Track LLM costs by customer & feature
Automatically track costs per customer and feature. Get real-time insights, prevent bill shock, and optimize your AI spend, with just a few lines of code.
Everything you need to track LLM costs
From zero-code setup to advanced analytics, LangSpend gives you complete visibility into your AI spending without any friction.
Customer Attribution
Automatically track costs per customer with Supabase integration or manual tagging.
Feature Attribution
Smart endpoint detection groups your API routes into features automatically.
Real-Time Dashboard
See costs, requests, and trends update in real-time with beautiful visualizations.
Frequently asked questions
Everything you need to know about LangSpend. Can't find what you're looking for?Contact our team.
No! LangSpend uses a simple wrapper pattern. You just wrap your existing LLM client once, and all your existing code continues to work unchanged. It's a one-line change that enables complete cost tracking.
Yes! LangSpend automatically tracks costs per customer when you provide customer identification in your SDK calls. We also support Supabase integration for automatic customer sync, so you can see exactly which customers are driving your AI costs.
LangSpend automatically detects which API endpoints or functions are making LLM calls and groups them into features. You can also manually tag features for more granular control. This helps you identify which parts of your application are most expensive.
The free tier includes up to $100/month in tracked costs, 7-day data retention, basic dashboard, and email support. It's perfect for getting started and small projects. You can upgrade anytime for more capacity and advanced features.
Yes! LangSpend fully supports streaming responses from all providers. We track the total tokens used after the stream completes, so you get accurate cost attribution even for streaming use cases.
Still have questions?
Our team is here to help. Get in touch and we'll get back to you within 24 hours.