The Best In-Memory Databases in 2026
We researched in-memory databases through official websites, including pricing pages, plan tables and product documentation. Products are ranked on their core job, value for money and verified features, helping teams compare low-latency data stores for applications, analytics and distributed workloads.
Our top picks
-
Top ranked
Couchbase Server#1 of 249.4/10A broad in-memory platform with free production use and extensive database capabilities.
Free plan
-
Runner-up
Apache Ignite#2 of 249.2/10Open-source distributed SQL with in-memory speed, persistence, transactions, and compute.
Open source
-
Top-ranked free plan
Infinispan#3 of 249.0/10A Java-centric choice for clustered caching, persistence, replication, and search.
Free plan
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
The full ranking 24 tools, best first
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Best forTeams wanting a broad, flexible in-memory platform
A broad in-memory platform with free production use and extensive database capabilities.
- Vector search
9.4/10★★★★★Visit Couchbase -
Best forOpen-source distributed SQL and in-memory systems
Open-source distributed SQL with in-memory speed, persistence, transactions, and compute.
9.2/10★★★★★Visit Apache Ignite -
Best forJava-centric clustered caching and search
A Java-centric choice for clustered caching, persistence, replication, and search.
9.0/10★★★★☆Visit Infinispan -
Best forHigh-scale distributed key-value workloads
A distributed database for demanding real-time workloads, with broad storage and replication options.
8.8/10★★★★☆Visit Aerospike -
Best forOpen-source Redis-compatible deployments
A free, self-hosted datastore for caching, messaging, streaming, and database workloads.
8.7/10★★★★☆Visit Valkey -
Best forOpen-source self-hosted key-value and document systems
A self-hosted choice for teams needing clustered, persistent in-memory data services.
8.6/10★★★★☆Visit Tarantool -
Best forEmbedded and edge applications needing durability
A broad embedded database for durable, real-time, and distributed workloads.
- SQL support
- Vector search
- Data persistence
8.5/10★★★★☆Visit McObject -
Best forOpen-source distributed SQL with Kubernetes deployment
A Kubernetes-ready distributed SQL database for scalable, highly available workloads.
- SQL support
- Data persistence
- High availability
8.4/10★★★★☆Visit RonDB -
Best forFree distributed regions and event-driven caching
Free, open-source distributed regions for event-driven caching and data-intensive applications.
- Data persistence
- High availability
8.3/10★★★★☆Visit Apache Geode -
Best forReal-time transactional SQL workloads
A strong fit for low-latency SQL workloads that need transactions, persistence, and replication.
- SQL support
- Data persistence
- High availability
8.2/10★★★★☆Visit VoltDB -
Best forAWS-native durable Redis-compatible workloads
A durable, AWS-integrated choice for Redis-compatible applications that need scale and recovery.
8.0/10★★★★☆Try Amazon MemoryDB -
Best forManaged distributed SQL with a free entry tier
A managed distributed SQL service with a free tier and usage-based production plans.
- High availability
7.9/10★★★★☆Visit SingleStore -
Best forEstablished hybrid SQL database deployments
A SQL database for established deployments that need hybrid storage and high availability.
- High availability
7.8/10★★★★☆Visit ALTIBASE -
Best forLarge enterprises needing managed analytical breadth
A managed in-memory database for enterprises combining broad data models and SAP connectivity.
- High availability
7.7/10★★★★☆Visit SAP HANA Cloud -
Best forEnterprise in-memory SQL and data processing
A broad enterprise platform combining in-memory speed, persistence, SQL, and distributed processing.
- SQL support
- Vector search
- Data persistence
7.6/10★★★★☆Visit GridGain -
Best forEmbedded, cross-platform edge database deployments
A broad, embedded database for edge, mobile, IoT, and mission-critical applications.
- High availability
7.5/10★★★★☆Visit RaimaDB -
Best forRedis-compatible managed service with search features
Dragonfly adds search, persistence, and scaling to a Redis-compatible datastore.
- Vector search
- Data persistence
- High availability
7.4/10★★★★☆Visit Dragonfly -
Best forFree self-hosted multithreaded Redis-compatible use
A free, self-hosted Redis-compatible database for multithreaded workloads.
- Data persistence
- High availability
7.3/10★★★★☆Visit KeyDB -
Best forRedis-compatible self-hosted consistency and resilience
A self-hosted Redis-compatible database for distributed applications needing consistency and resilience.
- High availability
7.2/10★★★★☆Visit ScaleOut -
Best forAWS-managed Valkey, Redis, or Memcached caches
A flexible AWS-managed cache with strong availability and integration depth.
- High availability
7.0/10★★★★☆Visit site -
Best forRedis-compatible caching with query subscriptions
A focused self-hosted cache for Redis-compatible workloads that need reactive query updates.
6.8/10★★★☆☆Visit DiceDB -
Best forAdministrators needing a visual Redis workbench
A free Redis workbench combining visual data management, CLI tools, profiling, and analysis.
6.5/10★★★☆☆Visit Redis Insight -
Best forPlatform teams managing applications and data services
A broad application platform with managed Valkey, not a standalone in-memory database.
6.2/10★★★☆☆Contact VMware -
Best forErlang developers debugging distributed programs
A focused, free debugger for inspecting Erlang code, processes, and remote nodes.
5.8/10★★★☆☆Try Erlang Debugger
No tools match those filters.
Compare at a glance
| # | Tool | Free plan | Paid from | High availability | Score |
|---|---|---|---|---|---|
| 1 | Couchbase Server | Yes | 9.4 | ||
| 2 | Apache Ignite | Free | 9.2 | ||
| 3 | Infinispan | Yes | Free | 9.0 | |
| 4 | Aerospike Database | Yes | 8.8 | ||
| 5 | Valkey | Free | 8.7 | ||
| 6 | Tarantool DB | 8.6 | |||
| 7 | eXtremeDB | Yes | 8.5 | ||
| 8 | RonDB | Free | Yes | 8.4 | |
| 9 | Apache Geode | Yes | Free | Yes | 8.3 |
| 10 | VoltDB | No | Yes | 8.2 | |
| 11 | Amazon MemoryDB | No | $0.20/GB usage-based | 8.0 | |
| 12 | SingleStore Helios | Yes | $0.99 usage-based | Yes | 7.9 |
| 13 | ALTIBASE | No | Yes | 7.8 | |
| 14 | SAP HANA Cloud | Yes | Yes | 7.7 | |
| 15 | GridGain | No | Yes | 7.6 | |
| 16 | RaimaDB | No | Yes | 7.5 | |
| 17 | Dragonfly | No | $36/mo | Yes | 7.4 |
| 18 | KeyDB | Yes | Free | Yes | 7.3 |
| 19 | ScaleOut In-Memory Database | No | Yes | 7.2 | |
| 20 | Amazon ElastiCache | No | $6/mo | Yes | 7.0 |
| 21 | DiceDB | Yes | Free | 6.8 | |
| 22 | Redis Insight | Yes | Free | 6.5 | |
| 23 | VMware Tanzu Platform | 6.2 | |||
| 24 | Erlang Debugger | Free | 5.8 |
Head-to-head All 27 comparisons →
- Couchbase Server vs Apache Ignite
- Couchbase Server vs Infinispan
- Couchbase Server vs Aerospike Database
- Couchbase Server vs Valkey
- Couchbase Server vs Tarantool DB
- Couchbase Server vs eXtremeDB
- Couchbase Server vs RonDB
- Apache Ignite vs Infinispan
- Apache Ignite vs Aerospike Database
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How we rank In-Memory databases
Every tool on this page was researched by iTechGuides Editors from its official website — pricing pages, plan tables and product documentation. We rank on how well each one does this category's core job, what the free or entry plan includes, and where it falls short. Where we have enough verified facts, the score out of 10 is a rubric — job fit, value and how much we could verify — shown with its breakdown on every tool's page; a tool we have not verified enough to score yet shows its rank without a number. Scores are re-checked when a product changes its plans. Read the full editorial policy, or submit a tool we missed.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update