Civitai

Civitai's core asset is its catalog of community-uploaded models: checkpoints, LoRAs, textual inversions, ControlNets, and VAEs. Each listing includes the base model it was trained on, user ratings, and a gallery of sample generations. That last part matters more than ratings, since a sample image tells you exactly what the model does with a real prompt. The breadth is the pitch here, with hundreds of thousands of resources across Stable Diffusion, Flux, and other architectures.

The generator runs Stable Diffusion and Flux on Civitai's servers, so a laptop or phone works fine. You get text-to-image and image-to-image, plus video generation through models like Hunyuan and Wan. Every model page has a Create button that pre-loads that model into the generator, and the Remix option on any image restores its full settings. Generation is priced on a sliding Buzz scale based on step count and model architecture. Not free for everything, but close for small jobs.

Buzz is Civitai's on-site currency and it splits into three types. Blue Buzz is earned free by reacting to images, following creators, and posting your own work; Yellow Buzz comes from crypto purchases; Green Buzz is tied to card purchases on the .com site. You spend Buzz on generation, tipping creators, posting bounties, and training LoRAs. A new account starts with 100 Blue Buzz. Daily engagement tops that up. No money required.

The LoRA Trainer lets you fine-tune a model on your own images through a guided wizard. The appeal is straightforward: LoRA training normally wants a capable GPU and a working knowledge of training scripts, and this removes both requirements by running the job on Civitai's infrastructure. You pay in Buzz, and for a modest dataset the cost stays within what active free users earn. It's the shortest path from "I have 20 reference images" to "I have a custom model." Worth trying before you buy a GPU.

Model creators can earn in two ways. Creator Compensation pays a share of Buzz whenever someone generates with your uploaded resource, and the Creator Program lets you set paid access or a licensing fee on model versions for real income. The tiers scale with membership level, from 10 monetized versions a month on Bronze up to unlimited on Gold. There's a genuine incentive loop here: the more your model gets used, the more you earn, which is why the popular checkpoints get steady maintenance.

Beyond models, Civitai runs galleries for images, videos, and 3D models, plus forums, contests, and a Bounty Board. Bounties work like a job board: you post a request with a Buzz reward and community members deliver. The Education hub publishes official guides on prompting, SDXL, and Flux, and the article system lets creators write long-form walkthroughs of their workflows. It's a full community layer rather than a download site with a comment box. That distinction is why people stay.

Civitai publishes a developer platform with a Site API for browsing models, images, and creators, plus an Orchestration API that submits image, video, audio, and text jobs through a single interface and routes them across providers. There's also an MCP endpoint for connecting AI agents. For developers building on top of Civitai's catalog, the docs and recipes cover the common cases without reverse-engineering the site. Worth a look if you build tools.