CastReader 记录了 55,999 月访问量，月度环比增长为 +9.8%，定价为免费增值。OpenAI.fm 记录了 358,988 月访问量，增长率为 +48%，定价为免费。
OpenAI.fm is a browser-based playground that showcases the speech generation models behind OpenAI's text-to-speech API. Type or paste text, optionally steer the delivery with an inline instruction, and hear the result spoken aloud by a selectable voice. It is a quick way to compare voices and styles before you commit to an API integration.
| 维度 / 指标 |  | |
|---|---|---|
| 官方域名 | castreader.com | openai.fm |
| 定价模式 | 免费增值 | 免费 |
| 月访问量 | 5.6万 (55,999) | 35.9万 (358,988) |
| 月度环比流量变化 | +4983 (+9.8%) | +11.64万 (+48%) |
| 主要市场与份额 | 🇺🇸 美国 (56%) | 🇮🇳 印度 (41.5%) |
| 直接访问 / 月 | 1.97万 | 21.07万 |
| 用户评分 | 4.4 | 4.6 |
| 支持的平台 | 网站 | 网站 |
为网页、PDF、Kindle 电子书与 AI 回答朗读，并同步高亮
自然 AI 语音朗读网页、PDF、电子书与文档，逐词高亮并自动滚动，让你始终不迷路。
不只朗读难段，还用你最熟悉的语言总结并拆解其含义，同时用动画笔在原文中标注关键句。
覆盖 Kindle、微信读书、Google Play Books、O'Reilly 等图书平台，新闻与订阅网站，Google Docs、Notion、Gmail，以及 ChatGPT、Claude、Gemini、DeepSeek、Kimi 的回答。
试听多种语言的真实语音样本，并可创建私人克隆声音，Pro 会员可将其应用于自己的 PDF、EPUB、Word、TXT 文件。
OpenAI.fm is a browser-based playground that showcases the speech generation models behind OpenAI's text-to-speech API. Type or paste text, optionally steer the delivery with an inline instruction, and hear the result spoken aloud by a selectable voice. It is a quick way to compare voices and styles before you commit to an API integration.
Pick from a roster of built-in voices ranging from bright and conversational to calm and narration-friendly, then hear the same line delivered differently.
Add a short natural-language direction such as "speak slowly and warmly" to influence tone, pace, and emotion without changing the script itself.
Paste a paragraph or a full script and stream the synthesized audio immediately, with no signup, install, or configuration step.
Switch voices, styles, and wording back-to-back to judge which combination fits a voiceover, audiobook, or product demo.
提供强大得多的声音克隆与情感表现范围，但缺乏 OpenAI 专属的语音预览界面布局。
拥有 5,000+ 真实音色、支持 150 种语言的 AI 文本转语音
专项更强Vbee AIVoice is a Vietnamese AI voice platform that converts text to natural speech, clones voices from short recordings, and dubs video content — supporting dozens of languages and a library of AI and community voices.
专项更强Vbee AIVoice is a Vietnamese AI voice platform that converts text to natural speech, clones voices from short recordings, and dubs video content — supporting dozens of languages and a library of AI and community voices.
能快速将贴上的文字转换为可下载的 MP3，但缺乏高阶 AI 语音设计与情感控制功能。
倾听一切，尽享优雅。
Includes robust voice cloning and podcast hosting tools, but is less focused on simple interactive voice testing.
