Apache Accumulo

Linux · Self-hosted · API

Freedom report

Two barsScore 6.3

Free tierA free tier is on its own pricing page
Open codeNo open-source code on record
Runs widely1 of 6 device platforms
DocumentedPlans, terms and facts published

Apache Accumulo is ranked #12 of 32 in key-value databases on Freedom251. It runs on API, Linux, Self-hosted. There is a free plan.

Apache Accumulo plans and pricing

All plans

Apache Accumulo Free Open-source sorted, distributed key/value store · Apache License 2.0 accumulo.apache.org · 4 Oct 2026

Compared on key-value databases

Deployment model: self_hosted
Persistence modes: both
Clustering support: Yes
Multi-region support: Yes
Supported protocols: Java API, Thrift

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The record

Purpose: Apache Accumulo is a sorted, distributed key/value store for robust, scalable data storage and retrieval.
Large datasets: Users can store and manage large data sets across a cluster.
Storage and coordination: Accumulo uses Apache Hadoop HDFS to store its data and Apache ZooKeeper for consensus.
Server-side programming: Accumulo Iterators can modify key/value pairs at various points in the data management process.
Access control: Each key/value pair has its own security label, which limits query results based on user authorizations.
Scalability: Accumulo runs on a cluster using one or more HDFS instances, and nodes can be added or removed as stored data changes.
API stability: The project says its client API follows Long Term Maintenance releases and semantic versioning, and each release undergoes extensive testing.
License: The Apache Accumulo site identifies the software as licensed under Apache License, Version 2.0.
Release options: The downloads page lists source and binary archives for Accumulo 4.0.0-alpha-1, 3.0.0, and 2.1.6.
Release maturity: The site labels 4.0.0-alpha-1 an alpha release and says alpha or beta releases are not production ready.
Security reporting: The project asks that potential security issues be reported privately by email and says it follows the ASF vulnerability handling process.
Community support: The project provides a user mailing list for general questions and help, and a dev list for contributor discussions.
Hands-on learning: The interactive tour introduces the Accumulo Java API through independent steps and exercises and is designed for Accumulo 2.1.x or greater.
Maintainer: Apache Accumulo is an Apache Software Foundation project; the foundation describes itself as a U.S. 501(c)(3) nonprofit founded in 1999.
Price from: Free

Where it ranks on Freedom251

Best Key-Value Databases in 2026#12 of 32
Best Wide-Column Databases in 2026#6 of 17

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Sources

accumulo.apache.org· checked 4 Oct 2026
accumulo.apache.org/downloads/· checked 4 Oct 2026
accumulo.apache.org/contact-us/· checked 4 Oct 2026
accumulo.apache.org/tour/· checked 4 Oct 2026
apache.org/foundation/· checked 4 Oct 2026