
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.

HyperWrite records 255,429 monthly visits with +34.4% month-over-month growth and Freemium pricing. MAIL EVOLVED records 0 monthly visits with — growth and Freemium, Free Trial, Paid pricing.

Generate Gmail replies with ChatGPT using your own OpenAI API key
| Dimension / Metric | ![]() | ![]() |
|---|---|---|
| Official Domain | hyperwriteai.com | chromewebstore.google.com |
| Pricing Model | Freemium | Freemium, Free Trial, Paid |
| Monthly Visits | 255.43K (255,429) | 0 (0) |
| MoM Traffic Delta | +65.35K (+34.4%) | 0 (—) |
|---|
| Primary Market & Share | 🇺🇸 United States (44.5%) | 🌐 Global (—) |
|---|
| Direct Visits / mo | 107.72K | 0 |
|---|
| User Rating | 3.9 | 3.3 |
|---|
| Supported Platforms | Website | Browser Extension |
|---|

AI writing assistant with autocomplete, research, and a Chrome extension
Context-aware sentence completions appear as you type in Gmail, Google Docs, and other sites through the Chrome extension.
Generate a paragraph from a short prompt or rewrite existing text in a new tone while preserving meaning.
HyperWrite Scholar searches millions of scholarly articles so drafts can include factual, properly cited information.
Turn a few keywords into a complete, ready-to-send email reply without switching tabs.

Generate Gmail replies with ChatGPT using your own OpenAI API key
A row of generation buttons appears next to the standard reply control whenever you start answering an email in Gmail.
You paste your own OpenAI API key once in the settings; all requests are billed to your own OpenAI account.
Each button maps to a different type of answer, from a short acknowledgement to a free-form custom response.
Generated text is placed straight into the Gmail reply box so you can review, edit, or send it immediately.

SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.

SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
SpecialistReal-time AI answer engine and research workspace combining live web citations with frontier reasoning models.

SpecialistSpecializes in robust grammar correction, spelling, and tone adjustments across apps, but lacks generative predictive writing autocomplete.
SpecialistExcels at sentence paraphrasing, summarization, and citation formatting, but lacks HyperWrite's active predictive browser autocompletion.

Free / Open-sourceAI grammar, spelling and style checker for 30+ languages

Offers an all-in-one browser extension with chat, writing assistance, and search capabilities, though less focused on predictive autocomplete.

Provides a browser extension sidebar integrating multiple frontier models and writing tools, offering broader model choice than HyperWrite.
SpecialistTailored specifically for academic and research writing with source citations and autocomplete, rivaling HyperWrite's scholarly tools.
Bundles multiple leading LLMs into a browser extension for web summarization and writing, similar to HyperWrite's research assistant.
Combines writing assistance and web automation inside a browser extension, but focuses heavily on scraping and monitoring tasks.

Turn a few key points into polished, on-tone emails
SpecialistOpenAI's flagship multimodal assistant powered by GPT-6 and GPT-5.6 for reasoning, coding, and deep research.
SpecialistAnthropic's frontier AI workspace powered by Claude 5.5 for agentic coding, analysis, and nuanced writing.
SpecialistReal-time AI answer engine and research workspace combining live web citations with frontier reasoning models.
SpecialistSpecializes in robust grammar correction, spelling, and tone adjustments across apps, but lacks generative predictive writing autocomplete.
SpecialistExcels at sentence paraphrasing, summarization, and citation formatting, but lacks HyperWrite's active predictive browser autocompletion.
Free / Open-sourceAI grammar, spelling and style checker for 30+ languages
Offers an all-in-one browser extension with chat, writing assistance, and search capabilities, though less focused on predictive autocomplete.
Provides a browser extension sidebar integrating multiple frontier models and writing tools, offering broader model choice than HyperWrite.
SpecialistTailored specifically for academic and research writing with source citations and autocomplete, rivaling HyperWrite's scholarly tools.
Bundles multiple leading LLMs into a browser extension for web summarization and writing, similar to HyperWrite's research assistant.
Turn a few key points into polished, on-tone emails