# CastReader vs SayAI

CastReader records 55,999 monthly visits with +9.8% month-over-month growth and Freemium pricing. SayAI records 0 monthly visits with — growth and Free pricing.

| Metric | [CastReader](https://openaitools.app/tool/castreader) | [SayAI](https://openaitools.app/tool/sayai) |
| :--- | :--- | :--- |
| Website URL | https://castreader.com | https://chromewebstore.google.com/detail/sayai/emchggmopcefohdhejkbekjpekbcfppf |
| Categories | AI Text-to-Speech, AI Speech Synthesis, AI Reader | AI Speech-to-Text, AI Text-to-Speech, AI Voice Assistants, AI Chatbot |
| Pricing Model | Freemium | Free |
| Monthly Visits | 55,999 | 0 |
| MoM Growth Rate | +9.8% | — |
| Primary Market | United States | Global |
| Direct Visits | 19,699 | 0 |
| Review Score | 4.4 | 3.5 |
| Saved Count | 0 | 1 |
| Supported Platforms | Website | Browser Extension |

## CastReader

CastReader is built for people who want to consume long-form text with their ears as well as their eyes. Once installed as a Chrome or Edge extension, or opened as an iPhone, iPad or Android app, it reads supported pages and documents aloud using natural AI voices while a word-synced highlight and auto-scroll keep your place. A public Voice Hub lets you preview real voice samples by language before committing, and playback speed ranges from standard rates up to 3x on the paid plan.

What separates it from a plain screen reader is a feature called Read & Explain. Instead of only pronouncing a dense or foreign-language paragraph, CastReader works out what it means and walks you through it in the language you know best, while an animated pen circles and underlines the relevant lines in the original text. That mix of eyes-on-page and ears-on-explanation is aimed at research papers, technical documentation, foreign-language news and other long reads where passive narration is not enough.

Sources are organised into four families: book platforms such as Kindle, WeRead, Google Play Books, Libby, Kobo and O'Reilly; articles and subscriptions including Medium, Substack, The Atlantic, The New Yorker and major newspapers; work documents and email such as Google Docs, Notion, Gmail and Google Drive; and AI conversations from ChatGPT, Claude, Gemini, DeepSeek and Kimi. CastReader also offers private voice cloning for your own documents and a developer Voice API for embedding cloned speech into applications. Free use needs no account, and payments are handled by Stripe.

**Pricing & Plans:** Freemium. Free plan: $0 forever with 20 minutes of listening per day, standard voices up to 1.25x speed, 3 AI explains per day, and 30,000 translation characters per day when signed in. Pro: $4.99/month or $35.99/year (about $3/month, 40% saving) removing the daily listening cap, unlocking full ebooks and long PDFs, more premium voices up to 3x speed, unlimited daily explains, 120 personal-voice minutes per membership month, and 3,000,000 translation characters per month. A 3-day free trial is available; billing is via Stripe.

- **Synced read-aloud:** Natural AI voices narrate webpages, PDFs, ebooks and documents while each spoken word is highlighted and the page auto-scrolls, so you never lose your place.
- **Read & Explain:** Instead of only reading a hard passage, CastReader summarises and unpacks its meaning in the language you know best, with an animated pen marking the key lines in the original text.
- **Wide source coverage:** Works across Kindle, WeRead, Google Play Books, O'Reilly and other book platforms, news and newsletter sites, Google Docs, Notion, Gmail, plus ChatGPT, Claude, Gemini, DeepSeek and Kimi answers.
- **Voice Hub and voice cloning:** Preview real samples of dozens of voices across many languages, and create private cloned voices that Pro members can apply to their own PDF, EPUB, Word and TXT files.
- **Developer Voice API:** A REST API for text-to-speech and private voice cloning in 10 languages, returning MP3 or WAV, priced at $8 per 1M characters for successful generations.

**Strengths:** Combines plain read-aloud with guided explanations that point back at the source text; Covers an unusually broad set of sources, from Kindle and Gmail to ChatGPT and Claude answers; Free tier is genuinely usable with no account required, and the 3-day Pro trial needs no commitment; Personal voice cloning and a pay-per-success Voice API extend it beyond a simple reader

**Limitations:** The 20-minute daily listening cap on the free plan runs out quickly for long books or PDFs; Source support and iOS previews vary by platform, browser version and content access rules; Applying a cloned voice to your own text is limited to 120 minutes per membership month even on Pro

[Profile (Markdown)](https://openaitools.app/tool/castreader.md)

## SayAI

SayAI does one job and does it simply: it makes the ChatGPT website friendlier for your voice. Once installed, the extension adds a recording control to the ChatGPT page, letting you dictate your questions instead of typing them. Voice capture relies on the OpenAI Whisper API, which supports a number of languages, so you can mix spoken work and written prompts in the same session.

For output, SayAI can read ChatGPT's replies aloud using the browser's built-in speechSynthesis engine and the voices already installed on your operating system. That means the answer can be heard while you look elsewhere, which is handy for long responses, for note-taking, and for users who find screen reading tiring or difficult.

Both directions are optional and independently switchable. You can speak your question but let ChatGPT answer silently in text, or keep typing and only enable spoken answers. The extension is free and declares that it does not collect or sell user data, making it a lightweight accessibility and convenience add-on rather than a full voice-assistant platform.

**Pricing & Plans:** SayAI is free to install and use from the Chrome Web Store. No subscription is listed by the developer.

- **Voice input for ChatGPT:** Record your question directly in the ChatGPT web UI instead of typing it, with several languages supported through the OpenAI Whisper API.
- **Spoken answers:** ChatGPT's replies are read aloud using the browser speechSynthesis API and your operating system's installed voices.
- **Independently toggled modes:** Turn voice recording and text-to-speech on or off separately in the interface to suit the moment.
- **Lightweight and free:** A small extension (well under a megabyte) with no cost and a developer declaration of no data collection.

**Strengths:** Completely free with no account or subscription; Simple, focused purpose that is easy to understand; Speech and read-aloud modes can be toggled separately; Developer declares no data collection

**Limitations:** Tied to the ChatGPT website, so it does not help with other AI tools; Voice output quality depends on your operating system's installed voices; Maintained by a small individual developer, so updates may be infrequent

[Profile (Markdown)](https://openaitools.app/tool/sayai.md)

## Frequently Asked Questions

### How do CastReader and SayAI compare in monthly traffic?

CastReader has 55,999 monthly visits, while SayAI has 0. Traffic estimates describe audience size, not product quality.

### How do their growth rates compare?

CastReader has a month-over-month growth rate of +9.8%; SayAI has —.

### How does pricing compare?

CastReader: Freemium. Freemium. Free plan: $0 forever with 20 minutes of listening per day, standard voices up to 1.25x speed, 3 AI explains per day, and 30,000 translation characters per day when signed in. Pro: $4.99/month or $35.99/year (about $3/month, 40% saving) removing the daily listening cap, unlocking full ebooks and long PDFs, more premium voices up to 3x speed, unlimited daily explains, 120 personal-voice minutes per membership month, and 3,000,000 translation characters per month. A 3-day free trial is available; billing is via Stripe. SayAI: Free. SayAI is free to install and use from the Chrome Web Store. No subscription is listed by the developer.

## Alternatives

| # | Tool Name | Monthly Visits | MoM Growth Rate | Pricing Model | Summary | Profile (Markdown) |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| 1 | [Speechify](https://openaitools.app/tool/speechify) | 5,457,475 | +0.5% | Freemium | Text to speech and voice AI across every device | [.md](https://openaitools.app/tool/speechify.md) |
| 2 | [Luvvoice](https://openaitools.app/tool/luvvoice-free-text-to-speech) | 1,438,923 | -8.2% | Freemium | Free AI text to speech with 200+ voices in 70+ languages | [.md](https://openaitools.app/tool/luvvoice-free-text-to-speech.md) |
| 3 | [Peech: Text to Speech Reader](https://openaitools.app/tool/peech-text-to-speech-reader) | 353,093 | -26% | Freemium | Listen to anything. Beautifully. | [.md](https://openaitools.app/tool/peech-text-to-speech-reader.md) |
| 4 | [Voice Out](https://openaitools.app/tool/voice-out) | 39,679 | -27.1% | Freemium | Turn any webpage, PDF, Doc or ebook into natural-sounding speech in 60+ languages | [.md](https://openaitools.app/tool/voice-out.md) |
| 5 | [Audeus: Text to Speech Reader](https://openaitools.app/tool/audeus-text-to-speech-reader) | 32,118 | -37.8% | Freemium, Free Trial | Turn PDFs, docs and web pages into natural-sounding audio you can listen to anywhere | [.md](https://openaitools.app/tool/audeus-text-to-speech-reader.md) |
| 6 | [GPT Reader & Transcriber](https://openaitools.app/tool/gpt-reader-a-free-ai-text-to-speech) | 29,995 | -16% | Free | Free ChatGPT-style text-to-speech and speech-to-text in your browser | [.md](https://openaitools.app/tool/gpt-reader-a-free-ai-text-to-speech.md) |
| 7 | [Read Aloud Reader](https://openaitools.app/tool/read-aloud-reader) | 28,361 | +87.7% | Freemium | Free browser text-to-speech with natural neural voices | [.md](https://openaitools.app/tool/read-aloud-reader.md) |
| 8 | [Readio](https://openaitools.app/tool/readio-1) | 12,402 | +6.7% | Freemium | Listen to PDFs, ebooks, and webpages in natural AI voices with synced highlighting. | [.md](https://openaitools.app/tool/readio-1.md) |
| 9 | [Clearly Reader](https://openaitools.app/tool/clearlyreader-com) | 10,350 | -29.1% | Freemium | Reader mode, text-to-speech and AI summaries for any web page | [.md](https://openaitools.app/tool/clearlyreader-com.md) |
| 10 | [Speakoala](https://openaitools.app/tool/speakoala) | 2,765 | +18.2% | Freemium | Turn any web page, PDF or email into natural speech you can listen to anywhere | [.md](https://openaitools.app/tool/speakoala.md) |

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Source: https://openaitools.app/compare/castreader-vs-sayai

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