Permanent Retention

I have a use case that generates a few hundred data points per day. As our projects last 3-5 years, we would like to retain this data for much longer than the 13 months listed on the pricing page.

Is there any way to set this up with Grafana Cloud, or will I have to use a self-hosted solution instead?

Typically extended retention past 13 months would be part of a custom enterprise contract. Given the volume, that will probably not be the best option. For storage that long I might recommend a self-hosted Prometheus/Mimir instance and use Grafana Cloud to query that DB (so you don’t need to host everything).