Hello IndieHackers! 👋🏾 What SaaS solutions do you use to collect application metrics for your backend?

After a little Googling, the prices I see are not very respectful of my bootstrap situation.

Writing this to do a quick poll and see what folks are actually using:
Are you using Datadog, New Relic, or any of the heavy hitters?
Did you roll your own? ELK stack? Prometheus? Grafana?
Or did you manage to find an affordable APM SaaS product?

I'd really appreciate the feedback!! 👍🏾