>_ best Free Alt Data tools
The 21 top free alt data tools in the index, ranked by upvotes.
- 01.validityBase— validityBase makes the history of data, signals and track records independently verifiable and helps to package data for systematic investors.
- 02.Tradermap Crypto Terminal— Tracks prediction market trades, crypto whale activity, liquidations, and real-time news in a unified terminal interface.
- 03.AltIndex— Aggregates alternative data signals including Reddit mentions, web traffic, app downloads, job postings, and sentiment across 2,527+ stocks, ETFs, and cryptocurrencies with AI-powered scoring and alerts.
- 04.AltIndex— Tracks social media mentions, sentiment, and alternative data signals across Reddit, Twitter, and other platforms for 2,500+ stocks, ETFs, and cryptocurrencies with historical time series and real-time alerts
- 05.ShareStructure— Analyzes SEC filings to reconstruct share structures including warrants, convertible notes, and preferred shares, scoring dilution risk for micro-cap and small-cap stocks.
- 06.Activ8 Insights— Tracks activist short seller reports, ranks investigators by verified stock impact, and provides forensic scoring on targeted companies with real-time alerts.
- 07.FOIAsearch.com— Searches SEC FOIA logs for requests on companies, highlighting B7A exemptions that indicate potential undisclosed SEC investigations.
- 08.AskEdgar— Extracts structured data from SEC filings in real time, monitors dilution events, offerings, registrations, and compliance status, delivering proprietary datasets and alerts via API and web platform.
- 09.Quiver Quantitative— Aggregates alternative data on congressional trading, insider transactions, hedge fund activity, lobbying, government contracts, and corporate political contributions for equity research.
- 10.Value Add VC— Provides a suite of venture capital analysis tools including fund benchmarking, unicorn tracking, SPV calculators, IPO dashboards, and startup data across 45+ free tools
- 11.Alva— Converts investment theses and market narratives into live playbooks with backtesting, automation, data APIs, and 24/7 agent execution
- 12.Homesage.ai— Provides AI-powered investment property search, property analysis reports, and real estate data APIs covering 150M+ US residential properties with computer vision-driven renovation estimates and investment scoring.
- 13.IndexMundi— Aggregates global country statistics, economic indicators, and commodity data from sources like World Bank and USDA into searchable visualizations and comparative tools.
- 14.Redfin Data Center— Provides downloadable CSV datasets covering US housing market metrics including prices, inventory, buyer/seller balance, luxury market activity, and financing trends
- 15.WhaleWisdom— Tracks institutional investor 13F filings, insider transactions, 13D/13G disclosures, and mutual fund holdings with backtesting and portfolio replication tools
- 16.HighShortInterest.com— Provides a sortable database of stocks with short interest above 20 percent, displaying float, outstanding shares, and industry data across major US exchanges.
- 17.PricingPages.com— Catalogs screenshots and design patterns of SaaS pricing pages for product teams building or auditing their own pricing.
- 18.Unusual Whales— Tracks real-time options flow, dark pool activity, congressional trading, Greek exposure, and unusual stock market data via web platform and API with 100+ endpoints.
- 19.Polyburg— Tracks real-time positions and performance of high-profit Polymarket wallets with AI-powered alerts and confidence scoring.
- 20.Wethr.net— Provides real-time weather observation data and model forecasts for trading weather derivatives on platforms like Kalshi and Polymarket
- 21.Job Radar— Tracking OpenAI, Anthropic & xAI career pages via their public APIs. No scraping required.
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