
Provides stronger multi-modal reasoning and agentic tools, but lacks DeepSeek's ultra-low-cost API pricing.
#1DeepSeek records 372,761,591 monthly visits with +4.3% month-over-month growth and Freemium pricing. Isaac records 3,765 monthly visits with -21% growth and Freemium pricing.
Research, edit, and write with AI at your side
| Dimension / Metric | ||
|---|---|---|
| Official Domain | deepseek.com | isaaceditor.com |
| Pricing Model | Freemium | Freemium |
| Monthly Visits | 372.76M (372,761,591) | 3.77K (3,765) |
| MoM Traffic Delta | +15.36M (+4.3%) |
| -998 (-21%) |
| Primary Market & Share | 🇨🇳 China (50.5%) | 🇺🇸 United States (73.4%) |
|---|
| Direct Visits / mo | 291.59M | 1.48K |
|---|
| User Rating | 4.8 | 4.2 |
|---|
| Supported Platforms | Website | Website |
|---|
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.
Research, edit, and write with AI at your side
A ChatGPT-style assistant tuned for scholarly writing, with autocomplete, paraphrasing, summarization, and first-draft generation.
Search relevant academic literature inside the app, then keep sources organized in a reference list beside the editor.
Upload your papers and ask questions about them, so you can interrogate a source without leaving your document.
Automated functions help streamline literature reviews and other repetitive research tasks.

Provides stronger multi-modal reasoning and agentic tools, but lacks DeepSeek's ultra-low-cost API pricing.
#1
Offers an enormous context window and deep Google ecosystem integration, but feels less specialized for pure reasoning tasks.
#2Delivers superior long-form coding artifacts and nuanced writing, but lacks DeepSeek's specialized open-weight reasoning models.

Features real-time X social data integration, but is less cost-effective for dedicated developer coding workflows.
SpecialistReal-time AI answer engine and research workspace combining live web citations with frontier reasoning models.
Paraphrase, proofread and summarize text with an AI writing workspace

Free / Open-sourceProvides comparable open-weight foundation models and multilingual performance, but requires self-hosting or third-party inference setup.

SpecialistThe AI coding agent for building ambitious software

SpecialistExcels at ultra-long document analysis and research, but lacks the same level of open-weight developer community support.
Free / Open-sourceEnables running open-source models locally on consumer hardware, but lacks DeepSeek's cloud-scale hosted reasoning power.

AI research platform for reading, understanding and writing scientific papers
AI research assistant for evidence-based literature review and synthesis
Provides stronger multi-modal reasoning and agentic tools, but lacks DeepSeek's ultra-low-cost API pricing.
Offers an enormous context window and deep Google ecosystem integration, but feels less specialized for pure reasoning tasks.
Delivers superior long-form coding artifacts and nuanced writing, but lacks DeepSeek's specialized open-weight reasoning models.
Features real-time X social data integration, but is less cost-effective for dedicated developer coding workflows.
SpecialistReal-time AI answer engine and research workspace combining live web citations with frontier reasoning models.
Paraphrase, proofread and summarize text with an AI writing workspace
Free / Open-sourceProvides comparable open-weight foundation models and multilingual performance, but requires self-hosting or third-party inference setup.
SpecialistThe AI coding agent for building ambitious software
SpecialistExcels at ultra-long document analysis and research, but lacks the same level of open-weight developer community support.
Free / Open-sourceEnables running open-source models locally on consumer hardware, but lacks DeepSeek's cloud-scale hosted reasoning power.
AI research platform for reading, understanding and writing scientific papers