Speechify Voice AI の代替ツール
Speechify Voice AI is a free Windows app on the Microsoft Store that reads documents aloud with more than 1,000 natural voices in 60-plus languages and lets users dictate into Outlook, Word, Slack, Notion and Chrome.
Speechify Voice AI's free tier offers limited functionality, with the full voice library and advanced voices requiring a subscription. Furthermore, the store version is only available on Windows. If you're looking for an alternative to long-term subscriptions for reading and dictation, or need a cross-platform, one-time purchase solution, these tools offer more tailored paths for specific scenarios.
クイック比較
| ツール | 料金 | 評価 | おすすめ対象 |
|---|---|---|---|
| Speechify Voice AI (オリジナル) | フリーミアム | 3.4 | - |
| Lirivo | 無料 | 4.0 | Apple ecosystem users who frequently read long documents and need TTS without a subscription. |
| NiceVoice | フリーミアム | 3.0 | Creators producing video voiceovers and audio content. |
| SonaVoice | 無料 | 4.2 | Windows users who rely on voice typing for documents, emails, or code. |
| Mama's Voice | フリーミアム | 4.1 | Parents of 3–8 year olds who want to tell bedtime stories in a parent's voice. |
| AssemblyAI | フリーミアム | 4.5 | - |
| Ultravox.ai | フリーミアム | 4.4 | - |
Lirivo turns PDFs, Markdown, and long text into spoken audio on iPhone, using built-in iOS voices or your own Azure, Google Cloud, or Gemini TTS account, with offline playback, lock-screen controls, and adjustable speed.
代替として優れている理由
Reads PDFs, Markdown, and long texts using your iPhone's free built-in voices, with zero registration cost. You can also link your own Azure, Google Cloud, or Gemini TTS accounts, with voice costs directly billed by the respective cloud provider for transparent pricing.
おすすめ対象
Apple ecosystem users who frequently read long documents and need TTS without a subscription.
こんな場合に最適
You need an iPhone tool that offers offline listening and can perform basic reading tasks for free using built-in voices.
長所
- Uses free built-in iPhone voices with zero signup
- Bring-your-own cloud TTS keeps voice pricing transparent and provider-direct
- Offline audio library plays without a network
短所
- iPhone only, with no iPad or Android release
- Cloud voice setup requires an Azure, Google, or Gemini account
- No shared cross-device audio library across accounts
NiceVoice is an AI voice synthesis platform that leans towards being "creator-friendly," with an overall experience that focuses more on whether the generated results are natural and pleasant to listen to, rather than piling up complex settings. From a usability perspective, it does not require users to understand voice models or parameter structures. Users only need to organize the text content properly to quickly obtain relatively stable voiceover results, making it suitable for scenarios where frequent generation of voice content is required.
代替として優れている理由
Features a creator-focused interface with a low learning curve, capable of consistently producing natural, pleasant synthetic speech, ideal for batch voiceover tasks. A free plan is available.
おすすめ対象
Creators producing video voiceovers and audio content.
こんな場合に最適
You want a cross-platform, easy-to-use TTS platform that reliably generates natural-sounding speech, rather than being limited to a single Windows entry point.
長所
- Creator-friendly interface with minimal learning curve.
- Produces natural, pleasant-synthetic speech that is easy on the ears.
- Delivers stable results consistently, suitable for batch voiceover tasks.
短所
- Limited customization for users who want fine-grained control over voice characteristics.
- Voice styles and language support might be restricted compared to more advanced platforms.
- Lack of detailed documentation on advanced features due to its simplicity focus.
SonaVoice is a Windows voice-typing tool: place your cursor in any app, hold Right Ctrl to speak, and it inserts clean, punctuated text, with a custom dictionary for names and jargon.
代替として優れている理由
Allows you to insert text with grammar and punctuation into any Windows application by holding down the right Ctrl key and speaking. Includes a custom dictionary for handling names, brands, and industry terms. The free plan requires no credit card.
おすすめ対象
Windows users who rely on voice typing for documents, emails, or code.
こんな場合に最適
You primarily need to replace Speechify's voice dictation functionality, not its reading features, and want to avoid subscription costs.
長所
- Works in any Windows app with a simple push-to-talk key
- Adds grammar, punctuation, and corrections automatically
- Custom dictionary handles names, brands, and technical jargon
短所
- Windows 10 and 11 only, with no macOS, Linux, or mobile version described
- Free plan is capped at 2,500 words per month
- Public Pro pricing is not stated on the pages reviewed
Nightly personalized bedtime stories narrated in a parent voice clone, covering 14 languages, generated from a single one-time voice recording.
代替として優れている理由
Clones a parent's voice from a single recording for long-term use, generating age-appropriate stories for children nightly. Supports 14 languages and does not collect children's voices.
おすすめ対象
Parents of 3–8 year olds who want to tell bedtime stories in a parent's voice.
こんな場合に最適
You need personalized parent-child story reading, not general document reading, and are willing to pay for a daily story scenario.
長所
- One-time voice cloning keeps a parent voice available every night
- Age-tuned length and vocabulary for kids from 3 to 8
- Encrypted voiceprints and no collection of the child voice
短所
- Requires a clear voice sample to clone well
- Regular daily use sits behind a paid subscription
AssemblyAI supplies production Voice AI APIs: speech-to-text, real-time streaming, a voice agent WebSocket, speech understanding, and PII guardrails.
長所
- Production-grade Speech-to-Text APIs with high accuracy and multilingual support
- Real-time streaming plus batch modes over standard HTTP and WebSocket
- Voice Agent API enabling speech-to-speech conversational assistants
短所
- Aimed at developers; there is no polished consumer-facing app
- Advanced features such as voice agents may involve additional configuration
- Volume pricing means costs can rise for very large audio workloads
Ultravox.ai is a speech-native voice AI platform for developers, powering real-time conversational agents with low-latency APIs, web and mobile SDKs, and built-in telephony integrations.
長所
- Speech-native model keeps tone and turn-taking cues
- Built-in telephony makes phone deployments simpler
- SDKs cover both web and mobile use cases
短所
- Developer-only; no low-code or drag-and-drop builder
- Pro plan cost may be high for very light workloads
選び方
First, clarify whether your primary need is for 'reading' or 'writing.' If you mainly use an iPhone to read PDFs, Markdown, and long texts, Lirivo is the most cost-effective option, utilizing free built-in voices and supporting your own cloud TTS accounts. If you work across multiple platforms and desire stable, natural-sounding synthetic speech, NiceVoice's free tier and affordable subscriptions are better suited for content creators. If your main goal is quick voice typing on Windows, SonaVoice's free plan (2,500 characters/month) and custom dictionary allow you to start at no cost. Finally, if you tell your child stories every night, Mama's Voice's one-time voice cloning and annual subscription (around $99) offer better value than a long-term recurring payment.
もっと見る
類似ツール
Mama's Voice
Mama's Voiceは、親の声をクローンして毎晩子どもに寝る前のストーリーを読み聞かせます。一度録音すれば生涯使用でき、14の言語に対応。語彙と物語の長さは子どもの年齢に合わせて自動調整されます。
Lirivo
LirivoはiPhone向けの音声読み上げツールで、PDF、Markdown、長文ドキュメントをオーディオに変換できます。システム内蔵の音声を使用できるほか、Azure、Google Cloud、Gemini TTSにも対応しています。バックグラウンド再生、ロック画面での操作、オフラインでの再聴取をサポートしています。
AssemblyAI
AssemblyAIは、開発者向けに産業グレードの音声AIインフラストラクチャを提供し、オフラインおよびリアルタイムの音声文字起こし、音声エージェントWebSocket、音声理解、PIIガードレール、LLMゲートウェイを含みます。
NiceVoice
NiceVoiceは、より「クリエイターに優しい」AI音声合成プラットフォームであり、全体的な体験は複雑な設定を積み重ねるよりも、生成結果が自然で聞きやすいかどうかに重点を置いています。 使用の観点から見ると、ユーザーが音声モデルやパラメータ構造を理解する必要はなく、テキストコンテンツを整理するだけで、比較的安定したナレーション結果を迅速に得ることができ、頻繁に音声コンテンツを生成する必要があるシナリオに適しています。
