Best Insider Data Tools for Investing

SEC API (sec-api.io)

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SEC API is a commercial SEC/EDGAR API suite for developers, quants, compliance teams, and AI products that need fast filing search, real-time feeds, XBRL-to-JSON conversion, section extraction, insider filings, 13F data, and other structured regulatory datasets. It is strongest when you want production-ready normalized SEC data instead of building your own EDGAR ingestion stack, but the free tier is only a small starter allowance and redistribution requires enterprise terms.

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.

SEC.gov (EDGAR)

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SEC.gov EDGAR is the official free source for U.S. public-company filings, fund filings, insider forms, 13F reports, full-text filing search, RSS feeds, bulk archives, and no-key public JSON APIs. It is the baseline source for filings research and data validation, but it is raw official infrastructure rather than a polished commercial research terminal.

Simply Wall St

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Simply Wall St is a visual stock analysis and portfolio platform for long-term investors who prefer guided fundamental summaries over raw data tables. It is best known for its Snowflake-style company reports, global stock ideas, fair value views, dividend analysis, portfolio diagnostics, broker imports, and easy-to-scan visual research.

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.

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.

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.

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.

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.

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.

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.

Benzinga

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Benzinga is a market-news, trading-tools, and financial-data platform for active traders, investors, developers, and data buyers who need fast news, alerts, scanners, calendars, squawk, options activity, analyst actions, filings, transcripts, and APIs. It is strongest for event-driven monitoring and real-time workflow around Benzinga Pro or licensed feeds, but the useful trading features are paid, tiered, or add-on based, and the product is not a long-term portfolio accounting system.

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.

DATAROMA

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

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. It is useful when you want one read-only portfolio view across accounts and asset classes rather than another place to trade.

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. It supports fundamental reports, AI and traditional screening, watchlists, 13F ownership context, and investment-theme discovery before doing deeper diligence.

Financial Datasets

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Financial Datasets is a developer-focused financial data API and official MCP server for teams building AI agents, stock screeners, portfolio tools, research apps, and quantitative workflows. It is strongest when you need simple programmatic access to U.S. equity fundamentals, prices, SEC filings, insider trades, institutional ownership, news, crypto prices, and screener endpoints without assembling many separate data vendors. The tradeoff is scope and licensing: coverage is centered on U.S. public companies, there is no permanent free tier, and redistribution is gated to Scale.

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.

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 no public audit reports were identified.

FinancialReports.eu

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FinancialReports is a public-company filings database, filings API, and hosted MCP server for analysts, AI-agent builders, and data teams that need fast document ingestion, Markdown extraction, watchlist alerts, webhooks, and filing Q&A across global markets. It is strongest when the workflow starts with filings rather than price charts: company documents, insider trades, IPO references, filing feeds, and programmatic document access are the center of the product. The web index is free to browse, while serious API, MCP, webhook, redistribution, and production workflows are contact-sales.

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.

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 is discontinued: the canonical homepage says Gainify.io is closed and the service is no longer available. Historical product research and comparisons remain useful, but Gainify is not a current signup option.

GeminIQ

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GeminIQ is a browser-based U.S. public-company research platform built around as-filed SEC financial statements. It combines XBRL-traceable 10-K and 10-Q data with calculated metrics, interactive visualizations, reusable custom tables, stock screening, watchlists and comparable-company analysis, Form 4 insider transactions, institutional ownership monitoring, and post-earnings price-reaction views. It is strongest for filing-grounded fundamental research, but coverage is U.S.-focused and new filing data is available the next day rather than in real time.

HedgeFollow

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HedgeFollow is a web research platform for tracking hedge funds, institutional holders, insider trades, ETF activity, ownership flows, stock pages, fund pages, and portfolio-builder workflows from SEC filings. It is strongest when investors want a fast, visual way to follow 13F, 13D/13G, and Form 4 activity without paying for a larger terminal. The major caveat is timing: 13F holdings are structurally delayed by the SEC reporting process, so the data is useful for research and pattern recognition, not live portfolio mirroring.

InsideArbitrage

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InsideArbitrage is a paid event-driven investing research platform for merger arbitrage, insider transactions, spinoffs, buybacks, CVRs, tender offers, activist campaigns, and other special situations. It combines screens, trackers, calendars, deal updates, newsletters, and portfolio/watchlist workflows for investors who actively follow corporate events. It is not a broad fundamentals terminal, broker, portfolio accounting system, or public market-data API.

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. It serves as an insider-activity signal layer, not as a complete investment thesis, broker, portfolio accounting system, or unrestricted bulk-data feed.

InsiderScore (VerityData | InsiderScore)

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InsiderScore, now part of VerityData, is an institutional research and data product for insider transactions, buybacks, management changes, institutional holdings, Form 144, 10b5-1 disclosures, and related event feeds. It is built for professional research teams that need cleansed and contextualized event data, not a self-serve retail app, broker, or raw free SEC filing viewer.

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. It serves as a fast visual starting point, not as a full screener, deep financial terminal, broker, API, or valuation platform.

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.

MarketWatch

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MarketWatch is a Dow Jones financial-news and consumer market-data portal for stock market news, quote pages, watchlists, screeners, calendars, BigCharts, options chains, fund research, rates, newsletters, and paper trading through Virtual Stock Exchange. It is useful for retail investors who want mainstream market coverage and lightweight tools in one familiar site. Treat the subscription mainly as journalism access: market-data pages remain consumer-grade, exchange delays apply, and MarketWatch is not a broker, professional terminal, public API, or modeling platform.

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.

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. 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.

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.