VOL. XCIV, NO. 247
THE COMMUNITY-RANKED FREE INVESTING TOOL LEADERBOARD
Live community ranking · Top 50 free apis & data feeds tools
Best Free APIs & Data Feeds Tools for Investors
The free apis & data feeds platforms investors trust most, ranked by the people who actually use them.
Every tool here offers a genuine free tier, ranked by community votes and light editorial curation. We filtered 126 total apis & data feeds tools inside a directory of more than 369 investing platforms down to 99 free apis & data feeds platforms, so you can compare useful zero-cost options before moving into paid upgrades. Use this shortlist to compare pricing limits, platforms, and decision signals, then open any tool for the full breakdown.
Community-ranked · Free tiers only · Not financial advice
Top 10 Tools
- 1Top pick
Financial Modeling Prep provides API and spreadsheet access to market data, fundamentals, news, calendars, transcripts, ownership, and macroeconomic data. The free Basic tier is an end-of-day test plan. Real-time, global, transcript, 13F, intraday, and bulk access require paid plans. Display or redistribution requires a separate commercial agreement.
Best forMarket data APIFinancial data APIFundamentals dataHistorical market dataEarnings transcript researchWatch-outsFree sandbox is limitedGlobal and advanced datasets require higher tiers - 2
EODHD supplies market data through REST, WebSocket, spreadsheet, and agent interfaces. Datasets cover prices, fundamentals, calendars, news, sentiment, options, foreign exchange, and crypto. The free quota is 20 calls per day, commercial use requires a B2B plan, and some datasets are separate marketplace products.
Best forFinancial data APIHistorical market dataFundamentals dataOptions dataAI agent data accessWatch-outsCommercial use is separateFree API quota is very limited - 3
Diffchecker compares text, Word files, PDFs, Excel files, images, folders, and API responses. It is useful for spotting changes in filings, research drafts, models, contracts, or disclosures. It does not supply the financial data being compared.
Best forInvestment research workspaceResearch reportsAI research workspaceAI agent data accessWatch-outsNot finance-nativeFree tier is web-limited - 4
Open Payments is CMS's public database of payments, research funding, and ownership interests reported by drug and device companies and group purchasing organizations. It covers physicians, certain non-physician practitioners, and teaching hospitals. A published payment does not mean the relationship was improper.
Best forFinancial data APIMarket monitoringFundamental researchAI agent data accessWatch-outsAnnual publication cadenceHealthcare-specific scope - 5
OTC Markets provides public issuer pages, tiers, quotes, news, filings, screens, and licensed Level 1 and Level 2 products for OTC securities. It is useful for OTC research and feeds, not a global terminal, broker, or free redistribution source.
Best forStock screeningMarket data APIFinancial data APIMarket monitoringStock researchWatch-outsLicensed data is commercialOTC-specific universe - 6
Uncle Stock screens more than 100,000 global stocks with financial metrics, valuation models, scores, historical tests, watchlists, and alerts. Gold adds CSV export, a JSON API, and limited portfolio tracking. Free accounts can use the MCP server with daily limits. It is not a broker or an intraday trading simulator.
Best forGlobal stock screeningStock screeningStrategy backtestingFundamental researchFinancial data APIWatch-outsAPI is Gold-gated and cappedBacktesting is screener-oriented - 7
Perplexity Finance combines cited AI answers with stocks, ETFs, funds, crypto, options, news, charts, screens, earnings documents, ownership, government-trading views, and a finance_search tool. Answers still need verification, and consumer plans are billed separately from the API.
Best forAI research workspaceAI agent data accessStock researchFinancial data APIInvestment newsWatch-outsAI answer quality still needs reviewPlan and API billing differ - 8
Fiscal.ai combines a company-research terminal with REST, webhook, and MCP access. It covers financials, segments, KPIs, estimates, transcripts, filings, screens, valuation, ownership, fund letters, and AI-assisted research.
Best forAI research workspaceFundamental researchFinancial data APIAI agent data accessValuation modelingWatch-outsFree access is limitedMarket prices are not fully real-time - 9
OpenBB combines an open-source data layer with Workspace dashboards, AI research, agents, and team tools. It connects your providers and internal data rather than supplying production market data. An August 2026 founder update announced a move to open-source releases, with timing and hosted-product terms still pending.
Best forAI research workspaceInvestment research workspaceFinancial data APIAI agent data accessChartingWatch-outsDoes not provide production market dataCommunity Copilot is rate-limited - 10
Alpha Vantage is an API-first source for market and economic data. Developers, students, quants, and analysts can pull stocks, funds, FX, crypto, options, commodities, fundamentals, news, sentiment, and macro series with one key. The free quota is small, and commercial use needs separate licensing.
Best forMarket data APIFinancial data APIHistorical market dataOptions dataFundamentals dataWatch-outsCommercial usage requires separate licensingFree quota is small
- 11
Financial Filings provides public-company filings through a free web index, APIs and a hosted MCP server. It supports document search, Markdown extraction, standardized financials, webhooks and enterprise data delivery.
Best forFinancial data APIAI agent data accessMarket monitoringResearch reportsFundamental researchWatch-outsSelf-serve limitsFilings product, not full terminal - 12
PortfoliosLab offers portfolio backtesting, optimization, risk, correlations, screens, and AI-assisted workflows across stocks, ETFs, funds, crypto, and models. Paid plans add more history, imports, exports, and MCP access.
Best forPortfolio analyticsStrategy backtestingPortfolio trackingETF screeningStock screeningWatch-outsFree tier is smallNot brokerage accounting - 13
Ghostfolio is an open-source portfolio and wealth tracker with self-hosting, multiple accounts, net-worth dashboards, imports, charts, risk views, and a REST API. A free managed Basic plan offers hosting; Premium adds advanced analytics and professional market data. Self-hosting means handling deployment, security, backups, and updates yourself.
Best forPortfolio trackingPortfolio analyticsMarket data APILong-term portfolio trackingPortfolio watchlistsWatch-outsSelf-hosting has operational burdenPremium is a paid upgrade - 14
SentiSense is a beta AI market-intelligence and data API service for stock data, sentiment, news clusters, social signals, institutional flows, insider trades, congressional disclosures, and generated analysis. It supplies research signals, not brokerage or advice.
Best forAI research workspaceMarket monitoringFinancial data APIStock researchInsider and institutional trackingWatch-outsBeta product with plan limitsCoverage claims need caution - 15
SEC.gov EDGAR is the official free source for U.S. company, fund, insider, and 13F filings, with full-text search, RSS, bulk archives, and public JSON APIs. It is the validation source for filings research, not a polished commercial terminal.
Best forFinancial data APIFundamentals dataInsider and institutional trackingMarket monitoringResearch reportsWatch-outsFair-access limitsRaw source, not enrichment - 16
FRED is the Federal Reserve Bank of St. Louis' free macroeconomic database. Use its series, charts, release calendar, Excel tools, mobile apps, and REST API for inflation, rates, GDP, employment, FX, credit, and market indicators. It is macro context, not equity fundamentals or brokerage infrastructure; API access needs a free key.
Best forFinancial data APIHistorical market dataMarket monitoringAI agent data accessFundamental researchWatch-outsAPI key requiredTerms and copyright constraints apply - 17
MesoSim is an options backtesting service with low-code strategies, multi-leg simulations, risk graphs, Greeks, volatility surfaces, margin models, and paper or live workflow paths. It is options research, not general stock research or portfolio accounting.
Best forStrategy backtestingOptions dataPaper tradingQuant researchAI research workspaceWatch-outsOptions-specific scopeAPI requires Advanced or FundPro - 18
ORTEX combines short interest, securities lending, options flow, and trading-signal data for active investors, analysts, and data teams. Deeper web and API access sits behind paid tiers. It is a signal service, not a broker or portfolio ledger.
Best forOptions dataMarket monitoringQuant ratingsInsider and institutional trackingFinancial data APIWatch-outsBest data is paidOptions data has OPRA terms - 19
Quartr provides earnings calls, live transcripts, filings, reports, decks, estimates, AI chat, and investor-relations data. The app is useful for free call and transcript access; Pro and API serve professional research, MCP, webhooks, and integrations.
Best forEarnings transcript researchAI research workspaceFinancial data APIInvestment research workspaceResearch reportsWatch-outsPro and API are contact-sales productsQualitative research focus - 20
Portfolio123 combines stock and ETF screens, ranking systems, point-in-time backtests, portfolio tracking, broker links, DataMiner, and API access.
Best forQuant researchFactor screeningStrategy backtestingPortfolio trackingFinancial data APIWatch-outsAdvanced research is paidTrial access is temporary - 21
The European Central Bank's free portal provides euro-area statistics, policy rates, exchange rates, yield curves, macroeconomic series, metadata, and an SDMX API.
Best forFinancial data APIMarket data APIHistorical market dataMarket monitoringAI agent data accessWatch-outsECB and euro-area focusAccount needed for personalization - 22
Fintel brings short interest, off-exchange volume, institutional ownership, insider trades, ETF exposure, options sentiment, filings, screens, alerts, APIs, and AI research into ticker pages. It is useful for studying positioning and crowding before deeper fundamental work. Premium data, exports, options flow, AI, and portfolio tools depend on the plan, and the signals are inputs rather than recommendations.
Best forInsider and institutional trackingOptions dataStock screeningQuant ratingsAI research workspaceWatch-outsMany core workflows are paidBroker linking is U.S.-only - 23
The Office of Financial Research publishes U.S. Treasury financial-stability monitors, funding data, money-market transparency, bank risk views, and hedge-fund datasets in public JSON and CSV. It supports macro and market-structure research, not real-time trading, stock screens, or portfolio tracking.
Best forFinancial data APIMarket monitoringResearch reportsFundamental researchMarket data APIWatch-outsSystemic-risk scopeDocumented publication lags - 24
Quiver Quantitative provides dashboards, screens, alerts, backtests, and APIs for political trades, insiders, institutions, lobbying, government contracts, patents, apps, ETFs, dark pools, and other alternative data. Web Premium and Quiver API are separate products, and the signals can be noisy or delayed.
Best forInsider and institutional trackingInvestor holdings researchMarket data APIStrategy backtestingStock screeningWatch-outsPersonal plans restrict reuseU.S.-centric alternative data - 25
WhaleWisdom organizes institutional 13F, 13D/G, and other ownership filings into fund pages, holdings, changes, screens, alerts, and data exports. It is useful for studying disclosed institutional portfolios, but the filings are delayed and incomplete.
Best forInsider and institutional trackingInvestor holdings researchStock screeningStrategy backtestingFinancial data APIWatch-outsSEC filing lagFree tier is narrow - 26
GuruFocus combines global fundamentals, valuation, GF Score, GF Value, stock, ETF, and bond screens, backtests, guru and institutional holdings, insider trades, portfolios, spreadsheet add-ins, and APIs. It is built for fundamental and value research, not brokerage execution.
Best forStock researchStock screeningValuation modelingInvestor holdings researchStrategy backtestingWatch-outsPaid access is region and tier dependentAdvanced API access is separate - 27
Unusual Whales tracks options flow, dark pools, congressional trades, insider activity, market data, alerts, screeners, and social sentiment. It is built for active traders and alternative-data research, not a broker, portfolio ledger, or guarantee that unusual activity predicts returns.
Best forOptions flowOptions dataAlertsMarket monitoringFinancial data APIWatch-outsFree alerts are delayed and limitedAPI and WebSocket are separate paid products - 28
ETF Insider analyzes stocks, ETFs, and mutual-fund portfolios for holdings overlap, concentration, correlations, exposure, and efficient-frontier tradeoffs. Full holdings and Excel export require Pro; API and white-label access require Enterprise.
Best forETF screeningPortfolio analyticsPortfolio trackingFund researchFactor screeningWatch-outsNon-US coverage unclearFull holdings depth is paid - 29
Roic AI provides company financials, ratios, valuations, transcripts, news, stock screens, spreadsheet add-ins, a REST API, and an MCP server. Plans differ by request rate, financial and transcript history, and commercial-use rights.
Best forFinancial data APIFundamental researchAI research workspaceAI agent data accessEarnings transcript researchWatch-outsFree tier has rate and history limitsCommercial API use requires Enterprise - 30
Ahrefs gives investors a way to check the web demand around digital businesses, publishers, marketplaces, SaaS companies, and consumer brands. It measures search traffic, keywords, backlinks, and AI visibility. Those numbers are estimates, not company filings or a portfolio system.
Best forMarket monitoringFinancial data APIAI agent data accessResearch reportsAI research workspaceWatch-outsMarketing platform, not investing softwareCompetitor intelligence is paid - 31
Danelfin scores stocks and ETFs from 1 to 10 based on its estimate of three-month market outperformance. Use the score, rankings, screens, alerts, and API for idea generation. It is a signal layer, not a complete investment process.
Best forQuant ratingsAI research workspaceStock screeningETF screeningPortfolio alertsWatch-outsScores are end-of-dayAI score is not a complete investment process - 32
Firefly III is a free, open-source, self-hosted money manager for accounts, transactions, budgets, reports, imports, APIs, and automation. It fits personal-finance infrastructure rather than stock research. Users are responsible for hosting, security, backups, updates, and configuration.
Best forPortfolio trackingPortfolio analyticsLong-term portfolio trackingFinancial data APIWatch-outsSelf-hosting requiredNot an investment research platform - 33
Global Factor Data publishes equity factor returns, underlying portfolios, industry returns, reference files, and construction code. It covers 153 published factors across 93 countries and four regions. The data is for noncommercial research, not live trading.
Best forQuant researchHistorical market dataFactor screeningFinancial data APIResearch reportsWatch-outsNon-commercial data licenseResearch dataset, not live feed - 34
Listen Notes is a podcast search engine, API, alerts service, and dataset seller. Investors can search interviews, monitor keywords, and analyze podcast metadata as one research input. A podcast mention is not a verified financial disclosure.
Best forInvestment newsMarket monitoringFinancial data APIAI agent data accessResearch reportsWatch-outsPodcast data is indirectFree API is tiny - 35
MarketInOut screens stocks, ETFs, forex, and crypto with formulas, historical screens, strategy backtests, alerts, watchlists, portfolios, correlations, and one-time membership terms. It suits traders who want custom rules without a monthly SaaS bill. Free use is limited and there is no broker execution, sync, or automation.
Best forStock screeningTechnical screeningStrategy backtestingPortfolio alertsChartingWatch-outsFree access is limitedNo broker execution - 36
OpenMarket combines market charts, order-book heatmaps, footprints, watchlists, alerts, and custom kScript indicators in a web workspace. It covers crypto, stocks, futures, FX, metals, prediction markets, and economic data. Free charting and a separate Data API free tier are available; Plus adds higher limits and heavier order-flow tools.
Best forChartingTechnical analysisMarket monitoringPortfolio watchlistsAlertsWatch-outsFree chart limits are inconsistent across sourcesPlus gates deeper order-flow tools - 37
QuantConnect uses the open-source LEAN engine for research, backtesting, cloud deployment, broker connections, and live algorithmic trading. It is for technical Python and C# users building systematic strategies, not a simple charting app.
Best forQuant researchStrategy backtestingPaper tradingBroker-connected tradingOptions dataWatch-outsPlan and add-on complexityTechnical users only - 38
Sharesight records portfolios, dividends, performance, and tax reports across brokers and asset types. It is built for DIY investors, accountants, advisers, and family offices. It does not place trades or replace a tax professional for complex filings.
Best forPortfolio trackingPortfolio analyticsDividend analysisAdvisor client reportingPortfolio alertsWatch-outsFree plan is capped at 10 holdingsAdvanced reports require paid tiers - 39
Social Blade tracks public creator statistics across YouTube, Instagram, TikTok, Twitch, and Facebook. It can supply alternative data for creator, media, advertising, influencer, and platform research. Paid plans add history, reports, exports, and API credits. Social Blade does not sell private or personal platform data.
Best forMarket monitoringFinancial data APIMarket data APIResearch reportsInvestment newsWatch-outsEstimated public social metricsHistorical depth is plan-gated - 40
StockAlert Pro monitors stocks and ETFs through configurable alerts, watchlists, AI equity reports, and developer integrations. It covers price, technical, volume, fundamental, dividend, and scheduled conditions. It does not place trades or replace portfolio accounting.
Best forAlertsPortfolio watchlistsAI agent data accessFinancial data APIMarket monitoringWatch-outsAlert-first productFree-plan limits - 41
Tracefour provides free insider-trade heatmaps, filing email alerts, and a read-only API covering U.S. filings, selected European director dealings, and U.S. Congress disclosures.
Best forInsider and institutional trackingStock screeningMarket monitoringStock researchWatch-outsAPI request limitsAttribution and European source terms - 42
Visualping monitors web pages for changes with controls for frequency, thresholds, screen regions, selectors, wait times, proxies, and browser actions. It can support research and compliance monitoring, but it does not provide market data or trade execution.
Best forAlertsMarket monitoringAI agent data accessFinancial data APIInvestment newsWatch-outsNot market dataCredits and frequency gate scale - 43
TipRanks combines analyst ratings, targets, expert rankings, Smart Score, AI analysis, news sentiment, insider signals, hedge-fund activity, and portfolios. It is useful for comparing market views quickly, with Premium and Ultimate adding deeper expert, portfolio, export, and AI tools.
Best forAnalyst ratingsQuant ratingsStock researchPortfolio analyticsFinancial data APIWatch-outsBest tools are paidFree API and MCP quotas are small - 44
SEC EDGAR is the free public source for company, fund, insider, ownership, prospectus, and XBRL filings submitted to the SEC. It has full-text search, latest filings, RSS, CIK lookup, public JSON APIs, archives, and bulk files. Most filings still need parsing before comparison or analysis.
Best forStock researchFundamental researchFundamentals dataResearch reportsInsider and institutional trackingWatch-outsFair-access limits applyRaw filings require parsing - 45
QuantRocket is a Docker and Jupyter quant stack for research, backtesting, data, and live trading. It suits technical Python users who want local infrastructure, Interactive Brokers integration, point-in-time data, and CLI or API workflows.
Best forQuant researchStrategy backtestingPaper tradingBroker-connected tradingMarket data APIWatch-outsTechnical setup requiredFree tier is research-only - 46
Similarweb estimates web traffic, app usage, keywords, referrals, competitors, technologies, and online market share. It is alternative data for digital businesses, not reported financials. History, exports, APIs, integrations, and enterprise use are paid or custom.
Best forMarket monitoringFinancial data APIMarket data APIResearch reportsAI research workspaceWatch-outsModeled data, not reported financialsAPI and history are paid/custom - 47
Trading Economics provides indicators, calendars, forecasts, market data, company financials, news, ratings, and events through web, REST, WebSocket, spreadsheet, BI, and AI integrations. It is data infrastructure for dashboards and pipelines, not a broker or adviser. Plans control streaming, limits, and commercial rights.
Best forFinancial data APIMarket data APIHistorical market dataMarket monitoringAI agent data accessWatch-outsReal API use is paidRate and row limits apply - 48
The Wayback Machine lets researchers view archived versions of websites and files. It is useful for checking historical product pages, pricing, claims, and disclosures in diligence, but archives can be incomplete and it is not market data.
Best forResearch reportsAI agent data accessInvestment research workspaceWatch-outsCoverage is not guaranteedRate limits apply - 49
ApeWisdom tracks ticker mentions across Reddit, WallStreetBets-style forums, crypto communities, and 4chan /biz. It is useful for seeing where retail attention is moving. Mentions are noisy, so a leaderboard is not a view on value or price direction.
Best forMarket monitoringStock researchInvestment newsFinancial data APIPortfolio alertsWatch-outsSentiment is noisyCoverage is community-defined - 50
The Bank of England site is the primary free source for UK monetary-policy decisions, MPC minutes, Monetary Policy Reports, rates, exchange rates, statistics, and yield-curve files. It is a reference source for macro research, not a trading app. Some series arrive as downloads rather than through a complete API.
Best forMarket data APIFinancial data APIMarket monitoringHistorical market dataResearch reportsWatch-outsOfficial macro source onlyYield curves are file-based
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Curation & Accuracy
This directory blends AI‑assisted discovery with human curation. Entries are reviewed, edited, and organized with the goal of expanding coverage and sharpening quality over time. Your feedback helps steer improvements (because no single human can capture everything all at once).
Details change. Pricing, features, and availability may be incomplete or out of date. Treat listings as a starting point and verify on the provider’s site before making decisions. If you spot an error or a gap, send a quick note and I’ll adjust.