NMai isn't an email-writing tool. It's your own AI assistant, always one click away in your Gmail™ side panel.

Most AI chats forget earlier conversations the longer you talk. NMai keeps the key points as "REF cards" and carries them into your next conversation. It restates your company's core premises (Core Kernel) every time, so answers don't drift. Words you don't want to share, like company or client names, are masked before anything is sent to the AI.

From work questions to summarizing documents and organizing your thinking — a trustworthy AI for business, right beside your Gmail™.

Key features
- REF cards: the key points of each conversation, carried into the next one
- Core Kernel: your company's premises, restated every time so answers don't drift
- Prompt Checker (CK): words you register are replaced with *** before sending, including text in PDFs and images
- Deep Rinc: recall what you discussed in the past, in depth
- Canvas: save results to Google Docs™ in your own Drive
- On a smartphone: a full-screen chat opens from the Gmail™ app (you can also add it to your home screen; detailed setup on a computer)
- English and Japanese, in your own time zone

Pricing
- Free plan: no time limit (daily usage limits apply)
- Pro plan: US$14.99/month (¥1,980 including tax in Japan). More daily uses, recall from your entire memory, and a more advanced AI model.
Subscribe with the "Upgrade to Pro" button at the top of the NMai full-screen chat, and cancel anytime from Manage plan in Settings (⚙️).

Privacy
NMai uses the paid Gemini™ API, so under Google's terms your conversations are not used to train AI models. Chat history is automatically deleted after 7 days; only summarized memory cards are kept. See our privacy policy for details.