List of the Top 23 Free Relational Database in 2025

KS DB Merge Tools serves as an intuitive diff and merge solution for various databases, including MySQL, MariaDB, Oracle Database, SQL Server, PostgreSQL, MS Access, and SQLite, enabling users to effectively compare and synchronize both schema and data. Initially, it presents a summary of schema modifications, which can then be refined to display lists of specific object types, such as table definitions and views, ultimately allowing users to drill down to the details of individual objects. Additionally, data modifications can be summarized as a comprehensive list indicating the total changes across all tables, with the ability to view side-by-side comparisons of row counts for each table, providing insight into specific column changes for any altered rows. The tool features various filtering options to quickly isolate new, modified, or both new and modified items, whether they pertain to schema objects or table data rows, and allows users to select specific changes to generate scripts for applying these modifications to another database. Furthermore, users have the flexibility to execute these scripts immediately or store them for later application, enhancing their workflow and efficiency. This comprehensive functionality makes KS DB Merge Tools an invaluable resource for database management and synchronization tasks.

Visually analyze and synchronize SQL data by highlighting differences between tables, views, or query results directly on your screen. You can also examine table metadata, create SQL synchronization scripts, and utilize command line features along with internal scheduling to automate both comparison and data synchronization processes. - Supports multiple DBMS through ODBC. - Capable of comparing result sets of any size. - Designed as a native 64-bit application. - Offers multi-threaded and multi-core processing capabilities. - Available as a fully functional trial for 30 days. - Free access is provided for comparing both data and metadata. This tool enhances efficiency in managing database discrepancies and ensures seamless data alignment across systems.

You have the ability to create both flat and relational databases with an unlimited number of fields, tables, and rows, and a custom report generator is provided to facilitate this process. By connecting to compatible ODBC databases, you can craft personalized reports tailored to your needs. Additionally, you have the option to develop your own databases. Here are some key features: - Instantly filter tables for quick data retrieval - User-friendly graphic interface that is incredibly easy to navigate - Create tables and data forms with a single click - Open up to five databases at the same time - Export your data effortlessly to comma-separated files - Generate custom reports for all connected databases - Comprehensive help documentation is available for creating database reports - Print tables and queries directly from the data grid with ease - Compatibility with any SQL standard required by your ODBC-compliant databases To ensure optimal performance and an enhanced user experience, please run this database application with full administrator privileges. System requirements include: - A display resolution of 1024x768 - Compatibility with Windows 98, XP, 8, or 10, available in both 32-bit and 64-bit versions No Java or DotNet installations are necessary, making it a lightweight option for users. This software is designed with green energy in mind, taking steps to contribute positively to the environment while providing powerful database solutions.

Percona Server serves as a fully-compatible and enhanced open-source alternative to MySQL, designed for seamless integration. With its remarkable performance, scalability, and advanced instrumentation, the software has garnered over 5.3 million downloads, demonstrating its widespread acceptance. The support for high-performance hardware ensures that users experience outstanding reliability in their database operations. In addition to these features, Percona Server MySQL provides enterprise-level capabilities, increased uptime, and numerous advantages that significantly boost database performance and operational efficiency. As users find themselves spending less time on tuning and administration tasks, they can redirect their focus toward more critical aspects of their projects and businesses. Recognized as a leader in the market, Percona offers a range of enterprise-class software solutions and support options. Their services encompass consulting, managed solutions, and training for both on-premise and cloud-based open-source databases. Established with a vision that everyone deserves access to scalable, secure, and efficient database solutions without the burdens of vendor lock-in or exorbitant costs, Percona remains committed to empowering its users with the tools and knowledge they need.

Enhance the efficiency of your projects with a customized approach through Airtable. This adaptable collaboration platform combines the strengths of a relational database with the simplicity of a spreadsheet interface. It works seamlessly on multiple devices and platforms, providing real-time data updates to keep everyone on the same page. Users can choose from various visualization options like grid, calendar, Kanban, gallery, and forms, simplifying task management and improving workflow organization. Furthermore, Airtable’s flexible customization features empower users to create specific solutions that cater to a wide array of project requirements, ultimately boosting productivity and collaboration. With its intuitive design, Airtable makes project management not just effective but also enjoyable.

MySQL is recognized as the leading open source database in the world. Its impressive history of reliability, performance, and ease of use has made it the go-to choice for many web applications, including major platforms like Facebook, Twitter, and YouTube, as well as the five most visited websites. Additionally, MySQL is a popular option for embedded database solutions, with many independent software vendors and original equipment manufacturers distributing it. The database's flexibility and powerful capabilities further enhance its popularity across diverse sectors, making it a critical tool for developers and businesses alike. Its continued evolution ensures that it remains relevant in an ever-changing technological landscape.

Microsoft SQL Server 2019 merges cutting-edge intelligence with robust security features, presenting a wealth of additional tools at no extra expense while maintaining exceptional performance and flexibility tailored for on-premises needs. Users can effortlessly migrate to the cloud, fully leveraging its operational efficiency and nimbleness without modifying their existing codebase. By harnessing Azure, organizations can speed up the generation of insights and engage in predictive analytics more effectively. The development process remains versatile, empowering users to select their preferred technologies, including those from the open-source community, all backed by Microsoft's continuous innovations. This platform facilitates straightforward data integration within applications and provides an extensive range of cognitive services designed to nurture human-like intelligence, accommodating any data volume. AI is fundamentally woven into the data platform, enabling faster insight extraction from data stored both on-premises and in the cloud. Combining proprietary enterprise data with global datasets allows organizations to cultivate a culture steeped in intelligence. Moreover, the adaptable data platform ensures a uniform user experience across diverse environments, significantly reducing the time required to launch new innovations; this flexibility enables developers to create and deploy applications in multiple settings, ultimately boosting overall operational productivity and effectiveness. As a result, businesses can respond swiftly to market changes and evolving customer demands.

QuintaDB is an easy-to-use platform designed for creating web forms and databases without the need for programming skills or understanding web frameworks. Users can effortlessly customize forms, charts, and maps that can be integrated into forums, blogs, or websites with just a few clicks. This service simplifies the management of business operations by providing comprehensive control over application workflows, alongside features like email and SMS alerts. Additionally, users can set up conditional actions and formatting, in conjunction with a customer portal that promotes better engagement. Data is securely maintained in an online relational database that features a straightforward interface, removing the necessity for individual server setups. With round-the-clock accessibility, users can access their information from anywhere in the world. Moreover, QuintaDB supports the addition of customizable widgets such as web forms, tables, charts, and maps across different online platforms, allowing for a personalized design that meets specific requirements. This level of adaptability not only improves user experience but also encourages creative solutions across various use cases, making it a versatile tool for many users.

Knack is a user-friendly application creation tool tailored for business owners who do not have a technical background. With its drag-and-drop functionality, individuals can effortlessly design apps for various purposes such as CRM, lead management, membership directories, project oversight, inventory control, order management, or even HIPAA-compliant applications. Current users appreciate the convenience of accessing their apps while on the go, whether on Android or iOS devices. The platform also features collaborative tools, including whiteboards and tagging systems, which enhance teamwork for larger groups with several administrators. Additionally, the automated analytics dashboard provides insights into app usage and user interactions, enabling effective monitoring of performance and engagement. This combination of features makes Knack a versatile solution for businesses looking to streamline their processes.

Discover the advantages of serverless and interactive data querying with IBM Cloud Object Storage, which allows you to analyze data at its origin without the complexities of ETL processes, databases, or infrastructure management. With IBM Cloud SQL Query, powered by Apache Spark, you can perform high-speed, flexible analyses using SQL queries without needing to define ETL workflows or schemas. The intuitive query editor and REST API make it simple to conduct data analysis on your IBM Cloud Object Storage. Operating on a pay-per-query pricing model, you are charged solely for the data scanned, offering an economical approach that supports limitless queries. To maximize both cost savings and performance, you might want to consider compressing or partitioning your data. Additionally, IBM Cloud SQL Query guarantees high availability by executing queries across various computational resources situated in multiple locations. It supports an array of data formats, such as CSV, JSON, and Parquet, while also being compatible with standard ANSI SQL for query execution, thereby providing a flexible tool for data analysis. This functionality empowers organizations to make timely, data-driven decisions, enhancing their operational efficiency and strategic planning. Ultimately, the seamless integration of these features positions IBM Cloud SQL Query as an essential resource for modern data analysis.

ERBuilder Data Modeler is a graphical interface tool that enables developers to create, visualize, and design databases through the use of entity relationship diagrams. It also has the capability to automatically produce the most frequently used SQL databases. Make sure to distribute the data model documentation among your team members. Additionally, you can enhance your data model by utilizing sophisticated features such as schema comparison, schema synchronization, and the generation of test data, ensuring a more efficient workflow. This comprehensive tool helps streamline the database design process significantly.

Firebird is a versatile relational database that adheres to many ANSI SQL standards and offers compatibility across Linux, Windows, and various Unix platforms. Its features include exceptional concurrency, high performance, and strong support for stored procedures and triggers, which contribute to its widespread use in different applications. Since its launch in 1981, Firebird has been employed in various production settings under several different names. The Firebird Project functions autonomously, comprising a team of C and C++ developers, technical advisors, and community supporters who all play a role in the continued enhancement of this multi-platform relational database management system, derived from the source code released by Inprise Corp (now known as Borland Software Corp) on July 25, 2000. In addition, the Firebird Project offers an extensive array of documentation for users, developers, and administrators, including beginner-friendly Quick Start guides and detailed expert articles that delve into various features of the Firebird system. This comprehensive resource guarantees that anyone engaging with Firebird has access to the necessary information to refine their experience and maximize the database's capabilities. As a result, the Firebird community continues to grow, enhancing collaboration and knowledge sharing among its users.

IBM Informix® stands out as a versatile and effective database solution, seamlessly integrating SQL, NoSQL/JSON, time series, and spatial data. Its user-friendly interface and adaptability make it an ideal option for a variety of environments, encompassing large enterprise data warehouses and smaller application development initiatives. The database's compact design and self-managing capabilities make it especially beneficial for applications involving embedded data management. As the need for IoT data processing continues to grow, Informix addresses this demand with its hybrid architecture, which minimizes administrative overhead while maintaining a small memory footprint and providing substantial functionality. It is particularly adept at supporting multi-tiered architectures that require data processing across different levels, including devices, gateways, and cloud infrastructures. Additionally, Informix features native encryption to protect data both at rest and during transmission. Its support for flexible schemas, along with various APIs and configurations, further enhances its versatility, making Informix a fitting solution for contemporary data management challenges. The combination of these attributes positions Informix as a leading contender in the database landscape, capable of meeting the evolving needs of businesses and developers alike.

An enterprise-grade database designed for handling time series, documents, and vectors. It allows for the storage of diverse data types while merging the ease and scalability of NoSQL with the capabilities of SQL. CrateDB stands out as a distributed database that executes queries in mere milliseconds, no matter the complexity, data volume, or speed of incoming data. This makes it an ideal solution for organizations that require rapid and efficient data processing.

TimescaleDB stands out as the leading open-source relational database tailored for managing time-series data, offering both managed and self-hosted options. You can trust the familiar PostgreSQL foundation, enjoying complete SQL support alongside unmatched reliability and a vast ecosystem. With the capability to write millions of data points per node, it allows for horizontal scaling up to petabytes without the hassle of high cardinality concerns. This database minimizes complexity, enabling you to pose more questions and develop more sophisticated applications. By leveraging advanced algorithms, you can achieve impressive compression rates of 94-97%, along with various performance enhancements that lead to significant cost savings. As a modern cloud-native platform, it efficiently handles all aspects of time-series data storage. Built on PostgreSQL and TimescaleDB, it represents the fastest, simplest, and most dependable method for managing your time-series information. Furthermore, all observability data falls under the umbrella of time-series data, highlighting the importance of finding efficient solutions for addressing infrastructure and application challenges. By optimizing data management, businesses can unlock valuable insights and enhance their operational efficiency.

PolarDB is specifically designed for critical database applications that require outstanding speed, high concurrency, and effortless scalability. It supports an impressive capacity of millions of queries each second and can accommodate a database cluster of 100 TB, along with 15 read replicas that maintain low latency. This platform offers performance that outpaces traditional MySQL databases by six times, while also ensuring security, reliability, and availability on par with leading commercial databases, all at a fraction of the cost. The evolution of PolarDB is the result of a decade of honed database technology and best practices, which have proven their worth in high-demand scenarios such as the Alibaba Double 11 Global Shopping Festival. To encourage growth within the developer community, we are excited to announce the launch of Always Free ApsaraDB for PolarDB across all three versions, available for users with a single instance that includes 2 cores and 8GB of memory, plus up to 50GB of storage. Take advantage of this opportunity by registering now and remember to renew each month to maintain this beneficial offer. Additionally, it's important to note that the availability of resources in various regions may fluctuate, so staying updated will be crucial to ensure access to this service as needed. This offering provides an excellent chance for developers to explore advanced database functionalities without incurring costs.

Apache Phoenix effectively merges online transaction processing (OLTP) with operational analytics in the Hadoop ecosystem, making it suitable for applications that require low-latency responses by blending the advantages of both domains. It utilizes standard SQL and JDBC APIs while providing full ACID transaction support, as well as the flexibility of schema-on-read common in NoSQL systems through its use of HBase for storage. Furthermore, Apache Phoenix integrates effortlessly with various components of the Hadoop ecosystem, including Spark, Hive, Pig, Flume, and MapReduce, thereby establishing itself as a robust data platform for both OLTP and operational analytics through the use of widely accepted industry-standard APIs. The framework translates SQL queries into a series of HBase scans, efficiently managing these operations to produce traditional JDBC result sets. By making direct use of the HBase API and implementing coprocessors along with specific filters, Apache Phoenix delivers exceptional performance, often providing results in mere milliseconds for smaller queries and within seconds for extensive datasets that contain millions of rows. This outstanding capability positions it as an optimal solution for applications that necessitate swift data retrieval and thorough analysis, further enhancing its appeal in the field of big data processing. Its ability to handle complex queries with efficiency only adds to its reputation as a top choice for developers seeking to harness the power of Hadoop for both transactional and analytical workloads.

As the shift towards distributed applications and architectures accelerates, it becomes crucial for your database to evolve in response. Experience the versatility of a distributed SQL database that can be deployed anytime and anywhere, customized to fit your unique needs. Upgrade your existing SQL applications to a powerful multi-node framework that can easily scale up or down based on fluctuating demand. Our Transaction Engines (TEs) and Storage Managers (SMs) work in harmony to ensure ACID compliance across diverse nodes. Through the adoption of a distributed architecture, your database gains the ability to endure the failure of one or more nodes while still providing uninterrupted access. You can strategically position TEs and SMs to meet the demands of your workload or across the various environments your teams utilize, including private clouds, public clouds, hybrid configurations, or multiple cloud services. This remarkable flexibility guarantees that your database stays resilient and efficient amid a rapidly changing technological environment. Ultimately, the ability to adapt and thrive in such conditions will give your organization a significant competitive edge.

Utilize Valentina DB, MySQL, MariaDB, PostgreSQL, and SQLite for free to explore, create, and manage databases. Generate detailed business reports using Valentina Studio Pro, either hosted on Valentina Server or within an application leveraging an Application Developer Kit. Implement both backward and forward engineering practices in Valentina Studio Pro, enabling the production of diagrams from existing databases and the seamless integration of new components. Craft SQL queries with enhanced features like auto-completion and syntax highlighting while effortlessly managing favorite queries and accessing recent ones. Take advantage of a function browser that offers a comprehensive dictionary for SQL functions, along with consoles that display errors, warnings, and performance insights. Efficiently search and export records in formats such as CSV, JSON, and Excel, while also modifying the properties of various database objects simultaneously. With remarkable speed, dive into tables and fields, while managing user and group privileges effectively. This comprehensive suite of tools empowers users to streamline database management processes, enhancing both productivity and accuracy. Additionally, the collaborative features encourage teamwork and knowledge sharing among users, making database management an even more integrated experience.

SAP HANA is a cutting-edge in-memory database that efficiently manages both transactional and analytical workloads by utilizing a single data copy, regardless of its nature. It effectively eliminates the divide between transactional and analytical functions within businesses, allowing for quick decision-making whether used in a traditional data center or through cloud services. This advanced database management system grants users the ability to develop intelligent, real-time applications, which promotes fast decision-making from a consolidated data repository. By integrating sophisticated analytics, it bolsters the performance of modern transaction processing systems. Organizations can leverage cloud-native features such as enhanced scalability, speed, and performance to create comprehensive data solutions. With SAP HANA Cloud, businesses gain access to dependable and actionable insights from a unified platform while maintaining stringent security, privacy, and data anonymization that align with established enterprise standards. In the rapidly evolving market landscape, the intelligent enterprise increasingly depends on prompt insights generated from data, highlighting the necessity for real-time access to critical information. As organizations face rising expectations for immediate insights, adopting a powerful database solution like SAP HANA is essential for maintaining a competitive edge. The ability to make informed decisions based on real-time data is becoming a key differentiator in business success.

Volt Active Data is an advanced data platform crafted to optimize your technology infrastructure, boosting both speed and cost-efficiency while allowing applications and enterprises to scale seamlessly to meet the stringent low latency service level agreements (SLAs) essential for 5G, IoT, edge computing, and forthcoming innovations. It is specifically designed to enhance your existing big data resources, such as NoSQL, Hadoop, Kubernetes, Kafka, and traditional databases or data warehouses, by eliminating the typically complex layers required for contextual decision-making on streaming data, instead providing a unified layer that enables ingestion to action in less than 10 milliseconds. In today's digital world, data is plentiful, often generated, stored, and subsequently ignored or discarded. The term "Active Data" pertains to the information that necessitates prompt action for businesses to extract meaningful value from it. While there are various traditional and NoSQL data storage solutions available for handling such data, a unique segment of data can be monetized if swift action is taken to 'influence the moment' before the opportunity is lost. By utilizing Volt Active Data's capabilities, organizations can transform their approach from merely gathering data to actively employing it for real-time decision-making and gaining a competitive edge. This shift not only enhances operational efficiency but also enables companies to seize opportunities in an increasingly fast-paced market.

Apache Druid stands out as a robust open-source distributed data storage system that harmonizes elements from data warehousing, timeseries databases, and search technologies to facilitate superior performance in real-time analytics across diverse applications. The system's ingenious design incorporates critical attributes from these three domains, which is prominently reflected in its ingestion processes, storage methodologies, query execution, and overall architectural framework. By isolating and compressing individual columns, Druid adeptly retrieves only the data necessary for specific queries, which significantly enhances the speed of scanning, sorting, and grouping tasks. Moreover, the implementation of inverted indexes for string data considerably boosts the efficiency of search and filter operations. With readily available connectors for platforms such as Apache Kafka, HDFS, and AWS S3, Druid integrates effortlessly into existing data management workflows. Its intelligent partitioning approach markedly improves the speed of time-based queries when juxtaposed with traditional databases, yielding exceptional performance outcomes. Users benefit from the flexibility to easily scale their systems by adding or removing servers, as Druid autonomously manages the process of data rebalancing. In addition, its fault-tolerant architecture guarantees that the system can proficiently handle server failures, thus preserving operational stability. This resilience and adaptability make Druid a highly appealing option for organizations in search of dependable and efficient analytics solutions, ultimately driving better decision-making and insights.

This is a robust, easily scalable embedded SQL database that allows access from any location. Additionally, it offers top-tier data protection, disaster recovery solutions, synchronization of changes, and comprehensive data security measures.