Best Free Data Modeling Tools of 2025

Warehouse-Native Customer Journey Analytics—No Black Boxes. No Limits. Kubit is the leading customer journey analytics platform, built for product, data, and marketing teams who need self-service insights, real-time visibility, and full control of their data—all without engineering dependencies or vendor lock-in. Unlike traditional analytics tools, Kubit is warehouse-native, enabling you to analyze user behavior directly in your cloud data platform (Snowflake, BigQuery, or Databricks). No data extraction. No hidden algorithms. No black-box logic. With built-in support for funnel analysis, retention, user paths, and cohort exploration, Kubit makes it easy to understand what’s working—and what’s not—across the entire customer journey. Add real-time anomaly detection and exploratory analytics, and you get faster decisions, smarter optimizations, and more engaged users. Top enterprises like Paramount, TelevisaUnivision, and Miro trust Kubit for its flexibility, data governance, and unmatched customer support. Discover the future of customer analytics at kubit.ai

KS DB Merge Tools is an easy to use diff & merge tool for MySQL, MariaDB, Oracle Database, SQL Server, PostgreSQL, MS Access, SQLite and Cross-DBMS databases allowing to compare and sync both schema and data. Starting with a schema changes summary, results can be narrowed down to object lists of particular object type (table definitions, views, etc.), and then down to definition of particular object. Data changes can be retrieved as a high-level list of changes totals across all tables in the database, each total row count can be observed as a side-by-side list of rows for the given table, each changed row can be analyzed for changes in each column. Various diff results provide quick filters to show only new/changed/new+changed items (schema objects or table data rows), ability to select required changed items and generate scripts to apply these changes to the other side database. This script can be executed immediately or saved for future use.

Tatsoft's FactoryStudio provides the tools you need to quickly design secure and powerful industrial applications. Features include real-time data modeling and data logging, MQTT client/spB broker/spB, audit trails, alarms & incidents, visual SQL query gateway, high-performance smart screens, HTML5 dashboards. WPF drawing tools. iOS app, trends, annotations, reporting & much more! Programming scripts can be done in C#, VB.NET or JavaScript. You can get up and running in no time with ZERO client install and just 2 minutes server side installation. It includes many native protocol drivers for PLCs, DCSs, as well as support for other industry standards like OPC, MQTT, and more. Are you looking for a driver that we don't yet have? We also have a toolkit to help you develop protocol drivers! FactoryStudio is your data hub for your industrial ecosystem. It can be your link between IT, OT, real-time devices and your SQL data sources.

Lucidchart is a comprehensive visual collaboration platform that empowers teams to create intelligent, data-driven diagrams for process mapping, team planning, systems architecture, and more. With features like AI-powered diagram generation, real-time collaboration, and data integration, Lucidchart helps users quickly visualize their systems and workflows with ease. Whether you’re building technical diagrams or mapping out complex organizational structures, Lucidchart streamlines the process, saving you time and improving clarity. It integrates with a variety of popular tools such as Jira, Slack, Confluence, and Notion, making it an invaluable tool for enhancing teamwork, driving decisions, and accelerating innovation across your organization.

DbSchema is an innovative tool designed for collaborative visual schema design, deployment, and documentation within teams. Its various integrated features, such as data exploration, a visual query editor, and data generator, make it an essential resource for anyone working with databases on a daily basis. Supporting a wide range of both relational and No-SQL databases—including MySQL, PostgreSQL, SQLite, Microsoft SQL Server, MongoDB, MariaDB, Redshift, Snowflake, and Google—DbSchema caters to diverse database needs. One of its standout capabilities is reverse-engineering database schemas and representing them visually through diagrams. Users can engage with their databases through these diagrams and other visual tools. The DbSchema model maintains its version of the schema structure, which is distinct from the actual database, enabling seamless deployment across various databases. This feature allows users to save design models as files, store them in GIT, and collaborate on schema design without needing a direct database connection. Additionally, users can easily compare different schema versions and generate SQL migration scripts, enhancing their workflow efficiency. Ultimately, DbSchema empowers teams to streamline their database management processes effectively.

ERD Lab is a web-based tool for creating ER diagrams that enables users to design their databases visually. You can either import current SQL databases or create new ones without needing to write any code at all. This platform allows you to visualize your database schemas easily, making it simple to share and collaborate with your team members. Once you have completed your design, you can export it as SQL, PDF, or an image file, and the best part is that all these features are available at no cost! Whether you are a beginner or an experienced developer, ERD Lab offers a user-friendly experience for everyone.

Oracle Analytics is a comprehensive platform designed for all analytics user roles, integrating AI and machine learning across the board to boost productivity and enable smarter business decisions. Whether you opt for Oracle Analytics Cloud, our cloud-native service, or Oracle Analytics Server, our on-premises solution, you can ensure robust security and governance without compromise.

Hackolade Studio is a comprehensive data modeling platform built for today’s complex and hybrid data ecosystems. Originally developed to address the lack of visual design tools for NoSQL databases, Hackolade has evolved into a multi-model solution that supports the broadest range of data technologies in the industry. The platform enables agile, iterative schema design and governance for both structured and semi-structured data, making it ideal for organizations working across traditional RDBMS, modern data warehouses, NoSQL stores, and streaming systems. Hackolade supports technologies such as Oracle, PostgreSQL, BigQuery, Databricks, Redshift, Snowflake, MongoDB, Cassandra, DynamoDB, Neo4j, Kafka (with Confluent Schema Registry), OpenAPI, GraphQL, and more. Beyond databases, Hackolade Studio offers robust capabilities for API modeling, supporting OpenAPI (Swagger) and GraphQL, as well as native modeling for data exchange formats like JSON Schema, Avro, Protobuf, Parquet, and YAML. It also integrates with metadata and data governance platforms like Unity Catalog and Collibra, making it a powerful enabler for organizations focused on data quality, lineage, and compliance. Key features include reverse and forward engineering, schema versioning, data type mapping, and team collaboration tools. Whether you're building data products, managing data contracts, or migrating between systems, Hackolade Studio provides a unified interface for modeling, documenting, and evolving your schemas. Hackolade is trusted by enterprises across finance, retail, healthcare, and telecom to align data architecture with real-world delivery. It’s an essential tool for teams implementing data mesh, data fabric, microservices, or API-first strategies.

Connect seamlessly to your data warehouse, where SSO allows your team to authenticate in mere seconds. Organize your business intelligence using SQL for enhanced clarity. Feel assured when making changes, as automated testing verifies each update. Confidently deploy models and have the ability to revert to previous states if unexpected issues arise. Quary interfaces with your sensitive data store and is designed with robust security features from the outset. By default, your data remains within your own environment, with exchanges occurring solely between your Quary client and data store. Collaboratively transform data, model, test, and deploy as a cohesive unit. SSO is an integral part of our base plan, and we provide assistance with its setup to ensure smooth implementation. Sharing credentials is unnecessary, as Quary enhances your data store's existing access management systems. We are actively pursuing SOC2 compliance and have team members with security qualifications (CISSP) dedicated to protecting your data, ensuring you have peace of mind as you operate. All these features are crafted to foster a secure and efficient data management experience.

Software Ideas Modeler serves as a vital resource for professionals in the field of software engineering. This comprehensive CASE tool provides an array of features that assist in software design through various diagram types and modeling capabilities. You can explore our UML modeler, ERD designer, flowchart creator, wireframing tools, and BPMN editor without any cost. Each diagramming module is tailored to address specific tasks within its respective domain. With tools for UML diagrams, Layer diagrams, Flowcharts, and Data Flow Diagrams, among others, you can effectively design your software or its essential components. Additionally, our documentation and glossary features facilitate clear communication of your design concepts. Utilize Advanced Use Case analysis or User Stories to methodically process user requirements based on your preferred approach. Furthermore, the code analytic tools allow you to convert code into diagrams for various popular programming languages. You can also generate source code scaffolds and individual code segments through our source code generators, which can be customized with specific code templates. By incorporating these tools, you can enhance both your design process and overall software development efficiency.

ERBuilder Data Modeler, a GUI data modeling tool, allows developers to visualize, design and model databases using entity relationship diagrams. It automatically generates the most common SQL databases. Share the data model documentation with your team. You can optimize your data model with advanced features like schema comparison, schema synchronization, and test data generation.

HeidiSQL is a free program that aims to make it easy to use. "Heidi" allows you to view and edit data and structures on computers that run one of the following database systems: MariaDB, MySQL or Microsoft SQL. Ansgar invented HeidiSQL in 2002. It is one of the most popular tools for MariaDB or MySQL. OpenSource, free for everyone Multiple servers can be connected in one window. MariaDB, MySQL and MS SQL are supported. You can connect to servers via commandline. You can connect via SSH tunnel or SSL settings. Edit tables, views, stored procedures, triggers, and scheduled events. You can create beautiful SQL-exports and then compress them or copy them to the clipboard. Export directly from one server/database to another server/database. You can manage user privileges, import text-files, and export table rows in CSV, HTML HTML, XML, SQL, LaTeX Wiki Markup, and PHP Array. A grid allows you to browse and edit table-data.

Version control, quality assurance, documentation, and modularity enable data teams to work together similarly to software engineering teams. It is crucial to address analytics errors with the same urgency as one would for bugs in a live product. A significant portion of the analytic workflow is still performed manually. Therefore, we advocate for workflows to be designed for execution with a single command. Data teams leverage dbt to encapsulate business logic, making it readily available across the organization for various purposes including reporting, machine learning modeling, and operational tasks. The integration of continuous integration and continuous deployment (CI/CD) ensures that modifications to data models progress smoothly through the development, staging, and production phases. Additionally, dbt Cloud guarantees uptime and offers tailored service level agreements (SLAs) to meet organizational needs. This comprehensive approach fosters a culture of reliability and efficiency within data operations.

A web-based tool for database modeling that facilitates the creation of entity relationship diagrams, relational schemas, star schemas, and SQL DDL statements is ERDPlus. This intuitive platform enables users to generate Entity Relationship Diagrams (ERDs) swiftly and effortlessly. It is compatible with various modern relational database management systems such as Oracle, MySQL, Microsoft SQL Server, PostgreSQL, Teradata, IBM DB2, Microsoft Access, and many others. The tool's notation allows for the representation of regular and weak entities, accommodating different attribute types, including unique, multi-valued, derived, composite, and optional attributes, as well as all cardinality constraints for relationships, which include mandatory and optional associations. Furthermore, ERDPlus streamlines the creation of foreign keys and referential integrity lines through user-friendly click-and-connect actions, making it easier to develop relational schemas. Additionally, the notation enhances clarity by differentiating fact tables from dimension tables, employing a thicker frame around fact tables, which aids users in visualizing their database structures effectively. Overall, ERDPlus stands out as a valuable asset for database designers seeking efficiency and precision.

Transform your approach to business intelligence with AI-driven solutions that eliminate the complexities of data modeling. Quickly generate sales dashboards, gain valuable insights, and collaborate in real-time without the usual delays. With Zebra AI, you can create those dashboards in under 15 seconds, making it an ideal tool for anyone from business analysts to CEOs; simply upload your data and let our AI handle the rest to deliver your dashboard immediately. We prioritize the security of your business data, ensuring it remains private and separate from broader machine learning initiatives. Forget about traditional chart makers; Zebra AI acts as your reliable consultant, enabling you to identify trends, access information effortlessly, and create impactful presentations. You can easily share your dashboards and AI conversations, allowing your entire team to operate from the same reliable data source—all achievable with just a few clicks. This innovative platform goes beyond being a mere chatbot; it equips seasoned data analysts with the tools they need to tackle even the most intricate questions and analyses effectively, enhancing productivity across the board. Ultimately, Zebra AI is designed not just to simplify your workflow but to empower every team member to leverage data for informed decision-making.

5X is a comprehensive data management platform that consolidates all the necessary tools for centralizing, cleaning, modeling, and analyzing your data. With its user-friendly design, 5X seamlessly integrates with more than 500 data sources, allowing for smooth and continuous data flow across various systems through both pre-built and custom connectors. The platform features a wide array of functions, including ingestion, data warehousing, modeling, orchestration, and business intelligence, all presented within an intuitive interface. It efficiently manages diverse data movements from SaaS applications, databases, ERPs, and files, ensuring that data is automatically and securely transferred to data warehouses and lakes. Security is a top priority for 5X, as it encrypts data at the source and identifies personally identifiable information, applying encryption at the column level to safeguard sensitive data. Additionally, the platform is engineered to lower the total cost of ownership by 30% when compared to developing a custom solution, thereby boosting productivity through a single interface that enables the construction of complete data pipelines from start to finish. This makes 5X an ideal choice for businesses aiming to streamline their data processes effectively.

RapidMiner is redefining enterprise AI so anyone can positively shape the future. RapidMiner empowers data-loving people from all levels to quickly create and implement AI solutions that drive immediate business impact. Our platform unites data prep, machine-learning, and model operations. This provides a user experience that is both rich in data science and simplified for all others. Customers are guaranteed success with our Center of Excellence methodology, RapidMiner Academy and no matter what level of experience or resources they have.

Count is an interactive data whiteboard that allows for full collaboration. It combines the flexibility and creativity that a whiteboard offers with the power and reactivity of BI Notebooks. It is easy to break down complex SQL queries and data model into interconnected cells for better understanding the logic. Use sticky notes and graphics to help stakeholders understand your work. As you build, you can collaborate with other analysts or stakeholders to get faster feedback. Turn any canvas into a slideshow or interactive report.

Oracle SQL Developer Data Modeler is a complimentary graphical application designed to boost efficiency and streamline the process of data modeling. With this tool, users can effortlessly create, navigate, and modify various models, including logical, relational, physical, multi-dimensional, and data type models. The Data Modeler also offers capabilities for both forward and reverse engineering, while facilitating collaborative efforts through built-in source code management. It is versatile enough to be utilized in traditional setups as well as cloud-based environments. As part of the Oracle Database Tools suite, Oracle SQL Developer Data Modeler stands out as a comprehensive, independent product featuring a wide array of data and database modeling tools and utilities. Additional resources, including a general FAQ and other relevant materials, can be found on the Data Modeler homepage. This document aims to address some of the pricing-related inquiries that have emerged within the community, providing helpful insights for users navigating these questions.

DTM Data Modeler serves as a CASE tool designed for database developers, facilitating both forward and reverse engineering processes. This user-friendly application allows for the manipulation of both logical and physical data models, visualized through entity-relationship diagrams. Aimed at database architects and developers, it connects seamlessly with data sources through the ODBC interface, ensuring compatibility with contemporary database management systems. In addition to managing fundamental model properties, such as entities and their interrelationships, the software enables the creation of indexes and triggers at the physical level that align with the modeled database tables. The feature for foreign key migration enhances schema development by providing a more intuitive and visual approach, while also minimizing the risk of integrity errors within the model. Furthermore, users can generate database schema objects directly in the database or produce SQL scripts that reflect the model and adhere to custom user-defined settings, making the entire process more efficient and streamlined. Overall, DTM Data Modeler equips developers with a robust set of tools for effective database design and management.

RestApp is a No Code Data Activation Platform that provides anyone with an all-in one solution to connect, model and sync any data using his favorite tools. RestApp allows Data & Ops teams activate data in minutes using No-Code by: Connecting to your favorite databases and business apps Drag-and-drop SQL, NoSQL, and Python functions to model your data and then create and share queries with your colleagues - Automatically sync your data with your tools RestApp makes it easy to use our templates to: - Computing your main financial KPIs: churn rate, MRR, ARR, ACV, ARPU, LVT - Calculating your customers' lead scoring - Generate automatic cohort analyses

GibsonAI represents a groundbreaking advancement in AI-driven database engineering, transforming the entire lifecycle of databases through automation from the design phase all the way to deployment. Users can effortlessly create comprehensive database solutions, including entity-relationship diagrams, optimized schemas, fully deployed hosted databases, live CRUD APIs, and detailed documentation, simply by engaging in a conversation in everyday language—no SQL coding or DevOps management required. This platform allows for seamless alterations using natural language commands, thereby removing the need for manual migrations and minimizing downtime. It is particularly well-suited for developers looking to speed up their development processes, startups aiming to launch scalable applications, and enterprise teams intending to enhance their database engineering and maintenance operations. As a result, GibsonAI not only simplifies complex tasks but also empowers teams to focus more on innovation and growth.

Simplify and enhance the accessibility of enterprise data through erwin Data Modeler. Recognized as the leading data modeling tool, erwin Data Modeler is utilized by premier brands globally to establish a cohesive perspective of data from diverse sources, thereby promoting its utilization, comprehension, and reliability throughout the organization. This versatile software is offered in three distinct editions: Standard, Workgroup, and Navigator, catering to varying business needs. By leveraging these options, organizations can tailor their data modeling approach to align with their specific requirements and enhance overall data governance.

Explore, create, and manage databases utilizing Valentina DB, MySQL, MariaDB, PostgreSQL, and SQLite at no cost. Generate comprehensive business reports through Valentina Studio Pro, either on Valentina Server or within an application that utilizes an Application Developer Kit. Engage in backward engineering with standard practices while also employing forward engineering techniques in Valentina Studio Pro. Conduct reverse engineering to produce diagrams for pre-existing databases, and easily integrate new elements into these diagrams. Write SQL queries with features such as auto-completion and syntax highlighting, while also defining and managing favorite queries and accessing recent ones seamlessly. Benefit from a function browser that provides a dictionary for each SQL function as well as consoles that report errors, warnings, and performance metrics. Efficiently search and export result records in various formats including CSV, JSON, and Excel, while simultaneously editing the properties of multiple database objects. Delve deep into tables and fields with remarkable speed, and manage the addition or removal of users and groups, along with their associated privileges. This multifaceted approach ensures that users can handle database management with efficiency and effectiveness.

The Databricks Data Intelligence Platform empowers every member of your organization to leverage data and artificial intelligence effectively. Constructed on a lakehouse architecture, it establishes a cohesive and transparent foundation for all aspects of data management and governance, enhanced by a Data Intelligence Engine that recognizes the distinct characteristics of your data. Companies that excel across various sectors will be those that harness the power of data and AI. Covering everything from ETL processes to data warehousing and generative AI, Databricks facilitates the streamlining and acceleration of your data and AI objectives. By merging generative AI with the integrative advantages of a lakehouse, Databricks fuels a Data Intelligence Engine that comprehends the specific semantics of your data. This functionality enables the platform to optimize performance automatically and manage infrastructure in a manner tailored to your organization's needs. Additionally, the Data Intelligence Engine is designed to grasp the unique language of your enterprise, making the search and exploration of new data as straightforward as posing a question to a colleague, thus fostering collaboration and efficiency. Ultimately, this innovative approach transforms the way organizations interact with their data, driving better decision-making and insights.