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JSONFormatter.org
FreeFormatter
JSON Editor Online
SmallDevTools
TheDevTools
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FinViz
Koyfin
TradingView
AlphaResearch.io
AlphaScreener
GoCharting
Intraday Screener
An AI-first stock screener and backtester for US stocks and ETFs. Build screens in plain English across technicals, fundamentals, news sentiment and insider trades, then backtest the screen itself. Every AI answer cites its source.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | developertools.tech | ninethirty.ai |
| Pricing | ||
| Company | — | 10 - 19 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of DeveloperTools.Tech yet.
Most traders build a shortlist in one tool and reason about it in another. The screener returns tickers, the thinking happens in a spreadsheet, and weeks later nobody remembers which condition was the actual bet. NineThirty closes that gap for US equities and ETFs. Screen in plain English Type...
What each product offers, as listed by its team.


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Overall verdict
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Recommended for
No analysis of NineThirty yet.
How often each product is chosen within a category, 0–100% relative to the other.


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