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ArtBot vs Leonardo.Ai

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors. Leonardo.Ai publishes a starting price ($8.33); ArtBot does not. Both have a free tier. Only Leonardo.Ai ships a public API.

ArtBotFree browser front-end for Stable Diffusion that runs jobs on the volunteer AI Horde GPU network, no account needed.Leonardo.AiToken-metered image workspace with fine-tuned model presets

Side by side

FactArtBotLeonardo.Ai
CategoryText-to-Image GeneratorsText-to-Image Generators
Pricing modelFreeFreemium
Starts at—$8.33 month
Public APINoYes
PlatformsWebWeb, API, iOS, Android
Company—Canva
Launched—2022
Last verifiedSep 6, 2026Sep 6, 2026

What our research says

ArtBot

The most complete free Stable Diffusion front-end that asks nothing of you - no signup, no card, no credits. What you trade is predictability: jobs queue against volunteer GPUs, so speed varies with who happens to be sharing hardware. Fine for experimenting, wrong for a deadline.

Pros

  • Genuinely free with no registration step
  • Covers ControlNet, image-to-image, inpainting and live painting, not just prompt-to-image
  • Image interrogation for reverse-engineering prompts from an existing picture
  • Source is open on GitHub, so behaviour is auditable

Cons

  • Generation speed depends on volunteer GPU availability, which fluctuates
  • No commercial support - it is one developer's project
  • No API of its own; automation means talking to AI Horde directly
  • Model selection is bounded by what Horde workers have loaded

Leonardo.Ai

Leonardo is the generator to pick when you need control over the model rather than one house style, and it is the only major one with a real API and custom training. Token accounting is the tax you pay for that flexibility.

Pros

  • Large library of fine-tuned model presets instead of a single opinionated model
  • Custom model training on your own images is available without an enterprise contract
  • A genuine documented API, which the obvious competitor still does not have
  • Free tier of 150 daily tokens is enough to evaluate properly

Cons

  • Token costs differ by model, resolution and feature, so per-image cost is hard to predict
  • 150 free tokens go in roughly ten generations
  • Concurrency and queue position are tier-gated, so cheap plans wait
  • Roadmap now serves Canva's product priorities, not standalone power users

Which one fits

Choose ArtBot if you need

  • Trying Stable Diffusion without creating an account
  • Experimenting with ControlNet and inpainting for free
  • People who want an open-source client they can inspect or self-host

Choose Leonardo.Ai if you need

  • Game and product teams that need consistent assets from a fine-tune they control
  • Anyone who wants generation, canvas editing and upscaling in one place
  • Developers who need image generation behind an API rather than a chat window
  • Users who want to train a model on their own reference set

More comparisons

All Leonardo.Ai alternatives →Browse all Text-to-Image Generators →