Runway vs Synthesia

When to pick Runway

• You need generative, cinematic footage — b-roll, concept clips, or stylized scenes from a text or image prompt using the Gen-4.5 model.
• You’re a developer building video into a product: the REST API is available on every paid plan, starting at $12/user/month.
• You want frontier capability beyond clips — the General World Model line adds interactive environments and real-time video agents.

When to pick Synthesia

• You need talking-head videos without a camera or crew — Synthesia turns a script into a presenter-led video using 240+ avatars.
• You produce training, onboarding, or compliance content at scale — SCORM export and LMS integrations make it a direct fit for L&D teams.
• You localize heavily: 160+ languages for new videos and AI dubbing in 140+ let you ship the same content across regions with synced lip movement.

Bottom line

Runway and Synthesia both make “AI video,” but they solve opposite problems. Runway is generative — it creates cinematic clips and b-roll from prompts, has an API on every paid plan from $12/user/month, and extends into world simulation; it fits filmmakers, creative studios, and developers. Synthesia is avatar-based — it turns scripts into presenter-led videos in 160+ languages with SCORM/LMS export, fitting L&D, HR, and marketing teams from $18/month. Pick Runway when you need footage; pick Synthesia when you need a presenter.