ActiveFence

ActiveFence is the leading provider of UGC and AI Safety solutions, delivering the industry’s most robust safeguards, to protect the world’s leading foundation models and AI-powered applications. Trusted by safety teams of all sizes, we help protect over three billion users from threats such as child abuse, exploitation, hate speech, and more. Our comprehensive solutions integrate deep intelligence research, AI-driven harmful content detection, and a robust moderation platform, enabling global platforms to operate safely and responsibly in over 100 languages.

activefence.com

ActiveFence

activefence.com

HQUS

Team Size366

Open Jobs20

Total Funding$100M

Latest FundraiseUnknown

TL;DR

Core offering: AI-driven trust & safety platform for detecting and preventing online harm (child abuse, hate speech, disinformation, fraud, terror, etc.).

Scale: Claims to protect over 3 billion users and supports 100+ languages.

Funding (disclosed): $100M disclosed in July 2021 (covers a Series B and a previously unannounced Series A).

Founding & HQ: Founded in 2018; co-headquartered in New York and Tel Aviv.

M&A signal: Acquired Rewire (announced March 8, 2023) to expand text-based harmful-content models.

Team size (directory): Reported ~366 employees.

Company Overview

Problem Domain

Trust & Safety / online harm detection and prevention for platforms (content and behavior abuse).

Founded

2018

Industry

Software Development

Funding Track Record

Series B- 2021-07-26

Part of the $100M disclosed on July 26, 2021; the $100M covered this Series B and a previously unannounced Series A.

Series A

Previously unannounced Series A included in the $100M disclosed July 26, 2021.

Undisclosed round- Q1 2023

Reported undisclosed funding round in Q1 2023; amount and investors not publicly disclosed.

Investor Signal

“Investors reported include CRV, Highland Europe, Norwest Venture Partners, Grove Ventures, Vintage Investment Partners, Resolute Ventures and Phoenix Financial; Telefonica has also been reported as an investor.”

Founders

What we do

TL;DR

Company Overview

Funding Track Record

Founders

What we do

ActiveFence

activefence.com

ActiveFence

activefence.com

HQUS

Team Size366

Open Jobs20

Total Funding$100M

Latest FundraiseUnknown

TL;DR

Core offering: AI-driven trust & safety platform for detecting and preventing online harm (child abuse, hate speech, disinformation, fraud, terror, etc.).

Scale: Claims to protect over 3 billion users and supports 100+ languages.

Funding (disclosed): $100M disclosed in July 2021 (covers a Series B and a previously unannounced Series A).

Founding & HQ: Founded in 2018; co-headquartered in New York and Tel Aviv.

M&A signal: Acquired Rewire (announced March 8, 2023) to expand text-based harmful-content models.

Team size (directory): Reported ~366 employees.

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Dynamo AI	🇺🇸US	Data and AnalyticsDeepTechInformation TechnologySoftware	-

Company Overview

Problem Domain

Trust & Safety / online harm detection and prevention for platforms (content and behavior abuse).

Founded

2018

Industry

Software Development

Funding Track Record

Series B- 2021-07-26

Part of the $100M disclosed on July 26, 2021; the $100M covered this Series B and a previously unannounced Series A.

Series A

Previously unannounced Series A included in the $100M disclosed July 26, 2021.

Undisclosed round- Q1 2023

Reported undisclosed funding round in Q1 2023; amount and investors not publicly disclosed.

Investor Signal

Founders

What we do

Related Companies

Company	HQ	Industry	Total Funding
Distro	🇺🇸US	HR and Recruiting	-
Lakera	🇺🇸US	Data and AnalyticsDeepTechInformation TechnologySecuritySoftware	$30M
Faculty	🇬🇧GB	Software	$53M
Writer	🇺🇸US	Data and AnalyticsDeepTechInformation TechnologyMediaSoftware	$326M
Dynamo AI	🇺🇸US	Data and AnalyticsDeepTechInformation TechnologySoftware	-

Join the Team

GenAI Security Team Lead

On-SiteRamat Gan

On-Site • Ramat Gan

What We Are Looking For As a GenAI Security Team Lead, you will lead a team of GenAI researchers, combining both strategic and hands-on, big-picture planning with direct technical contributions.

Your primary responsibility will be managing a GenAI-focused team, while fostering a culture of innovation and excellence, providing comprehensive training, guidance, and leadership while ensuring high-quality deliverables.

The position balances managerial responsibilities with hands-on technical work (approximately 25%)

Key Responsibilities

Teeming tracks opportunities at over 24,000 AI startups, then works with you to find (and land) the one you'll love.

Backend Developer

Full-timeAmsterdam, NL

Full-time • Amsterdam, NL

Frontend Developer

InternshipMunich, DE

Internship • Munich, DE

Machine Learning Engineer

InternshipBerlin, DE

Internship • Berlin, DE

Frontend Developer

Part-timeBerlin, DE

Part-time • Berlin, DE

Technical Writer

ContractJerusalem

Contract • Jerusalem

AI Researcher

Full-timeTel Aviv

Full-time • Tel Aviv

Recruit, mentor, and manage a team of GenAI researchers

Regularly share knowledge with team members and collaborate across departments

Evaluate and enhance team performance and deliverables quality

Lead development of automated test harness, continuously evaluating prompts across multiple GenAI models to expose vulnerabilities and measure guardrail effectiveness.

3+ years of experience managing teams in offensive cyber security
Strong understanding of GenAI or AI-driven products. and their underlying architectures, especially generative models and agentic frameworks.
Proficiency in Python
Exceptional leadership and interpersonal skills, with excellent communication and stakeholder management abilities.
Strategic, analytical mindset with strong problem-solving skills and a proven ability to drive complex projects to completion

Bachelor’s or Master’s degree in Computer Science, Information Security, or a related field.
Experience with AWS cloud services and environments.
Experience with machine learning development frameworks and environments.
Advanced Certifications in offensive cybersecurity (e.g. OSWE, OSCE3, SEC542, SEC522) are highly desirable.

ActiveFence is the leading provider of security and safety solutions for online experiences, safeguarding more than 3 billion users, top foundation models, and the world’s largest enterprises and tech platforms every day.

As a trusted ally to major technology firms and Fortune 500 brands that build user-generated and GenAI products, ActiveFence empowers security, AI, and policy teams with low-latency Real-Time Guardrails and a continuous Red Teaming program that pressure-tests systems with adversarial prompts and emerging threat techniques. Powered by deep threat intelligence, unmatched harmful-content detection, and coverage of 117+ languages, ActiveFence enables organizations to deliver engaging and trustworthy experiences at global scale while operating safely and responsibly across all threat landscapes.