Companies

Cinder

cinder.ai

Cinder provides AI-native trust-and-safety infrastructure that helps digital platforms automate responses to online abuse.

HQNew York City, New York, United States
Employees11-50
Funding$55M
Revenue$5M-10M
8 active roles
Profile 2mo agoJobs checked 17h ago
AI / MLAI ApplicationB2B SaaSSeries B$50M-$200M

About

Cinder builds mission-critical trust-and-safety infrastructure for major online platforms and AI companies. Its platform converts customer policies into agentic workflows for content moderation, fraud detection, investigations, and real-time abuse response, differentiated by customizable AI agents, operational tooling, and integrated expert services.

Market

Cinder competes in enterprise trust-and-safety operations and AI-abuse prevention software for online platforms and AI companies, positioning itself as the unified operating system or system of record for safety decisions rather than merely a content classifier. Its differentiation is the combination of policy-aware AI agents, configurable workflows, human-in-the-loop review, auditability, compliance reporting, quality assurance, and integrations with customers’ existing models and third-party tools; this broader operational layer overlaps with content-moderation platforms such as Spectrum Labs, Alice/ActiveFence, Tremau, Checkstep, and Hive.

Target Customers

High-growth companies ranging from startups to enterprises, especially frontier AI labs, e-commerce companies, social platforms, and large online platforms facing abuse, fraud, manipulation, or AI-safety risks. Primary buyers and users are trust-and-safety, engineering, security, operations, policy, and legal teams managing high-volume, high-stakes decisions.

At a Glance

Problem

Cinder addresses the operational challenge of protecting digital platforms from abuse, fraud, manipulation, and AI-powered harms at internet scale. Trust and safety teams must make millions of high-stakes decisions across content, users, accounts, and networks, while threats evolve faster than conventional rules and classifiers. The economic pain is the cost of human review, slow investigations, inconsistent enforcement, and regulatory or reputational exposure; Cinder cites more than 100,000 hours saved through automation and 94% of human review automated for one customer.

The clearest use case is real-time content moderation: detecting and removing adult content, extremism, CSAM, non-consensual intimate imagery, and other policy violations. The same infrastructure extends to coordinated-abuse investigations, intellectual-property enforcement, account takeover and user-fraud detection, and other workflows where a platform must act quickly without sacrificing context or oversight.

Product / Service

Cinder is a trust and safety operations platform built around configurable AI agents and agentic workflows. Organizations connect their policies, data, review teams, enforcement paths, vendors, and AI systems in one operational surface. Agents monitor for anomalies, analyze content and user or entity history, apply policy-specific decisions, route edge cases to human reviewers, and record decisions and reasoning for audit. Teams can challenge or override actions, continuously improve the agents through review feedback, and benchmark both human reviewers and automated systems.

The delivery model combines software with expert services, including AI red teaming and evaluation, data labeling, managed operations, policy and AI support, and applicant-fraud detection. Customers can deploy Cinder standalone or integrate existing models and tools, with role-based access, SSO, encrypted data, explainability, audit trails, and compliance support. The intended benefit is a single command center that increases moderation accuracy and throughput while preserving human control and producing a durable system of record for safety decisions.

Market

Cinder competes in trust and safety operations software, spanning content moderation, digital-platform abuse prevention, fraud and account-takeover detection, copyright enforcement, and AI safety. The supplied research does not identify named direct competitors; instead, it contrasts Cinder with off-the-shelf classifiers and positions the company as infrastructure for organizations managing abuse and safety at scale. Its customer references and case studies include Synthesia, OpenAI, Stability AI, Character.AI, Midjourney, ElevenLabs, BeReal, Depop, Black Forest Labs, Zello, and Patreon.

Cinder is not presented as pre-revenue: it reports a $41 million Series B and multiple enterprise deployments, although the research does not provide revenue figures. Reported operating scale includes more than 3 billion end-users protected, more than 400 million events processed daily, more than 5 million pieces of content reviewed, greater than 97% AI moderation accuracy in a cited result, and reductions in moderation queues and repeat-offender abuse. These figures are company-reported case-study and marketing metrics, so they demonstrate traction and enterprise adoption rather than independently verified financial performance.

Founders & Leadership

Glen WiseFounder
Chief Executive Officer
Phil BrennanFounder
Chief Operating Officer
Brian FishmanFounder
Chief Strategy Officer

Funding History

2022-05
Seed$4M

Accel

2022-12
Series A$10M

Accel

2026-05
Series B$41M

Radical Ventures

Recent News

2026-06-29
AI Safety: what are the top startups now?

An independent startup roundup identifies Cinder as a notable AI-safety breakout, citing its recent funding, large protected-user claims, and AI-generated-abuse use cases.

2026-06-26
Meet Cinder at TrustCon 2026

Cinder announced its participation in TrustCon 2026, including sessions and meetings focused on trust, safety, and AI enforcement. The event was scheduled for July 20–22 in San Francisco.

2026-06-04partnership
Synthesia partners with Cinder to power the world's safest AI video platform

Synthesia expanded its trust-and-safety stack with Cinder so enforcement can keep pace with its AI video platform.

2026-06-03funding
Cinder Raises $41M Series B

The SaaS News reported that Cinder raised a $41 million Series B led by Radical Ventures to expand its AI-native trust-and-safety platform for technology companies.

2026-05-19
How the Take It Down Act Will Impact Platforms Handling NCII Compliance

Cinder published analysis of the Take It Down Act and its implications for platforms handling non-consensual intimate imagery, highlighting the work of organizations including StopNCII.org.

2026-05-12funding
Cinder raises $41 million in Series B funding to defend companies from AI abuse

Cinder announced a $41 million Series B to defend companies against AI abuse, including fraud, prompt abuse, and non-consensual intimate imagery. The company said it planned to double headcount over the following 12 months.

2026-05-11partnership
Character.AI · Cinder case study

Character.AI partnered with Cinder to improve automated decision-making as part of its moderation strategy; Cinder’s agentic review was used to improve moderation operations.

2026-05-11product
Generative AI - Cinder

Cinder’s generative-AI offering uses AI agents to enforce policies at the prompt layer, red-team models before launch, and keep guardrails calibrated as products grow.

2026-04-30partnership
Wizz App, Trusted by 16 Million Users, Partners with Cinder to Power AI-Driven Content Moderation At Scale

Wizz App partnered with Cinder to integrate AI agents trained specifically on Wizz’s content policies for large-scale content moderation.

2025-08-05partnership
StopNCII and Cinder Partner to Prevent Non-Consensual Intimate Imagery

Cinder partnered with StopNCII.org, adding access to StopNCII’s global hash-sharing database so Cinder can check, match, and remove non-consensual intimate imagery.

Active Roles

8
New York/Engineering/8d ago
New York/Design/12d ago
General ApplicationRemote$100k – $250k
Remote: SF/NYC/London/Other/31d ago
New York/Product/43d ago
New York/Engineering/60d ago
New York/Forward-Deployed Engineer/60d ago
New York/Sales/60d ago
New York/Engineering/60d ago

Business Model

Cinder sells enterprise trust-and-safety software and customized platform deployments to online platforms and AI companies. It also offers related expert services, including AI red-teaming, data labeling, managed operations, and applicant-fraud detection; public standardized pricing was not found, while its materials indicate complex enterprise sales and high-value deals.

Products

Cinder Trust & Safety Operations Platform: a unified system of record and command center for policies, workflows, cases, human review, audits, compliance, reporting, and analyticsCinder AI Agents for content moderation, case investigation, IP and copyright protection, user fraud and account-takeover detection, and custom safety workflowsGenerative-AI safety tooling for prompt-layer policy enforcement, model red teaming, guardrail calibration, and custom vertical agentsExpert services including AI red teaming and evaluation, data labeling, managed trust-and-safety operations, and applicant-fraud detection

Customers

OpenAISpotifydepopBlack Forest Labs

Tech Stack

LLMs and agentic AIPythonTensorFlowPyTorchKerasAWS cloud architectureTerraformLangChainCloud-based, low-latency AI/ML systems

Competitors

Intrinsic
Spectrum Labs
Alice (formerly ActiveFence)
Tremau (Nima)
Checkstep
Hive Moderation

Key Investors

Accel, Y Combinator, Radical Ventures