Stable Horde

Stable Horde launched as a community-driven, decentralized image generation service that aggregates volunteer GPU workers to host and run Stable Diffusion-style models. Positioned as an alternative to centralized inference APIs, Stable Horde's core value proposition is access to a distributed pool of contributor GPUs via a single API and web UI. Because worker operators run their own nodes, the network can offer free queued generations funded by volunteer compute while also letting contributors and supporters buy credits or priority to reduce wait times. The project emphasizes open-source tooling, an API-first design, and a community-moderated worker economy.

Under the hood Stable Horde supports text-to-image, image-to-image, and inpainting endpoints and exposes parameters familiar to Stable Diffusion users (prompt, negative prompt, seed, steps, sampler choice). The network lists and serves many community models including Stable Diffusion 1.5 variants and SDXL-compatible workers where available; it also accepts LoRA and hypernetwork weights when workers advertise those capabilities. The API reports worker capabilities and queue status; callers can request a specific model or let the horde route to any compatible worker. Users can run their own worker node (the Horde worker client) to contribute GPU time and earn credits, and there are community-maintained integrations/extensions for AUTOMATIC1111 WebUI and ComfyUI to route jobs through Horde.

Pricing on Stable Horde is credit- and donation-oriented rather than a single fixed subscription. A Free tier exists (community queue) with lower priority and limited concurrent jobs; a small paid/supporter level (community-supported, commonly around a few dollars per month) increases queue priority and credit accrual for faster response; larger API users buy credits or arrange custom access for higher throughput and SLA-style priority. Many users buy bulk credits or sponsor workers directly; because the model is community-run, exact credit-to-generation ratios vary by worker hardware and model (and can be different for SDXL vs SD 1.5).

Stable Horde is used by indie developers, researchers, and freelance creatives. Example: a game artist uses Horde to generate 50 concept thumbnails per day to iterate faster without investing in local GPUs; a chatbot developer uses the Horde API to produce on-demand illustrations for 500 monthly chat sessions. Agencies testing many model variants use it to compare outputs without provisioning hardware. Compared to cloud-hosted rivals like Replicate or DreamStudio, Stable Horde’s key trade-off is lower direct cost and more model choice at the expense of variable latency and community-driven reliability.