List of the Top 25 Free Data Modeling Tools in 2025

Warehouse-Native Customer Journey Analytics—No Black Boxes. Total Transparency. Kubit is the leading customer journey analytics platform, purpose-built for product, data, and marketing teams that need self-service insights, real-time data visibility, and complete control—without engineering bottlenecks or vendor lock-in. Unlike legacy analytics solutions, Kubit is natively integrated with your cloud data warehouse (Snowflake, BigQuery, Databricks), so you can analyze customer behavior and user journeys directly at the source. No data exports. No hidden models. No black-box limitations. With out-of-the-box capabilities for funnel analysis, retention metrics, user pathing, and cohort analysis, Kubit delivers actionable insights across the full customer lifecycle. Layer in real-time anomaly detection and exploratory analytics to move faster, optimize performance, and drive user engagement. Leading brands like Paramount, TelevisaUnivision, and Miro rely on Kubit for its flexibility, enterprise-grade governance, and best-in-class customer support. See why Kubit is redefining customer journey analytics at kubit.ai

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.

Tatsoft's FactoryStudio equips users with the essential tools to swiftly create robust and secure industrial applications. Its features encompass real-time data modeling and logging, an MQTT client/broker, comprehensive audit trails, alarms and incidents management, a visual SQL query gateway, high-performance smart screens, and HTML5 dashboards, along with WPF drawing tools, an iOS app, trend analysis, annotations, reporting capabilities, and much more! You have the flexibility to write programming scripts using C#, VB.NET, or JavaScript. With a hassle-free setup that requires no client installation and only a minimal two-minute server-side setup, you can get started almost instantly. The platform boasts a wide variety of native protocol drivers for PLCs and DCSs, in addition to compatibility with industry standards such as OPC and MQTT. If you require a specific driver that is not currently available, a toolkit is also provided to assist you in developing custom protocol drivers! FactoryStudio serves as the central data hub for your industrial ecosystem, effectively connecting IT, OT, real-time devices, and SQL data sources seamlessly while enhancing operational efficiency. This integration not only streamlines processes but also fosters better decision-making and data utilization across the board.

Lucidchart is the next-generation diagramming tool that combines artificial intelligence, data integration, and intuitive design to help businesses streamline workflows, optimize processes, and improve collaboration. From AI-generated diagrams to seamless real-time collaboration, Lucidchart provides everything you need to create professional, data-driven visuals. It supports a wide range of use cases, including creating process maps, technical diagrams, organizational structures, and systems planning, all within an easy-to-use platform. With powerful features like AI diagramming, data linking, and integration with popular business apps like Jira, Confluence, Slack, and Teams, Lucidchart ensures your teams stay aligned and informed, driving smarter decisions and faster innovation across the board.

DbSchema is a cutting-edge application tailored for collaborative visual design, deployment, and documentation of database schemas among team members. Featuring a variety of integrated tools like data exploration, a visual query editor, and a data generator, it proves to be an indispensable asset for anyone engaged in daily database work. The tool supports a broad spectrum of relational and No-SQL databases, such as MySQL, PostgreSQL, SQLite, Microsoft SQL Server, MongoDB, MariaDB, Redshift, Snowflake, and Google, thereby addressing a multitude of database requirements. A highlight of DbSchema is its ability to reverse-engineer database schemas, transforming them into visual diagrams that users can interact with through other visual tools. Moreover, the DbSchema model retains its own version of the schema, which is separate from the actual database, facilitating smooth deployment across various platforms. This unique feature allows users to save their design models as files, utilize GIT for storage, and collaborate on schema designs without the necessity of a direct database connection. Users can also easily compare various schema versions and create SQL migration scripts, thereby boosting their overall workflow efficiency. In essence, DbSchema not only enhances team collaboration but also significantly optimizes database management workflows, making it an invaluable tool in the field.

ERD Lab is an online application designed for crafting ER diagrams, allowing users to visually construct their database structures. You have the option to import existing SQL databases or build new ones without the need for coding. This platform simplifies the visualization of your database schemas, facilitating easy sharing and collaboration among team members. After finalizing your design, you can export it in various formats, including SQL, PDF, or image files, and all of these functionalities are offered for free! Suitable for beginners and seasoned developers alike, ERD Lab ensures a seamless user experience that caters to all skill levels. This makes it an invaluable resource for anyone looking to enhance their database design process.

Oracle Analytics serves as an all-encompassing platform tailored for various analytics user roles, incorporating AI and machine learning throughout to enhance productivity and facilitate more informed business decisions. You can choose between Oracle Analytics Cloud, our cloud-based service, or Oracle Analytics Server, our solution for on-premises deployment, both of which guarantee strong security and governance features without sacrificing quality. This versatility allows organizations to select the deployment method that best suits their needs while maintaining essential data protection standards.

Hackolade Studio is a next-generation data modeling solution designed for today’s diverse and hybrid data environments. Initially created to fill the gap in visual modeling tools for NoSQL, Hackolade has expanded into a multi-model platform supporting a wide range of modern technologies. It enables agile schema design and governance for both structured and semi-structured data, making it well-suited for teams working across relational databases, NoSQL stores, data warehouses, and streaming systems. Supported technologies include Azure SQL, Oracle, PostgreSQL, SQL Server, MongoDB, Cassandra, DynamoDB, Neo4j, BigQuery, Databricks, Redshift, Snowflake, and Kafka with Confluent Schema Registry, as well as OpenAPI and GraphQL for API modeling. Hackolade also offers support for data exchanges stored on AWS S3, Azure Blob Storage and ADLS Gen1 and Gen 2, for formats such as JSON Schema, Avro, Parquet, Protobuf, and YAML. It also integrates with metadata governance tools like Unity Catalog and Collibra. These integrations help organizations maintain compliance, manage lineage, and ensure high data quality across systems. Key features include forward and reverse engineering, schema versioning, type mapping, and collaborative model design. Whether modeling new systems, documenting legacy databases, or managing API data contracts, Hackolade provides a centralized, visual interface that helps teams design and evolve schemas efficiently. Enterprises in finance, healthcare, telecom, and retail use Hackolade to support initiatives in data governance, data mesh, API-first development, and cloud migration, making it a key tool in the modern data stack.

Easily connect to your data warehouse, allowing your team to authenticate almost instantly through SSO. Use SQL to structure your business intelligence for improved understanding and insight. Feel confident in making updates, knowing that automated testing will confirm the integrity of each change. You can deploy models with assurance and effortlessly revert to previous versions if any unforeseen problems surface. Quary interfaces directly with your sensitive data storage while being built with strong security protocols from the beginning. Your data is kept within your own ecosystem, with communication limited to interactions between your Quary client and the data repository. Work together to transform, model, test, and deploy data as a unified team. SSO is a fundamental aspect of our core offering, and we assist in its setup for seamless integration. There’s no need to share credentials, as Quary improves the existing access management systems of your data store. We are in the process of achieving SOC2 compliance and have professionals on our team with CISSP certifications committed to safeguarding your data, providing you with confidence while you operate. Each of these features is meticulously designed to create a safe and effective data management experience, ensuring that your organization can thrive without compromising security.

Software Ideas Modeler is an essential tool for software engineering professionals, offering a wide range of features that support software design with different diagramming techniques and modeling functionalities. This all-encompassing CASE tool grants users the ability to work with various diagram types, including UML modelers, ERD designers, flowchart creators, wireframing tools, and BPMN editors, all at no charge. Each diagramming component is specifically designed to cater to distinct tasks within its domain, enabling users to efficiently create UML diagrams, Layer diagrams, Flowcharts, and Data Flow Diagrams, among others, for effective software or component design. Moreover, the documentation and glossary tools included enhance the clarity of communication regarding design ideas. You can also apply Advanced Use Case analysis or User Stories, allowing for a structured approach to gathering user requirements tailored to your method of choice. In addition, the code analysis features empower users to transform code into diagrams for various widely-used programming languages. The platform also allows for the generation of source code scaffolds and specific code snippets via customizable source code generators with tailored templates. By integrating these diverse tools into your workflow, you can significantly improve both your design methodologies and the overall efficiency of the software development process, fostering a more productive environment for creating high-quality applications. Overall, Software Ideas Modeler proves to be a versatile solution for anyone seeking to streamline their software engineering projects.

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.

HeidiSQL is a free software tool designed for ease of use, enabling users to view and modify data as well as manage structures on systems utilizing MariaDB, MySQL, or Microsoft SQL databases. Created by Ansgar in 2002, HeidiSQL has become one of the leading applications for working with MariaDB and MySQL. This open-source program is accessible to all and allows for the simultaneous connection of multiple servers within a single interface. It supports not only MariaDB, MySQL, and MS SQL but also offers connectivity through command line, SSH tunnels, or SSL settings. Users can perform a wide range of actions, including editing tables, views, stored procedures, triggers, and scheduled events, as well as creating elegant SQL exports that can be compressed or copied directly to the clipboard. Moreover, exporting data can be done seamlessly from one server or database to another, and the tool offers functionality for managing user privileges, importing text files, and exporting table rows in various formats such as CSV, HTML, XML, SQL, LaTeX, Wiki Markup, and PHP Array. With a user-friendly grid interface, HeidiSQL facilitates effortless browsing and editing of table data, making database management intuitive and efficient. Overall, the versatility and robust features of HeidiSQL make it an indispensable tool for database administrators and developers alike.

The practices of version control, quality assurance, documentation, and modularity facilitate collaboration among data teams in a manner akin to that of software engineering groups. It is essential to treat analytics inaccuracies with the same degree of urgency as one would for defects in a functioning product. Much of the analytic process still relies on manual efforts, highlighting the need for workflows that can be executed with a single command. To enhance collaboration, data teams utilize dbt to encapsulate essential business logic, making it accessible throughout the organization for diverse applications such as reporting, machine learning, and operational activities. The implementation of continuous integration and continuous deployment (CI/CD) guarantees that changes to data models transition seamlessly through the development, staging, and production environments. Furthermore, dbt Cloud ensures reliability by providing consistent uptime and customizable service level agreements (SLAs) tailored to specific organizational requirements. This thorough methodology not only promotes reliability and efficiency but also cultivates a proactive culture within data operations that continuously seeks improvement.

ERDPlus is a web-based application designed for database modeling that simplifies the development of entity relationship diagrams, relational schemas, star schemas, and SQL DDL statements. This user-friendly platform allows individuals to quickly create Entity Relationship Diagrams (ERDs) with ease. It supports a range of contemporary relational database management systems, including Oracle, MySQL, Microsoft SQL Server, PostgreSQL, Teradata, IBM DB2, Microsoft Access, and more. The tool's notation system effectively captures both regular and weak entities, while also accommodating a variety of attribute types such as unique, multi-valued, derived, composite, and optional attributes, along with all cardinality constraints for relationships, which encompass both mandatory and optional associations. Moreover, ERDPlus simplifies the process of establishing foreign keys and maintaining referential integrity through intuitive click-and-connect features, enhancing the development of relational schemas. The notation also improves visualization by distinguishing between fact tables and dimension tables, using a thicker border around fact tables to facilitate better comprehension of database structures. In addition, the platform's versatility and ease of use make it an indispensable resource for database designers aiming for both efficiency and accuracy in their projects. Ultimately, ERDPlus proves to be an essential tool for anyone involved in database design and management.

Revolutionize your business intelligence strategy with AI-powered solutions that streamline the complexities associated with data modeling. Instantly create sales dashboards, uncover critical insights, and collaborate seamlessly in real-time, avoiding the typical delays that hinder productivity. With Zebra AI, you can develop those dashboards in less than 15 seconds, making it a perfect asset for everyone from business analysts to CEOs; just upload your data and allow our AI to take care of the rest, delivering your dashboard instantly. We place a strong emphasis on safeguarding your business data, ensuring its confidentiality and separation from broader machine learning processes. Move past conventional chart-making tools; Zebra AI serves as your trusted advisor, helping you discern trends, access information with ease, and craft compelling presentations. Sharing your dashboards and AI-generated discussions is a breeze, enabling your entire team to work from a unified and dependable data source—all accomplished with just a few clicks. This groundbreaking platform transcends the role of a simple chatbot; it empowers experienced data analysts with the essential tools needed to address even the most complex inquiries and analyses efficiently, boosting productivity across all levels. Ultimately, Zebra AI is crafted not only to streamline your workflow but also to empower every member of your team to harness data for making informed and strategic decisions, fostering a culture of data-driven excellence throughout your organization. Embrace the future of data intelligence with Zebra AI and unlock the full potential of your business.

5X is an all-in-one data platform that provides users with powerful tools for centralizing, cleansing, modeling, and effectively analyzing their data. The platform is designed to enhance data management processes by allowing seamless integration with over 500 data sources, ensuring efficient data flow across all systems through both pre-built and custom connectors. Covering ingestion, warehousing, modeling, orchestration, and business intelligence, 5X boasts an intuitive interface that simplifies intricate tasks. It supports various data movements from SaaS applications, databases, ERPs, and files, securely and automatically transferring data to data warehouses and lakes. With its robust enterprise-grade security features, 5X encrypts data at the source while also identifying personally identifiable information and implementing column-level encryption for added protection. Aimed at reducing the total cost of ownership by 30% when compared to custom-built solutions, the platform significantly enhances productivity by offering a unified interface for creating end-to-end data pipelines. Moreover, 5X empowers organizations to prioritize insights over the complexities of data management, effectively nurturing a data-centric culture within enterprises. This emphasis on efficiency and security allows teams to allocate more time to strategic decision-making rather than getting bogged down in technical challenges.

RapidMiner is transforming the landscape of enterprise AI, enabling individuals to influence the future in meaningful ways. The platform equips data enthusiasts across various skill levels to swiftly design and deploy AI solutions that yield immediate benefits for businesses. By integrating data preparation, machine learning, and model operations, it offers a user-friendly experience that caters to both data scientists and non-experts alike. With our Center of Excellence methodology and RapidMiner Academy, we ensure that all customers, regardless of their experience or available resources, can achieve success in their AI endeavors. This commitment to accessibility and effectiveness makes RapidMiner a leader in empowering organizations to harness the power of AI effectively.

Count serves as a collaborative data whiteboard that enables users to interact fully. It merges the inventive capabilities of a traditional whiteboard with the analytical prowess of BI Notebooks. Users can simplify intricate SQL queries and data models into linked cells, enhancing comprehension of the underlying logic. Incorporating sticky notes and visuals can assist stakeholders in grasping the concepts of your work. As you develop your project, collaboration with fellow analysts or stakeholders allows for quicker feedback. Additionally, any canvas can be transformed into a dynamic slideshow or interactive report, providing versatile presentation options. This tool not only fosters collaboration but also streamlines the data analysis process for improved outcomes.

Oracle SQL Developer Data Modeler is a free graphical application that enhances productivity and simplifies data modeling tasks. This tool allows users to easily create, view, and adjust a range of models, such as logical, relational, physical, multi-dimensional, and data type models. It also supports both forward and reverse engineering processes, promoting collaboration with its integrated source code management features. Its flexibility enables deployment in both traditional and cloud environments. As a key component of the Oracle Database Tools suite, Oracle SQL Developer Data Modeler is recognized as a robust, standalone product that offers an extensive selection of data and database modeling resources. Moreover, users can access additional materials, including a general FAQ, on the Data Modeler homepage. This document seeks to provide clarity on various pricing-related questions that have surfaced in the community, offering valuable information to assist users in addressing these concerns effectively. By equipping users with this knowledge, the document aims to empower them in making informed decisions regarding their data modeling needs.

DTM Data Modeler is a specialized CASE tool tailored for database developers, supporting both forward and reverse engineering tasks. This intuitive application facilitates the manipulation of logical and physical data models, which are represented through entity-relationship diagrams. Targeting database architects and developers, it establishes seamless connections with data sources via the ODBC interface, ensuring it works well with modern database management systems. Beyond handling essential model properties like entities and their relationships, the software allows the creation of indexes and triggers at the physical level that correspond with the designed database tables. Its foreign key migration feature significantly enhances schema development by offering a more user-friendly and visual method, thereby reducing the likelihood of integrity issues within the model. Additionally, users can produce database schema objects directly within the database or generate SQL scripts that mirror the model and comply with custom user-defined configurations, making the overall workflow more efficient and cohesive. In summary, DTM Data Modeler provides developers with an extensive array of tools essential for proficient database design and management, ensuring they can meet the demands of complex projects with ease. This comprehensive approach not only simplifies the development process but also promotes better collaboration among team members involved in database projects.

RestApp is an innovative No Code Data Activation Platform that offers a comprehensive solution for anyone looking to connect, model, and synchronize their data seamlessly with preferred tools. With RestApp, Data and Operations teams can activate their data in just a few minutes without any coding expertise by easily integrating with various databases and business applications. Users can utilize drag-and-drop features to implement SQL, NoSQL, and Python functions for data modeling, as well as create and collaborate on queries with team members. Furthermore, RestApp ensures that your data is automatically synchronized with the tools you use for optimal efficiency. The platform also simplifies the process of utilizing templates to compute essential financial KPIs such as churn rate, MRR, ARR, ACV, ARPU, and LTV, while facilitating customer lead scoring and generating automatic cohort analyses for in-depth insights. This holistic approach empowers teams to make data-driven decisions quickly and effectively.

GibsonAI stands as a transformative leap in the realm of AI-enhanced database engineering, revolutionizing the entire database lifecycle through automation, starting from the design stage to final deployment. By utilizing this platform, users can easily generate comprehensive database solutions, such as entity-relationship diagrams, optimized schemas, fully functional hosted databases, live CRUD APIs, and extensive documentation, all by conversing in plain language—eliminating the need for SQL coding or DevOps expertise. The ability to make seamless adjustments through natural language commands eliminates the hassle of manual migrations, significantly reducing downtime in the process. This innovative platform is especially beneficial for developers who want to accelerate their development cycles, startups that seek to deploy scalable applications rapidly, and enterprise teams focused on improving their database engineering and maintenance practices. Ultimately, GibsonAI not only streamlines complex processes but also enables teams to prioritize innovation and scalability, thus fostering an environment conducive to growth and advancement. With its user-friendly approach, GibsonAI is setting a new standard in the industry for database management and development efficiency.

Streamline and improve the accessibility of enterprise data using erwin Data Modeler, a top-tier data modeling tool favored by leading brands around the world. This powerful software helps create a unified view of data from multiple sources, facilitating better understanding and trust in the data across the organization. Available in three different editions—Standard, Workgroup, and Navigator—erwin Data Modeler meets diverse business needs. By choosing the edition that best suits their requirements, organizations can customize their approach to data modeling, thereby strengthening data governance and driving more informed decision-making. This adaptability allows businesses to effectively harness their data assets for greater strategic advantage.

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.

The Databricks Data Intelligence Platform empowers every individual within your organization to effectively utilize data and artificial intelligence. Built on a lakehouse architecture, it creates a unified and transparent foundation for comprehensive data management and governance, further enhanced by a Data Intelligence Engine that identifies the unique attributes of your data. Organizations that thrive across various industries will be those that effectively harness the potential of data and AI. Spanning a wide range of functions from ETL processes to data warehousing and generative AI, Databricks simplifies and accelerates the achievement of your data and AI aspirations. By integrating generative AI with the synergistic benefits of a lakehouse, Databricks energizes a Data Intelligence Engine that understands the specific semantics of your data. This capability allows the platform to automatically optimize performance and manage infrastructure in a way that is customized to the requirements of your organization. Moreover, the Data Intelligence Engine is designed to recognize the unique terminology of your business, making the search and exploration of new data as easy as asking a question to a peer, thereby enhancing collaboration and efficiency. This progressive approach not only reshapes how organizations engage with their data but also cultivates a culture of informed decision-making and deeper insights, ultimately leading to sustained competitive advantages.