
Mockaroo
DataConstruct
Data Creator
Datamade
Random Data
Generate and manage synthetic datasets easily with DUMMY DATABASE

Alpha Vantage
Polygon.io
Financial Modeling Prep
FinancialData.net
FinFeedAPI
Hotstoks
Open Exchange Rates
The simplest and most effective way to access both realtime and historical stock, forex, cryptocurrency data, and over 100 technical indicators.
Which is more popular?
Based on our record, Twelve Data seems to be more popular. It has been mentioned 9 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | dummydatabase.com | twelvedata.com |
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| Platforms | — | |
| Company | Startup from Serbia · 1 - 9 employees · 2024 | — |
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In their own words, as submitted to SaaSHub.


Dummy Database is built to solve a simple, yet annoying problem — generating realistic test datasets quickly, without writing scripts or juggling Excel files. It’s designed for: - Developers needing dummy databases for prototyping & testing. - Analysts and BI specialists preparing demo...
No description of Twelve Data yet.
What each product offers, as listed by its team.


Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
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How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing DUMMY DATABASE and Twelve Data.
DUMMY DATABASE's answer
A free, all-in-one data generation platform that builds everything from simple tables to full relational databases with advanced controls, unique event sequences, ERD visualization, built-in SQL querying, and multiple export formats — no limits, no paywalls.
DUMMY DATABASE's answer
Unlike other data generators, DUMMY DATABASE gives you full relational database creation, unique event simulations, advanced control over every field, built-in SQL querying, and generous free limits — so you can go from idea to test-ready data without restrictions, subscriptions, or hidden fees
DUMMY DATABASE's answer
DUMMY DATABASE's answer
Began as a project for myself to be able to have custom datasets for testing purpose I've decided that it could be useful for wider audience and finalized it as a full-stack web project
DUMMY DATABASE's answer
Python, Flask, HTML, CSS, Bootstrap, Redis, PostgreSQL, JavaScript
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External articles and on-site reviews we used to compare the two products.


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Straightforward to use and powerful API to get financial data in real-time and complete historical data. Best in class Python package.
Recommendations tracked on public social media and blogs since March 2021.


Tracking DUMMY DATABASE since Aug 2025.
I chose Twelve Data for stock and crypto prices. Free tier: 800 calls per day. My math: 5 symbols × 96 fetches/day (every 15 minutes) = 480 calls. Comfortable margin. - Source: dev.to / 2 months ago
I am using TwelveData forex API for Extraction of raw data from the financial markets in JSON format. - Source: dev.to / over 1 year ago
Twelve Data provides extensive financial market coverage, making it ideal for those looking for a free API for building a stock portfolio tracker. - Source: dev.to / over 1 year ago
When comparing DUMMY DATABASE and Twelve Data, you can also consider the following products.
A realistic data generator to test your app
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Alpha Vantage offers free APIs in JSON and CSV formats for realtime and historical stock and forex data, digital/crypto currency data and over 50 technical indicators.
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Polygon.io offers streaming realtime data for stocks/equities, ETFs, Indecies and Forex/Currencies including crypto currencies. Our Real-Time Stock Data APIs help you build the future on fintech.
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Data generator that can create a table filled with pseudo-random content.
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Access all stocks discounted cash flow statements, market price, stock markets news, and learn more about Financial Modeling. Learn M&A, LBO, DCF, Comps, and Financial Statement Modeling thought concrete examples
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