C

Cinder

SaaS platform enabling real-time moderation

Overview

Cinder provides a SaaS platform that helps Trust and Safety teams automate and scale content moderation and improve AI training with real-time moderation decisions that come as accurately annotated data. The platform runs in the cloud, stores labeled moderation data, supports case management, and includes audit logs and usage analytics to track how teams work and their efficiency. It differentiates itself by focusing on end-to-end safety workflows with built-in governance, security, scalability, and analytics tailored to sensitive online environments. Its goal is to help online platforms counter harmful content around the clock by automating moderation and strengthening AI with high-quality labeled data.

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About Cinder

Simplify's Rating
Why Cinder is rated
B-
Rated B on Competitive Edge
Rated B on Growth Potential
Rated C on Differentiation

Industries

Data & AnalyticsEnterprise SoftwareCybersecurityAI & Machine Learning

Company Size

51-200

Company Stage

Series B

Total Funding

$55.1M

Headquarters

New York City, New York

Founded

2021

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Simplify's Take

What believers are saying

  • Cinder raised $41 million on May 12, 2026, led by Radical Ventures.
  • Synthesia adopted Cinder in June 2026; 11.5 million items were reviewed in 2025.
  • Krea used Cinder red teaming in eight days, proving speed for AI launches.

What critics are saying

  • ActiveFence, Hive Moderation, and Azure AI Content Safety compress pricing and margins.
  • Cinder depends on Meta-origin trust expertise; policy shifts can obsolete workflows fast.
  • OpenAI, Spotify, and Synthesia concentration makes one lost logo visibly damage revenue.

What makes Cinder unique

  • Cinder is the system of record for trust operations, not just a classifier.
  • Its agentic workflows unify policy, review, audits, and analytics across teams.
  • Customers plug in Cinder with NCMEC, Salesforce, StopNCII, and existing models.

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Funding

Total Funding

$55.1M

Meets

Industry Average

Funded Over

4 Rounds

Notable Investors:
Series B funding is typically for startups that have proven their business model and need more funding to expand rapidly—often by entering new markets or adding more products. Investors are usually venture capital firms that specialize in later-stage investments.
Series B Funding Comparison
Above Average

Industry standards

$35M
$41M
$45M
$65M
$100M

Benefits

  • Health Insurance
  • Dental Insurance
  • Vision Insurance
  • 401(k) Retirement Plan
  • 401(k) Company Match
  • Remote Work Options
  • Flexible Work Hours

Growth & Insights and Company News

Headcount

6 month growth

-1%

1 year growth

-5%

2 year growth

-1%
Wow Partners, Inc.
May 13th, 2026
Cinder raises $41M Series B to help platforms combat AI-powered threats with automated safety tools

Cinder, a trust and safety platform startup, has raised $41 million in Series B funding led by Radical Ventures, with participation from existing investors Accel and Y Combinator. The round brings total funding to over $60 million. Founded by former Meta employees Glen Wise and Phil Brennan, who previously built community threat intelligence platforms, Cinder provides tools for content moderation, case investigation and risk monitoring. The platform serves social media, AI labs, e-commerce and financial companies facing online safety challenges. The company is developing "agentic safety" capabilities, using AI agents to automate repetitive investigation and classification tasks. The funding will support AI agent development, customer support expansion and hiring. Competitors include Intrinsic and Spectrum Labs.

TechCrunch
Dec 8th, 2022
Cinder's content moderation software is custom-built for trust and safety teams

Cinder launches software for companies grappling with some of the internet’s most complex, dangerous challenges.

PR Newswire
Dec 8th, 2022
Cinder Emerges From Stealth With First Platform For Trust And Safety Operations

/PRNewswire/ -- Today Cinder officially launched the industry's first Trust and Safety operations platform to help organizations combat Internet abuse at scale....

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