InfoSum
InfoSum provides a secure data collaboration platform that allows companies to share customer insights without exposing raw data. The London-based company has raised $88M, most recently in a 2021 Series B, and employs 75 people.
The growth story
InfoSum grew from 56 to 75 employees between 2020 and 2026, raising $88M along the way, most recently a Series B in August 2021.
About
InfoSum sells software that lets companies analyze combined customer datasets without moving or sharing the underlying data. Its patented technology is used by businesses that want to collaborate on customer insights while maintaining privacy.
The company has grown steadily since its 2015 founding, reaching 75 employees. Its $88M in funding includes investments from major players like Experian and ITV, suggesting traction in the data and media sectors.
Founders and leadership
Engineering is InfoSum's largest function, with 17 employees. The company has a median tenure of 2 years, indicating moderate turnover.
The InfoSum org chart
Marc Milgrim (Chief of Staff to the CEO) leads 34 mapped leaders with 11 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 28 (+33% YoY), Customer Success and Support 11 (+83% YoY), Information Technology 7 (+40% YoY), Sales 3 (-50% YoY), Business Development 3 (-25% YoY), Arts and Design 3 (0% YoY).
Talent flow
InfoSum recruits heavily from data and analytics firms like Nielsen, Dynata, and LiveRamp. Alumni frequently move to advertising and marketing companies, with WPP being the top destination.
Most common previous employers of InfoSum staff: Nielsen (3), Dynata (2), LiveRamp (2), Captify® (2), Daily Mail (2), Comscore (2). Former InfoSum employees most often moved to WPP (10), Publicis Media (2), TransUnion (2), GVTLabs (2), dunnhumby (2), The Trade Desk (2).
Alumni worth knowing
The InfoSum mafia
InfoSum alumni have founded 10 companies, including WPP Media and TAU Marketing Solutions. Several startups like GVTLabs and Nexida remain small, with fewer than 15 employees.
11Brian Lesser, was Chairman and CEO until 2024Robert Webster, was Director, Strategy Consulting until 2020Trip Foster, was SVP, Partnerships (Acquired by WPP) until 2021Nick Halstead, was Founder & CTO until 2022Danvers Baillieu, was President, Legal and Business Affairs until 2022Christopher Reher, was Member of the Advisory Board until 2025
Joanna Miller, was VP, Product Operations until 2023
Lou Robinson, was Senior QA Engineer until 2021
Raffaella Riccato, was Data Scientist until 2024
Cam McAllister, was VP Engineering Operations and Programme Management until 2025
Riki Dolby, was Consultant until 2023Hiring now
Web traffic
Traffic mix: 47% direct, 37% search, 5% social, 1% paid.
What this company is made of
Most common skills at InfoSum: Communication (18), Digital Marketing (18), Leadership (18), Management (16), Social Media (16), Business Development (16), Data Analysis (16), Microsoft Office (16).
Where the team actually sits
InfoSum people are concentrated in England, United Kingdom (28), United Kingdom (9), New York, United States (6), New York City Metropolitan Area (4). 5 offices on record.
Search footprint
InfoSum attracts about 434 organic search visits a month, traffic worth roughly $1K a month if bought through ads. It gained 122 ranking keywords and lost 103 in the last period.
What employees say
- Compensation
- 4.30 / 5
- Career opportunities
- 3.80 / 5
- Senior management
- 3.80 / 5
- Work-life balance
- 4.30 / 5
Frequently asked
InfoSum has 75 employees as of September 2026.
InfoSum has raised $88M in total, most recently a Series B round in August 2021.
Marc Milgrim (Chief of Staff to the CEO) sits at the top of InfoSum's reporting structure, with 11 direct reports.
The most common previous employers of current InfoSum staff are Nielsen (3 people), Dynata (2 people), LiveRamp (2 people).
Former InfoSum employees most often move to WPP (10), Publicis Media (2), TransUnion (2).
At least 10 companies have a founder who previously worked at InfoSum, including WPP Media, TAU Marketing Solutions, GrowthCode.
InfoSum attracts about 434 organic search visits a month, worth roughly $1K a month in equivalent ad spend.
The most common skills among InfoSum staff are Communication, Digital Marketing, Leadership, Management, Social Media.
InfoSum staff are concentrated in England, United Kingdom (28), United Kingdom (9), New York, United States (6).
InfoSum has about 28 people in Engineering, up 33% over the past year, as of September 2026.
InfoSum has about 11 people in Customer Success and Support, up 83% over the past year, as of September 2026.
Computed from 57 current and 160 former InfoSum profiles, as of September 2026. Source: Crustdata.
Build this for any company
Every number on this page came from the Crustdata API. Point the MCP at a company and get the same org chart, alumni list and talent flow in one prompt.