YesWeHack
YesWeHack is a cybersecurity platform that combines bug bounty programs and automated penetration testing to help companies manage vulnerabilities. The Paris-based company has 778 employees and raised $51M in a Series C round in June 2024.
The growth story
YesWeHack grew from 114 to 778 employees between 2021 and 2026, raising $51M along the way, most recently a Series C in June 2024.
About
YesWeHack sells a platform that integrates bug bounty programs, automated penetration testing, and vulnerability management to help organizations secure their systems. Its customers include Louis Vuitton, Ferrero, and the European Commission.
The company has grown to 778 employees and recently closed a $51M Series C funding round. Its workforce includes 103 researchers, reflecting its focus on security testing.
Founders and leadership
YesWeHack is led by a team based in Paris, with its largest function being Research, which employs 103 people. The company operates with a median tenure of 2 years among its staff.
The YesWeHack org chart
Guillaume Vassault-Houlière (CEO - Co-Founder) leads 34 mapped leaders with 5 direct reports. Click +N to expand a team; names link to the person’s public profile.
Departments, and which ones grew
Headcount by function: Information Technology 276 (+43% YoY), Entrepreneurship 256 (+35% YoY), Engineering 47 (+38% YoY), Sales 28 (+8% YoY), Business Development 21 (+17% YoY), Research 17 (+31% YoY).
Talent flow
YesWeHack hires heavily from cybersecurity training platforms like Hack The Box, HackerOne, and TryHackMe. Alumni often move to other cybersecurity firms, with HackerOne being the most common destination.
Most common previous employers of YesWeHack staff: Hack The Box (7), HackerOne (6), TryHackMe (5), Digital Egypt Pioneers Initiative - DEPI (5), Bugcrowd (5), Orange Cyberdefense (4). Former YesWeHack employees most often moved to HackerOne (3), CyberTorch (2), Ateme (2), FULMICS - Organic Feed Additive (1), SecureDigital (1), Kwantom (1).
Alumni worth knowing
The YesWeHack mafia
YesWeHack alumni have founded 8 companies, including CyberDart and Exploit-Forge, which focus on cybersecurity and related fields.
8Nicoló Schiavi, was Ethical Hacker until 2021Babatunde A., was Penetration Tester until 2025Kristel Jade O., was Digital Marketing Manager - Global until 2022Rabih Achkar, MBA, was Regional Director - META until 2024Shrujal Mandawkar, was Bug Bounty Hunter until 2026Sharmaine Sierra, was Business Development Manager until 2020
Jasin Jusufi, was Application Security Specialist until 2024
Aliyu Ibrahim Usman, was Security Researcher until 2024Hiring now
Web traffic
Traffic mix: 47% direct, 43% search, 2% social, 1% paid.
What this company is made of
Most common skills at YesWeHack: Penetration Testing (395), Cybersecurity (351), Python (Programming Language) (323), Linux (244), Ethical Hacking (236), Network Security (219), Web Application Security (207), JavaScript (176).
Where the team actually sits
YesWeHack people are concentrated in Île-de-France, France (16), France (12), Cairo, Egypt (11), Maharashtra, India (10). 2 offices on record.
Search footprint
YesWeHack attracts about 1,769 organic search visits a month, traffic worth roughly $24K a month if bought through ads. It gained 509 ranking keywords and lost 609 in the last period.
What employees say
- Compensation
- 3.80 / 5
- Career opportunities
- 3.40 / 5
- Senior management
- 4.50 / 5
- Work-life balance
- 4.10 / 5
Frequently asked
YesWeHack has 778 employees as of September 2026.
YesWeHack has raised $51M in total, most recently a Series C round in June 2024.
YesWeHack was founded in 2015 by Guillaume Vassault-Houlière, Romain LECOEUVRE.
Guillaume Vassault-Houlière (CEO - Co-Founder) sits at the top of YesWeHack's reporting structure, with 5 direct reports.
The most common previous employers of current YesWeHack staff are Hack The Box (7 people), HackerOne (6 people), TryHackMe (5 people).
Former YesWeHack employees most often move to HackerOne (3), CyberTorch (2), Ateme (2).
At least 8 companies have a founder who previously worked at YesWeHack, including CyberDart, Exploit-Forge, Beyond Events Asia.
YesWeHack attracts about 1,769 organic search visits a month, worth roughly $24K a month in equivalent ad spend.
The most common skills among YesWeHack staff are Penetration Testing, Cybersecurity, Python (Programming Language), Linux, Ethical Hacking.
YesWeHack staff are concentrated in Île-de-France, France (16), France (12), Cairo, Egypt (11).
YesWeHack has about 276 people in Information Technology, up 43% over the past year, as of September 2026.
YesWeHack has about 256 people in Entrepreneurship, up 35% over the past year, as of September 2026.
Computed from 284 current and 165 former YesWeHack profiles, as of September 2026. Source: Crustdata.
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