Dev tools · alternatives · 2026

24 alternatives to Atmo

Mock data for your prototypes and demos

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. Atmo launched in 2017; newer entries below may have overtaken it.

1. 1
   Proto.io 6▲175

   Design, prototype, collaborate, test. Prototyping for all.

   2016 · proto.io · its alternatives →

2. 2
   Atmo▲4

   Server Side Api Mocking made easy with UI

   2016 · github.com · its alternatives →

3. 3
   Mockaroo▲354

   A realistic data generator to test your app

   2015 · mockaroo.com · its alternatives →

4. 4
   Verify▲120

   Test out ideas before you implement them.

   2015 · verifyapp.com · its alternatives →

5. 5
   Mocktotype▲149

   A simple tool to display your mockups in a browser

   2015 · its alternatives →

6. 6
   Experiment Board▲127

   Free tool & method for testing startup ideas

   2014 · its alternatives →

7. 7
   Spaces by proto.io▲155

   A community to showcase your interactive prototypes

   2014 · spaces.proto.io · its alternatives →

8. 8
   Mockup World▲162

   The best free Mockups from the Web

   2015 · mockupworld.co · its alternatives →

9. 9
   Mockup Catalog▲138

   Discover & download curated freebies

   2015 · its alternatives →

10. 10
    Mocky ▲101

    A window into your team's Dropbox activity and projects

    2016 · mocky.com · its alternatives →

11. 11
    Device Mockups▲239

    Ready to use vector device mockups for Sketch & Illustrator

    2016 · its alternatives →

12. 12
    API Tester▲209

    The easiest way to test APIs

    2017 · its alternatives →

13. 13
    Mockup Zone▲101

    High quality mock up files for your presentation & showcase.

    2016 · mockup.zone · its alternatives →

14. 14
    Circuito.io▲147

    Instant code and wiring for your project

    2017 · circuito.io · its alternatives →

15. 15
    MockFlow SiteMap▲199

    Create beautiful sitemaps & UI flow

    2016 · mockflow.com · its alternatives →

16. 16
    Flinto▲121

    Quickly Create iOS Prototypes

    2013 · flinto.com · its alternatives →

17. 17
    MockThis▲80

    Generate mock data using AI

    2023 · its alternatives →

18. 18
    MockingBot▲82

    A rapid prototyping, design collaboration and handoff tool

    2018 · its alternatives →

19. 19
    Flinto▲52

    Super easy tool for prototyping

    2014 · flinto.com · its alternatives →

20. 20
    Prototyping Tools▲150

    Find the Prototyping Tool You Need

    2014 · bofu.ca · its alternatives →

21. 21
    Dynamic Mockups▲140

    Create realistic mockups at scale​

    2025 · dynamicmockups.com · its alternatives →

22. 22
    MockupsJar▲168

    Create realistic mockups for your website & mobile apps.

    2016 · mockupsjar.com · its alternatives →

23. 23
    Proto.io▲135

    Fast, fully-interactive, high-fidelity mobile prototypes

    2014 · proto.io · its alternatives →

24. 24
    Chepo▲163

    Get generated data with a single click

    2024 · hidaytrahman.github.io · its alternatives →

Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →