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Ghostwriter: When AI goes from tool to teammate

Sierra Blog ·

The material outlines Ghostwriter’s evolution into a proactive, asynchronous AI teammate integrated with Slack and Teams; describes how it generates novel business insights by analyzing team and customer interactions; and states that competitive differentiation for AI-native companies stems from proprietary context and customer relationships—not foundational AI capability. Read 3 viewpoints with supporting evidence and source links.

Bret Taylor, Clay Bavor
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3 key points

Synthesis

  1. Ghostwriter is designed as a proactive teammate in Slack and Teams

    The authors describe Ghostwriter’s move from a tool users actively prompt to a proactive, asynchronous, creative teammate that lives in Slack and Teams.

    Supporting evidence 1

    Original excerpt

    We’ve transformed Ghostwriter from a tool you prompt to a teammate in Slack and Teams that’s always on, proactive, asynchronous, and creative.

    Bret Taylor, Clay Bavor · Paragraph 4

    Ghostwriter: When AI goes from tool to teammate · Sep 28, 2026

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    AI teammate design principles →

  2. AI teammates generate novel business insights by synthesizing team conversations and customer interactions

    By analyzing team conversations and millions of customer interactions, Ghostwriter identifies insights and business ideas the team didn’t know they needed—evolving from 'I did what you asked' to 'I think I found a better way', 'I noticed something you should see', or 'I have an idea we haven’t tried.'

    Supporting evidence 1

    Original excerpt

    With the context of your team’s conversations and the millions of customer interactions your agent is having, this new version of Ghostwriter will help you find insights and business ideas you didn’t even know you needed. What started as “I did what you asked” has become “I think I found a better way to do it”, “I noticed something you should see,” or “I have an idea we have not tried.”

    Bret Taylor, Clay Bavor · Paragraph 7

    Ghostwriter: When AI goes from tool to teammate · Sep 28, 2026

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    AI-driven insight generation →

  3. Differentiation comes from proprietary context and customer relationships, not raw AI capability

    In a world where everyone has access to the same foundational AI models, what differentiates a company is its proprietary context and relationships with customers—assets that are uniquely owned and can yield a compounding advantage over time.

    Supporting evidence 1

    Original excerpt

    In a world where everyone has access to the same intelligence, what differentiates your company? The context and relationships you’ve built with customers. It’s something that is uniquely yours and can create a compounding advantage over time.

    Bret Taylor, Clay Bavor · Paragraph 21

    Ghostwriter: When AI goes from tool to teammate · Sep 28, 2026

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    competitive differentiation in AI-native companies →

Key passages3

Attributed passages with the context to verify them. Open the original text to check the source.

Paragraph 7 (opens in a new tab)
AI-driven insight generation

AI teammates generate novel business insights by synthesizing team conversations and customer interactions

Original excerpt

With the context of your team’s conversations and the millions of customer interactions your agent is having, this new version of Ghostwriter will help you find insights and business ideas you didn’t even know you needed. What started as “I did what you asked” has become “I think I found a better way to do it”, “I noticed something you should see,” or “I have an idea we have not tried.”
Bret Taylor, Clay Bavor·
Paragraph 21 (opens in a new tab)
competitive differentiation in AI-native companies

Differentiation comes from proprietary context and customer relationships, not raw AI capability

Original excerpt

In a world where everyone has access to the same intelligence, what differentiates your company? The context and relationships you’ve built with customers. It’s something that is uniquely yours and can create a compounding advantage over time.
Bret Taylor, Clay Bavor·

Mentioned here

All mentioned things

Ghostwriter

Supports

The authors describe Ghostwriter as having been transformed from a prompted tool into a proactive, asynchronous, creative teammate embedded in Slack and Teams.

Read supporting evidence · Bret Taylor, Clay Bavor
Supports

The authors state that Ghostwriter, by analyzing team conversations and customer interactions, identifies novel insights and business ideas the team hadn't recognized, evolving its behavior from task execution to proactive suggestion.

Read supporting evidence · Bret Taylor, Clay Bavor

Source & methodology

These viewpoints are linked to their original sources. Paraphrases are labeled and are not verbatim quotes.

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