Text to speech and voice AI across every device
Text to speech and voice AI across every device
CastReader records 55,999 monthly visits with +9.8% month-over-month growth and Freemium pricing. Moises records 4,486,503 monthly visits with +6.6% growth and Freemium pricing.

Read aloud webpages, PDFs, Kindle books and AI answers with synced highlighting
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | castreader.com | moises.ai |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 56K (55,999) | 4.49M (4,486,503) |
| MoM Traffic Delta | +4.98K (+9.8%) | +276.22K (+6.6%) |
| Primary Market & Share | 🇺🇸 United States (56%) | 🇧🇷 Brazil (16.1%) |
| Direct Visits / mo | 19.7K | 1.97M |
| User Rating | 4.4 | 4.6 |
| Supported Platforms | Website | Website |

Read aloud webpages, PDFs, Kindle books and AI answers with synced highlighting
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.
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.
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.
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.

The musician's app for stem separation, practice and mastering
Split any track into up to 27 isolated stems including vocals, drums, bass, guitar, piano, keys, winds and strings.
Slow the speed without changing pitch, transpose the key, loop sections and mute or solo your part while you play along.
Automatically detect the chords in a song and transcribe lyrics so you can learn songs faster.
Arrange, record and edit the same session with bandmates or producers in real time, right in the browser.
Text to speech and voice AI across every device
Text to speech and voice AI across every device
Offers exceptionally clean vocal and instrumental stem separation, but lacks Moises's built-in chord detection and practice tools.
Offers exceptionally clean vocal and instrumental stem separation, but lacks Moises's built-in chord detection and practice tools.

SpecialistComprehensive music production ecosystem focusing on mastering and distribution, rather than interactive instrument practice.
SpecialistComprehensive music production ecosystem focusing on mastering and distribution, rather than interactive instrument practice.
Free AI text to speech with 200+ voices in 70+ languages
Free AI text to speech with 200+ voices in 70+ languages
SpecialistAll-in-one AI music studio for generating, editing, and mastering royalty-free tracks
SpecialistAll-in-one AI music studio for generating, editing, and mastering royalty-free tracks

SpecialistSpecializes in advanced AI voice cloning and singing generation, alongside robust stem separation capabilities.
SpecialistSpecializes in advanced AI voice cloning and singing generation, alongside robust stem separation capabilities.

Great for automated remixing and key detection, but has fewer dedicated practice tools than Moises.
Great for automated remixing and key detection, but has fewer dedicated practice tools than Moises.

SpecialistStreamlined automated audio mastering studio, but does not provide stem separation or practice tools.
SpecialistStreamlined automated audio mastering studio, but does not provide stem separation or practice tools.
Listen to anything. Beautifully.
Listen to anything. Beautifully.

Browser-based AI vocal remover, stem splitter and audio cleaner
Browser-based AI vocal remover, stem splitter and audio cleaner

Provides chord charts, tabs, and vocal separation, but lacks Moises's advanced speed and pitch adjustment controls.

Simple web-based stem separation tool, but offers fewer audio utility features and practice aids than Moises.
Simple web-based stem separation tool, but offers fewer audio utility features and practice aids than Moises.