Synthesia partners with Cinder to automate pre-generation AI video moderation
Synthesia, an AI video platform, announced a partnership with Cinder to enhance its trust and safety stack for AI video content moderation. This collaboration aims to increase product velocity and improve the handling of new types of harm, which is critical for enterprise customers in regulated industries. The partnership will integrate Cinder's infrastructure to act as a second pass on model decisions and help Synthesia's team build faster against new harm types.
Key Takeaways
- Cinder acts as an AI agent providing a second pass on moderation decisions before any video is rendered.
- Automated moderation volume increased from 6.56 million items in 2024 to 11.58 million in 2025.
- Manual reviews decreased from 792,586 to 441,086 year-over-year as automation accuracy improved.
- The 2025 Futuresafe report indicates 787 accounts were terminated for repeated policy violations.
- Independent testing by broadcaster RTBF confirmed the platform successfully blocked political propaganda and crypto scams.
Why It Matters
The partnership signals a shift from reactive moderation to preventive, infrastructure-level safety within the generative video stack. For enterprise customers in regulated sectors like finance and defense, this proactive filtering reduces the legal risk of generating non-compliant content. As AI video becomes a primary surface for corporate communication, moving moderation to the pre-rendering stage sets a technical standard for the ecosystem. This approach reduces the operational burden on human review teams while increasing the velocity of product updates and language support. Watch for how this infrastructure handles multi-agent systems and real-time interactive avatars as Synthesia expands its "Video Agents" roadmap.
Additional Context
The partnership arrives as Synthesia experiences a period of rapid financial and enterprise expansion. Per Sacra and industry reports from early 2026, Synthesia crossed the $150 million Annual Recurring Revenue (ARR) milestone at the end of 2025 and is projected to exceed $200 million in 2026. The company’s January 2026 Series E round, led by GV (Google Ventures), valued the startup at $4 billion, doubling its valuation from the previous year. This growth is driven by heavy enterprise adoption, with 90% of the Fortune 100 now utilizing the platform for internal training and sales enablement, up from 70% just months prior. From a regulatory perspective, Synthesia and Cinder are aligning with looming deadlines for the EU AI Act. Per European Commission updates in June 2026, Article 50 transparency obligations—which require clear labeling and detection of AI-generated content and deepfakes—will become legally enforceable on August 2, 2026. The partnership facilitates compliance with these rules by embedding detection and watermarking during the generation process rather than post-production. This move mirrors broader industry activity; for example, Cinder raised $41 million in Series B funding in May 2026 to scale its safety tools for clients like OpenAI and Spotify, as noted by TechCrunch and SVPost. Synthesia also continues to invest in high-performance infrastructure to support its scaling moderation and rendering needs. In June 2025, the company became the first to train its video models using NVIDIA’s Blackwell GPUs on Google Cloud. This technical foundation supports its 2026 pivot toward "Video Agents," which move beyond static clips to real-time conversational experiences. As recorded in its 2025 Futuresafe report, the company maintained 65,000 customers globally, with a network of over 620 employees, as it aims to sustain its 140% net revenue retention through 2026.
Read full article at cinder.ai