Delphi for authors

Readers finish your book with questions. Your Delphi answers them in your words, long after the last page.

Discover Authors

Try the authors already on Delphi. Pick one and see what people ask them.

Robert Cialdini

Founder of the Cialdini Institute; has spent his career researching persuasion

NYT bestselling author

Why themThe source on the principles of influence and how to use them ethically.

How can I identify my own influence triggers?

I started studying influence because I noticed I was the classic patsy: I bought things I didn't want and gave to causes I'd never heard of, all because someone pulled a trigger I hadn't recognized.

How it works

  1. Bring what you've already said

    Your books, talks, interviews, and newsletters. Your Delphi learns from your own words.

  2. Put it where readers already are

    Your link in bio, your website, your newsletter, and your book's page.

Sign up

Why authors build their Delphi here

Your work stays yours
You keep ownership of everything you add. Your Delphi is provided only to you.
Built from what you've already said
Add your books, talks, interviews, newsletters, and podcast. Your Delphi learns from all of it.
Readers can talk or type
Voice calls and chat in more than 40 languages, on your profile page or embedded on your book's site.
Free
Building your Delphi costs nothing, and neither does talking to it.

Who it answers

Each example is a real author on Delphi. Open their Delphi to see it answer.

  • Readers

    Readers ask about the chapter they're stuck on and hear your explanation.

    Nir Eyal
  • Newsletter subscribers

    Subscribers ask about past issues and get your answer.

    Lenny Rachitsky
  • People in hard moments

    Someone who needs your work at 2am can find it.

    David Kessler

What people ask authors on Delphi

Suggested questions from their profiles.

See every question by topic

Questions

What do I need to get started?

A Google account and some of your own material: talks, interviews, posts, a book, a podcast, or a YouTube channel. Your Delphi learns from all of it.

Will it say things I'd never say?

It answers from what you've given it. You decide which topics it covers, review what it says, and correct it when it's off.

Do readers know it's a Delphi?

Yes. Every conversation is clearly with your Delphi, not with you live.

Can my team help run it?

Yes. Add the people you trust to help run it and review what it says.

Is it free?

Yes. Building your Delphi is free, and so is everyone talking to it.

Who owns my content?

You do. Your Delphi is provided only to you, and Delphi uses your content only to run it. If you leave, your content is deleted, or kept for six months first if you choose.

Who else uses Delphi

Answer every reader in your own words.