Pentera
Pentera is a cybersecurity company that tests enterprise defenses by simulating real-world attacks across cloud, on-premise and external environments. The Burlington, Massachusetts-based firm has raised $250 million and employs 466 people.
The growth story
Pentera grew from 129 to 466 employees between 2021 and 2026, raising $250M along the way, most recently a Series D in March 2025.
About
Pentera sells automated security validation software to enterprise security teams. Its AI-powered platform mimics real-world attacks to identify exploitable vulnerabilities, prioritize fixes based on impact, and quantify risk reduction for leadership.
The company has raised $250 million, most recently in a Series D round in March 2025. It employs 466 people, with sales being the largest function at 73 staff.
Founders and leadership
Pentera's largest department is sales, which accounts for 73 of its 466 employees. The company is led by founders from Israel's cybersecurity sector and maintains its headquarters in Burlington, Massachusetts.
The Pentera org chart
Amitai Ratzon (Chief Executive Officer) leads 59 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: Engineering 107 (+26% YoY), Sales 98 (+2% YoY), Information Technology 65 (+7% YoY), Customer Success and Support 32 (+28% YoY), Business Development 23 (+10% YoY), Marketing 21 (+11% YoY).
Talent flow
Pentera recruits heavily from Israel's military and cybersecurity sectors, with 15 hires from the Israel Defense Forces and 12 from Check Point Software. Alumni often move to other cybersecurity firms, with Horizon3.ai hiring 7 former Pentera employees.
Most common previous employers of Pentera staff: Israel Defense Forces (15), Check Point Software (12), Israeli Military Intelligence - Unit 8200 (8), Hewlett Packard Enterprise (8), Rapid7 (8), Ping Identity (8). Former Pentera employees most often moved to Horizon3.ai (7), Palo Alto Networks (3), Wallarm (3), Anecdotes (2), Semperis (2), Akamai Technologies (2).
Alumni worth knowing
The Pentera mafia
Pentera alumni have founded 7 companies, including StudioYT, CS Cyber Shield and Clarier.ai. These startups employ between 1 and 5 people each.
7Pankaj Sharma, was Regional Sales Manager, Middle East & Africa until 2023Markus Schmitt, was Enterprise Account Manager until 2022Adam Pfefer, was Advisory Board Member until 2023Deborah Laks Du Bois, was Director of Field & Channel Partnerships until 2024Yonit Tanenbaum, was Fractional Brand & Product Marketing until 2020Marcel Groenewald, was AM Team Leader, EMEA& APAC until 2025
Brian S. McGuane, MSA, CPA, was Controller, The Americas until 2025Hiring now
Web traffic
Traffic mix: 60% direct, 26% search, 11% social, 0% paid.
What this company is made of
Most common skills at Pentera: Management (113), Python (Programming Language) (107), Microsoft Office (98), Leadership (96), Sales (95), Cybersecurity (94), Linux (93), Project Management (88).
Where the team actually sits
Pentera people are concentrated in Israel (47), Tel Aviv District, Israel (43), Massachusetts, United States (18), Greater Boston (13).
Search footprint
Pentera attracts about 4,225 organic search visits a month, traffic worth roughly $42K a month if bought through ads. It gained 530 ranking keywords and lost 424 in the last period.
What employees say
- Compensation
- 4.50 / 5
- Career opportunities
- 4.40 / 5
- Senior management
- 4.40 / 5
- Work-life balance
- 4.30 / 5
Frequently asked
Pentera has 466 employees as of September 2026.
Pentera has raised $250M in total, most recently a Series D round in March 2025.
Pentera was founded in 2015 by Arik Faingold.
Amitai Ratzon (Chief Executive Officer) sits at the top of Pentera's reporting structure, with 5 direct reports.
The most common previous employers of current Pentera staff are Israel Defense Forces (15 people), Check Point Software (12 people), Israeli Military Intelligence - Unit 8200 (8 people).
Former Pentera employees most often move to Horizon3.ai (7), Palo Alto Networks (3), Wallarm (3).
At least 7 companies have a founder who previously worked at Pentera, including StudioYT, CS Cyber Shield, Clarier.ai.
Pentera attracts about 4,225 organic search visits a month, worth roughly $42K a month in equivalent ad spend.
The most common skills among Pentera staff are Management, Python (Programming Language), Microsoft Office, Leadership, Sales.
Pentera staff are concentrated in Israel (47), Tel Aviv District, Israel (43), Massachusetts, United States (18).
Pentera has about 107 people in Engineering, up 26% over the past year, as of September 2026.
Pentera has about 98 people in Sales, up 2% over the past year, as of September 2026.
Computed from 246 current and 209 former Pentera profiles, as of September 2026. Source: Crustdata.
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