Managed relational, NoSQL, and object storage compared across the four major clouds — where they match, where they diverge, and where one provider genuinely has no equivalent.
What this is not: this is not a performance benchmark, a pricing calculator, or a recommendation engine. It is an equivalence map — it tells you what managed service in Cloud B is the closest structural match to the one you use in Cloud A, and where the match breaks down. For pricing, use the Egress Cost Map and the compute observatories. For decisions ("Aurora or RDS?"), see Decisions.