Best Free Data Modeling Tools of 2026

dbt Labs is redefining how data teams work with SQL. Instead of waiting on complex ETL processes, dbt lets data analysts and data engineers build production-ready transformations directly in the warehouse, using code, version control, and CI/CD. This community-driven approach puts power back in the hands of practitioners while maintaining governance and scalability for enterprise use. With a rapidly growing open-source community and an enterprise-grade cloud platform, dbt is at the heart of the modern data stack. It’s the go-to solution for teams who want faster analytics, higher quality data, and the confidence that comes from transparent, testable transformations.

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 FrameworX is a .NET-based SCADA and IIoT platform built for engineers who need full control over industrial applications, from edge devices to enterprise systems. AI Designer sets FrameworX apart. Using the Model Context Protocol (MCP), 18 specialized tools give AI direct, real-time access to the Designer IDE. You describe what you need and the AI configures tags, alarms, historian, devices, displays, and scripts immediately, in the same session, with no file imports or code generation. It connects natively with Claude, GitHub Copilot, Cursor, and any MCP-compatible model. Built-in domain intelligence covers ISA-95, UDTs, ISA-18.2 alarm philosophy, and historian best practices. Engineers report 2x to 10x faster configuration. The platform includes real-time data modeling, a built-in historian, alarm management, audit trails, reports, and native scripting in C#, VB.NET, JavaScript, and Python. Over 100 native drivers cover PLCs, DCS, OPC-UA, OPC-DA, and MQTT (broker, client, and SparkplugB). Deploy to web, mobile, or desktop with zero client installs. Every module ships included: Devices, Alarms, Historian, Reports, Security, and DevOps tools. No module licensing. No per-tag fees. Proven in 5,000+ deployments across water, energy, manufacturing, and infrastructure. (FrameworX was formerly known as FactoryStudio.)

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.

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

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.

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.

Montara enables BI Teams and Data Analysts to model and transform data using SQL alone, easily and seamlessly, and enjoy benefits such a modular code, CI/CD and versioning, automated testing and documentation. With Montara, analysts are able to quickly understand the impact of changes in models on analysis, reports, and dashboards. Report-level lineage is supported, as well as support for 3rd-party visualization tools like Tableau and Looker. BI teams can also perform ad hoc analysis, create dashboards and reports directly on Montara.

ExoCoding, an online platform for code generation, empowers software developers by enabling them to create better software faster. It uses AI-powered assistants that are based on models to generate boilerplate codes and streamline repetitive tasks. Developers can create applications that contain modules for Database Management, Logic Building and Interface Design. There are more features, such as sharing prototypes, task-planning, and a marketplace that offers pre-built templates, which enhance the developer experience. After generating the code (backend or frontend), it's business as usual. The same IDE, and other dev tool are used.

ZinkML is an open-source data science platform that does not require any coding. It was designed to help organizations leverage data more effectively. Its visual and intuitive interface eliminates the need for extensive programming expertise, making data sciences accessible to a wider range of users. ZinkML streamlines data science from data ingestion, model building, deployment and monitoring. Users can drag and drop components to create complex pipelines, explore the data visually, or build predictive models, all without writing a line of code. The platform offers automated model selection, feature engineering and hyperparameter optimization, which accelerates the model development process. ZinkML also offers robust collaboration features that allow teams to work seamlessly together on data science projects. By democratizing the data science, we empower businesses to get maximum value out of their data and make better decisions.