/Companies

Inflow

AcquiredYC S21

London, GB · Founded 2020 · 20 employees · 10 known investors

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Inflow is an app-based program providing personalized coaching, strategies, and tools to help people with ADHD manage their condition. The platform combines clinical guidance from psychology experts with a supportive community, designed to make mental health support affordable and accessible for neurodiverse individuals.

Also known as InFlow · Inflow ADHD

BiotechConsumerDigital HealthHealthtechMental HealthSaaSMental Health TechConsumer Health ServicesUnited KingdomUnited States of AmericaEuropeAmerica / CanadaPartly Remote

Founders & leadership· Y Combinator alumni (S21)

Inflow was founded in 2020 by Levi Epstein and Seb Isaacs.

LELevi Epstein
Levi EpsteinCo-FounderLevi Epstein is co-founder of Inflow and previously worked as a product manager at Babylon Health. He studied at the London School of Economics and Imperial College London.
SISeb Isaacs
Seb IsaacsFounderSeb Isaacs is the founder of Inflow, an app-based platform offering personalized coaching and tools for people with ADHD.
DS
Dr. Sachs

Investors · 10

Also in the syndicate · 2

Rhythm VCRoute66 Ventures

Funding

SEC filings, press & company announcements

$11M disclosed across 1 of 4 rounds · 2022–2023

Source: company announcements and press reports — follow each round's link for the claim.

Company profile

researched Aug 2026

Inflow is a London-based digital health company that develops a subscription self-help app for adults with attention deficit hyperactivity disorder (ADHD). The product is built around cognitive behavioral therapy (CBT) techniques and delivers psychoeducation, daily exercises and challenges focused on habit development, ADHD-oriented mindfulness practices, and community support. Members can also join group and community sessions, including live events hosted by qualified clinicians and in-app coaches.

The company describes the app as an affordable and accessible route to managing ADHD symptoms, created in response to barriers to behavioral health care such as long clinician wait times and administrative hurdles. Its founding team includes a clinical psychologist with more than a decade of experience treating ADHD in children and adults, and the company has said the app was developed "by people with ADHD for people with ADHD." In November 2022 Inflow expanded beyond self-help content into telehealth through the acquisition of Lina Health.

Founding story

Inflow was founded in London in 2020 by Levi Epstein, Seb Isaacs and Dr. George Sachs. Sachs is a clinical psychologist with more than a decade of experience treating ADHD in children and adults. According to the founders, the app was created in response to difficulties people face accessing behavioral health clinicians, including long wait times and bureaucratic hurdles, and was built by people with ADHD for people with ADHD. Co-founder Levi Epstein previously worked as a product manager at Babylon Health and studied at the London School of Economics and Imperial.

Business model

Inflow sells a direct-to-consumer subscription to its ADHD self-management app. New users receive a seven-day free trial, after which they convert to a monthly or annual plan; the annual plan was reported at around $200 per year. Beyond app content, the company offers group and community-based support and live events led by qualified clinicians and in-app coaches, and it expanded into telehealth services via its acquisition of Lina Health.

Consumer subscription revenue following a seven-day free trial, billed monthly or annually, with the annual option priced at approximately $200 per year.

Traction

Inflow reported preliminary open-study results indicating that members experienced a decrease in ADHD symptoms and impairment, and published a peer-reviewed feasibility and usability study in August 2022. The company had raised $14 million in total since its 2020 founding as of January 2023 and reported a team size of 20 on its Y Combinator profile.

Latest developments

In January 2023 Inflow closed an $11 million Series A led by Octopus Ventures with participation from existing investors Hoxton Ventures and Route66 Ventures, earmarked for product development and hiring, and added Octopus health tech partner Will Gibbs to its board. This followed the November 2022 acquisition of telehealth company Lina Health. Y Combinator's directory lists the company's status as acquired.

▸Full profile — market position, technology, go-to-market, geography, history, risks & controversies

Market position

Inflow operates in the digital ADHD care market alongside companies addressing diagnosis, coaching, telehealth and medication management, including Done, Cerebral, Brili, Tiimo and Elemy, and within the broader growth of self-therapy applications. Co-founder Seb Isaacs has positioned the company as taking a more holistic approach spanning the full ADHD care journey.

The company positions itself as covering all aspects of the ADHD care journey rather than a single element such as diagnosis, coaching or medication, combining CBT-based self-help content with clinician- and coach-led community support and, following the Lina Health acquisition, telehealth. It also emphasizes peer-reviewed research on the app and involvement of a clinical psychologist co-founder.

Technology

A mobile self-help application delivering CBT-based content, psychoeducation, daily exercises and challenges around habit formation, ADHD-focused mindfulness techniques, and community features. The company has pursued clinical validation: co-founder Dr. George Sachs and colleagues published a peer-reviewed feasibility and usability study of the app in August 2022, and the company said it planned a broader randomized controlled trial to assess efficacy. Preliminary open-study testing was reported to show decreases in members' ADHD symptoms and impairment.

Go-to-market

Direct-to-consumer distribution of the app with a free seven-day trial converting to paid subscription, supplemented by clinician- and coach-led community programming. The company said proceeds from its Series A would fund product development and headcount growth.

Adults living with ADHD who are seeking self-management tools; the company frames its offering as an option for people facing long waits and cost barriers in accessing behavioral health clinicians. ADHD is described as affecting as much as 10% of the global population, with one estimate placing U.S. prevalence at 3.5%.

Geography

Headquartered in London, United Kingdom, with a consumer app offering; investor base spans the UK and the United States.

History

The company was founded in 2020 in London and took part in Y Combinator's Summer 2021 batch. In January 2022 it announced a $2.3 million seed round led by Hoxton Ventures. In August 2022 the founding team published a peer-reviewed feasibility and usability study of the app, and in November 2022 Inflow acquired Lina Health to move into telehealth. In January 2023 the company announced an $11 million Series A led by Octopus Ventures, bringing total funding raised since founding to $14 million, with Octopus health tech partner Will Gibbs joining the board. Y Combinator's company directory subsequently listed Inflow's status as acquired.

Risks & controversies

Reporting notes that companies treating ADHD via telehealth and medication management have faced increased scrutiny in recent years, as loosened federal prescribing regulations in the U.S. drove membership growth; virtual pharmacy TruePill, a partner to several telehealth companies, faced Drug Enforcement Administration action against its license over controlled-substance prescriptions. Inflow's efficacy evidence at the time of its Series A was limited to a feasibility and usability study and preliminary open-study results, with a randomized controlled trial still planned.

Compiled by commissioned research from 7 cited public sources — announcements, filings, and press listed under research sources below.

Key figures

latest reported
Annual subscription priceJan 2023$200
Team sizeJan 202320 employees
Total funding raised since foundingJan 2023$14M

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

Related companies · 6

TerapifyTerapify is an online mental health platform that connects users with licensed psychologists for individual and couple therapy sessions, along with supplementary wellness content such as yoga classes and guided meditations. The service operates across Latin America and serves Spanish-speaking users seeking accessible virtual mental health care.
Daybreak HealthDaybreak Health provides mental health support services to schools, helping school districts build and manage student mental health programs serving over 1 million students across the U.S. The company supports school leaders in hiring clinicians, delivering care, and measuring impact in youth mental health.
PsychcentralPsych Central is a digital publisher providing informational content on mental health, wellness, and medical topics developed in collaboration with licensed medical professionals. The company serves general audiences seeking educational resources on health conditions and treatments.
Deep MeditateDeep Meditate is a mobile app offering meditation, music, and sleep programs designed to reduce stress and build mental resilience. The app targets individuals seeking stress relief and improved sleep quality.
Choosing TherapyChoosingTherapy.com is an online publication producing evidence-based guides on mental health, psychology, relationships, and parenting, written and medically reviewed by licensed therapists and medical professionals. It also runs a directory connecting consumers with local and online therapists.
Joon HealthJoon is a mobile app that helps children ages 6-12 build executive functioning and positive habits through gamified task management, targeting parents seeking to reduce behavioral friction around chores, homework, and daily routines.

Companies working in the same space as Inflow.

Timeline · 6

launches, deals, and filings
Jan 2023
Inflow raises $11M Series A led by Octopus Ventures

Inflow announced an $11 million Series A round led by Octopus Ventures with participation from existing investors Hoxton Ventures and Route66 Ventures, to be used for product development and team expansion.

$11M source ↗

Jan 2023
Will Gibbs of Octopus Ventures joins Inflow board

Will Gibbs, health tech partner at Octopus Ventures, joined Inflow's board in connection with the Series A round.

source ↗

Nov 2022
Inflow acquires Lina Health

Inflow expanded into telehealth through the acquisition of Lina Health.

source ↗

Aug 2022
Peer-reviewed feasibility and usability study published

Co-founder Dr. George Sachs and colleagues published a peer-reviewed feasibility and usability study of the Inflow app; a broader randomized controlled trial was planned.

source ↗

Jan 2022
Inflow raises $2.3M seed round led by Hoxton Ventures

Inflow announced a $2.3 million seed round led by Hoxton Ventures.

$2.3M source ↗

Jan 2021
Participated in Y Combinator Summer 2021 batch

Inflow was part of Y Combinator's Summer 2021 batch, with Harj Taggar as primary partner.

source ↗

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

Companies House · registry record

View on Companies House ↗
Registered name
INFLOW LTD
Company number
07926271
Status
Dissolved
Company type
Private limited company
Incorporated
27 Jan 2012
Dissolved
25 Sept 2018
Registered office
44 Oakdale Close, Halifax, HX3 5RP
Nature of business (SIC)
85410 — Post-secondary non-tertiary education85421 — First-degree level higher education
Previous names
THE PROFESSIONAL HEALTH CARE SOLUTIONS LTD (2012–2012)
Accounts
last made up to 30 May 2017

Current officers

  • Muhammad Sarmad Sabir — secretary, appointed 27 Jan 2012
  • Waseem Ahmed — director, appointed 27 Jan 2012
  • Muhammad Sarmad Sabir — director, appointed 1 Feb 2014

Source: Companies House public register · retrieved 24 Jul 2026. Contains public sector information licensed under the Open Government Licence v3.0.

In the news

▸Research sources · 7

primary sources listed

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

Frequently asked questions

What does Inflow do?
London-based developer of a self-help app that helps people manage ADHD using cognitive behavioral therapy techniques.
Who founded Inflow?
Inflow was founded by Levi Epstein, Seb Isaacs in 2020.
Who are Inflow's investors?
Inflow's investors include Hoxton Ventures, Octopus Ventures, Y Combinator, Antler, octopus investments, Platform 45, Route 66 Ventures, WorldQuant Ventures.
How much funding has Inflow raised?
Inflow has disclosed $11M raised across 1 of its 4 known rounds.
Where is Inflow headquartered?
Inflow is headquartered in London, GB.