Fundraising Fox

Flow Club

YC S21

San Francisco, US · Founded 2020 · 6 employees · 9 known investors

Flow Club is a virtual coworking platform that facilitates focused productivity through live, structured sessions using body doubling and the Pomodoro Technique. It serves individual professionals, students, and remote workers seeking to improve focus and overcome procrastination.

Also known as Happy Rhinos Corporation

Founders & leadership· Y Combinator alumni (S21)

Flow Club was founded in 2020 by David Tran.

DTDavid Tran
David Tranin𝕏Co-Founder & CTODavid Tran co-founded Crowdbooster (later Upbeat), a Y Combinator-backed company from S2010, and was an early engineer at Alchemy before co-founding Flow Club.

Investors · 9

Also in the syndicate · 1

Paul Graham

Company profile

researched Aug 2026

Flow Club operates a virtual co-working platform on which members book scheduled video sessions and work quietly alongside one another. A session opens with the host asking each participant what they are working on; participants state goals aloud or in chat, a visible timer starts, and the group works in a muted deep-work block, optionally with focus music. At the end the host reconvenes the group for a debrief on progress. Sessions run from 30 minutes to three hours, with a 60-minute focus block the most popular format, and are capped at nine participants. Non-verbal, chat-only sessions are available for members who prefer not to speak, though the product encourages cameras on because visible presence is central to the body doubling mechanic.

The product is explicitly designed around techniques the company associates with attention and executive-function support: body doubling, distractibility delay, music stimulation, activity scheduling, dopaminergic design, the Pomodoro technique, and community. The company reports that 62% of 245 members surveyed identify as living with ADHD, and markets a design specifically oriented to neurodivergent users. Session agendas, shared task visibility, and a visible timer form the structural layer of the experience.

A second line, Flow Club for Communities, packages the same session software for community operators, integrating with Slack, Discord, Circle and Mighty so that members can organize co-working inside the platforms they already use. The company describes this offering as onboarding free pilots.

Founding story

Flow Club was founded in 2020; co-founder David Tran wrote the first line of code on January 1, 2021. Tran previously wrote the first lines of code for Alchemy and co-founded Crowdbooster/Upbeat (Y Combinator Summer 2010). Co-founder and CEO Ricky Yean holds a B.A. from Stanford University, has founded multiple venture-backed companies, and is a two-time Y Combinator alumnus. The company joined Y Combinator's Summer 2021 batch.

Business model

Flow Club sells a consumer subscription to its virtual co-working platform at $40 per month or $400 per year, with 50% discounts for full-time students, non-profit workers, and members who host a qualifying number of sessions. The company positions the subscription as expensable by employers as a productivity business expense, an ADHD workplace accommodation, or under a co-working or wellness stipend. Sessions are led by unpaid volunteer hosts drawn from the membership, who become eligible to host after attending 10 sessions, keeping session supply community-generated rather than staffed.

Recurring consumer subscription revenue: $40 per month or $400 per year, with 50% discounts for students, non-profit workers, and qualifying hosts. Employer reimbursement through business expense, ADHD accommodation, or wellness/co-working stipends is an encouraged payment path. The community-facing product is in a free pilot stage.

Traction

The company reports more than 1,200 hosts and over 400,000 co-working and body doubling sessions, totaling more than 3,000,000 hours, organized since 2021. In a survey of 265 members, 98% reported professional or academic improvement, 91% reported an increased ability to meet personal obligations, and 97% found it easier to start difficult tasks; 94% report feeling supported in their productivity journey. Among the 62% of 245 survey respondents identifying as having ADHD, 96% said they feel more in control of their ADHD, 89% experience less overwhelm, and 97% find it easier to start difficult tasks. Team size is listed as 6.

Latest developments

The company continues to operate its subscription co-working product and publishes content on body doubling, ADHD co-working and productivity methods. It has reported organizing more than 400,000 sessions totaling over 3,000,000 hours since 2021, and is onboarding free pilots for its Flow Club for Communities integration with Slack, Discord and Circle.

Full profile — market position, technology, go-to-market, geography, history

Market position

Flow Club describes itself as a leading body doubling and co-working community and reports more than 1,200 hosts and over 400,000 sessions organized since 2021. It has been covered by The New York Times, The Wall Street Journal, CNN and Computerworld in connection with body doubling and remote-work productivity. Y Combinator categorizes the company under consumer, community, productivity, health and wellness, and remote work.

Flow Club's sessions are hosted by volunteer peers rather than paid coaches or instructors, and it caps groups at nine people, which it argues is large enough to create accountability but small enough that individuals are not anonymous. The company grounds its session design in named research concepts — body doubling, Pomodoro intervals, activity scheduling and flow state as defined by Mihaly Csikszentmihalyi — and publishes member survey data and cumulative session volume as evidence. Its explicit orientation toward ADHD and neurodivergent users, including framing the subscription as a workplace accommodation, is a further positioning element.

Technology

A web-based scheduling and video co-working environment that provides session agendas, a shared visible timer, participant task lists, focus music (binaural, lofi and other options), and celebration mechanics at session close. Chat-only and camera-optional participation modes are supported. For communities, the software integrates with Slack, Discord, Circle and Mighty so members can schedule and join sessions from within those platforms.

Go-to-market

Flow Club acquires users through a free trial funnel on its website and converts them to a paid monthly or annual subscription. Growth is supported by its volunteer host model, which lets members create sessions after attending 10 sessions and earns them a 50% discount, and by referral links used by hosts. The company leans on press coverage — including The New York Times, The Wall Street Journal, CNN and Computerworld — and on member testimonials published as a "Wall of Love." A separate channel targets community operators through Flow Club for Communities, marketed via a waitlist and free pilots, and the company publishes resources to help members ask employers to expense the subscription.

Remote, independent and neurodivergent knowledge workers, with a substantial ADHD population among members. Testimonials come from professors, graduate students, writers, designers, freelancers, financial analysts and founders. A secondary segment is community operators running Slack, Discord, Circle or Mighty communities who want co-working for their members, such as Hustle Fund.

Geography

Headquartered in San Francisco, California, where both named founders are based. The product is delivered entirely online to a member base the company describes as spanning individuals around the world.

History

Flow Club was founded in 2020, and the first line of code was written on January 1, 2021 according to a company blog post published a year later. The company went through Y Combinator's Summer 2021 batch, with Harj Taggar as primary partner, presented at Demo Day, and raised $5M. It has organized more than 400,000 sessions since 2021. Alongside the individual consumer product, it introduced Flow Club for Communities, which brings co-working sessions into Slack, Discord, Circle and Mighty communities. The corporate entity behind the site is Happy Rhinos Corporation.

Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.

Key figures

latest reported
Coworking and body doubling sessions organized since 2021Jan 2026400,000 sessions
Cumulative coworking hoursJan 20263,000,000 hours
HeadcountAug 202615
HostsJan 20261,200 hosts
Maximum participants per sessionJan 20269 people
Members reporting increased ability to meet personal obligationsJan 202691%
Members reporting it is easier to start difficult tasksJan 202697%
Members reporting professional or academic improvementJan 202698%
Members reporting they feel supported in their productivity journeyJan 202694%
Subscription price (annual)Jan 2026$400
Subscription price (monthly)Jan 2026$40
Survey respondents identifying as living with ADHDJan 202662%
Team sizeJan 20266 employees

Company-reported or press-reported figures, each dated to when it was claimed — not independently audited.

Competitors · 5

by search overlap

Companies competing with Flow Club for the same Google search keywords, organic and paid, via search-intersection analysis.

Timeline · 3

launches, deals, and filings
Jan 2022
Flow Club for Communities

Offering that lets community operators run co-working sessions inside Slack, Discord, Circle or Mighty, onboarded via free pilots and a waitlist.

source ↗

Jan 2021
Raised $5M following Y Combinator Summer 2021 Demo Day

Flow Club presented at Y Combinator's Summer 2021 Demo Day and raised $5M, backed by Worklife Ventures and other investors including Paul Graham and founders of Dropbox, Mercury, Quora, Outschool and Sendbird.

$5M source ↗

Jan 2021
First line of code written for Flow Club

A blog note dated one year later states that David wrote the first line of code for Flow Club on that date in 2021.

source ↗

Dated company events from announcements, filings, and press; legal rows summarize public dockets and regulator releases.

In the news

Research sources · 8

primary sources listed

8 public sources were cited for this profile; the first-party ones are listed here.

Frequently asked questions

What does Flow Club do?
Flow Club runs subscription virtual co-working sessions built on body doubling, with a focus on ADHD and remote knowledge workers.
Who founded Flow Club?
Flow Club was founded by David Tran in 2020.
Who are Flow Club's investors?
Flow Club's investors include Y Combinator, Day One Ventures, Hustle Fund, Hyphen Capital, Night Capital, NOMO Ventures, Soma Capital, Worklife Ventures.
Where is Flow Club headquartered?
Flow Club is headquartered in San Francisco, US.