AI · alternatives · 2026

24 alternatives to Function-Calling Dataset Generator

Data Generation Tool for Function Calling, built for teams.

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.

1. 1
   I built an AI dataset generator▲169

   AI Dataset Generator – Create realistic datasets for demos, learning, and dashboards - metabase/dataset-generator

   2025 · github.com · its alternatives →

2. 2
   Mock API Generator▲555

   Generate custom data & API to build apps in less than 30s

   2021 · retool.com · its alternatives →

3. 3
   AI App Generator▲501

   Turn AI ideas into working apps in seconds

   2024 · anotherwrapper.com · its alternatives →

4. 4GT
   Generate test data for your database tables▲57

   2013 · databasetestdata.com · its alternatives →

5. 5
   Mockaroo▲354

   A realistic data generator to test your app

   2015 · mockaroo.com · its alternatives →

6. 6
   FAQ Generator▲285

   Enter website URL, get a ready AI generated FAQ

   2024 · gist.ly · its alternatives →

7. 7
   Universal Data: Generate▲101

   Create data on-the-fly using AI knowledge

   2023 · myriade.ai · its alternatives →

8. 8
   Creative Dataset Maker▲14

   AI-powered dataset generation

   2025 · its alternatives →

9. 9
   AI-Powered Mock API Generator▲86

   Generate customized, realistic mock data & APIs, via GPT

   2023 · its alternatives →

10. 10GJ
    Generate JSON mock data for testing/initial app development▲103

    Easily create complex JSON data structures using intuitive templates.

    2023 · jsongenerator.io · its alternatives →

11. 11JP
    JavaScript Program Synthesis▲139

    2021 · grgv.xyz · its alternatives →

12. 12
    OneGen▲63

    Application data modeling meets code generation

    2022 · guillotina.io · its alternatives →

13. 13
    Open-source AI data generator (now hosted)▲39

    Hey HN! A few months ago we shared our AI dataset generator as an open source repo, and the response was incredible (https://news.ycombinator.com/item?id=44388093). We got requests from folks who wanted to use it without the hosting overhead, so we created both options: a hosted version (https://www.metabase.com/ai-data-generator for instant use and the source code fully open (https://github.com/metabase/dataset-generator) for anyone who wants to self-host or contribute. Looking forward to seeing how you use it and what you build on top of…

    2025 · metabase.com · its alternatives →

14. 14
    Tactic Generate▲81

    Generate reports and analysis from your documents using GPT

    2023 · tactic.fyi · its alternatives →

15. 15
    Curator – an open-source library for synthetic data generation▲13

    Synthetic data generation is an essential step in training and evaluating LLMs/Agents/RAG pipelines, but tooling around this is still lacking. We're introducing Curator, an open-source library designed to streamline the data curation process. While there are many libraries to prompt LLMs, the semantics of generating synthetic data is different from prompting. For example, we need to process a large number of prompts (sometimes in millions or more) while accepting some failures, utilize several stages of prompting, incorporate human feedback, and filter out bad data using verifiers…

    2025 · github.com · its alternatives →

16. 16
    Annotate▲106

    Powering AI, one data point at a time

    2023 · annotate.my.canva.site · its alternatives →

17. 17
    Data Generator Plugin for Figma▲100

    Generate realistic, randomized data in over 30 languages

    2023 · figma.com · its alternatives →

18. 18
    Types Generator▲61

    Types generator will auto generate TS Interfaces from JSON

    2022 · vineethtrv.github.io · its alternatives →

19. 19
    My Attempt to Organize the World of AI Dev Tools▲101

    I've been exploring the (not so=) amazing potential of AI in coding and have compiled a list of tools. From AI-powered IDEs to code generators, this resource is my contribution to the community. I'm still on the fence about including txt2sql projects, as their functionality seems too basic to me. And I'm personally maintaining this, so your feedback is wellcome.

    2025 · aicode.danvoronov.com · its alternatives →

20. 20
    Generate JSON▲77

    AI-generated dummy JSON - deploy in seconds

    2023 · jsonviewer.stack.hu · its alternatives →

21. 21AG
    Auto-generate load tests/synthetic test data from OpenAPI spec/HAR file▲33

    Hey HN, We just shipped a new AI-powered feature... BUT the "AI" piece is largely in the background. Instead of relying on a chatbot, we've integrated AI (with strict input & output guardrails) into a workflow to handle two specific tasks that would be difficult for traditional programming: 1. Identifying the most relevant base URL from HAR files, since it would be tedious to cover every edge case or scenario to omit analytics, tracking, and other network noise. 2. Generating synthetic data for API requests by passing the API context and faker-js functions to GPT-4. The steps are broken down…

    2024 · docs.multiple.dev · its alternatives →

22. 22
    DATA-Generator▲3

    Generate realistic data in seconds for free.

    2024 · its alternatives →

23. 23
    LLM Function Generator▲10

    Create custom LLM functions effortlessly

    2024 · its alternatives →

24. 24
    Faker – Struct Data Fake Generator in Go▲34

    Go (Golang) Fake Data Generator for Struct. [Notes]This repository is archived, moved to the new repository https://github.com/go-faker/faker - bxcodec/faker

    2019 · github.com · 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 →