Name your core object
Identify the object your product revolves around and whether it's shared or private per user.
SAAS DATA MODEL
SaaS Data Model Designer
Define the minimum entities and relationships for accounts, users, and product data your SaaS MVP actually needs.
- Uses your inputs in a transparent calculation
- Instant result with practical next steps
- No signup required
Planning guidance only. Validate important decisions with customer evidence and your delivery team.
YOUR INPUTS
Build your result
Complete every field. The result updates only when you choose Calculate.
How it works
We build the minimum schema
A membership join table, version history, or external reference table is added only when required.
Get entities and relationships
The full entity list and the relationships between them are generated, ready to translate into a database schema.
Continue learning: Which MVP metrics matter? · Proof of concept vs prototype
Frequently asked questions
Why add a Membership join table only sometimes?
If your core object is private per user, a direct User-to-object relationship is simpler and sufficient. A join table is only needed once an object is shared across multiple account members.
Should I always add version history?
No. Version history adds real storage and query complexity. Add it only when there's a genuine requirement — audit compliance or user-facing undo — not speculatively.
Is this a replacement for a full ER diagram?
No. It's a starting minimum model to translate into your actual database schema and ER diagram, not the final detailed design.
How We Compare
| Feature | MVPHub | dbdiagram.io | ChatGPT |
|---|---|---|---|
| Minimum entity list from your own inputs | Included | Not included | Limited |
| Complexity-aware recommendations | Included | Not included | Not included |
| Visual ER diagram editor | Not included | Included | Not included |
| Free-form schema brainstorming | Not included | Not included | Included |
dbdiagram.io lets you draw and refine a full ER diagram, and ChatGPT can brainstorm schema ideas from a prompt. MVPHub calculates the minimum entity set your specific inputs require before you diagram it.
Related tools
Embed this tool
Add this tool to your site with the canonical iframe below. It remains hosted and maintained by MVPHub.