Depends on your use case. If the volume of data you're looking at is not much, Sentry is more feature rich and refined.
If you want to expose a logging interface to your customers and/or easily integrate large volumes of structured event type data into the rest of your infra, then maybe look at Logflare.
If you want to expose a logging interface to your customers and/or easily integrate large volumes of structured event type data into the rest of your infra, then maybe look at Logflare.