OpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
Traffic SummaryCastReader records 51,016 monthly visits with +32.8% month-over-month growth and Flexible pricing. DeepSeek records 357,399,386 monthly visits with +1% growth and Freemium pricing.
Text-to-speech reader for webpages, PDFs, Kindle books, and AI answers
Monthly traffic volume, acquisition channels, pricing structure, and ecosystem footprint
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | castreader.com | deepseek.com |
| Pricing Model | Flexible | Freemium |
| Pricing Details | Free plan covers everyday reading with 20 minutes of listening per day. Pro is about $3 per month when billed yearly and removes the daily listening cap. | Free web and mobile chat app at chat.deepseek.com; pay-as-you-go OpenAI-compatible API with off-peak rates at $0.15/1M input ($0.003 cache hit) and $0.60/1M output for deepseek-flash (V4.1-Flash), and $0.66/1M input ($0.022 cache hit) and $1.98/1M output for deepseek-v4-pro (peak weekday UTC hours bill at 2x). |
| Monthly Visits | 51.02K51,016 visits/mo | 357.4M357,399,386 visits/mo |
| MoM Traffic Delta | +12.59K12,589 visits delta | +3.6M3,597,280 visits delta |
| MoM Growth Velocity (%) | +32.8% | +1% |
| Primary Market & Share | 🇺🇸 United States(73.6% share) | 🇨🇳 China(50.5% share) |
| Direct Visits / mo | 19.43K(19,434) | 280.06M(280,059,676) |
| Referral Visits / mo | 14.85K(14,854) | 10.57M(10,570,000) |
| Email Visits / mo | 214(214) | 2.21M(2,211,842) |
| User Rating | 5 / 5(98 reviews) | 3.8 / 5(68 reviews) |
| Bookmarks | 0 saves | 44 saves |
| Supported Platforms | Website | Website |
| Chrome Extension Installs | — | — |
| Discord Community Members | — | — |
| Primary Categories |

Text-to-speech reader for webpages, PDFs, Kindle books, and AI answers
Text-to-speech reader for webpages, PDFs, Kindle books, and AI answers

High-efficiency open-weight and hosted reasoning AI powered by DeepSeek-V4 and R1 at ultra-low token costs.
Leverages a sparse Mixture-of-Experts architecture (49B active parameters out of 1.6T on V4-Pro) to process up to 1 million tokens with minimal latency and memory overhead.
Pioneered by DeepSeek-R1 and integrated into V3.2 and V4 thinking modes, exposing step-by-step self-verification for complex math, logic, and code debugging.
Drops input token costs to $0.003/1M on Flash and $0.022/1M on V4-Pro for cache hits, with 50% lower rates during off-peak UTC hours.
Provides free access at chat.deepseek.com and on iOS/Android with document uploads, reasoning mode, and web search without paywalling core models.
CastReader has 51,016 monthly visits, while DeepSeek has 357,399,386. Traffic estimates describe audience size, not product quality.
CastReader has a month-over-month growth rate of +32.8%; DeepSeek has +1%.
CastReader: Flexible. Free plan covers everyday reading with 20 minutes of listening per day. Pro is about $3 per month when billed yearly and removes the daily listening cap. DeepSeek: Freemium. Free web and mobile chat app at chat.deepseek.com; pay-as-you-go OpenAI-compatible API with off-peak rates at $0.15/1M input ($0.003 cache hit) and $0.60/1M output for deepseek-flash (V4.1-Flash), and $0.66/1M input ($0.022 cache hit) and $1.98/1M output for deepseek-v4-pro (peak weekday UTC hours bill at 2x).
Other tools in related categories include ChatGPT, Google Gemini, Claude, Grok, Hostinger AI Website Builder & Hosting.
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