Baidu Text-to-Speech vs NaturalReader

Baidu Text-to-Speech converts text into speech for applications and devices, with Chinese, English, mixed Chinese-English, and more than 70 voice styles available through its online service. Users can change speech rate, pitch, volume, and supported emotional effects; Chinese polyphonic characters can be annotated with pronunciation. Streaming synthesis can play audio nearly as text is entered, and long-text synthesis handles up to 100,000 Chinese characters in one request. Baidu provides HTTP and WebSocket APIs, online and offline SDKs, and Android and iOS SDKs for phones and smart devices. Offline synthesis is intended for settings with weak or no network access, including mobile apps, readers, robots, and smart hardware. Listed uses include audiobook reading, news and order announcements, and smart hardware. Short-text API requests must stay under 1,024 GBK bytes, with 120 bytes or less recommended. Export formats are MP3, PCM, and WAV. The service offers a free trial; offline trial and license plans are listed, while prices for other listed plans are not provided.

NaturalReader converts written documents into spoken audio and supports formats including PDF, EPUB, DOC/DOCX, PPT/PPTX, Numbers, and Pages. It is available on Android, iOS, macOS, Windows, the web, and as an extension; its mobile apps include offline mode. AI voices support over 90 languages, and voice cloning is available. Users can download audio as MP3, while commercial plans also support WAV at 44.1 kHz. The free forever plan does not require a credit card. Personal plans are licensed for personal use and do not include the commercial AI Voice Generator; commercial plans include commercially licensed audio for business and public uses. EDU accounts let administrators manage students, teachers, and classrooms and provide shared document libraries. Plans include individual, commercial, team, education, and site-license options, with different allowances and billing arrangements. Listed prices include Lite at $79 a year, Plus at $119 a year, and Pro at $25.90 a month; the pricing note lists paid plans from $13.90/user/mo. App-store prices may vary due to exchange rates, fees, taxes, or VAT.