We built WeaveScope for Elixir teams running AI agents on the BEAM.

Its native Elixir library, BeamWeaver, captures complete trace trees for agent runs, model calls, tool calls, errors, inputs, and outputs - plus waterfall timing, latency, token usage, and model cost. When an agent is slow, expensive, or wrong, you can see exactly which step caused it, including concurrent work across BEAM tasks.

Our goal is simple: give Elixir developers the best tracing experience for AI applications, without a Python sidecar or a generic observability stack bolted on afterward.

It’s free to try. The Free plan includes 100,000 span events, 14-day retention, and one project. Add the native library, create an API key, and inspect your first trace at weavescope.com.