Welcome to NorthSignal
NorthSignal is a unified AI workspace. Instead of juggling subscriptions to ChatGPT Plus, Claude Pro, and Gemini Advanced, NorthSignal brings every major LLM into a single, beautifully designed interface.
You bring your own API keys. We handle everything else.
Quick Start Checklist
Get up and running in under 5 minutes:
- Create your account — Sign in with Google OAuth.
- Add an API key — Connect at least one provider (OpenAI, Anthropic, or Google).
- Start chatting — NorthSignal's Intelligent Router will automatically select the best model for every prompt.
What Makes NorthSignal Different?
| Feature | ChatGPT Plus | Claude Pro | NorthSignal |
|---|---|---|---|
| Monthly cost | $20/month | $20/month | Free (pay-per-use via your own keys) |
| Models available | GPT-5 | Claude Sonnet 4.5 | All of the above + Gemini |
| Automatic model selection | ❌ | ❌ | ✅ Intelligent Routing |
| Cross-model memory | ❌ | ❌ | ✅ Persistent Memory (RAG) |
| Custom themes | ❌ | ❌ | ✅ Full personalization |
How It Works
Unified Input
Type your request into a single interface. Attach files, paste code snippets, or ask complex questions — NorthSignal accepts all modalities supported by modern LLMs.
Intelligent Routing
Our proprietary routing engine evaluates your prompt in milliseconds:
- Complex coding tasks → routed to Claude (best-in-class for code)
- Creative writing & logic → routed to GPT-5 (fast + versatile)
- Massive documents → routed to Gemini (largest context window)
You always get the highest-quality answer at the lowest cost — automatically.
Persistent Memory
Traditional LLM chats forget what you said last week. NorthSignal combines a short-term rolling context with a long-term vector database (RAG). Switch from GPT to Claude mid-conversation without losing the thread, or reference a document you uploaded a month ago.
Explore the Docs
- API Key Setup — Connect your providers securely.
- Features & Workflows — Learn about routing, memory, and personalization.
- Troubleshooting — Fix common issues quickly.