01 Advisors

Venture Capital Active San Francisco, United States Est. 2018
Last updated 2026-06-18
Portfolio
4
in our dataset
Rounds participated
7
Rounds led
0
Rounds' value
$797.0M
total disclosed, rounds participated
Stages
A Round, B Round

About

​01 Advisors (01A) is a venture capital firm founded in 2018 by former Twitter executives Dick Costolo and Adam Bain, with David Fischer joining as a partner in 2023. Based in San Francisco and New York City, 01A focuses on investing in technology companies that have achieved product-market fit, typically at Series A and B stages. The firm's partners leverage their extensive experience in scaling companies to assist founders in transitioning from building a product to building a company.

Portfolio · 4

Investment activity

Portfolio by sector

Business Software2
Fintech & Insurtech1
Cyber Security1

Funds · 2

  • FUND III — $395M Nov 2023
  • Fund II — $325M Feb 2021

Q&A

What is 01 Advisors' primary investment focus?
01 Advisors focuses on investing in technology companies that have achieved product-market fit, typically at Series A and B stages. The firm's partners leverage their experience to assist founders in scaling companies.
When was 01 Advisors founded and by whom?
01 Advisors was founded in 2018 by former Twitter executives Dick Costolo and Adam Bain. David Fischer joined as a partner in 2023.
What are some of 01 Advisors' notable portfolio companies?
01 Advisors' portfolio includes companies such as Tipalti, which provides automation for supplier payments, and HoneyBook, a client management software.
What is the capital raised for 01 Advisors' most recent fund?
01 Advisors closed its FUND III in November 2023, raising $395 million.
What was the size of 01 Advisors' Fund II?
01 Advisors closed its Fund II in February 2021 with $325 million.
Which sectors does 01 Advisors frequently invest in?
01 Advisors shows a concentration in Fintech & Insurtech and Business Software sectors, with three rounds each, and also in Cyber Security.
What investment stages does 01 Advisors typically target?
01 Advisors primarily targets A Round and B Round investments, as indicated by their investment stages and the distribution of their rounds per stage.
Who are the founding partners of 01 Advisors?
The founding partners of 01 Advisors are Dick Costolo and Adam Bain, both serving as Managing Partners.
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