重要なポイント
- Open WebUI: Professional, clean, multi-user, fast inference integration.
- SillyTavern: Character-focused, roleplay-first, single-user.
- Use Open WebUI for work, research, general chat.
- Use SillyTavern for creative writing, character simulation, storytelling.
- Both support local LLM backends (Ollama, vLLM, llama.cpp).
- Open WebUI is faster (written in Go/TypeScript). SillyTavern is slower (browser-native).
- Neither adds speed benefit—backend (Ollama, vLLM) is the bottleneck.
- Can run both simultaneously on different ports for different workflows.
Feature Comparison
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Chat Experience Differences
Open WebUI: Conversation-focused. Clean sidebar, token counter, context window display. Professional chat interface.
SillyTavern: Character-focused. Character avatar, persona details, world-building context. Optimized for immersive roleplay.
For Q&A and research: Open WebUI.
For storytelling and character development: SillyTavern.
Multi-User & Team Use
Open WebUI: Built-in multi-user support. Each user has separate conversation history, API keys, settings. Deploy on server for team access.
SillyTavern: Single-user only. Share instance via localhost, but conversations overwrite each other.
For teams: Open WebUI is the only option.
For individuals: SillyTavern is fine.
Character/Roleplay Capabilities
Open WebUI: Basic system prompts. Good for setting tone, instructions. Not character-focused.
SillyTavern: Character cards (JSON format) store persona, appearance, speech patterns, relationships. Designed for roleplay.
SillyTavern supports "world info" (lore, context that persists across conversations).
For serious roleplaying: SillyTavern.
For work/research: Open WebUI.
Customization & Theming
Open WebUI: Basic theming (dark/light mode). Plugins for extensions.
SillyTavern: Deep UI customization. Character artwork, UI layout tweaks, custom themes.
SillyTavern appeals to customization enthusiasts. Open WebUI prioritizes simplicity.
Common Questions
- Expecting SillyTavern to work over LAN. Requires special setup; not multi-user friendly.
- Thinking Open WebUI is slower due to "being more feature-rich." Both use same backend—speed is Ollama/vLLM, not the UI.
- Running both simultaneously expecting them to share models. They don't—run two separate Ollama instances or use vLLM load balancing.
FAQ
Should I use Open WebUI or SillyTavern?
Open WebUI for work/research. SillyTavern for creative writing/roleplay. Different tools, different jobs.
Can I use SillyTavern for team chat?
Not easily. Single-user design. For teams, use Open WebUI (built-in multi-user).
Is one faster than the other?
No. Both are UI layer on top of Ollama/vLLM. Backend speed is identical.
Can I import SillyTavern characters into Open WebUI?
No. Different formats. SillyTavern uses character cards; Open WebUI uses system prompts.
Which one should a beginner start with?
Open WebUI. Simpler, cleaner, less overwhelming. SillyTavern if you like character-building.
Can I run both simultaneously?
Yes, on different ports. E.g., Ollama on 11434, Open WebUI on 3000, SillyTavern on 3001.
Sources
- Open WebUI official documentation and GitHub
- SillyTavern documentation and community guides
- Character card specification (TavernAI format)