
JSON Formatter & Validator
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JSONFormatter.org
FreeFormatter
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SmallDevTools
TheDevTools
FOSS tools for developers

OpenInsider
InsiderAct
Finviz Insider Trading
InsiderBuyStock
Insider Tracking
InsiderTape
ChartMill
Track meaningful SEC Form 4 insider trades and congressional disclosures, filtered for signal

Which is more popular?
Website, pricing, platforms and company facts side by side.
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|---|---|---|
| Website | developertools.tech | insidertradingtracker.co |
| Pricing | ||
| Platforms | — | |
| Company | — | 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


No description of DeveloperTools.Tech yet.
Insider Trading Tracker monitors SEC EDGAR for Form 4 filings and STOCK Act congressional disclosures, surfacing only meaningful open-market trades. Filter by market cap, sector, insider role, and trade size. Set email alerts, build watchlists, and cross-reference what corporate insiders and...
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
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing DeveloperTools.Tech and InsiderTradingTracker.co.
InsiderTradingTracker.co's answer:
The only tracker that cross-references SEC Form 4 corporate insider trades with STOCK Act congressional disclosures on the same page. See what CEOs and Congress are buying in the same stock.
InsiderTradingTracker.co's answer:
Combines two insider data sources (corporate + congressional) that competitors keep separate. AI-powered trade analysis. Clean SEO-friendly URLs for every ticker and politician.
InsiderTradingTracker.co's answer:
Retail investors and traders who want to follow smart money signals — corporate executives and members of Congress disclosing their stock trades.
InsiderTradingTracker.co's answer:
Built to answer one question: before buying a stock, what are the people with the most information (executives and politicians) actually doing? Two signals, one page.
InsiderTradingTracker.co's answer:
Next.js, PostgreSQL, Drizzle ORM, Railway, Supabase, Anthropic API.
Share your experience with using DeveloperTools.Tech and InsiderTradingTracker.co. For example, how are they different and which one is better?
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The JSON Formatter was created to help with debugging.
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OpenInsider is an SEC Form 4 insider screener that allows you to monitor the insider trading filings for insider buying and selling.
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A collection of developer tools in one place in your browser
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Track recent insider stock purchases and get alerts when C-suite insiders buy their own stock. Cluster buy signals, large insider buys, and SEC Form 4 data. Free to start.
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Online JSON Formatter and JSON Validator will format JSON data, and helps to validate, convert JSON to XML, JSON to CSV. Save and Share JSON
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Finviz Insider Trading platform allows you to perform trades, investments, and transactions in the company’s stock shares.
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