Kotaro Nakamoto

Solo founder & AI Product Engineer in Tokyo.
I build MLPs (Most Lovable Products). 4 products shipped.
Now building AI-powered email filtering for B2B.
Love spending time w/my Yome 👫
Let's connect if you're into DX, email, or AI.

Social Links

Products

MLPs I've shipped. 3 running, 2 shut down.

formpuppy
AI-powered email filtering for businesses. Get a dedicated email address, and only the emails that matter reach your inbox. Spam and sales pitches are filtered automatically.
Launched, Feb 2026 ~ present
Times.new
A platform where people can share thoughts without the noise of social media. Built for those who want meaningful expression over viral content.
2025 - present

Posts

Recent activity

I built an AI filter to stop sales spam from burying real customer emails — formpuppy

Just shipped German 🇩🇪 — and DSGVO made it an obvious target

formpuppy – AI filter for contact form spam (no code changes needed)

formpuppy – AI filter for contact form spam (no code changes needed)

formpuppy – AI filter for contact form spam (no code changes needed)

I built an AI filter to stop sales spam from burying real customer emails — formpuppy

I built an AI filter to stop sales spam from burying real customer emails — formpuppy

I built an AI filter to stop sales spam from burying real customer emails — formpuppy

I built an AI filter to stop sales spam from burying real customer emails — formpuppy

I built an AI filter to stop sales spam from burying real customer emails — formpuppy

I built an AI filter to stop sales spam from burying real customer emails — formpuppy

How are you building in public?

Best Email SaaS for Transactional? Sendgrid out of style?

Can you build in public without Twitter?