How do CastReader and Grammarly compare in monthly traffic?

CastReader has 55,999 monthly visits, while Grammarly has 58,867,412. 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%; Grammarly has -1.5%.

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. Grammarly: Freemium. Free plan ($0/month) includes core grammar and spelling checks, tone detection, and 100 generative AI prompts/month; Grammarly Pro costs $12/member/month billed annually ($144/year, or $30/month billed monthly) with full-sentence rewrites, plagiarism/AI detection, team style guides, and 2,000 AI prompts/month, while Enterprise offers custom pricing with unlimited AI prompts and BYOK security.

What are alternatives to CastReader and Grammarly?

Other tools in related categories include DeepL, QuillBot Paraphraser, LanguageTool, Speechify, ProWritingAid.

Open AI Tools

CastReader vs Grammarly — Traffic (56K vs 58.87M), Pricing & Verdict | Open AI Tools

Head-to-Head Benchmark

CastReader vs Grammarly

CastReader records 55,999 monthly visits with +9.8% month-over-month growth and Freemium pricing. Grammarly records 58,867,412 monthly visits with -1.5% growth and Freemium pricing.

CastReaderFreemium

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

Monthly Visits

56K

MoM Velocity

+9.8%

Top Market

🇺🇸 United States

View CastReader Analysis castreader.com

GrammarlyFreemiumTraffic Leader

Cross-platform AI writing assistant delivering real-time grammar correction, tone alignment, authorship tracking, and team style guides.

Monthly Visits

58.87M

MoM Velocity

-1.5%

Top Market

🇺🇸 United States

View Grammarly Analysis grammarly.com

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	CastReader	Grammarly
Official Domain	castreader.com	grammarly.com
Pricing Model	Freemium	Freemium
Monthly Visits	56K (55,999)	58.87M (58,867,412)
MoM Traffic Delta

Primary Market & Share	🇺🇸 United States (56%)	🇺🇸 United States (51.9%)

Direct Visits / mo	19.7K	25.4M

User Rating	4.4	4.4

Supported Platforms	Website	Website

CastReader

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

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.

Strengths & Pros

+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

Grammarly

Cross-platform AI writing assistant delivering real-time grammar correction, tone alignment, authorship tracking, and team style guides.

Ubiquitous Inline Rewriting & Tone Calibration

Works natively inside Chrome, Safari, Firefox, Edge, Windows, Mac, Google Docs, MS Office, and mobile keyboards to flag grammar mistakes, rewrite tangled sentences, and shift tone toward confident, empathetic, or executive registers.

Specialized AI Agents (AI Grader, Citation Finder & Reader Reactions)

Deploys contextual AI agents that predict how a target audience will react to a draft, locate credible supporting citations, grade essays against rubric criteria, and generate drafts using up to 2,000 monthly prompts on Pro.

Grammarly Authorship, AI Detector & Plagiarism Checker

Scans text against billions of web pages and academic databases for accidental plagiarism, detects AI-generated passages, and logs transparent document provenance via Authorship reports in Google Docs and Word.

Team Style Guides, Brand Tones & Knowledge Share

Enables teams on Pro and Enterprise plans to codify company terminology, ban deprecated jargon, enforce inclusive language, insert shared Snippets, and surface internal company definitions inline.

Strengths & Pros

+Frictionless cross-platform integration works inside virtually every browser, desktop app, email client, and mobile OS without copy-pasting into a separate chatbot.
+