vs

Aerospike vs Couchbase Server

Aerospike: Flash-optimized distributed key-value and document database for predictable sub-millisecond latency at scale. Couchbase Server: Memory-first distributed JSON database with SQL++, search, vector indexes and mobile sync.

key differences

  • Aerospike is primarily a key-value database; Couchbase Server is document.
  • Licensing: Aerospike is open source (copyleft) (AGPL-3.0 (Community Edition); commercial Enterprise Edition); Couchbase Server is source-available (Business Source License 1.1 (source); commercial Enterprise Edition).
  • Aerospike is built for larger datasets (Multi-PB) than Couchbase Server (≤ 1 PB).
  • Only Aerospike has stored procedures.
  • Only Couchbase Server has joins, full-text search, vector search, triggers, offline sync.

choose aerospike for

  • +Real-time bidding and ad-tech user profiles
  • +Fraud detection and payment authorization
  • +Online ML feature stores
  • +Telecom subscriber and session data

best at · OLTP, Cache, Sessions

choose couchbase for

  • +User profiles and session stores at high concurrency
  • +Travel, retail and gaming backends with strict latency SLAs
  • +Offline-first mobile and edge apps with Couchbase Lite
  • +Caching layer that also persists and can be queried

best at · OLTP, Cache, Sessions

overview
Primary model
Key-Value
Document
Also supports
Document, Spatial
Key-Value, Search Engine, Vector, Spatial
Type
Database engine
Database engine
Status
Active
Active
Developer
Aerospike, Inc.
Couchbase, Inc.
First release
2010
2010
Latest version
8.2.0 (Sep 29, 2026)
8.0.3 (Sep 2026)
License
Open source (copyleft)AGPL-3.0 (Community Edition); commercial Enterprise Edition
Source-availableBusiness Source License 1.1 (source); commercial Enterprise Edition
Free tier
✓
✓
popularity
WhichDB Score
40.4
27.5
Rank
#42
#101
GitHub stars
1.4K
–
Stack Overflow questions
842
4.1K
scale & guarantees
Comfortable data size
Massive (Multi-PB)
Large (≤ 1 PB)
Horizontal scaling
Native
Native
Multi-region
Active active
Active active
ACID
Full
Full
Consistency
Tunable, Strong, Eventual
Strong, Eventual
Schema
Schemaless
Flexible
Architecture
Distributed, In memory, Client server
Distributed, Multi primary, In memory
deployment
Self-hosted
✓
✓
Vendor-managed cloud
✓
✓
Serverless
—
—
Embedded
—
—
Edge
—
—
Clouds
AWS, Google Cloud, Azure
AWS, Google Cloud, Azure
capabilities
Transactions
✓
✓
Joins
—
✓
Secondary indexes
✓
✓
Full-text search
—
✓
Vector search
—
✓
Geospatial
✓
✓
JSON
✓
✓
Change data capture
✓
✓
Triggers
—
✓
Stored procedures
✓
—
Materialized views
—
—
TTL / expiry
✓
✓
Pub/Sub
—
—
Columnar storage
—
—
In-memory
✓
✓
Durable persistence
✓
✓
Compression
✓
✓
Encryption at rest
✓
✓
Role-based access
✓
✓
Time travel
—
—
Branching
—
—
Online schema changes
✓
✓
Streaming ingest
—
—
Offline sync
—
✓
Runs in WebAssembly
—
—
interfaces
Query languages
Aerospike Expressions, AQL (CLI)
SQL++ (N1QL), Full Text Search query DSL
Client languages
C, C#, Go, Java, JavaScript, Python, Rust
C, C#, Go, Java, Kotlin, JavaScript, PHP, Python
Best for
OLTP, Cache, Sessions, Feature store
OLTP, Cache, Sessions, Search

Aerospike vs Couchbase Server: FAQ

What is the difference between Aerospike and Couchbase Server?

Aerospike: Flash-optimized distributed key-value and document database for predictable sub-millisecond latency at scale. Couchbase Server: Memory-first distributed JSON database with SQL++, search, vector indexes and mobile sync. Aerospike is primarily a key-value database; Couchbase Server is document. Licensing: Aerospike is open source (copyleft) (AGPL-3.0 (Community Edition); commercial Enterprise Edition); Couchbase Server is source-available (Business Source License 1.1 (source); commercial Enterprise Edition). Aerospike is built for larger datasets (Multi-PB) than Couchbase Server (≤ 1 PB).

When should I choose Aerospike over Couchbase Server?

Choose Aerospike for real-time bidding and ad-tech user profiles; fraud detection and payment authorization; and online ML feature stores. Choose Couchbase Server for user profiles and session stores at high concurrency; travel, retail and gaming backends with strict latency SLAs; and offline-first mobile and edge apps with Couchbase Lite.

Is Aerospike or Couchbase Server more popular?

Aerospike ranks #42 on the WhichDB Score (40.4/100) and Couchbase Server ranks #101 (27.5/100). Popularity is not fit: check the requirements that matter for your project.

Are Aerospike and Couchbase Server open source?

Yes. Aerospike is open source. License: AGPL-3.0 (Community Edition); commercial Enterprise Edition. Not in the OSI sense. Couchbase Server is source-available: you can read the code, but the license restricts some uses, typically offering it as a competing managed service. License: Business Source License 1.1 (source); commercial Enterprise Edition.