Good observability tool recommendation - Cloud Based

I work in two companies, one very big that have a giant budget to spend on Datadog, and another small one, that don't have that very big budget. On the small company we are looking to migrate from Prometheus + Grafana + Alert Manager to something cloud based. Mostly because we are a small team (3 people only) and we don't have time to spend maintaining the infrastructure for it to run. Now, is there some good alternative to Datadog? Datadog is the