Generate Data
Faker
DataConstruct
Beeceptor
Fake Data
ExtendsClass JSON Generator
Smock-it
A realistic data generator to test your app

Xmind
Miro
MindMeister
DarkX
Whimsical
Brainfo
DeepNotes
No more hunting through files and folders, Constella surfaces related notes as you type on a visual canvas. Capture and connect thoughts quickly to build knowledge across life. For brainstorming or generating content, chat & work alongside Stella.

Which is more popular?
Based on our record, Mockaroo seems to be more popular. It has been mentioned 27 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | mockaroo.com | constella.app |
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What each product offers, as listed by its team.

Possible disadvantages
Possible disadvantages
Walkthroughs and reviews on video.
Best Free Sample Data Generator - Mockaroo.com
More videos
Constella app full review
How often each product is chosen within a category, 0–100% relative to the other.

Share your experience with using Mockaroo and Constella. For example, how are they different and which one is better?
Recommendations tracked on public social media and blogs since March 2021.

If you give it the rules to generate something, why can't it generate it? That's what something like Mockaroo[0] does. It's just more formal. That's pretty much what LLM training does, extracting patterns from a huge corpus of text. Then... - Source: Hacker News / over 1 year ago
A quick way to test this out is to use a tool like Mockaroo to generate some test data and then have a Glue Crawler analyse the data in S3 and create the required data catalog entries. - Source: dev.to / over 2 years ago
Mockaroo — Mockaroo lets you generate realistic test data in CSV, JSON, SQL, and Excel formats. You can also create mocks for back-end API. - Source: dev.to / over 2 years ago
Tracking Constella since Feb 2025.
When comparing Mockaroo and Constella, you can also consider the following products.

GenerateData.com: free, GNU-licensed, random custom data generator for testing software
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Xmind is a brainstorming and mind mapping application.
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Faker is a PHP library that generates fake data for you
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Join Millions of users that collaborate from all over the planet using Miro. Experience the power of the #1 visual workspace for innovation. More than 100M users and 250,000 companies are collaborating on the canvas.
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Create, share and collaboratively work on mind maps with MindMeister, the leading online mind mapping software. Includes apps for iPhone, iPad and Android.
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