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DBMS > DuckDB vs. LokiJS vs. TerminusDB vs. VelocityDB

System Properties Comparison DuckDB vs. LokiJS vs. TerminusDB vs. VelocityDB

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Editorial information provided by DB-Engines
NameDuckDB  Xexclude from comparisonLokiJS  Xexclude from comparisonTerminusDB infoformer name was DataChemist  Xexclude from comparisonVelocityDB  Xexclude from comparison
DescriptionAn embeddable, in-process, column-oriented SQL OLAP RDBMSIn-memory JavaScript DBMSScalable Graph Database platform making enterprise data available by exploiting inferred entities and relationshipsA .NET Object Database that can be embedded/distributed and extended to a graph data model (VelocityGraph)
Primary database modelRelational DBMSDocument storeGraph DBMSGraph DBMS
Object oriented DBMS
Secondary database modelsDocument store
RDF store
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score4.63
Rank#69  Overall
#37  Relational DBMS
Score0.49
Rank#260  Overall
#42  Document stores
Score0.23
Rank#316  Overall
#27  Graph DBMS
Score0.11
Rank#354  Overall
#37  Graph DBMS
#16  Object oriented DBMS
Websiteduckdb.orggithub.com/­techfort/­LokiJSterminusdb.comvelocitydb.com
Technical documentationduckdb.org/­docstechfort.github.io/­LokiJSterminusdb.github.io/­terminusdb/­#velocitydb.com/­UserGuide
DeveloperDataChemist Ltd.VelocityDB Inc
Initial release2018201420182011
Current release1.0.0, June 202411.0.0, January 20237.x
License infoCommercial or Open SourceOpen Source infoMIT LicenseOpen SourceOpen Source infoGPL V3commercial
Cloud-based only infoOnly available as a cloud servicenononono
DBaaS offerings (sponsored links) infoDatabase as a Service

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Implementation languageC++JavaScriptProlog, RustC#
Server operating systemsserver-lessserver-less, requires a JavaScript environment (browser, Node.js)LinuxAny that supports .NET
Data schemeyesschema-freeyesyes
Typing infopredefined data types such as float or dateyesnoyesyes
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.nononono
Secondary indexesyesyes infovia viewsyes
SQL infoSupport of SQLyesnoSQL-like query language (WOQL)no
APIs and other access methodsArrow Database Connectivity (ADBC)
CLI Client
JDBC
ODBC
JavaScript APIOWL
RESTful HTTP API
WOQL (Web Object Query Language)
.Net
Supported programming languagesC
C# info3rd party driver
C++
Crystal info3rd party driver
Go info3rd party driver
Java
Lisp info3rd party driver
Python
R
Ruby info3rd party driver
Rust
Swift
Zig info3rd party driver
JavaScriptJavaScript
Python
.Net
Server-side scripts infoStored proceduresnoView functions in JavaScriptyesno
TriggersnoyesyesCallbacks are triggered when data changes
Partitioning methods infoMethods for storing different data on different nodesnonenoneGraph PartitioningSharding
Replication methods infoMethods for redundantly storing data on multiple nodesnonenoneJournaling Streams
MapReduce infoOffers an API for user-defined Map/Reduce methodsnoyesnono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencynoneImmediate Consistency
Foreign keys infoReferential integritynonoyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of dataACIDno infoatomic operations within a single collection possibleACIDACID
Concurrency infoSupport for concurrent manipulation of datayes, multi-version concurrency control (MVCC)yesyes
Durability infoSupport for making data persistentyesyes infoSerialization of a DB in a Node.JS/Cordova/PhoneGap environment. Usage of the IndexedDB-API in a browser.yes infoin-memory journalingyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yesyesyes
User concepts infoAccess controlnonoRole-based access controlBased on Windows Authentication

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More resources
DuckDBLokiJSTerminusDB infoformer name was DataChemistVelocityDB
DB-Engines blog posts

New kids on the block: database management systems implemented in JavaScript
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Recent citations in the news

MotherDuck Announces General Availability; Brings Simplicity and Power of DuckDB in a Serverless Data Warehouse
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DuckDB: The tiny but powerful analytics database
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DuckDB promises greater stability with 1.0 release
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Trinity College spinout TerminusDB secures €3.6m in investment
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