Knockin' Review — An AI Business Card That Replies

What Is Knockin'?

It is an AI business card launched on Product Hunt on September 8, 2026 with the tagline that it turns your static bio into an AI business card that replies. Instead of a row of links, a visitor lands on a card that can answer questions about you and your work in your own voice.

You bring what you already know, the platform learns what matters, and it becomes one link that can speak for you. The product is built for founders, freelancers, sales and business-development people, and creators, and its makers describe it as a safe space where every question leaves a trace.

How the Card Works

Building a card follows three steps: Build, Refine, and Share. You choose a template, add your work, links, and content, and decide what the AI is allowed to use and the boundaries for its answers. You then test the card, tune the answers, and publish a single link.

Visitors can ask questions, get answers in your voice, discover what matters to them, and book time with you directly. A connected Google Calendar lets the card find an open time, invite the visitor, and create the meeting without back-and-forth.

• Build from a template with your work, links, and content
• Choose what the AI can use and where its answers stop
• AI Concierge greets visitors in your voice
• Knowledge engine answers from what you already know
• Google Calendar books meetings automatically

AI Contacts and Follow-Up

A notable part of the product is that it remembers who stopped by and what they asked. Every question leaves useful context, so when you follow up you can continue from where the conversation left off rather than starting cold.

Over time, the questions visitors ask also show you how others see your work and what they want to understand better. The card can be shared as a link, a QR code, an email signature, or a quick tap, and an AI Contacts feature (still early) tracks those interactions.

• Remembers visitors and their questions for context
• Follow-ups continue from where the conversation left off
• See how others describe and understand your work
• Share by link, QR code, email signature, or tap
• AI Contacts tracks who stopped by

Security and Privacy

The platform processes the content, links, and knowledge you add to a card, along with the questions and contact details of visitors who interact with it. Because people can ask questions and supply their own details, the card collects message and contact data on your behalf, and the AI answers you publish can reveal information you chose to share.

The product operates as a hosted service with published privacy and terms pages, and its maker behind the Knock-in / Lucius AI name. There are no public claims of end-to-end encryption or zero retention, so treat what you publish to a card as visible to visitors and processed by the platform.

• Card content, visitor questions, and contacts are stored
• Published answers reveal what you chose to share
• Hosted service with published privacy and terms
• No claim of zero retention or end-to-end encryption
• Controls let you set boundaries for AI answers

Who Should Use It?

The product suits anyone whose story deserves more room than a static bio. Founders can turn what they have built into a bio that explains the business, freelancers can let clients understand their process and availability before a first call, and sales and BD people can give prospects one place to understand expertise and past work.

It is most useful for people who repeat the same handful of sentences in every intro and want those questions answered before a meeting. It is less useful for those who need a fully custom or heavily branded site rather than a templated card.

Top Alternatives

For richer team knowledge and notes, [Notion AI](/tools/notion-ai) and [Taskade](/tools/taskade) offer trusted knowledge and automation, while scheduling can be handled by a [Zapier](/tools/zapier) workflow or social scheduling via [Buffer](/tools/buffer). None of these is an AI business card, so the card fills a distinct niche.

The closest comparison is another interactive digital card product; for most users, the decision is whether you want the AI to answer and book for you, or just to share links and a calendar.

Pricing

Free to start — no credit card required and set up in minutes. Detailed paid-plan pricing is not publicly itemized on the official site.

Best For

Recommended use cases and scenarios where Knockin' shines.

Frequently Asked Questions

Common questions about Knockin', answered.