Rivet

Rivet belongs in the catalog because more AI and realtime products now need durable coordination and stateful backend behavior that sits between classic serverless and full cluster ownership. The official Cloud product is built around actors, reads, writes, storage, and awake actor-hours, which makes it relevant to developers building persistent multiplayer systems, agent backends, or coordination-heavy products that do not fit neatly into request-response serverless patterns.

It also deserves inclusion because the pricing is unusually detailed for this kind of runtime. Rivet publishes a free plan, paid tiers with included quotas, and explicit overage rates for awake actor-hours, reads, writes, storage, and egress. That gives teams a better chance of modeling real operating costs before committing to an architecture around it.