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Michael Seibel

North America, California, United States, San Francisco

Description

Michael Seibel is a highly influential figure in the startup ecosystem, primarily known for his role as a Managing Director and Group Partner at Y Combinator, one of the world's most prestigious startup accelerators. Before transitioning into venture capital and accelerator leadership, Seibel was a successful entrepreneur. He co-founded Justin.tv, which later evolved into the immensely popular live-streaming platform Twitch, acquired by Amazon for $970 million in 2014. He also served as CEO of Socialcam, a mobile video sharing app that was acquired by Autodesk for $60 million in 2012, demonstrating his strong track record in building and scaling technology companies.

Since joining Y Combinator in 2013, Michael Seibel has played a pivotal role in shaping its investment strategy and program development. He has been a vocal advocate for increasing diversity within the tech industry, actively working to fund and support founders from underrepresented backgrounds. His deep operational experience as a founder provides invaluable mentorship to the thousands of startups that pass through YC's rigorous program each year, guiding them through the challenges of early-stage growth and fundraising.

Under his leadership and alongside other partners, Y Combinator provides a standardized investment package to its batch companies. As of early 2022, YC's typical first cheque for participating startups is a total of $500,000. This investment is structured in two parts: an initial $125,000 for 7% equity, and an additional $375,000 on an uncapped Most Favored Nation (MFN) SAFE. This consistent and substantial early-stage capital is a cornerstone of YC's model, enabling founders to focus on product development and market fit.

Michael Seibel's impact extends beyond direct investment. He is instrumental in refining YC's curriculum and fostering a supportive community for founders. His guidance helps shape the trajectory of companies that collectively represent a significant portion of the global startup economy. The thousands of companies funded by YC, many of which he has directly overseen, boast a combined valuation exceeding $600 billion, underscoring his profound influence on the venture landscape.

Investor Profile

Michael Seibel has backed more than 51 startups, with 2 new investments in the last 12 months alone. The firm has led 0 rounds, about 0% of its total and boasts 10 exits across its portfolio.

Investment Focus Highlights

  • Concentrates on Seed, Series A, Pre Seed rounds (top funding stages).
  • Majority of deals are located in United States, Nigeria, Singapore.
  • Strong thematic focus on Financial Services, Software, Banking.
  • Typical check size: $500K.

Stage Focus

  • Seed (59%)
  • Series A (24%)
  • Pre Seed (6%)
  • Series C (4%)
  • Series B (4%)
  • Series Unknown (2%)
  • Private Equity (2%)

Country Focus

  • United States (76%)
  • Nigeria (14%)
  • Singapore (6%)
  • Morocco (2%)
  • Brazil (2%)

Industry Focus

  • Financial Services
  • Software
  • Banking
  • Fintech
  • Artificial Intelligence (Ai)
  • E-commerce
  • Saas
  • Internet
  • Finance
  • Health Care
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FAQ

Frequently Asked Questions

Learn who this investor regularly partners with—both firms and angels—and explore their latest activity.

Who does Michael Seibel frequently co-invest with?

Western Technology Investment
North America, California, United States, Portola Valley
Co-Investments: 4
FundersClub
North America, California, United States, San Francisco
Co-Investments: 6
Liquid 2 Ventures
North America, California, United States, San Francisco
Co-Investments: 5
Y Combinator
North America, California, United States, Mountain View
Co-Investments: 21
SV Angel
North America, California, United States, San Francisco
Co-Investments: 7
Social Capital
North America, California, United States, Menlo Park
Co-Investments: 5
Cota Capital
North America, California, United States, San Francisco
Co-Investments: 4
Tiger Global Management
North America, New York, United States, New York
Co-Investments: 4
Tuesday Capital
North America, California, United States, San Francisco
Co-Investments: 4
Initialized Capital
North America, California, United States, San Francisco
Co-Investments: 7

Which angels does Michael Seibel often collaborate with?

JG
North America, California, United States, San Francisco
Shared Deals: 2
PB
North America, California, United States, Mountain View
Shared Deals: 8
TB
North America, California, United States, San Francisco
Shared Deals: 3
AL
North America, California, United States
Shared Deals: 2
Daniel Gross
North America, California, United States, San Francisco
Shared Deals: 2
ES
North America, California, United States, San Francisco
Shared Deals: 5
JK
North America, California, United States, San Francisco
Shared Deals: 6
KV
North America, California, United States, San Francisco
Shared Deals: 3
SA
North America, California, United States, San Francisco
Shared Deals: 3
Dalton Caldwell
North America, California, United States, San Francisco
Shared Deals: 3

What are some of recent deals done by Michael Seibel?

Arena

New York, New York, United States

Arena accelerates testing, debugging, and optimization for the world’s most advanced hardware.

Enterprise SoftwareSaaSSoftware
Series BApr 8, 2025
Amount Raised: $30,000,000
CTGT

San Francisco, California, United States

CTGT builds efficient, trustworthy AI, preventing errors and maximizing ROI with secure, reliable enterprise-grade solutions.

Artificial Intelligence (AI)B2BEnterpriseSaaS
SeedFeb 20, 2025
Amount Raised: $7,200,000
Dripos

New York, New York, United States

The only piece of software a coffee shop needs to operate.

Consumer SoftwareRestaurantsSaaSSoftware
Series AApr 24, 2024
Amount Raised: $11,000,000
Retell AI

San Francisco, California, United States

Retell AI offers an API for generating voice AI agents capable of engaging in interactions similar to humans.

Artificial Intelligence (AI)AudioDeveloper APIsDeveloper Tools
SeedApr 3, 2024
Amount Raised: $4,400,000
Superorder

San Francisco, California, United States

Superorder provides an all-in-one software platform.

Food DeliveryRestaurants
Series ASep 15, 2023
Amount Raised: $10,000,000
Artifact

San Francisco, California, United States

Artifact helps capture important memories with ease by creating personal podcasts with the people of customers choice.

FamilyFilm ProductionPodcastVideo on Demand
SeedDec 15, 2022
Amount Raised: $5,000,000
Emerge Career

New York, New York, United States

Emerge Career platform offers vocational training for people released from prison to get immediate jobs.

CommunitiesHuman ResourcesTraining
SeedNov 4, 2022
Amount Raised: $3,200,000
Golden

Claymont, Delaware, United States

Golden is a developer of a self-constructing knowledge database used to accelerate discovery and education.

Artificial Intelligence (AI)BlockchainMachine LearningNatural Language ProcessingSoftware
Series BOct 3, 2022
Amount Raised: $40,000,000
Motion

San Francisco, California, United States

Motion is an AI time management platform that provides real-time interventions, reminders, and analytics.

AnalyticsArtificial Intelligence (AI)Productivity ToolsReal TimeSoftware
Series ASep 19, 2022
Amount Raised: $13,000,000
GiveCampus

Washington, District of Columbia, United States

GiveCampus is a fundraising platform for nonprofit educational institutions.

EducationInternetSocial Network
Private EquitySep 19, 2022
Amount Raised: $50,000,000