Most folks will choose either Zipkin or Jaeger, but both are OpenTracing-compatible distributed tracing systems. You might find the Cloud Native Landscape useful for thinking about the options: https://github.com/cncf/landscape/blob/master/README.md
Disclosure: I’m the executive director of CNCF, which just adopted Jaeger 2 weeks ago, and I’m an author of the landscape.
Disclosure: I’m the executive director of CNCF, which just adopted Jaeger 2 weeks ago, and I’m an author of the landscape.