Thirdfort
Thirdfort sells fraud prevention software for regulated professionals, used by over 1,500 businesses. The London-based company raised $25M in a Series A round in March 2022 and employs 116 people.
The growth story
Thirdfort grew from 52 to 116 employees between 2021 and 2026, raising $25M along the way, most recently a Series A in March 2022.
About
Thirdfort provides a platform that automates identity verification, anti-money laundering checks, and source of funds analysis for professionals in regulated industries. Its tools aim to simplify compliance with evolving fraud prevention regulations.
The company was founded in 2017 after its co-founders witnessed a £25,000 property fraud. It has since grown to serve over 1,500 businesses and raised $25M in venture funding, with investors including Alexander Chesterman and Charles Delingpole.
Founders and leadership
Engineering is Thirdfort's largest function, with 23 employees. The company has a median tenure of 2 years, suggesting moderate turnover among its 116-person workforce.
The Thirdfort org chart
Olly Thornton-Berry (Co-founder and CEO) leads 45 mapped leaders with 2 direct reports. Click +N to expand a team; names link to the person’s public profile.
Departments, and which ones grew
Headcount by function: Engineering 26 (-7% YoY), Customer Success and Support 18 (+13% YoY), Operations 12 (-14% YoY), Sales 12 (0% YoY), Business Development 7 (0% YoY), Information Technology 6 (+100% YoY).
Talent flow
Thirdfort recruits heavily from Deloitte, Monzo, and Barclays Investment Bank. Its alumni frequently move to Monzo, monday.com, and Kyckr. Employees come from universities including Loughborough, Durham, and Moratuwa.
Most common previous employers of Thirdfort staff: Deloitte (4), Monzo (3), Barclays Investment Bank (2), Cisco (2), Ometria (2), Persistent (2). Former Thirdfort employees most often moved to Monzo (4), monday.com (2), Felk (2), Kyckr (2), Legora (2), Zencargo (2).
Alumni worth knowing
The Thirdfort mafia
Thirdfort alumni have founded 10 companies, including JustFund (86 employees), Felk (7 employees), and Sientia (5 employees).
11Jack O'Donnell, was Head of Business Development until 2021Uditha Atukorala, was Founding CTO until 2022Billy Lapatas, was Software Engineer until 2023Lorenzo Turrino, was Lead DevOps Engineer until 2024Kate Margolis, was Head Of Design until 2022
Pete Donell, was Chief Financial Officer until 2024
Anna Keren, was Chief Technology and Product Officer until 2024
Sinead O., was Senior React Native Developer until 2025
Max Girkins, was Software Engineer until 2020Hiring now
Web traffic
Traffic mix: 38% direct, 51% search, 1% social, 0% paid.
What this company is made of
Most common skills at Thirdfort: Customer Service (45), Teamwork (38), Communication (36), Microsoft Office (31), Microsoft Excel (28), Leadership (27), Time Management (26), Management (26).
Where the team actually sits
Thirdfort people are concentrated in England, United Kingdom (62), United Kingdom (17), London Area, United Kingdom (6), Manchester Area, United Kingdom (5).
Search footprint
Thirdfort attracts about 183 organic search visits a month, traffic worth roughly $1K a month if bought through ads. It gained 134 ranking keywords and lost 94 in the last period.
What employees say
- Compensation
- 4.40 / 5
- Career opportunities
- 4.10 / 5
- Senior management
- 4.30 / 5
- Work-life balance
- 4.50 / 5
Frequently asked
Thirdfort has 116 employees as of September 2026.
Thirdfort has raised $25M in total, most recently a Series A round in March 2022.
Thirdfort was founded in 2017 by Olly Thornton-Berry, Jack Bidgood.
Olly Thornton-Berry (Co-founder and CEO) sits at the top of Thirdfort's reporting structure, with 2 direct reports.
The most common previous employers of current Thirdfort staff are Deloitte (4 people), Monzo (3 people), Barclays Investment Bank (2 people).
Former Thirdfort employees most often move to Monzo (4), monday.com (2), Felk (2).
At least 10 companies have a founder who previously worked at Thirdfort, including JustFund, Felk, Sientia.
Thirdfort attracts about 183 organic search visits a month, worth roughly $1K a month in equivalent ad spend.
The most common skills among Thirdfort staff are Customer Service, Teamwork, Communication, Microsoft Office, Microsoft Excel.
Thirdfort staff are concentrated in England, United Kingdom (62), United Kingdom (17), London Area, United Kingdom (6).
Thirdfort has about 26 people in Engineering, down 7% over the past year, as of September 2026.
Thirdfort has about 18 people in Customer Success and Support, up 13% over the past year, as of September 2026.
Computed from 96 current and 147 former Thirdfort profiles, as of September 2026. Source: Crustdata.
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