |
| 🏆総合優勝 | キャプションAI |
🏆 WINNER: CAPTIONS AI
Captions AI wins 4 out of 6 categories.
最適な用途: video creation, automated subtitles, AI avatars, and short-form social clips
Speechify and Captions AI are two very different products.
Speechify is the best tool for turning written content into audio.
Captions AI is the best tool for video content and subtitles.
If you mainly need to listen to text, Speechify is excellent.
But for most creators making engaging videos, Captions AI is the better choice. We hope this head-to-head comparison helps you pick with confidence.
Speechifyの比較
Speechifyが他の競合他社と比べてどのような点が優れているかを以下に示します。
Speechify vs イレブンラボ
Speechifyが勝利した点： reading documents aloud, a free plan, fast 900-words-per-minute listening
ElevenLabsが勝利した点： studio-grade voice quality, finer voice control, deeper voice cloning for pros
Speechify vs マーフAI
Speechifyが勝利した点： reading whole articles aloud, mobile listening, an accessibility focus
Murf AIが勝利した点： polished voiceovers for projects, a voice studio editor, simple team sharing
Speechify vs ナチュラルリーダー
Speechifyが勝利した点： larger voice library, voice cloning, higher reading speed
NaturalReaderが優れている点： a generous free reader, simple browser use, lower paid pricing
字幕AIの比較
Here is how Captions AI stacks up against other competitors:
字幕AI対 ヘイジェン
字幕AIが勝利した項目： mobile-first editing, animated captions, lower starting price
HeyGenが勝利した点： a bigger avatar library, longer videos, stronger brand templates
字幕AI対 シンセシア
字幕AIが勝利した項目： short-form social clips, quick mobile edits, animated subtitle styles
Synthesiaが優れている点： training videos, many stock avatars, team and presentation workflows
字幕AI対 した
字幕AIが勝利した項目： auto subtitles, mobile editing, lip-synced translation
D-IDが勝利した点： creating videos from text and images, a user-friendly interface, paid plans from $5.9 per month
よくある質問
What is the best text to speech AI?
Speechify is a top text to speech AI. It turns written text into natural audio at up to 900 words per minute, with voice cloning and multiple languages.
キャプションAIは何をするものですか？
Captions AI is a video tool. It transcribes speech, generates animated subtitles, builds AI avatars, and translates spoken video into multiple languages with synced lip movements.
Does Speechify use AI?
Yes. Speechify uses artificial intelligence to create lifelike AI voices. It reads documents, PDFs, and web pages aloud, and supports voice cloning in multiple languages.
字幕作成に最適なAIは何ですか？
Captions AI is a strong pick for subtitles. It generates accurate, animated captions from your speech and syncs them to short-form video in a few seconds.
AIによる字幕の精度はどの程度ですか？
AI captions are usually accurate but not perfect. Captions AI handles clear speech well. For top accuracy, specialized tools like Sonix reach up to 99%.
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