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Synthesia
Synthesia was founded in London in 2017, and rather than generating fully imagined video scenes from text prompts, it took a distinctly different approach focused on AI-generated human presenters — realistic digital avatars that can deliver a script in dozens of languages using synthetic voice and lip-synced video. The platform has built its primary customer base around corporate training and internal communications video, letting companies produce professional-looking presenter-led videos without hiring an actor, renting a studio, or filming anything at all — a genuinely different value proposition from the creative and entertainment focus most competing video generators emphasize. Synthesia's avatars are built partly from consenting human actors who license their likeness to appear as digital presenters, a business model that's let the company sidestep some of the likeness and consent controversies that have surrounded other AI-generated human video, since every avatar used has agreed to the arrangement directly. Synthesia's combination of a corporate-training focus and its consent-based avatar licensing model has made it one of the most commercially established AI video companies, built around a genuinely different use case than the visual-effects and creative-content focus most competing video generators pursue.
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Runway
Runway was founded in 2018 in New York City, well before generative AI video became a mainstream category, and the company spent its early years building a broader suite of AI-assisted video editing tools — background removal, motion tracking, and object segmentation — used by professional film and video editors before it pivoted toward full text-to-video generation. Runway's Gen-2 and Gen-3 models, released in 2023 and 2024, were among the first AI video generators capable of producing genuinely usable short video clips directly from text prompts or a single reference image, putting the company ahead of much larger competitors in the earliest phase of the generative-video category. The company's tools were used in the production of the 2023 film "Everything Everywhere All at Once," specifically for certain visual effects sequences, giving Runway a notable and unusually early credential within the traditional film industry rather than purely the AI research community. Runway's combination of years of professional video-editing tool development before pivoting to generative video and its genuine adoption within traditional film production has made it one of the most professionally credible AI video generators, distinct from more purely consumer-facing rivals.
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