Deploy and Host Kokoro on Railway

Kokoro is a compact, open-weight text-to-speech model served here through Kokoro-FastAPI. It turns text into natural, expressive audio through an OpenAI-compatible API and a browser-based interface. With only 82 million parameters and multilingual voices, it gives developers a practical way to add efficient speech synthesis to applications.

About Hosting Kokoro

Hosting Kokoro runs a stateless, CPU-only FastAPI service that exposes both the speech API and web interface on port 8880. The container already includes the application and model assets, so it needs neither a database nor persistent storage. CPU inference keeps the deployment simple, but Railway compute usage determines operating cost: more memory and faster CPUs can improve throughput while increasing spend. Expect model initialization to make early requests slower, and expect long passages or concurrent synthesis jobs to increase latency. For production workloads, monitor request duration and resource consumption, then scale service resources or replicas to match expected traffic and response-time requirements.

Common Use Cases

Add natural speech output to assistants, agents, and conversational applications.
Generate narration, accessibility audio, podcasts, or learning materials from text.
Integrate an OpenAI-compatible text-to-speech API into development and automation workflows.

Dependencies for Kokoro Hosting

Kokoro hosting uses the Kokoro-FastAPI server, the Kokoro-82M model and voice assets, and the prebuilt CPU container image. Railway supplies the managed container runtime, networking, and public HTTPS endpoint.

Deployment Dependencies

Implementation Details

This template deploys the Umbrel package's pinned Kokoro-FastAPI CPU image as a single web service. Railway routes its generated domain directly to container port 8880. No custom environment variables or persistent volumes are required.

Why Deploy Kokoro on Railway?

Railway is a singular platform to deploy your infrastructure stack. Railway will host your infrastructure so you don't have to deal with configuration, while allowing you to vertically and horizontally scale it.

By deploying Kokoro on Railway, you are one step closer to supporting a complete full-stack application with minimal burden. Host your servers, databases, AI agents, and more on Railway.