Perhaps you could consider hosting redis on lightsail? It might be the cheapest memory option within AWS (so traffic is free and fast). But it sounds like you'r

Perhaps you could consider hosting redis on lightsail? It might be the cheapest memory option within AWS (so traffic is free and fast). But it sounds like you're trying to use it as a database? I'll still go with managed MySQL/postgres - you can use the database's backup and restore abilities top switch providers fairly seamlessly- I have done it from gcp to AWS. Which is why I suck it up to RDS.