ERDPlus is a free, browser-based ER diagram tool built for teaching relational database concepts. It supports Chen and Crow's Foot notation and is an excellent learning tool for students. But when a team needs to design a production database schema, collaborate in real-time, and connect to a live database, ERDPlus reaches its limits quickly.
ER Flow is built for professional database design. The visual canvas supports all major relational database engines — PostgreSQL, MySQL, SQLite, SQL Server, Oracle — with accurate column type validation for each. An AI assistant accelerates design by generating schema objects from natural language. Real-time collaboration means the whole team contributes to the schema simultaneously instead of passing diagram files by email.
The capability that sets ER Flow apart from any academic tool is the Database Manager. ER Flow connects directly to your database and lets you run SELECT, INSERT, and UPDATE queries from inside the modeling environment. Design a table, populate it with test data, validate your foreign keys — all without switching tools. When the model is ready, generate migration files for Laravel or Phinx with one click.
| Feature | ER Flow | ERDPlus |
|---|---|---|
| Target Audience | Professional engineering teams designing production schemas | Students and educators learning database concepts |
| Database Manager | Connect to live database, run SELECT / INSERT / UPDATE queries inside the tool | No database connection — academic diagrams only |
| Real-Time Collaboration | CRDT-powered live editing — multiple team members simultaneously | No collaboration — single-user tool |
| AI Assistant | AI chat generates full schemas from natural language descriptions | No AI integration |
| Migration Output | Generates Laravel migrations, Phinx migrations, or raw SQL from schema diffs | Basic SQL export only — no framework support |
Every column in ER Flow is validated against the type system of your target database. PostgreSQL TEXT is not the same as MySQL TEXT. ER Flow knows the difference. ERDPlus treats all columns as abstract concepts without database-specific validation.
Connect ER Flow to your actual database and run queries without leaving the tool. Create a table, insert test rows, run a SELECT — validate your design against real data before writing a single migration.
Describe your data model in natural language and ER Flow's AI creates the schema. Add a product catalog, define a user roles system, or model a billing structure — the AI handles the tables, foreign keys, and indexes while you review.
ER Flow tracks every schema change with named checkpoints. When you're ready to deploy, compare any two checkpoints and generate the exact migration file you need. ERDPlus exports a static SQL dump — ER Flow exports a deployment pipeline.
Free to get started. No credit card required.