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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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	—	-
Lakera	🇺🇸US	Data and AnalyticsDeepTechInformation TechnologySecuritySoftware	$30M
Faculty	🇬🇧GB	Software	$53M
Writer	🇺🇸US	Data and AnalyticsDeepTechInformation TechnologyMediaSoftware	$326M
Applied Computing	🇬🇧London, GB	Data and AnalyticsDeepTechSoftwareSustainability	$12M

Join the Team

Python Developer

On-SiteHanoi, VN

On-Site • Hanoi, VN

We’re building a platform of autonomous AI agents for data collection, labeling, and intelligent analysis — and we’re looking for a Senior Backend Engineer to power this system. You will architect and implement core services that interface with LangGraph-based workflows, manage data access from structured and unstructured sources, and support seamless orchestration between our AI layers and data infrastructure. The ideal candidate is comfortable working with AWS Bedrock, vector databases, and building APIs optimized for AI-scale interaction.

Responsibilities

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

Product Designer

Part-timeNew York, US

Part-time • New York, US

Machine Learning Engineer

ContractHaifa

Contract • Haifa

DevOps Engineer

InternshipAmsterdam, NL

Internship • Amsterdam, NL

Software Engineer

Part-timeNovi Sad, RS

Part-time • Novi Sad, RS

Machine Learning Engineer

ContractNew York, US

Contract • New York, US

Technical Writer

Full-timeCambridge, GB

Full-time • Cambridge, GB

Build performant, production-grade backend APIs and services using AWS Lambda, EC2, and RDS.

Integrate structured and unstructured data access layers with LangGraph and LangSmith agents.

Architect retrieval pipelines using vector databases to enable semantic search for AI agents.

Coordinate with data engineers to support RAG workflows across a shared data lake.

Develop and maintain task routing, memory management, and agent orchestration logic.

Contribute to platform-level observability, metrics, logging, and diagnostics for agentic tasks.

Deploy and manage MCP servers to wrap scraping, proxy, and JS-rendering tooling as standardized Model Context Protocol (MCP) services.

4+ years of backend development experience, with strong programming skills (Python, Node.js).
Deep experience with serverless architectures, microservices, and AWS (Lambda, EC2, RDS).
Familiarity with LangGraph, LangChain, or equivalent AI orchestration frameworks.
Working knowledge of vector databases (Chroma, Pinecone) and semantic search.
Solid database and API design expertise, particularly with PostgreSQL.
Experience building scalable, low-latency backend systems for AI or data platforms.

Preferred Qualifications

Experience with agentic AI systems or orchestration of multi-agent workflows.
Understanding of RAG patterns in production.
Comfortable with Databricks and Unity Catalog data integration strategies.
Exposure to AWS Bedrock and large model orchestration in cloud-native environments.

About ActiveFence

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.