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Apache Accumulo vs Apache Cassandra

Apache Accumulo: Sorted, distributed key-value store on HDFS with cell-level security labels. Apache Cassandra: Masterless wide-column database built for always-on writes across data centers.

key differences

  • Only Apache Accumulo has stored procedures, time travel.
  • Only Apache Cassandra has secondary indexes, vector search, json, change data capture, triggers.

choose apache-accumulo for

  • +Multi-level-security data platforms in government
  • +Large graph and index storage with custom iterators
  • +Secure data lakes needing per-cell authorization

best at · OLTP, Metadata, Graph analytics

choose apache-cassandra for

  • +Write-heavy event and telemetry ingestion
  • +Messaging and activity feeds
  • +Multi-region user and device data
  • +Time-series with TTL-based expiry

best at · OLTP, Time-series, IoT

Apache AccumuloSorted, distributed key-value store on HDFS with cell-level security labels.
Apache CassandraMasterless wide-column database built for always-on writes across data centers.
overview
Primary model
Wide-Column
Wide-Column
Also supports
Key-Value
Key-Value, Vector
Type
Database engine
Database engine
Status
Active
Active
Developer
Apache Software Foundation
Apache Software Foundation
First release
2008
2008
Latest version
2.1.6 (Jul 13, 2026)
5.0.9 (Jul 2026)
License
Open source (permissive)Apache License 2.0
Open source (permissive)Apache License 2.0
Free tier
✓
✓
popularity
WhichDB Score
15.3
55.9
Rank
#218
#20
GitHub stars
1.2K
10.1K
Stack Overflow questions
267
20.9K
scale & guarantees
Comfortable data size
Massive (Multi-PB)
Massive (Multi-PB)
Horizontal scaling
Native
Native
Multi-region
Read replicas
Active active
ACID
Limited
Limited
Consistency
Strong
Tunable, Eventual
Schema
Schemaless
Strict
Architecture
Distributed, Shared storage, Client server
Distributed, Multi primary, Client server
deployment
Self-hosted
✓
✓
Vendor-managed cloud
—
—
Serverless
—
—
Embedded
—
—
Edge
—
—
Clouds
–
AWS, Google Cloud, Azure, IBM Cloud
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
Accumulo Java API
CQL
Client languages
Java, Python
Java, Python, JavaScript, Go, C#, C++, Rust, Ruby
Best for
OLTP, Metadata, Graph analytics
OLTP, Time-series, IoT, Observability
Add more to this comparisonNot sure either fits? Try smart match

Apache Accumulo vs Apache Cassandra: FAQ

What is the difference between Apache Accumulo and Apache Cassandra?

Apache Accumulo: Sorted, distributed key-value store on HDFS with cell-level security labels. Apache Cassandra: Masterless wide-column database built for always-on writes across data centers. Only Apache Accumulo has stored procedures, time travel. Only Apache Cassandra has secondary indexes, vector search, json, change data capture, triggers.

When should I choose Apache Accumulo over Apache Cassandra?

Choose Apache Accumulo for multi-level-security data platforms in government; large graph and index storage with custom iterators; and secure data lakes needing per-cell authorization. Choose Apache Cassandra for write-heavy event and telemetry ingestion; messaging and activity feeds; and multi-region user and device data.

Is Apache Accumulo or Apache Cassandra more popular?

Apache Cassandra ranks #20 on the WhichDB Score (55.9/100) and Apache Accumulo ranks #218 (15.3/100). Popularity is not fit: check the requirements that matter for your project.

Are Apache Accumulo and Apache Cassandra open source?

Yes. Apache Accumulo is open source. License: Apache License 2.0. Yes. Apache Cassandra is open source. License: Apache License 2.0.