How to choose an Opentelemetry backend vendor?

With Opentelemetry becoming the new standard of tracing, and it being vendor-agnostic, how do we then choose a backend vendor for opentelemetry?

For example, there are currently many vendors that supports Opentelemetry like GCP Cloudtrace, Datadog, Dynatrace, Lightstep, Instana. How do you choose a vendor for just opentelemtry? Or it doesn't matter at all since opentelemetry is cloud-agnostic and we can just choose the cheapest one to store our traces

Disclosure: I'm a developer at Aspecto.

Some parameters I would consider:

• Cost and plan compared to the scale
• Search capabilities: can I search my traces easily and accurately
• Sampling capabilities
• Works well with my infrastructue
• Supported languages
• Can handle high scale
• Good support, responsive
• Smooth UX, clear visualizations
• Data retention

What qualifies a vendor? (list)
A vendor can be considered "Support OpenTelemetry" or "Implements OpenTelemetry".

Support OpenTelemetry:

The vendor must accept the output of the default SDK through one of two mechanisms:

1. By providing an exporter for the OpenTelemetry Collector and/or the OpenTelemetry SDKs
2. By building a receiver for the OpenTelemetry protocol

Implements OpenTelemetry:

A vendor with a custom SDK implementation will be listed as "Implements OpenTelemetry". If the custom SDK is optional, the vendor can be listed as "Supports OpenTelemetry".