DragonflyDB
Redis and Memcached-compatible in-memory data store delivering up to 25x higher throughput than Redis on a single instance via a multi-threaded, shared-nothing architecture.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
TLS available but not enabled by default on self-hosted instances. ACL support for user-level permissions. Self-hosted deployments require explicit hardening — bind to localhost, enable auth, use TLS for production.
⚡ Reliability
Best When
You need Redis-compatible caching at higher throughput than Redis can provide on a single node, or you want to reduce infrastructure costs by consolidating Redis shards.
Avoid When
You require Redis Cluster wire compatibility, are using obscure Redis commands not yet implemented in DragonflyDB, or need a fully managed serverless cache.
Use Cases
- • High-throughput agent session state storage where Redis becomes a bottleneck under concurrent agent worker load
- • Drop-in Redis replacement for caching LLM responses, embeddings, or tool call results with no code changes required
- • Serving as a fast vector-adjacent cache layer storing agent working memory with sub-millisecond read latency
- • Multi-agent coordination via Redis-compatible pub/sub and streams at significantly higher message throughput than Redis
- • Cost reduction by consolidating multiple Redis shards onto a single DragonflyDB instance with equivalent throughput
Not For
- • Permanent durable storage — DragonflyDB is an in-memory store; persistence is optional and recovery after crash may have data loss
- • Workloads requiring Redis Cluster protocol compatibility — DragonflyDB uses a different clustering model and is not wire-compatible with Redis Cluster clients
- • Managed fully-serverless deployments — DragonflyDB Cloud is available but the self-hosted model requires infrastructure management
Interface
Authentication
Self-hosted: authentication is optional, configurable via Redis AUTH or ACL users. DragonflyDB Cloud uses API key authentication. No auth is the default for local development.
Pricing
BSL 1.1 license — free for self-hosted use; restrictions apply to offering DragonflyDB as a competing managed service. Enterprise licenses available.
Agent Metadata
Known Gotchas
- ⚠ Not all Redis commands are implemented — agents using OBJECT ENCODING, DEBUG, or less-common commands will receive WRONGTYPE or unimplemented errors that differ from Redis behavior
- ⚠ DragonflyDB uses a different replication protocol than Redis — existing Redis Sentinel or Cluster failover tooling may not work without reconfiguration
- ⚠ Memory eviction policies are configurable but defaults may differ from Redis — agents that rely on Redis's maxmemory-policy LRU behavior must explicitly configure it
- ⚠ MULTI/EXEC transactions are supported but performance characteristics differ from Redis — benchmarks should be re-run rather than assuming Redis transaction performance applies
- ⚠ Persistence (RDB/AOF) is optional and disabled by default — agents that assume data survives process restart must explicitly enable and configure snapshot or AOF persistence
Alternatives
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Scores are editorial opinions as of 2026-03-06.