Oracle Database leads for large enterprises requiring advanced features and support. PostgreSQL suits organisations prioritising open-source solutions and cost efficiency. MySQL appeals to web developers and startups seeking simplicity and speed. SQL Server excels for Windows-integrated environments with business intelligence needs.
RANKENTRYSCORETRENDFROM
1Oracle DatabaseDominates enterprise market with over 40% share and supports petabyte-scale databases95.0NEWCustom 2Microsoft SQL ServerPowers over 3 million databases globally with native integration to Azure and Office 36592.7NEW£3,717 per core per year 3PostgreSQLSelected as one of the most reliable databases with a proven 25-year track record of stability90.3NEWFree (open-source) 4MySQLPowers approximately 76% of all websites with a known server-side database technology88.0NEWFree (open-source) 5MongoDBSupports sharding across clusters enabling linear scalability for billions of documents85.7NEWFree (Community); $57 per month (Atlas Cloud) 6Amazon DynamoDBProcesses trillions of requests daily and powers many of the world's largest internet applications83.3NEW$1.25 per million read requests 7ElasticsearchProcesses hundreds of petabytes of data daily across the world's largest organisations81.0NEWFree (open-source); Elastic Cloud from $19 per month 8CassandraPowers some of the world's largest deployments storing petabytes of data with millions of operations per second78.7NEWFree (open-source) 9RedisProvides sub-millisecond latency enabling hundreds of thousands of operations per second76.3NEWFree (open-source); Redis Cloud from $15 per month 10Google Cloud FirestoreAutomatically syncs data across devices in real-time with ACID transaction support74.0NEW$0.06 per 100,000 reads The ranking, in detail
01
Enterprise-grade relational database with comprehensive features
Oracle Database is the industry-leading relational database management system trusted by Fortune 500 companies worldwide. It delivers exceptional performance, scalability, and security across on-premises and cloud environments.
From CustomBest for Large enterprises requiring advanced security, high availability, and comprehensive support
95.0
02
Integrated relational database with powerful business intelligence
SQL Server combines relational database capabilities with integrated analytics and business intelligence tools. It seamlessly integrates with the Microsoft ecosystem and offers excellent performance on Windows infrastructure.
From £3,717 per core per yearBest for Windows-centric enterprises needing integrated BI tools and Microsoft ecosystem alignment
92.7
03
Powerful open-source relational database with advanced features
PostgreSQL is a sophisticated open-source relational database known for reliability, data integrity, and advanced SQL compliance. It supports complex queries, full-text search, and JSON data types, making it versatile for modern applications.
From Free (open-source)Best for Organisations prioritising cost efficiency, flexibility, and advanced SQL capabilities without vendor lock-in
90.3
04
Fast, reliable open-source relational database for web applications
MySQL is the world's most popular open-source relational database, powering millions of web applications and content management systems. It offers simplicity, speed, and ease of deployment across all platforms.
From Free (open-source)Best for Web developers, startups, and organisations building scalable web applications with limited budgets
88.0
05
Leading NoSQL document database for flexible data models
MongoDB is a popular NoSQL document database that stores data in flexible JSON-like documents. It enables rapid development, horizontal scalability, and is particularly suited to applications with evolving data schemas.
From Free (Community); $57 per month (Atlas Cloud)Best for Developers building applications requiring flexible schemas and horizontal scalability across distributed systems
85.7
06
Fully managed NoSQL database service with serverless scalability
DynamoDB is Amazon's fully managed NoSQL database service offering single-digit millisecond performance at scale. It automatically scales to handle any workload and requires no database administration.
From $1.25 per million read requestsBest for Cloud-first organisations using AWS seeking managed database solutions with predictable pay-per-request pricing
83.3
07
Distributed search and analytics engine for big data insights
Elasticsearch is a distributed search and analytics engine built on top of Apache Lucene. It excels at full-text search, log analysis, and real-time analytics at petabyte scale.
From Free (open-source); Elastic Cloud from $19 per monthBest for Organisations requiring advanced search capabilities, log analytics, and real-time data insights
81.0
08
Highly scalable distributed database for massive data volumes
Apache Cassandra is a distributed NoSQL database designed for extreme scalability and high availability. It handles massive datasets across many commodity servers with no single point of failure.
From Free (open-source)Best for Large-scale organisations handling massive data volumes requiring high availability and linear scalability
78.7
09
In-memory data store for ultra-fast caching and session management
Redis is an in-memory data structure store used as a cache, message broker, and real-time analytics platform. It delivers microsecond latency and supports various data structures beyond simple key-value storage.
From Free (open-source); Redis Cloud from $15 per monthBest for Applications requiring ultra-fast caching, session storage, real-time analytics, and message queuing
76.3
10
Fully managed NoSQL document database with real-time synchronisation
Firestore is Google Cloud's fully managed NoSQL document database with real-time synchronisation capabilities. It integrates seamlessly with Google Cloud services and offers automatic scaling with per-document level security.
From $0.06 per 100,000 readsBest for Mobile and web developers using Google Cloud seeking fully managed document databases with real-time updates
74.0
Frequently asked questions
Which database is best for starting a new web application?
MySQL or PostgreSQL are excellent choices for new web applications. MySQL excels at simplicity and rapid deployment, whilst PostgreSQL provides more advanced features and better data integrity. Both are free, open-source, and widely supported by hosting providers.
What is the difference between relational and NoSQL databases?
Relational databases (SQL) organise data in structured tables with predefined schemas and ACID compliance, ideal for transactional consistency. NoSQL databases (MongoDB, Cassandra) use flexible document or key-value structures, prioritising scalability and performance for unstructured or rapidly evolving data.
How much does enterprise database software typically cost?
Oracle Database and SQL Server require licensing fees ranging from thousands to millions annually depending on deployment scale. Open-source alternatives like PostgreSQL and MySQL are free. Cloud options such as DynamoDB and Firestore charge per usage, typically ranging from £15 to several thousand pounds monthly based on workload.