Guardio
Guardio is a cybersecurity company that makes browser extensions protecting over 1 million users from online threats like phishing and malicious extensions. It has raised $127M, including a Series B in late 2025.
The growth story
Guardio grew from 29 to 160 employees between 2021 and 2026, raising $127M along the way, most recently a Series B in November 2025.
About
Guardio sells browser security software primarily to individuals and small businesses. Its extension blocks scams, phishing attempts, and harmful browser add-ons through real-time monitoring.
The company reached 1 million users and secured $127M in funding within seven years of founding. Its Series B suggests continued investor confidence in its growth trajectory despite no recent headcount growth data.
Founders and leadership
Engineering makes up the largest function with 27 employees. The leadership team combines cybersecurity expertise with product and marketing backgrounds, reflecting the company's focus on both technical protection and user adoption.
The Guardio org chart
Amos P. (CEO & Co-Founder) leads 60 mapped leaders with 9 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 35 (+30% YoY), Information Technology 29 (+32% YoY), Product Management 13 (+63% YoY), Marketing 11 (-27% YoY), Research 9 (+125% YoY), Arts and Design 8 (+14% YoY).
Talent flow
Nearly a quarter of analyzed employees came from Israeli military and intelligence units, including 22 from the Israel Defense Forces. The company recruits heavily from local tech firms like Playtika and Wix, with Tel Aviv University as the top alma mater.
Most common previous employers of Guardio staff: Israel Defense Forces (22), Office of the Prime Minister of Israel (10), Playtika (9), Wix (8), Israeli Air Force (8), Israeli Military Intelligence (7). Former Guardio employees most often moved to Arpeely (4), Navan (2), HoneyBook (2), Fullpath (2), monday.com (2), Kape Technologies (2).
Alumni worth knowing
The Guardio mafia
Four Guardio alumni have founded companies, including Anymark (with 3 former staff) and Crimbo.AI. The ventures span cybersecurity, recruitment tech, and AI tools.
4Raanan Tzory, was Senior Director of Product & Growth | B2B Business Line Management, Product Management until 2023Izhar Fine, was Senior Backend Developer until 2026Eli Englard, was Customer Success Specialist until 2026Anna Feldman, was Product Operations Manager until 2025Hiring now
Web traffic
Traffic mix: 22% direct, 3% search, 3% social, 44% paid.
What this company is made of
Most common skills at Guardio: SQL (59), Python (Programming Language) (55), Management (43), Microsoft Excel (37), Analytical Skills (35), Teamwork (34), JavaScript (34), Data Analysis (34).
Where the team actually sits
Guardio people are concentrated in Tel Aviv District, Israel (71), Israel (48), Center District, Israel (10), Florida, United States (1).
Search footprint
Guardio attracts about 14,610 organic search visits a month, traffic worth roughly $116K a month if bought through ads. It gained 3,062 ranking keywords and lost 2,485 in the last period.
What employees say
- Compensation
- 4.20 / 5
- Career opportunities
- 3.90 / 5
- Senior management
- 3.70 / 5
- Work-life balance
- 3.50 / 5
Frequently asked
Guardio has 160 employees as of September 2026.
Guardio has raised $127M in total, most recently a Series B round in November 2025.
Guardio was founded in 2018 by Amos P., Michael Vainshtein, Daniel Sirota.
Amos P. (CEO & Co-Founder) sits at the top of Guardio's reporting structure, with 9 direct reports.
The most common previous employers of current Guardio staff are Israel Defense Forces (22 people), Office of the Prime Minister of Israel (10 people), Playtika (9 people).
Former Guardio employees most often move to Arpeely (4), Navan (2), HoneyBook (2).
At least 4 companies have a founder who previously worked at Guardio, including Anymark, Crimbo.AI, Getajob.careers.
Guardio attracts about 14,610 organic search visits a month, worth roughly $116K a month in equivalent ad spend.
The most common skills among Guardio staff are SQL, Python (Programming Language), Management, Microsoft Excel, Analytical Skills.
Guardio staff are concentrated in Tel Aviv District, Israel (71), Israel (48), Center District, Israel (10).
Guardio has about 35 people in Engineering, up 30% over the past year, as of September 2026.
Guardio has about 29 people in Information Technology, up 32% over the past year, as of September 2026.
Computed from 135 current and 84 former Guardio profiles, as of September 2026. Source: Crustdata.
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