SillyTavern vs Janitor AI: local power tool or hosted platform?

Quick answer: pick by how much you want to tinker

SillyTavern wins on control. It is free, open source software you run on your own machine, it connects to almost any API backend or local model server, and its extension ecosystem (lorebooks, vector memory, text-to-speech, image generation, group chats) has no real equal among roleplay frontends. The tradeoff is setup: you install Node.js, pull a repository, and configure a model backend yourself before the first message is sent. Janitor AI wins on convenience and community. Open a browser, pick a character from the on-site library, and start chatting. The tradeoff is control: chats live on the platform's servers, there is no extension system, and once you outgrow the built-in models you end up configuring an external API endpoint by hand anyway. The two are not mutually exclusive. A common path is starting on Janitor AI for the character library, then moving to SillyTavern once chat length, memory management, or privacy starts to matter. Character cards can move between them, and the same API key can serve both.

What each one actually is

SillyTavern is a locally installed web interface for chatting with large language models. It ships with no models of its own. You run it with Node.js on Windows, macOS, or Linux (or on Android through Termux), open it at a localhost address, and point it at a backend: an OpenAI-compatible API, Anthropic, Google, or a local server such as KoboldCpp or Ollama. Characters, chats, presets, and world info are all plain files on your device, which is why the project attracts people who treat roleplay like a hobby they maintain, not just a site they visit. Janitor AI is a hosted character chat platform. The site maintains a large community library of user-created character cards, runs the chat interface for you, and lets you talk to built-in models or to an external model through the proxy settings on each chat. There is nothing to install, and conversations follow your account across devices because they are stored server-side. That distinction matters more than any single feature: SillyTavern is software you own and operate, Janitor AI is a service you use.

SillyTavern vs Janitor AI head to head

The table below covers the dimensions people actually decide on. Both projects update frequently, so treat this as the stable shape of each tool rather than a frozen feature list.

Setup difficulty: an evening vs five minutes

SillyTavern setup is not hard, but it is real work the first time. The standard path: install Node.js LTS, clone the SillyTavern repository (or use the official launcher), run the start script for your OS, and open the local address it prints. From there you still need a backend, which means creating an API connection in the settings panel or wiring up a local model server. Budget 20 to 60 minutes for a first install, and expect occasional maintenance since updates arrive through git. Janitor AI setup is an account and a click. The platform's terms require users to be 18 or older, so you register, confirm, pick a character, and chat with a built-in model immediately. The only configuration moment arrives if you want to bring your own model, which happens in the proxy settings and takes a few fields. If the SillyTavern paragraph above sounded tedious rather than fun, that is a genuine signal: the people who love SillyTavern are the ones who enjoyed reading it.

Connecting an API: where the two frontends diverge

Both frontends do their best writing with a model you choose yourself, and this is where an OpenAI-compatible gateway earns its place: one key, one balance, and the full model catalog behind a single endpoint. APIsRouter works with both frontends this way, with pay-as-you-go billing and no subscription, a no-signup checkout at /topup that emails the key after payment, a first top-up that adds +100% balance, and catalog rates that run 20% below official pricing on global models and below official on Chinese models. The configuration difference between the two frontends trips up nearly everyone at least once. SillyTavern wants a base URL that stops at /v1, and it then calls /v1/models itself to auto-populate the model dropdown. Janitor AI does not fetch a model list: it wants the full chat completions endpoint, plus the model name typed exactly, plus the key.

# SillyTavern: API Connections > Chat Completion > Custom (OpenAI-compatible)
Base URL:  https://api.apisrouter.com/v1
API Key:   sk-APIsRouter-...
Model:     pick from the dropdown (auto-populated from /v1/models)

# Janitor AI: proxy settings on the chat need the FULL endpoint
Proxy URL: https://api.apisrouter.com/v1/chat/completions
Model:     deepseek-v4-flash
API Key:   sk-APIsRouter-...

Which models to run behind either frontend

Frontend choice shapes the workflow, but model choice shapes the actual writing. The catalog rates below are USD per million tokens, input and output, except where noted. DeepSeek V4 Flash is the community favorite for roleplay and the default recommendation for long chats: fast, cheap enough that hundred-message sessions stay affordable, and consistent in character. DeepSeek V4 Pro is the step up when a card has a lot of detail to keep straight. GLM-5, Kimi K2.6, and MiMo are solid value picks worth testing against your own cards. For content-policy questions around fiction, read the provider's published policy rather than community hearsay: xAI's published policy permits mature themes in fictional contexts, while Anthropic's policy prohibits explicit content, which makes Claude the pick for SFW creative writing where prose quality matters most.

Privacy and content policies, without the folklore

Privacy splits cleanly. SillyTavern stores every chat, character, and setting as local files; the only data that leaves your machine is the prompt sent to whichever backend you configured, and a fully local backend keeps even that at home. Janitor AI stores conversations on its servers under your account, which is what makes cross-device sync work, and its data handling is governed by the platform's own privacy policy. Content policy is a property of the model provider, not the frontend. Neither SillyTavern nor Janitor AI changes what a model will or will not write; the provider's usage policy travels with the model wherever you call it from. Understanding those policies before you commit to a model saves frustration: some providers publish flexible policies for fictional content, others draw firm lines, and all of them expect users to respect age requirements and platform terms. Janitor AI's own terms set an 18+ requirement for the platform, and SillyTavern's documentation likewise assumes adult users administering their own software.

Who should pick which

There is no wrong answer here, only a mismatch risk: power users get bored inside a hosted platform, and casual users abandon software that needs git. Match the tool to your tolerance for maintenance, not to what a forum thread says is superior.

• Pick SillyTavern if you run long campaigns that need memory tools, want group chats with multiple characters, care where your chat logs physically live, or enjoy swapping models mid-conversation to compare prose.
• Pick Janitor AI if you want to browse a huge character library, chat from a phone browser with zero maintenance, and keep sessions casual.
• Start on Janitor AI, graduate to SillyTavern: the most common trajectory. Your API key and your favorite characters both survive the move.
• Use both in parallel: one gateway key covers the SillyTavern base URL config and the Janitor AI proxy config from the same balance.

FAQ