Axiom is an observability platform that natively supports OpenTelemetry, you just need to route the traces to Axiom’s endpoint and set the dataset, and API key: 
TRACELOOP_BASE_URL="https://api.axiom.co"
TRACELOOP_HEADERS="Authorization=Bearer <YOUR_API_KEY>,X-Axiom-Dataset=<YOUR_DATASET>"
For more information check out the docs link.