BYOAIK — Bring Your Own AI Key: a directory of AI tools that run on your own API key.

Koharu

Rust-built ML manga translator with optional bring-your-own-key hosted LLM backends.

Website Source code

Category:

Productivity Tools

Pricing:

Open Source

Open source:

Yes (GPL-3.0)

Self-hostable:

Yes

Local-first:

Yes

Platforms:

Desktop, Self-hosted, CLI, Docker

AI providers (bring your own key):

OpenAI, Anthropic, Google Gemini, DeepSeek, OpenRouter, Ollama, Custom / OpenAI-compatible

API key storage:

Stored locally on device

Key risk level:

LOW

Trust score:

86/100

Koharu is a local-first, Rust + Tauri desktop application that automates manga translation by chaining object detection, OCR, inpainting (source-text removal), and an LLM translation step, then rendering vertical CJK / RTL text and exporting layered PSDs. It runs GGUF models locally via llama.cpp (CUDA/Vulkan/Metal) by default, but the koharu-llm crate ships explicit provider modules (openai.rs, claude.rs, gemini.rs, deepseek.rs, openai_compatible.rs) so a user can instead plug in their own hosted API key for OpenAI, Anthropic Claude, Google Gemini, DeepSeek, or any OpenAI-compatible endpoint (OpenRouter, LM Studio), plus machine-translation services (DeepL, Google Cloud Translation, Caiyun). API keys are stored in the OS keychain via the Rust `keyring` crate (set_password/get_password) rather than plaintext config, with a filesystem credential fallback on Linux. Ships an HTTP API and MCP server for automation, runs on Windows/macOS/Linux, and offers a Docker headless mode.

How your API key is handled

Your API key is stored locally on your device. Requests are sent directly to the AI provider. Because it can be self-hosted, your key never has to touch a third-party backend.

Setup

Open settings, paste your provider API key, choose a model, and start — the key stays on your device.