>_ best Free Alt Data tools

The 22 top free alt data tools in the index, ranked by upvotes.

1. 01.
   validityBase— validityBase makes the history of data, signals and track records independently verifiable and helps to package data for systematic investors.

   Multi-assetData & APIsFREE-$$$· ▲ 5

   [↗] visit vbase.com[alternatives]
2. 02.
   Tradermap Crypto Terminal— Tracks prediction market trades, crypto whale activity, liquidations, and real-time news in a unified terminal interface.

   CryptoNews & SentimentFREE· ▲ 1

   [↗] visit tradermap.io[alternatives]
3. 03.
   Capitol Gains— Capitol Gains tracks stock trades by U.S. public officials across all three branches of government. It turns scattered disclosure filings into clear, timely investment intelligence and alerts users to trades worth knowing about.

   Multi-assetResearchFREE· ▲ 0

   [↗] visit capitolgains.info[alternatives]
4. 04.
   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.

   Multi-assetAlt DataFREE-$$$· ▲ 0

   [↗] visit altindex.com[alternatives]
5. 05.
   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

   Multi-assetAlt DataFREE-$$· ▲ 0

   [↗] visit altindex.com[alternatives]
6. 06.
   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.

   EquitiesResearchFREE· ▲ 0

   [↗] visit sharestructure.io[alternatives]
7. 07.
   Activ8 Insights— Tracks activist short seller reports, ranks investigators by verified stock impact, and provides forensic scoring on targeted companies with real-time alerts.

   EquitiesResearchFREE-$$$· ▲ 0

   [↗] visit activ8insights.com[alternatives]
8. 08.
   FOIAsearch.com— Searches SEC FOIA logs for requests on companies, highlighting B7A exemptions that indicate potential undisclosed SEC investigations.

   EquitiesResearchFREE-$· ▲ 0

   [↗] visit foiasearch.com[alternatives]
9. 09.
   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.

   EquitiesResearchFREE-$$· ▲ 0

   [↗] visit askedgar.io[alternatives]
10. 10.
    Quiver Quantitative— Aggregates alternative data on congressional trading, insider transactions, hedge fund activity, lobbying, government contracts, and corporate political contributions for equity research.

    EquitiesAlt DataFREE-$$· ▲ 0

    [↗] visit quiverquant.com[alternatives]
11. 11.
    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

    Private MarketsResearchFREE· ▲ 0

    [↗] visit valueaddvc.com[alternatives]
12. 12.
    Alva— Converts investment theses and market narratives into live playbooks with backtesting, automation, data APIs, and 24/7 agent execution

    Multi-assetAI AgentsFREE-$$· ▲ 0

    [↗] visit alva.ai[alternatives]
13. 13.
    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.

    Real EstateResearch$-$$$· ▲ 0

    [↗] visit homesage.ai[alternatives]
14. 14.
    IndexMundi— Aggregates global country statistics, economic indicators, and commodity data from sources like World Bank and USDA into searchable visualizations and comparative tools.

    CommoditiesMacro DataFREE· ▲ 0

    [↗] visit indexmundi.com[alternatives]
15. 15.
    Redfin Data Center— Provides downloadable CSV datasets covering US housing market metrics including prices, inventory, buyer/seller balance, luxury market activity, and financing trends

    Real EstateMacro DataFREE· ▲ 0

    [↗] visit redfin.com[alternatives]
16. 16.
    WhaleWisdom— Tracks institutional investor 13F filings, insider transactions, 13D/13G disclosures, and mutual fund holdings with backtesting and portfolio replication tools

    EquitiesResearchFREE-$$· ▲ 0

    [↗] visit whalewisdom.com[alternatives]
17. 17.
    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.

    EquitiesScreenersFREE· ▲ 0

    [↗] visit highshortinterest.com[alternatives]
18. 18.
    PricingPages.com— Catalogs screenshots and design patterns of SaaS pricing pages for product teams building or auditing their own pricing.

    Multi-assetAlt DataFREE· ▲ 0

    [↗] visit pricingpages.com[alternatives]
19. 19.
    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.

    EquitiesData & APIsFREE-CALL· ▲ 0

    [↗] visit unusualwhales.com[alternatives]
20. 20.
    Polyburg— Tracks real-time positions and performance of high-profit Polymarket wallets with AI-powered alerts and confidence scoring.

    Prediction MarketsAlt DataFREE-$$$· ▲ 0

    [↗] visit polyburg.com[alternatives]
21. 21.
    Wethr.net— Provides real-time weather observation data and model forecasts for trading weather derivatives on platforms like Kalshi and Polymarket

    Prediction MarketsAlt DataFREE-$$· ▲ 0

    [↗] visit wethr.net[alternatives]
22. 22.
    Job Radar— Tracking OpenAI, Anthropic & xAI career pages via their public APIs. No scraping required.

    Multi-assetAlt DataFREE· ▲ 0

    [↗] visit ailabjobs.lovable.app[alternatives]