Best Free Insider Data Tools for Investors

Stock Unlock

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Stock Unlock is a global stock and ETF research platform that combines stock scores, screeners, DCF tools, comparison charts, watchlists, and portfolio tracking. It is built for retail investors who want research and portfolio context together, with deeper history and broker links moving behind paid plans.

DATAROMA

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DATAROMA is a free, focused tracker for superinvestor 13F portfolios, recent portfolio changes, and insider buying activity. Use it for value-investing idea discovery and manager-following workflows, then verify timing, filings, and fundamentals before acting.

Marketgenius

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Marketgenius is a free, mobile-friendly stock heatmap and lightweight stock dashboard site for quick visual discovery. It focuses on major U.S. index heatmaps, superinvestor portfolio heatmaps, simple stock fundamentals, ownership stats, valuation metrics, dividend details, short interest, and basic scores. Use it as a fast visual starting point, not as a full screener, deep financial terminal, broker, API, or valuation platform.

EODHD

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EODHD is a market-data API provider for developers, quants, and analysts who need REST, WebSocket, spreadsheet, and AI-agent access to historical prices, fundamentals, calendars, news, sentiment, options, forex, crypto, and other financial datasets. It is strongest for API-first data workflows, but free usage is tiny, commercial licensing is separate, and some datasets require add-ons or marketplace plans.

Financial Modeling Prep (FMP)

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Financial Modeling Prep (FMP) is a market-data API and spreadsheet-data provider for developers, analysts, quants, and product builders who need equities, ETFs, funds, FX, crypto, commodities, macro, ESG, ownership, news, calendars, transcripts, and fundamentals from one vendor. It is strongest when you want REST and WebSocket access plus Excel and Google Sheets add-ins at a lower entry price than enterprise terminals. The main buying questions are plan limits, geography, history depth, and dataset access: the free Basic tier is a limited EOD sandbox, while real-time, global, transcript, 13F, holdings, intraday, and bulk workflows require paid tiers.

Alpha Vantage

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Alpha Vantage is an API-first financial data provider for developers, students, quants, and analysts who need a simple API key for stock, ETF, mutual fund, FX, crypto, options, commodities, fundamentals, news, sentiment, and macroeconomic datasets. It is strongest for learning, prototypes, spreadsheets, and personal API workflows, but the free quota is small, premium endpoints require membership, and commercial use needs separate licensing.

OpenInsider

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OpenInsider is a free, utilitarian SEC Form 4 insider-trading screener for investors who want to monitor insider buying, insider selling, cluster buys, and transaction reports without paying for a data terminal. It is useful for fast first-pass insider activity research, but the interface is table-heavy and there is no formal paid support, SLA, mobile app, or documented public API.

Fintel

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Fintel is a market-signal research platform for investors who want short interest, off-exchange volume, institutional ownership, insider trades, ETF exposure, options sentiment, filings, screeners, dashboards, alerts, APIs, and AI-assisted research in one place. It is strongest for ticker-level signal pages and ownership/short-interest workflows that help explain positioning, crowding, and unusual activity before deeper fundamental work. Many premium datasets, AI workflows, exports, options flow, and portfolio tools are tier-gated, and the signals should be treated as research inputs rather than investment recommendations.

Alpha Spread

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Alpha Spread is a value-investing research platform for investors who want quick intrinsic value estimates, DCF and relative valuation, stock reports, screeners, watchlists, alerts, analyst forecasts, and AI-assisted company questions. It is strongest for first-pass fair-value research, but free usage is metered weekly and automated valuation outputs should be reviewed as assumptions, not final investment decisions.

AUM 13F

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AUM 13F is a due-diligence web app for researching asset managers, institutional holdings, private funds, real estate managers, and limited-partner relationships from public filing sources. It is strongest for analysts who want a low-cost way to browse manager AUM, 13F holdings, EDGAR filings, IAPD records, CAFR-sourced LP portfolios, source links, portfolios, and alerts, but 13F data remains delayed and incomplete by design.

Delta by eToro

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Delta by eToro is a multi-asset portfolio tracker for stocks, ETFs, funds, crypto, NFTs, forex, commodities, indices, brokers, exchanges, and wallets. Use it when you want one read-only portfolio view across accounts and asset classes rather than another place to trade.

Monexa

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Monexa is a low-cost AI stock analysis workspace for investors who want screening, company dashboards, financial statements, DCF models, news, calendars, transcripts, SEC filings, analyst estimates, insider transactions, 13F Whale Tracker views, and congressional trading in one web app. Search intent is strongest around AI stock analysis, AI stock screeners, and whale tracking, so the copy should emphasize workflow depth without overstating the AI. Free access is useful but gated; Pro adds longer history, fuller transcripts, AI tools, saved models, exports, and deeper ownership views. Market data may be delayed, and AI output should be checked against filings, transcripts, and assumptions.

ORTEX

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ORTEX is a market-data and analytics platform best known for short interest, securities lending, options flow, and trading-signal context. It fits active investors, analysts, and data teams that need more than a basic quote page, with deeper web-app and API access moving behind paid tiers.

Quiver Quantitative

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Quiver Quantitative is an alternative-data platform for investors who want dashboards, screeners, alerts, backtests, and API access around political trading, insider activity, institutional holdings, lobbying, government contracts, patents, app data, ETF exposure, dark-pool activity, and related datasets. It is strongest when conventional fundamentals are not enough and users want differentiated public-disclosure signals. Web Premium and Quiver API are separate products with different prices, trials, dataset tiers, and commercial-use rules. Alternative data can be noisy and lagged, so it needs validation before being treated as a signal.

Stockcircle

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Stockcircle is a web app for following disclosed investor portfolios, guru transactions, insider trades, U.S. Congress trades, ETF holdings, valuation pages, screeners, alerts, and Pro-only AI earnings-call summaries. It is strongest for retail investors who want idea generation from reported holdings and public transaction disclosures without manually combing through filings. Pro unlocks fuller history, full screener access, instant notifications, stock picks, ad-free use, and AI summaries. The data is useful but inherently incomplete because SEC reporting rules do not require every holding or smaller transaction to be disclosed.

WhaleWisdom

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WhaleWisdom is a 13F, institutional ownership, insider, and hedge-fund holdings platform for investors who track filer activity, fund portfolios, watchlists, backtests, exports, and API workflows. It is useful for holdings research, but 13F data is delayed and the deeper history/API workflow is paid.

TipRanks

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TipRanks is an investment research platform built around analyst ratings, price targets, expert rankings, Smart Score, AI stock analysis, news sentiment, insider signals, hedge-fund activity, and portfolio tools. It is strongest for investors who want to compare market opinions and stock forecasts quickly, with Premium and Ultimate unlocking more of the expert, portfolio, export, and AI workflow.

SEC EDGAR - Company Filings (Full‑Text Search & Search Filings)

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SEC EDGAR Search is the official free source for U.S. public company, fund, insider, ownership, prospectus, and XBRL filing research. It is strongest as the source of truth for SEC filings, full-text search, latest filings, RSS feeds, CIK lookup, and data.sec.gov JSON APIs, but raw filings still require parsing and automated access must follow SEC fair-access rules.

Unusual Whales

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Unusual Whales is an options-flow and market-activity platform for traders who want real-time U.S. options trades, dark pool/off-exchange activity, alerts, screeners, news, congressional trading data, and developer API access. It is strongest for alert-driven options and order-flow research, with portfolio tracking, API, WebSocket streaming, and historical full-market options data handled through separate paid surfaces.

SecForm4.Com

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SecForm4.com is a U.S. insider trading and ownership monitoring site for Form 4, Forms 3 and 5, 13D/13G, and 13F filings from EDGAR. It fits users searching for SecForm4, insider trading trackers, Form 4 activity, and 13D/13G monitoring, with free public access and advanced ownership views for power users. The right use case is monitoring SEC filing signals before checking transaction context, issuer fundamentals, and current ownership. It is not a broker, global insider-disclosure database, portfolio tracker, public API, or standalone buy/sell signal.

13F Insight

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13F Insight is an SEC-filings intelligence platform for investors who want to track institutional 13F holdings, Form 4 insider trades, 13D/G ownership, watchlists, smart-money alerts, and AI answers grounded in filing citations. It is strongest for hedge-fund and institutional-ownership research, but 13F filings are delayed by design and AI summaries should be checked against the underlying SEC documents.

AlphaResearch

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AlphaResearch is an AI-powered stock research platform for searching filings, transcripts, press releases, reports, notes, fundamentals, estimates, news, insider transactions, institutional ownership, and fund holdings. It is useful for document-heavy research and collaboration, but global coverage and spreadsheet add-ins are Enterprise features and the premium trial requires a credit card.

Börsdata

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Börsdata is a Nordic-first equity analytics, screening, and data platform for investors who want long-history fundamentals, thousands of ratios, strategy screens, ownership data, insider and short-selling context, technical charts, reports, watchlists, calendars, and API or spreadsheet access. It is strongest for Nordic stock research, while global coverage, holdings data, Excel/Sheets workflows, and REST API access depend on paid tiers and professional users are routed to Enterprise.

Business Quant

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Business Quant is a U.S. equities research, screening, KPI, and financial-data platform for investors who want fundamentals, operating metrics, segment data, analyst estimates, ratings, warnings, 13F ownership, insider trades, exports, and API access. It is strongest for U.S. stock research where business-driver KPIs matter, but free KPI depth is shallow and serious API, export, history, and commercial-use workflows require paid plans.

CEO Watcher

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CEO Watcher is a U.S. insider-trading discovery and alert tool for investors who want Form 4 activity ranked by insiders’ historical forward returns. It is strongest for finding high-signal insider buys and sells, unusual activity, daily pre-market briefs, real-time paid notifications, and case-study style context, but insider trades are only one input and historical insider returns do not guarantee future performance.

CEO.CA

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CEO.CA is a Canadian small-cap investor community and market-data platform for traders and investors following TSX, TSXV, and CSE issuers. It is strongest for ticker chat rooms, watchlists, real-time news, SEDI insider filings, private placements, audience analytics, mobile access, and paid Level II market depth, but community posts are not research and Pro pricing depends on which Canadian exchanges you need.

Changeflow (Trackly)

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Changeflow, formerly reached through Trackly, is an AI website-change intelligence platform for monitoring filings, regulator pages, IR pages, competitor pages, PDFs, feeds, and other online sources. It is useful for investment and compliance teams that want relevant briefings rather than raw page diffs, but it is not market data, trade execution, or a substitute for human review.

ChartMill

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ChartMill is a browser-based stock screener, charting, ratings, alerts, and research platform for self-directed traders and investors screening U.S., Canadian, and European stocks and some ETFs. It is strongest for repeatable technical and fundamental screen workflows, swing-trading ideas, watchlists, alerts, market dashboards, ChartMill ratings, and strategy templates, but paid access does not turn it into a real-time broker or full portfolio accounting system.

EveryTicker

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EveryTicker is a free U.S. stock research platform focused on undercovered public companies, including microcaps, nanocaps, and OTC names. Use it for fundamental reports, AI and traditional screening, watchlists, 13F ownership context, and investment-theme discovery before doing deeper diligence.

FinancialData.Net

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FinancialData.Net is an API-first financial data platform for developers, analysts, spreadsheet users, and AI-agent builders who want broad market data, fundamentals, ownership, options, funds, ESG, calendars, news, Excel access, and MCP connectivity from one provider. It is strongest when breadth matters: stocks, ETFs, mutual funds, options, futures, crypto, forex, commodities, OTC securities, indices, filings-related datasets, and institutional/insider activity can sit behind one REST API. Serious use is paid, and compliance/security claims should be verified directly because the local profile does not include public audit reports.

FT Markets (Markets data - Financial Times)

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FT Markets is the Financial Times market-data portal for global equities, funds, ETFs, bonds, commodities, currencies, watchlists, portfolios, alerts, charts, and screeners. It is useful for readers who want credible market tools close to the FT news workflow rather than a standalone professional terminal. Free registration unlocks practical tracking tools, but deeper company data, director dealings, archive PDFs, and parts of the broader FT experience can require a subscription, and market data is delayed.

Gainify

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Gainify was an AI stock research and portfolio platform for global equities, combining screening, S&P Global-powered data, stock reports, valuation charts, AI analysis, earnings summaries, watchlists, portfolio tracking, investor activity, and insider/Congress trading signals. It should now be treated as a discontinued product: the canonical homepage says Gainify.io is closed and the service is no longer available. Use this profile for historical product research, comparison pages, and routing users toward live alternatives, not as a current signup recommendation.

Insider Monitor

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Insider Monitor is a free U.S. insider-trading reference site for tracking SEC Forms 3, 4, and 5 across insider purchases, sales, officer cluster buys, and top insider-buying lists. It is useful as a quick, no-login way to spot recent Form 4 activity and then jump back to the original SEC filing. Because insiders can report trades after the transaction date and the site does not advertise alerts, exports, or an API, it should be treated as a lightweight research prompt rather than a complete monitoring system.

Insider Screener

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Insider Screener is a global insider-trading research platform for investors who want to screen, track, export, and alert on director and insider transactions across multiple markets. It is more structured than a simple Form 4 list because it standardizes activity across jurisdictions, supports saved screens and tracked stocks on paid plans, and offers a separate REST API for insider transaction data. Use it as an insider-activity signal layer, not as a complete investment thesis, broker, portfolio accounting system, or unrestricted bulk-data feed.

MarketScreener

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MarketScreener is a broad global market news and stock research portal with quotes, watchlists, screeners, charts, calendars, analyst data, company financials, transcripts, ESG ratings, insider data, newsletters, and model portfolio content. It is useful for retail investors who want one content-heavy site for daily monitoring and global stock discovery. The tradeoff is tier gating: advanced screeners, reports, portfolios, decision-support tools, and some content require paid Access, Premium, or Expert subscriptions, with pricing that can vary by region and promotion.

MoatMap

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MoatMap is an AI stock screening and equity research tool with Quality, Value, and Momentum scoring, AI deep dives, insider-trade tracking, portfolio X-Ray, macro regime context, AI Top Picks, and investor-lens checks. It is attractive for fast idea validation and pay-as-you-go research, but premium usage depends on Feather credits and AI outputs still require investor review.

Nasdaq.com

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Nasdaq.com is Nasdaq's official investor portal for quotes, market news, screeners, calendars, filings, options chains, watchlists, and portfolio tools. It is strongest for investors who want exchange-branded market pages, earnings and dividend calendars, IPO context, ETF and fund screeners, company financials, insider and institutional ownership, and options-chain lookup without buying licensed exchange data products. Smart Portfolio Pro adds TipRanks-powered broker syncing and portfolio analytics. Nasdaq.com is not Nasdaq Data Link, a licensed exchange feed, a broker, or a professional market-data API.

OptionStrat

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OptionStrat is an options strategy builder, profit calculator, optimizer, and unusual-flow scanner for traders who want to model payoff diagrams, Greeks, event dates, saved strategies, alerts, and flow in one web and mobile workflow. It is strongest for options-specific research: comparing strategies, estimating probability of profit, scanning unusual contracts, and tracking trades visually. Free access uses delayed quotes and limited flow, while Live Tools and Live Flow unlock real-time builder features, broader flow, alerts, news, insider and Congress trades, and futures options flow. It is not a brokerage, broad portfolio system, or live-data product for professional users.

SentiSense

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SentiSense is a beta AI market-intelligence and data API platform for investors and developers who want stock data, sentiment, news clustering, social signals, institutional flows, insider trades, congressional trading disclosures, and AI-generated insights in one workflow. Search demand is small but commercially relevant around AI market intelligence and news sentiment APIs, so the copy should be precise about beta status, quota limits, and PRO-gated datasets. Use it as a signal layer for research, not as a broker or adviser.

Tickertape

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Tickertape is an India-first investing app for researching stocks, mutual funds, and ETFs, building screeners, tracking portfolios, and connecting broker accounts for a research-to-transaction workflow. It is strongest for Indian retail investors who want stock pages, analyst forecasts, Market Mood Index sentiment, portfolio alerts, corporate events, and broker-linked holdings in one web and mobile product. Free access covers the core experience, while Pro adds custom screens and filters, exports, historical MMI, advanced alerts, forecasts, premium screens, and multi-account portfolio features. It is not a raw market-data API or a full global institutional terminal.