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Updated October 11, 2026 Raff runs five engines. They share the same dashboard, API, plans and billing; what differs is what each is good at and a few engine-specific details.

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How it works

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PostgreSQL

The default choice for apps, APIs and AI. Versions 18, 17, 16 and 15; 18 when you do not choose.
  • Two addresses: a pooler (PgBouncer, transaction mode) for app traffic and a direct connection for migrations and session features. See Connection pooling.
  • Extensions such as vector (pgvector), pg_trgm and pg_stat_statements. See Turn on extensions.
  • Point-in-time restore to any second, high availability with a standby, and read replicas.
  • Database defaultdb, admin user raffadmin.

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MySQL

For WordPress, Laravel and apps already on MySQL. Version 8.0 (Percona Server).
  • One address on port 3306.
  • High availability runs a 3-node cluster (Galera) where every node holds all data.
  • Point-in-time restore from the binary log.
  • Database defaultdb, admin user raffadmin.

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Valkey

The open-source, Redis-compatible in-memory store, version 8. Any Redis client works over TLS (rediss://).
  • Choose at create what happens when memory is full: Cache removes the least recently used keys; Queue or data keeps every key and refuses new writes.
  • Snapshots every night; a restore can lose up to a day of keys.
  • High availability adds a standby with automatic failover (Sentinel).

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ClickHouse

Column-oriented analytics: logs, events, metrics, dashboards over billions of rows. Version 25.8.
  • Two addresses: HTTPS (8443) for HTTP clients and drivers, native TCP (9440) for clickhouse-client.
  • High availability runs two replicas and a coordination service (ClickHouse Keeper). Use Replicated* table engines so tables are copied to both.
  • Load data from CSV or Object Storage in the Tables tab.

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Kafka

Event streaming between services, version 4.3 (KRaft, no ZooKeeper).
  • Private only: reach it from your VPC. Clients connect with SASL_SSL and SCRAM-SHA-512 and must trust the database’s CA certificate.
  • High availability runs 3 brokers and copies every topic to all three.
  • Topics are created on first use, and messages are kept 7 days by default.
  • No backups: copies on the brokers protect the data.

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Which engine

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Trade-offs

  • The engine and its major version are fixed after create. To move, create a new database and copy the data.
  • The free plan covers PostgreSQL, MySQL and Valkey. ClickHouse and Kafka start at their smallest paid plan.

Plans and sizing

Plans, connections and storage per engine.

Create a database

Pick an engine and create it.
Last modified on October 11, 2026