About
Cinder builds trust-and-safety infrastructure for high-growth companies and major internet platforms, covering content moderation, abuse detection, investigations, and policy enforcement. Its differentiation is real-time threat detection combined with AI agents that automate review and enforcement across large volumes of platform activity.
Market
Cinder competes in the enterprise trust-and-safety, content moderation, platform-integrity, and online-risk software market. It positions itself as an AI-native operational command center rather than only a point moderation classifier, combining customer-specific policy enforcement, custom agents, investigations, human review, and system-of-record capabilities. Its differentiation is that agents learn from each customer's policies and validated decisions while providing real-time enforcement, auditability, and closed-loop quality improvement.
Cinder targets high-growth AI companies and large online platforms that face substantial abuse, fraud, manipulation, or content-safety risk. Its primary buyers and users are trust-and-safety, policy, operations, engineering, security, and legal teams responsible for enforcing platform standards at scale.
At a Glance
Problem
Cinder addresses the operational problem of keeping fast-growing digital platforms safe as abuse becomes higher-volume, more sophisticated, and increasingly AI-powered. Trust and Safety teams must detect and investigate harmful content, fraud, coordinated abuse, copyright violations, and account takeovers while translating company-specific policies into consistent decisions. The stakes are particularly high for deepfake imagery, child sexual abuse material, non-consensual intimate imagery, and AI-enabled attacks, where failures can create immediate user, regulatory, reputational, and legal exposure.
The economics are substantial. Inefficient moderation systems can cost companies many millions of dollars annually through reviewer and BPO fees, engineering work to connect fragmented tools, and the operational cost of maintaining humans in the loop. The core use case is therefore real-time, policy-specific moderation and investigation at internet scale: automatically identifying and taking down severe abuse while reserving ambiguous, high-risk cases for human experts.
Product / Service
Cinder provides an AI-native Trust and Safety operations platform. Its AI agents are trained on a company’s values, policies, and data structures, then detect threats, investigate cases, and enforce policies in real time across content moderation, copyright and IP, user fraud, account takeover, and custom workflows. The platform can operate standalone or connect existing models and tools, including IWF, Salesforce, and StopNCII, while centralizing policies, data, review teams, enforcement paths, and AI systems in one operational surface.
The model is human-in-the-loop rather than fully autonomous: agents escalate edge cases with context and recommended actions, while reviewers can audit, challenge, or override decisions. Cinder also offers AI red teaming, data labeling, managed operations, and applicant-fraud detection. The intended benefit is lower review volume and BPO spend without sacrificing control; Cinder reports that its customers have automated 94% of human review, saved more than 100,000 hours, and processed more than 400 million events daily.
Market
Cinder competes in the Trust and Safety operations, AI content moderation, digital safety, and abuse-prevention software market. It sits in a growing vendor ecosystem that includes end-to-end moderation and policy-enforcement platforms such as ActiveFence and Checkstep, while third-party market research also names Moonbounce, Chatterbox Labs, Intrinsic, and VerifyMy among Cinder’s competitors. Cinder’s differentiation is its broader operating-system approach: policy-aligned agents, investigation workflows, integrations, human oversight, and managed services rather than only an off-the-shelf content classifier.
The company has clear commercial traction rather than appearing pre-revenue. Its cited customers include OpenAI, Spotify, Depop, Black Forest Labs, Synthesia, Character.AI, and Zello, and its case studies report outcomes such as more than 50% queue reduction, more than 90% reduction in CSAM and NCII vulnerability, and three times more repeat-offender accounts taken down. Cinder announced a $41 million Series B on May 12, 2026; the available materials do not provide a revenue figure, but the customer deployments, operating volumes, reported outcomes, and financing indicate an actively commercializing company.
Founders & Leadership
Funding History
Accel
Accel
Radical Ventures
Recent News
Cinder announced its participation in TrustCon 2026, including sessions, activities, and meetings focused on trust, safety, and AI enforcement.
Synthesia announced a partnership with Cinder to extend its trust-and-safety stack. Cinder provides additional model evaluation, classification, context gathering, and escalation capabilities for Synthesia's AI video platform.
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 major technology companies.
Cinder announced a $41 million Series B led by Radical Ventures, with participation from Accel, Y Combinator, M12, PSP Growth, Neuberger's Outpost Ventures, and others. The company also announced a New York City headquarters and plans to double headcount over the following year.
Cinder announced support for StopNCII.org's global hash-sharing database. Customers can check, match, and remove non-consensual intimate imagery through Cinder without building an additional integration.
Wizz App selected Cinder to consolidate human review, AI moderation workflows, reporting, and appeals into one trust-and-safety operating platform. The partnership covers 11 policy areas, including age verification, CSAM, harassment, hate speech, and privacy.
Active Roles
8Business Model
Cinder monetizes enterprise contracts for its trust-and-safety software and related managed/BPO operations. Its materials describe outcome-based BPO pricing, while its enterprise sales motion includes high-value deals, customer expansion, renewals, and upsells.
Products
Customers
Tech Stack
Similar Companies
Competitors
Key Investors
Accel, AWS Startups, J2 Ventures, Mozilla Ventures, Outpost Ventures