DBMS > EventStoreDB vs. FatDB vs. Firebase Realtime Database vs. SAP Advantage Database Server

System Properties Comparison EventStoreDB vs. FatDB vs. Firebase Realtime Database vs. SAP Advantage Database Server

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Editorial information provided by DB-Engines
Name	EventStoreDB  Xexclude from comparison	FatDB  Xexclude from comparison	Firebase Realtime Database  Xexclude from comparison	SAP Advantage Database Server former name: Sybase ADS  Xexclude from comparison
		FatDB/FatCloud has ceased operations as a company with February 2014. FatDB is discontinued and excluded from the ranking.		SAP Advantage Database Server seems to be discontinued. Therefore it is excluded from the DB-Engines Ranking.
Description	Industrial-strength, open-source database solution built from the ground up for event sourcing.	A .NET NoSQL DBMS that can integrate with and extend SQL Server.	Cloud-hosted realtime document store. iOS, Android, and JavaScript clients share one Realtime Database instance and automatically receive updates with the newest data.	Low-cost RDBMS with access to ISAM and FoxPro data structures
Primary database model	Event Store	Document store Key-value store	Document store	Relational DBMS
DB-Engines Ranking measures the popularity of database management systems Trend Chart	Score 1.19 Rank #173   Overall #1   Event Stores		Score 13.64 Rank #39   Overall #6   Document stores
Website	www.eventstore.com		firebase.google.com/­products/­realtime-database	www.sap.com/products/advantage-database-server.html
Technical documentation	developers.eventstore.com		firebase.google.com/­docs/­database
Developer	Event Store Limited	FatCloud	Google acquired by Google 2014	Sybase, SAP
Initial release	2012	2012	2012	1993
Current release	21.2, February 2021
License Commercial or Open Source	Open Source	commercial	commercial	commercial
Cloud-based only Only available as a cloud service	no	no	yes	no
DBaaS offerings (sponsored links) Database as a Service Providers of DBaaS offerings, please contact us to be listed.
Implementation language		C#
Server operating systems	Linux Windows	Windows	hosted	Linux Windows
Data scheme		schema-free	schema-free	yes
Typing predefined data types such as float or date		yes	yes	yes
XML support Some form of processing data in XML format, e.g. support for XML data structures, and/or support for XPath, XQuery or XSLT.			no	no
Secondary indexes		yes	yes	yes
SQL Support of SQL		no Via inetgration in SQL Server	no	yes
APIs and other access methods		.NET Client API LINQ RESTful HTTP API RPC Windows WCF Bindings	Android iOS JavaScript API RESTful HTTP API	.NET Client API ADO.NET JDBC ODBC OLE DB
Supported programming languages		C#	Java JavaScript Objective-C	Delphi Perl PHP
Server-side scripts Stored procedures		yes via applications	limited functionality with using 'rules'	yes
Triggers		yes via applications	Callbacks are triggered when data changes	yes
Partitioning methods Methods for storing different data on different nodes		Sharding		none
Replication methods Methods for redundantly storing data on multiple nodes		selectable replication factor		Multi-source replication CONFLICT Trigger to resolve replication conflicts Source-replica replication
MapReduce Offers an API for user-defined Map/Reduce methods		yes	no	no
Consistency concepts Methods to ensure consistency in a distributed system		Eventual Consistency Immediate Consistency	Eventual Consistency if the client is offline Immediate Consistency if the client is online	Immediate Consistency
Foreign keys Referential integrity		no	no	yes
Transaction concepts Support to ensure data integrity after non-atomic manipulations of data		no	yes	ACID
Concurrency Support for concurrent manipulation of data		yes	yes	yes
Durability Support for making data persistent		yes	yes	yes
In-memory capabilities Is there an option to define some or all structures to be held in-memory only.				no caching of (temporary) tables can be configured
User concepts Access control		no Can implement custom security layer via applications	yes, based on authentication and database rules	fine grained access rights according to SQL-standard
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More resources
	EventStoreDB	FatDB	Firebase Realtime Database	SAP Advantage Database Server former name: Sybase ADS
DB-Engines blog posts			Cloud-based DBMS's popularity grows at high rates 12 December 2019, Paul Andlinger show all
Recent citations in the news			Realtime vs Cloud Firestore: Which Firebase Database to go? 8 March 2024, Appinventiv Atos cybersecurity blog: Misconfigured Firebase: A real-time cyber threat 18 January 2024, Atos Don't be like these 900+ websites and expose millions of passwords via Firebase 18 March 2024, The Register Google launches Firebase Genkit, a new open source framework for building AI-powered apps 14 May 2024, TechCrunch Hundreds of Google Firebase websites might have leaked data online 19 March 2024, TechRadar provided by Google News	SAP Announces Q3 2023 Results: Asia Pacific and Japan View 19 October 2023, SAP News provided by Google News

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