Lucidchart

SmartDraw

SmartDraw is a diagramming platform that lets users create flowcharts, org charts, floor plans, network diagrams, mind maps, and technical engineering drawings without CAD expertise, using automatic formatting and drag-and-drop symbol libraries. It ships with over 4,500 professionally designed templates covering more than 70 diagram types, each paired with an industry-relevant symbol library, from commercial floor plans to fire pre-plans and accident reconstructions. SmartDraw integrates with Microsoft Office and Google Workspace for one-click export and sharing, and supports both cloud and desktop access with enterprise features like SSO provisioning and dedicated support. It is used by a large share of Fortune 500 companies and is positioned as a more template-rich, automation-focused alternative to blank-canvas diagramming tools like Visio or draw.io.

drawDB

drawDB is a web‑based tool that lets developers and DBAs create, edit, and share entity‑relationship diagrams directly in the browser. It supports forward and reverse engineering, letting you generate SQL from diagrams or import existing schemas. The platform is free, open‑source, and integrates with common version‑control workflows, making it ideal for collaborative schema design and documentation across teams.

draw.io

draw.io (also known as diagrams.net) is a free diagramming application used for flowcharts, network diagrams, wireframes, and technical documentation, with a strong emphasis on privacy and self-managed data storage. It is available as a browser app at app.diagrams.net and as a desktop application, and it deliberately maintains long-term backward compatibility with older diagram files.

Coggle

Coggle is a browser-based mind-mapping and flowcharting tool built around real-time collaboration, where multiple people can edit the same diagram simultaneously and see changes appear instantly. It supports unlimited image uploads, floating text and image annotations, multiple starting points within a single diagram, and loop/branch joining for more flexible flowchart-style layouts beyond a strict tree hierarchy. The free tier gives users three private diagrams plus unlimited public diagrams forever, with no time limit or trial pressure, while paid Awesome and Organisation tiers unlock unlimited private diagrams, advanced styling, SAML SSO, and team/billing management. With roughly 10 million users, Coggle is popular for its minimalist interface and complete diagram change history that lets users revert to any earlier version.

yEd Graph Editor

yEd is a free desktop diagramming application from yWorks for creating, editing, and analyzing diagrams. Rather than requiring every node to be placed by hand, it can import structured data directly from Excel spreadsheets or XML/GraphML files and use automatic layout algorithms, built on yWorks' commercial yFiles diagramming library, to arrange even large and complex graphs cleanly. It covers a wide range of diagram types including flowcharts, BPMN process diagrams, UML class diagrams, organization charts, and network topologies, and it exports finished diagrams to PNG, JPG, SVG, PDF, or SWF. Built as a cross-platform Java application, yEd runs offline on Windows, macOS, and Linux and is free for both personal and commercial use, making it a common choice for engineers, analysts, and IT teams working with data-driven diagrams.

Gliffy

Gliffy, owned by Perforce, is a diagramming tool built to work natively inside Confluence and Jira, letting teams create flowcharts, UML diagrams, BPMN process maps, and network diagrams without leaving their existing Atlassian workflow. It supports drag-and-drop editing, freehand drawing, and full-text search of diagram content within Confluence. Gliffy also offers a standalone Gliffy Online product and a Gliffy Zero Egress option built for regulated industries that require diagram data to stay within their own Atlassian environment for compliance reasons such as ITAR, GDPR, and HIPAA. The product holds SOC 2 Type II compliance and ISO 42001 certification.