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DBMS > Coveo vs. DolphinDB vs. Firebase Realtime Database vs. H2 vs. Immudb

System Properties Comparison Coveo vs. DolphinDB vs. Firebase Realtime Database vs. H2 vs. Immudb

Editorial information provided by DB-Engines
NameCoveo  Xexclude from comparisonDolphinDB  Xexclude from comparisonFirebase Realtime Database  Xexclude from comparisonH2  Xexclude from comparisonImmudb  Xexclude from comparison
DescriptionAI-powered hosted search, recommendation and personalization platform providing tools for both low-code and full-code developmentDolphinDB is a high performance Time Series DBMS. It is integrated with an easy-to-use fully featured programming language and a high-volume high-velocity streaming analytics system. It offers operational simplicity, scalability, fault tolerance, and concurrency.Cloud-hosted realtime document store. iOS, Android, and JavaScript clients share one Realtime Database instance and automatically receive updates with the newest data.Full-featured RDBMS with a small footprint, either embedded into a Java application or used as a database server.An open source immutable (append-only) database with cryptographic verification which makes it tamper-resistant and fully auditable.
Primary database modelSearch engineTime Series DBMSDocument storeRelational DBMSKey-value store
Secondary database modelsRelational DBMSSpatial DBMSRelational DBMS
DB-Engines Ranking infomeasures the popularity of database management systemsranking trend
Trend Chart
Score2.28
Rank#114  Overall
#11  Search engines
Score4.13
Rank#80  Overall
#6  Time Series DBMS
Score14.29
Rank#39  Overall
#6  Document stores
Score8.13
Rank#49  Overall
#31  Relational DBMS
Score0.24
Rank#305  Overall
#43  Key-value stores
Websitewww.coveo.comwww.dolphindb.comfirebase.google.com/­products/­realtime-databasewww.h2database.comgithub.com/­codenotary/­immudb
immudb.io
Technical documentationdocs.coveo.comdocs.dolphindb.cn/­en/­help200/­index.htmlfirebase.google.com/­docs/­databasewww.h2database.com/­html/­main.htmldocs.immudb.io
DeveloperCoveoDolphinDB, IncGoogle infoacquired by Google 2014Thomas MuellerCodenotary
Initial release20122018201220052020
Current releasev2.00.4, January 20222.2.220, July 20231.2.3, April 2022
License infoCommercial or Open Sourcecommercialcommercial infofree community version availablecommercialOpen Source infodual-licence (Mozilla public license, Eclipse public license)Open Source infoApache Version 2.0
Cloud-based only infoOnly available as a cloud serviceyesnoyesnono
DBaaS offerings (sponsored links) infoDatabase as a Service

Providers of DBaaS offerings, please contact us to be listed.
Implementation languageC++JavaGo
Server operating systemshostedLinux
Windows
hostedAll OS with a Java VMBSD
Linux
macOS
Solaris
Windows
z/OS
Data schemehybrid - fields need to be configured prior to indexing, but relationships can be exploited at query time without pre-configurationyesschema-freeyesschema-free
Typing infopredefined data types such as float or dateyesyesyesyes
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.nonononono
Secondary indexesyesyesyesyesyes
SQL infoSupport of SQLnoSQL-like query languagenoyesSQL-like syntax
APIs and other access methodsRESTful HTTP APIJDBC
JSON over HTTP
Kafka
MQTT (Message Queue Telemetry Transport)
ODBC
OPC DA
OPC UA
RabbitMQ
WebSocket
Android
iOS
JavaScript API
RESTful HTTP API
JDBC
ODBC
gRPC protocol
PostgreSQL wire protocol
Supported programming languagesC#
Java
JavaScript
Python
C#
C++
Go
Java
JavaScript
MatLab
Python
R
Rust
Java
JavaScript
Objective-C
Java.Net
Go
Java
JavaScript (Node.js)
Python
Server-side scripts infoStored proceduresnoyeslimited functionality with using 'rules'Java Stored Procedures and User-Defined Functionsno
TriggersyesnoCallbacks are triggered when data changesyesno
Partitioning methods infoMethods for storing different data on different nodesyeshorizontal partitioningnoneSharding
Replication methods infoMethods for redundantly storing data on multiple nodesyesyesWith clustering: 2 database servers on different computers operate on identical copies of a database
MapReduce infoOffers an API for user-defined Map/Reduce methodsnoyesnonono
Consistency concepts infoMethods to ensure consistency in a distributed systemImmediate ConsistencyImmediate ConsistencyEventual Consistency infoif the client is offline
Immediate Consistency infoif the client is online
Immediate ConsistencyImmediate Consistency
Foreign keys infoReferential integrityyesnonoyesno
Transaction concepts infoSupport to ensure data integrity after non-atomic manipulations of datayesyesyesACIDACID
Concurrency infoSupport for concurrent manipulation of datayesyesyesyes, multi-version concurrency control (MVCC)yes
Durability infoSupport for making data persistentyesyesyesyesyes
In-memory capabilities infoIs there an option to define some or all structures to be held in-memory only.yesyesno
User concepts infoAccess controlgranular access controls, API key management, content filtersAdministrators, Users, Groupsyes, based on authentication and database rulesfine grained access rights according to SQL-standard

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More resources
CoveoDolphinDBFirebase Realtime DatabaseH2Immudb
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