Hi Product Hunt, I'm Rakesh from Infugin Technologies. We've built software for local businesses since 2012, and finding them was always the slow part: hours of searching, reading websites and writing emails nobody answered.

KnockB is the tool we built for ourselves. You tell it who you sell to and where. A crew of AI agents then:

• finds local businesses that fit, from open map data

• reads each business's own website and notes one specific thing worth mentioning

• writes a short personal first email and a follow-up in your voice

• waits for your YES in the app, Slack or Telegram before anything is sent

• sends from your own Google mailbox, slowly, in business hours

• turns a reply into a drafted answer with open times, then a calendar invite

You can also upload your own list (CSV or Excel) and have each person written to personally.

What it doesn't do yet, so you know up front: it works in the United States only, with Google Workspace and Gmail mailboxes only, and there's no CRM sync. Open map data doesn't list every business, and many don't publish an email address. During early access you bring your own Claude API key.

KnockB is in early access. Request an invite on the site and I'll get back to you personally. I'd love to hear what you'd want it to check on a prospect's website before it writes.