Best In-Memory Databases in 2026
Updated
In short: eXtremeDB is ranked #1 of 24 as of 4 October 2026, ahead of Aerospike Database and Infinispan. The best-ranked option with a free plan is Aerospike Database. The lowest first paid tier on this page is GridGain at $0.11/mo.
When an application relies on data held in memory, the database choice affects both data handling and operational fit. Compared on data persistence, deployment, high availability, and included memory, these entries also distinguish themselves through SQL support, supported data models, and vector search. Free-plan availability and paid-from pricing add cost details to weigh alongside those capabilities. eXtremeDB, Aerospike Database, and Infinispan are among the products to consider as you compare approaches. Think about the persistence and availability your workload calls for, which data models and query features it needs, and where you expect to deploy. The listed criteria offer a way to compare those needs without treating any single capability as decisive.
24 in-memory databases ranked on what their makers publish — plans and prices, free tiers, platforms and the facts on their own pages.
Recognised 40% · Phone app 26% · Documented 20% · Free plan 14% of the score
- 1 eXtremeDB iPhone + Android RecognisedPhone appDocumentedFree plan 8.2 Deployment: bothData persistence: YesHigh availability: Yes
- 2 Aerospike Database No phone app RecognisedPhone appDocumentedFree plan 7.9Free
- 3 Infinispan No phone app RecognisedPhone appDocumentedFree plan 7.8Free
- 4 RonDB No phone app RecognisedPhone appDocumentedFree plan 7.5Free Deployment: bothData persistence: YesHigh availability: Yes
- 5 Apache Geode No phone app RecognisedPhone appDocumentedFree plan 7.4Free Deployment: self-hostedData persistence: YesHigh availability: Yes
- 6 VoltDB No phone app RecognisedPhone appDocumentedFree plan 7.3Free Deployment: bothData persistence: YesHigh availability: Yes
- 7 Couchbase Server No phone app RecognisedPhone appDocumentedFree plan 7.2
- 8 SingleStore Helios No phone app RecognisedPhone appDocumentedFree plan 7.1$0.99/mo High availability: Yes
- 9 RaimaDB iPhone + Android RecognisedPhone appDocumentedFree plan 6.9 High availability: Yes
- 10 Tarantool DB No phone app RecognisedPhone appDocumentedFree plan 6.8
- 11 Apache Ignite No phone app RecognisedPhone appDocumentedFree plan 6.5
- 12 Valkey No phone app RecognisedPhone appDocumentedFree plan 6.4
- 13 Amazon ElastiCache No phone app RecognisedPhone appDocumentedFree plan 6.3$6/mo High availability: Yes
- 14 GridGain No phone app RecognisedPhone appDocumentedFree plan 6.1$0.11/mo Deployment: bothData persistence: YesHigh availability: Yes
- 15 KeyDB No phone app RecognisedPhone appDocumentedFree plan 6.1 Deployment: self-hostedData persistence: YesHigh availability: Yes
- 16 Redis Insight No phone app RecognisedPhone appDocumentedFree plan 6.1Free Deployment: both
- 17 Dragonfly No phone app RecognisedPhone appDocumentedFree plan 5.8$36/mo Deployment: bothData persistence: YesHigh availability: Yes
- 18 ALTIBASE No phone app RecognisedPhone appDocumentedFree plan 5.7 High availability: Yes
- 19 Amazon MemoryDB No phone app RecognisedPhone appDocumentedFree plan 5.6
- 20 SAP HANA Cloud No phone app RecognisedPhone appDocumentedFree plan 5.5
- 21 ScaleOut In-Memory Database No phone app RecognisedPhone appDocumentedFree plan 5.2 Deployment: self-hostedHigh availability: Yes
- 22 DiceDB No phone app RecognisedPhone appDocumentedFree plan 5.1 Deployment: self-hostedData persistence: No
- 23 VMware Tanzu Platform No phone app RecognisedPhone appDocumentedFree plan 4.4
- 24 Erlang Debugger No phone app RecognisedPhone appDocumentedFree plan 4.3
Is your app on this list?
Numbered spots on this list can be sponsored. They are labelled, and the editorial order and scores never change for payment.
Questions about this list
Which in-memory database is ranked first on Samsung Mobile US Press?
eXtremeDB is ranked #1 of 24 with a score of 8.2. Aerospike Database is second and Infinispan third.
How many of these have a free plan?
8 of the 24 on this page publish a free plan on their own pricing pages.
Which is the cheapest paid option?
On this page, GridGain has the lowest first paid tier we found: $0.11/mo.
How is this list ranked?
Ranked mobile-first: a phone app alongside the web or desktop product, a free tier and the depth of its documentation. Paid placements never change a rank.