Building Cluely: The Viral AI Startup that raised $15M in 10 Weeks

What if virality wasn’t a tactic — but the entire product?

In this episode, a16z General Partners Erik Torenberg and Bryan Kim sit down with Roy Lee, cofounder and CEO of Cluely, one of the most talked-about consumer AI startups of 2025. Cluely didn’t raise a mega round or drop a feature suite to get traction - it broke through by turning distribution into design: launching viral short-form videos, pushing polarizing product drops, and building in public with speed and spectacle.

We cover:

– Why virality is Cluely’s moat

– Building a brand-native AI interface

– The Gen Z founder mindset

– What most startups get wrong about attention

– Why creators are the new product managers

– Cluely’s long-term vision for ambient AI

Cluely is a glimpse at the next generation of startups, where the line between product and performance is disappearing.

Timecodes:

00:00 Introduction

01:07 Early Success

02:02 Roy's Journey: From College Kid to Tech Universe

04:37 The Turning Point: Harvard and Beyond

06:57 Building Cluey: The Early Days

08:27 The Viral Strategy: Mastering Algorithms

13:56 The 50 Interns Experiment

15:30 The Investment Journey: Roy and Bryan's Partnership

19:20 Momentum as a Moat: The Future of AI Companies

20:32 The Evolution of Product Strategy in the AI Era

21:19 The Importance of Speed and Adaptability

22:48 The Role of Distribution in Modern Startups

24:26 Roy's Journey and Product Development

25:25 The Power of User Data and Feedback

26:58 Innovative Marketing and Distribution Tactics

28:25 The Future of AI Integration and Translucent Overlays

32:15 Controversial Marketing and Authenticity

34:01 The Impact of Radical Transparency

36:42 The Changing Landscape of Professionalism

38:26 Concluding Thoughts and Future Vision

Resources:

Find Roy on X: https://x.com/im_roy_lee

Find Bryan on X: https://x.com/kirbyman01

Learn more about Cluely: http://cluely.com/

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Please note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures.

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Follow our host: https://twitter.com/eriktorenberg

Please note that the content here is for informational purposes only; should NOT be taken as legal, business, tax, or investment advice or be used to evaluate any investment or security; and is not directed at any investors or potential investors in any a16z fund. a16z and its affiliates may maintain investments in the companies discussed. For more details please see a16z.com/disclosures.

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