Capwatch vs Langfuse
Langfuse: Open-source LLM tracing and evals, with cost per trace and per user. Add the Langfuse SDK to your code and send traces. Bought by ClickHouse in January 2026; still open source.
| Capwatch | Langfuse | |
|---|---|---|
| Price | $15/mo Pro, free for 1 provider | Core $29/mo |
| Setup | Paste a read-only admin key | SDK tracing in your code |
| Sees calls you didn't instrument | Yes (billing data) | No |
| Forecast to month end | Yes | No |
| Budget and anomaly alerts | Email, Telegram, push | Limited |
| Kill switch | Yes | No |
Which should you pick?
Pick Langfuse to debug and evaluate prompts. Pick Capwatch for the money side: budgets, forecasts, alerts and a stop button, with no code changes.
Prices and facts checked on 9 November 2026 from public pages. Tell us if something changed: [email protected]