In Concept art & 2D assets, Leonardo.Ai ranks #5 and Sloyd 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: Leonardo.Ai: commercial use allowed terms. Sloyd: commercial on paid plans only terms.
Free plan: Leonardo.Ai: free plan (150 fast tokens/day; creations are public) pricing. Sloyd: free plan (Free Guest plan: 1 text-to-3D and 1 image-to-3D generation a day, exports of community models only, personal use only) pricing.
Shipping free-plan output in a paid game: only Leonardo.Ai allows it, per their published terms.
API and MCP: Leonardo.Ai: public API, official MCP server. Sloyd: public API, no MCP server found.
Engine integrations stated by the vendor: Leonardo.Ai: none stated (standard file export). Sloyd: Godot, Unity, Unreal, Blender, Roblox.
General image and video generation platform with trainable custom models; usable for concept art, item icons and texture ideas.
AI 3D generator (text, image or editable templates) for game-ready props, with AI rigging and animation, retexturing, skyboxes, image generation and pixel-art sprite sheets in the same web app; plugins for Unity, Unreal and Blender on paid plans.
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 game-ready props from editable templates with Unity/Unreal plugins, plus rigging, retexturing and image tools on the same plan; the free plan is personal-use only.
Tasks●
Concept art & 2D assets, Textures & materials
3D model generation, Rigging, animation & mocap, Textures & materials, Concept art & 2D assets
Engines●
Any (standard file export / engine-agnostic)
Godot, Unity, Unreal, Blender, Roblox
Free plan
Free plan 150 fast tokens/day; creations are public
Free plan Free Guest plan: 1 text-to-3D and 1 image-to-3D generation a day, exports of community models only, personal use only
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 Guest plan. Plus US$15/month (US$12.50/month billed yearly). Pro US$50/month (US$41.67/month billed yearly). source
Export formats●
Not stated by vendor
GLB, OBJ and FBX (pricing FAQ); free Guest plan exports community models only source
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 on paid plans only Free plan: personal-use license. Plus and Pro include a commercial license (you own what you generate; Pro adds reselling). 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.