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DBMS > Immudb vs. QuestDB vs. XTDB

System Properties Comparison Immudb vs. QuestDB vs. XTDB

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Editorial information provided by DB-Engines
NameImmudb  Xexclude from comparisonQuestDB  Xexclude from comparisonXTDB infoformerly named Crux  Xexclude from comparison
DescriptionAn open source immutable (append-only) database with cryptographic verification which makes it tamper-resistant and fully auditable.A high performance open source SQL database for time series dataA general purpose database with bitemporal SQL and Datalog and graph queries
Primary database modelKey-value storeTime Series DBMSDocument store
Secondary database modelsRelational DBMSRelational DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score0.25
Rank#292  Overall
#42  Key-value stores
Score3.12
Rank#81  Overall
#6  Time Series DBMS
Score0.20
Rank#307  Overall
#46  Document stores
Websitegithub.com/­codenotary/­immudb
immudb.io
questdb.iogithub.com/­xtdb/­xtdb
www.xtdb.com
Technical documentationdocs.immudb.ioquestdb.io/­docswww.xtdb.com/­docs
DeveloperCodenotaryQuestDB Technology IncJuxt Ltd.
Initial release202020142019
Current release1.2.3, April 20221.19, September 2021
License infoCommercial or Open SourceOpen Source infoApache Version 2.0Open Source infoApache 2.0Open Source infoMIT License
Cloud-based only infoOnly available as a cloud servicenonono
DBaaS offerings (sponsored links) infoDatabase as a Service

Providers of DBaaS offerings, please contact us to be listed.
Implementation languageGoJava (Zero-GC), C++, RustClojure
Server operating systemsBSD
Linux
macOS
Solaris
Windows
z/OS
Linux
macOS
Windows
All OS with a Java 8 (and higher) VM
Linux
Data schemeschema-freeyes infoschema-free via InfluxDB Line Protocolschema-free
Typing infopredefined data types such as float or dateyesyes, extensible-data-notation format
XML support infoSome form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.nonono
Secondary indexesyesnoyes
SQL infoSupport of SQLSQL-like syntaxSQL with time-series extensionslimited SQL, making use of Apache Calcite
APIs and other access methodsgRPC protocol
PostgreSQL wire protocol
HTTP REST
InfluxDB Line Protocol (TCP/UDP)
JDBC
PostgreSQL wire protocol
HTTP REST
JDBC
Supported programming languages.Net
Go
Java
JavaScript (Node.js)
Python
C infoPostgreSQL driver
C++
Go
Java
JavaScript (Node.js)
Python
Rust infoover HTTP
Clojure
Java
Server-side scripts infoStored proceduresnonono
Triggersnonono
Partitioning methods infoMethods for storing different data on different nodesShardinghorizontal partitioning (by timestamps)none
Replication methods infoMethods for redundantly storing data on multiple nodesSource-replica replication with eventual consistencyyes, each node contains all data
MapReduce infoOffers an API for user-defined Map/Reduce methodsnonono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate Consistency
Foreign keys infoReferential integritynonono
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDACID for single-table writesACID
Concurrency infoSupport for concurrent manipulation of datayesyesyes
Durability infoSupport for making data persistentyesyesyes, flexibel persistency by using storage technologies like Apache Kafka, RocksDB or LMDB
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.noyes infothrough memory mapped files

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More resources
ImmudbQuestDBXTDB infoformerly named Crux
Recent citations in the news

immudb Gains Market Momentum as the Leading Immutable Database for Secure and Tamper-Proof Data Storage
11 March 2025, Business Wire

A Step by Step Guide to immudb — the open source immutable database
18 May 2020, HackerNoon

Immudb: Open-source database, built on a zero trust model
17 December 2021, Help Net Security

Codenotary brings its immutable database to the cloud
21 June 2023, TechCrunch

The Alpha and Omega of software supply chain security
4 February 2022, ZDNET

provided by Google News

High Performance Time - Series Database Design with QuestDB
9 January 2025, infoq.com

QuestDB is a strong choice for time series in 2025
18 April 2025, Amazon Web Services (AWS)

QuestDB Powers B3 Exchange’s Next-Generation CSD Platform’s Tick Data Store
2 April 2025, TradingView

Making a trading Gameboy: A pocket exchange and algo trading platform @QuestDb
12 November 2024, Adafruit Industries – Makers, hackers, artists, designers and engineers!

Competent time-series database with great community
17 April 2025, Amazon Web Services (AWS)

provided by Google News



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