In Concept art & 2D assets, Leonardo.Ai ranks #5 and Runway ranks #8. No independent quality tests found. Ranked on game-dev fit: commercial use allowed; no engine integration stated; API and official MCP server. Leonardo's own models are on Artificial Analysis's text-to-image leaderboard, but near the bottom (best: Lucid Origin Ultra, #86 of 102), so it doesn't move it up.
Commercial use: both commercial use allowed (Leonardo.Ai terms; Runway terms).
Free plan: Leonardo.Ai: free plan (150 fast tokens/day; creations are public) pricing. Runway: free trial or credits only (125 one-time credits) pricing.
Shipping free-plan output in a paid game: both allow it, per their published terms.
API and MCP: both: public API, official MCP server.
Engine integrations stated by the vendor: both: none stated (standard file export).
General image and video generation platform with trainable custom models; usable for concept art, item icons and texture ideas.
AI video, image and audio generation (Runway Gen-4.5 plus third-party models), usable for trailer shots, teasers and marketing material.
Verdict
For general concept art and icon ideas; free-tier output can be used commercially but is public and Leonardo holds rights to it, while paid plans give you ownership.
For generating trailer and teaser shots; the terms don't restrict commercial use of outputs, but Runway may train on your inputs and outputs.
Tasks●
Concept art & 2D assets, Textures & materials
Trailers & marketing, Concept art & 2D assets
Engines
Any (standard file export / engine-agnostic)
Any (standard file export / engine-agnostic)
Free plan●
Free plan 150 fast tokens/day; creations are public
Free trial or credits only 125 one-time credits
Pricing
Free: 150 fast tokens/day (public creations). Essential US$12/month, Premium US$30/month, Ultimate US$60/month (ex. tax). Team and API plans available. source
Free $0 (125 one-time credits). Standard US$12/month, Pro US$28/month and Max US$76/month, billed annually (US$15, US$35 and US$95 billed monthly). Gen-4.5 uses 12 credits per second of video. source
Export formats
Not stated by vendor
Not stated by vendor
Commercial use
Commercial use allowed Paid subscribers retain full ownership and IP rights. Free tier: Leonardo holds rights to the images but grants you a non-exclusive, royalty-free licence for commercial use; free creations are public. source
Commercial use allowed Terms of Use 4.4: Runway does not claim ownership of Inputs or Outputs and does not restrict your commercial use of Outputs. Inputs and Outputs may be used to train its models. source
Revenue share / caps
Not stated by vendor
Not stated by vendor
API
Available. API plans are separate from web subscriptions source
Rows marked ● differ between the two tools. Licence badges: green = commercial use allowed (including any free plan or trial), amber = paid plans only, restricted, or allowed but with no free plan, red = not allowed, grey = not stated by vendor or not applicable. Read the vendor's current terms before you ship.