In-Memory & Key-Value Databases

Amazon ElastiCache vs Dragonfly

Compare Amazon ElastiCache and Dragonfly side-by-side. See feature differences and pricing in the In-Memory & Key-Value Databases category.

Amazon ElastiCache

by Amazon

No reviews yet

Pricing: Usage-based, US East (Ohio): Serverless Valkey $0.084 per GB-hour plus $0.0023 per million ECPUs; nodes from $0.0128 an hour; reserved nodes up to 52% off; AWS Free Tier credits.

Amazon ElastiCache is a managed in-memory cache from AWS for Valkey, Redis OSS and Memcached, run serverless or on nodes you choose and billed by usage.

15 /17 features Full profile

Dragonfly

by DragonflyDB

No reviews yet

Pricing: Dragonfly Cloud Flex from $36/mo, billed monthly on demand at $8.00 per GB of memory plus network charges; Business from $2,000/mo; Self-Managed by quote.

Dragonfly is a Redis and Memcached compatible in-memory data store you run yourself or as the managed Dragonfly Cloud, with cloud memory billed per GB.

14 /17 features Full profile

Feature Comparison

In-Memory & Key-Value Databases features side-by-side

Feature	Amazon ElastiCache 15/17 features	Dragonfly 14/17 features
Rich data structures beyond strings Lists, hashes, sets, sorted sets and streams stored and manipulated server-side, not only opaque blobs.	Yes	Yes
Per-key expiration and eviction policies Keys expire on a TTL, and the store evicts by LRU, LFU or random selection when memory is full.	Yes	Yes
Snapshot persistence to disk Periodic point-in-time dumps of the in-memory dataset written to disk for restart recovery.	Yes	Yes
Append-only log persistence Every write is appended to a durable log so a restart loses at most a second or so of data.	Yes	No
Replica failover with automatic promotion Replicas stream from the primary and a sentinel or cluster manager promotes one when the primary dies.	Yes	Yes
Horizontal clustering of the keyspace The keyspace is sharded across nodes with client redirection, growing capacity beyond one host.	Yes	Yes
Active-active geo replication Writes accepted in several regions and merged with conflict-free replicated data types.	No	No
Pub/sub messaging channels Clients publish to and subscribe on channels for lightweight fan-out messaging.	Yes	Yes
Atomic server-side scripting Scripts or functions run atomically on the server against several keys in one call.	Yes	Yes
SSD tiering beyond available RAM Less-used values spill to SSD so the dataset can exceed memory at a lower cost per gigabyte.	Yes	Yes
Secondary indexes on stored values Hashes or JSON values indexed on their fields and queried with filters, not only fetched by key.	Yes	Yes
Native JSON value type JSON stored as a native type with path-level reads and updates on the server.	Yes	Yes
Multi-threaded request handling The server executes commands on several cores in parallel rather than on one event loop.	Yes	Yes
Per-user command and key ACLs Named users restricted to specific commands and key patterns, with TLS on client connections.	Yes	Yes
Client-side caching invalidation The server tracks keys a client has cached locally and pushes an invalidation when they change.	Yes	Yes
Streams with consumer groups An append-only log type with consumer groups for at-least-once processing by several workers.	Yes	Yes
Keyspace memory reporting Commands or dashboards report memory per key, the largest keys and fragmentation.	No	No
Overall Rating	No reviews yet	No reviews yet

Amazon ElastiCache 15/17 features

Rich data structures beyond strings: Yes
Per-key expiration and eviction policies: Yes
Snapshot persistence to disk: Yes
Append-only log persistence: Yes
Replica failover with automatic promotion: Yes
Horizontal clustering of the keyspace: Yes
Active-active geo replication: No
Pub/sub messaging channels: Yes
Atomic server-side scripting: Yes
SSD tiering beyond available RAM: Yes
Secondary indexes on stored values: Yes
Native JSON value type: Yes
Multi-threaded request handling: Yes
Per-user command and key ACLs: Yes
Client-side caching invalidation: Yes
Streams with consumer groups: Yes
Keyspace memory reporting: No

No reviews yet

Dragonfly 14/17 features

Rich data structures beyond strings: Yes
Per-key expiration and eviction policies: Yes
Snapshot persistence to disk: Yes
Append-only log persistence: No
Replica failover with automatic promotion: Yes
Horizontal clustering of the keyspace: Yes
Active-active geo replication: No
Pub/sub messaging channels: Yes
Atomic server-side scripting: Yes
SSD tiering beyond available RAM: Yes
Secondary indexes on stored values: Yes
Native JSON value type: Yes
Multi-threaded request handling: Yes
Per-user command and key ACLs: Yes
Client-side caching invalidation: Yes
Streams with consumer groups: Yes
Keyspace memory reporting: No

No reviews yet

Pricing

Amazon ElastiCache

Usage-based, US East (Ohio): Serverless Valkey $0.084 per GB-hour plus $0.0023 per million ECPUs; nodes from $0.0128 an hour; reserved nodes up to 52% off; AWS Free Tier credits.

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Dragonfly

Dragonfly Cloud Flex from $36/mo, billed monthly on demand at $8.00 per GB of memory plus network charges; Business from $2,000/mo; Self-Managed by quote.

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