Cezar Rachieru

Inquirer
DISC Type : cd

Co-Founder & Operating Partner at Startup Theory Lab

San Francisco, California, United States

Overview

Cezar is a versatile C-suite leader specializing in scaling startups from seed to IPO with a focus on sustainable growth and successful exits. He is currently a Co-Founder at the AI incubator Startup Theory Lab and is pursuing an Advanced Management Program at Harvard Business School Executive Education.

He is an active participant in the startup ecosystem, attending events like the Stripe Sessions and All-in Summit to connect with founders and investors. Cezar is engaged with the NYC startup scene and advises VC-funded companies on growth and operational efficiency, leveraging his experience from Y Combinators W20 batch.

Unique fact: Cezar describes ambiguity as his "middle name, " thriving in multi-faceted C-suite roles from COO to CMO and CPO to drive startup success.

Personality Overview

ROI Conscious

Demanding

Judgemental

They respond well to confident salespeople.  They focus on objectivity in a pitch and pay little attention to bells and whistles. They can be nudged to make faster decisions by offering what they value.

Topics They Care About

Startup Scaling
His career focuses on setting clear roadmaps for scaling, fundraising, and achieving product-market fit for early-stage and growth-stage companies.
AI Business Integration
Co-founded an AI incubator, Startup Theory Lab, and previously implemented AI pricing strategies at Duffl to unlock customer value.
Lean Operations
Emphasizes the importance of lean OPEX and cost-reduction strategies to ensure sustainable growth and profitability for startups.

Media Appearances

Cezar has no verified media appearances

Work History

1-2025
Co-Founder & Operating Partner at Startup Theory Lab
1-2025
Family Office Advisor | Capital Allocation - Startups at Family Office
4-2020 - 1-2025
Fractional COO | Leadership Team | Board Advisor | Successful Exit (Inven 2025) at FINX Consulting Services
12-2022 - 5-2024
Vice President Strategy and Operations | Leadership Team | YC W20 | Exit 2024 at Duffl
12-2021 - 12-2022
Director of Operations | Board Advisor at Duffl

Education

Education details unavailable from Y Combinator
Advanced Management Program - Ongoing from Harvard Business School Executive Education

More Information

Social Presence :

Prographics :

Exp : 4 Location : San Francisco, California, United States Job Level : Leadership Designation : Co-Founder & Operating Partner at Startup Theory Lab
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Insights For Selling To Cezar

During A Call Or A Meeting

DO's

  • Highlight the competitive differentiation of your product
  • Stress on the business value that your product offers
  • Make sure that they have the necessary authority, they could present false stature sometimes

DONT's

  • Do not give up if they are not convinced, try again with a different approach
  • Don’t expect them to change their mind quickly if they say no once
  • Refrain from asking too many questions

When Cold Calling

When Writing An Email

While Negotiating & Closing

    The secret to closing fast with Cezar is

  • Conviction in the product matters to them, followed by proof points and strong testimonials.
  • Will you ever get a clear answer from Cezar

  • They may not be very forthcoming, but they will say no if needed.

Insights For Deal Planning

    How fast (or slow) will Cezar move?

  • They are neither the fastest decision makers nor the slowest.
  • Can Cezar take some risk or not?

  • They can take risks but after weighing up the pros and cons.

You And Cezar

Personality Compatibility


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