Sonio
Sonio develops AI-powered workflow software for prenatal ultrasound examinations. The Boston-based company, acquired by Samsung Medison in 2024, has raised $30 million and employs 110 people.
The growth story
Sonio grew from 24 to 110 employees between 2021 and 2026, raising $30M along the way, most recently a Series A in July 2023.
About
Sonio sells software that helps ultrasound practitioners manage prenatal exams and diagnoses. Its AI-enhanced tools aim to improve workflow efficiency and ensure exam completeness, built on five years of research in fetal medicine and AI.
The company raised $30 million in a Series A round in July 2023 before being acquired by Samsung Medison the following year. With 110 employees, Sonio has established itself in the medical software space, though its recent headcount growth rate is unclear.
Founders and leadership
Engineering is Sonio's largest function, with 23 employees. The company operates with a median tenure of two years, suggesting moderate staff turnover. Its leadership structure reflects its recent acquisition by Samsung Medison.
The Sonio org chart
Cecile Brosset Dubois (Co-founder & CEO) leads 46 mapped leaders with 3 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 30 (+36% YoY), Sales 10 (-9% YoY), Product Management 8 (+33% YoY), Information Technology 8 (+33% YoY), Operations 7 (-12% YoY), Healthcare Services 5 (+25% YoY).
Talent flow
Sonio recruits heavily from French academic institutions, with Université Paris Cité, CentraleSupélec, and École Polytechnique as top sources. Alumni frequently move to healthcare and tech companies, with Parallel and IQVIA being common destinations.
Most common previous employers of Sonio staff: Université Paris Cité (3), Inria (3), CMAP Ecole Polytechnique (3), EOS imaging (3), BNP Paribas (2), Bain & Company (2). Former Sonio employees most often moved to Parallel (2), IQVIA (2), OneRagtime (1), Elaia (1), Université Paris Cité médecine (1), Mytheresa (1).
Alumni worth knowing
The Sonio mafia
Sonio alumni have founded six companies, including Cross-Border Impact Ventures and DataWyse. These ventures span healthcare consulting, investment, and clinical workflow solutions, reflecting Sonio's medical software expertise.
6Megan Dover, was Board Observer, Board of Directors (company acquired by Samsung) until 2024Adithya Anilkumar, was Software Developer until 2022Rayan Souissi, was Product Manager until 2024MERYEM YOUSFI, was Head of Marketing until 2026Jeanne Sottile RDMS RVT, was Senior Account Manager until 2025Romain Calard, was Sr Client Success Manager until 2024Web traffic
Traffic mix: 0% direct, 0% search, 0% social, 0% paid.
What this company is made of
Most common skills at Sonio: Project Management (44), Microsoft Office (39), Python (Programming Language) (36), English (33), Microsoft Excel (25), Teamwork (23), SQL (23), Management (22).
Where the team actually sits
Sonio people are concentrated in Île-de-France, France (32), Greater Paris Metropolitan Region (14), France (6), Greater Boston (5).
Search footprint
Sonio attracts about 115 organic search visits a month, traffic worth roughly $4K a month if bought through ads. It gained 97 ranking keywords and lost 83 in the last period.
What employees say
- Compensation
- 4.00 / 5
- Career opportunities
- 4.00 / 5
- Senior management
- 4.00 / 5
- Work-life balance
- 3.00 / 5
Frequently asked
Sonio has 110 employees as of September 2026.
Sonio has raised $30M in total, most recently a Series A round in July 2023.
Sonio was founded in 2020 by Cecile Brosset Dubois, Yves Ville, Erwan LE PENNEC, Remi Besson, Julien Stirnemann.
Cecile Brosset Dubois (Co-founder & CEO) sits at the top of Sonio's reporting structure, with 3 direct reports.
The most common previous employers of current Sonio staff are Université Paris Cité (3 people), Inria (3 people), CMAP Ecole Polytechnique (3 people).
Former Sonio employees most often move to Parallel (2), IQVIA (2), OneRagtime (1).
At least 6 companies have a founder who previously worked at Sonio, including Cross-Border Impact Ventures, DataWyse, Kara Gold.
Sonio attracts about 115 organic search visits a month, worth roughly $4K a month in equivalent ad spend.
The most common skills among Sonio staff are Project Management, Microsoft Office, Python (Programming Language), English, Microsoft Excel.
Sonio staff are concentrated in Île-de-France, France (32), Greater Paris Metropolitan Region (14), France (6).
Sonio has about 30 people in Engineering, up 36% over the past year, as of September 2026.
Sonio has about 10 people in Sales, down 9% over the past year, as of September 2026.
Computed from 87 current and 89 former Sonio profiles, as of September 2026. Source: Crustdata.
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