Best Free Yield Curves Tools for Investors

Koyfin

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Koyfin is a modern web and mobile financial terminal for investors, analysts, and advisors who want dashboards, charts, screeners, portfolios, news, alerts, transcripts, and market data without using a traditional desktop terminal. It is strongest for building custom research workspaces across equities, ETFs, funds, macro data, FX, commodities, crypto, yield curves, and advisor reporting. Free access is useful for trialing the workflow, while paid and Advisor tiers unlock more dashboards, screens, history, alerts, reporting, integrations, and client-portfolio features. It does not offer a public API.

TradingView

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TradingView is a chart-first market analysis platform for traders who want powerful charts, screeners, alerts, Pine Script, paper trading, and broker-connected trading across many asset classes. It is strongest when technical analysis, custom indicators, strategy testing, watchlists, and real-time market monitoring are part of the same workflow. The free Basic plan is useful for trying the product, but active users usually run into limits on charts, indicators, alerts, watchlists, and historical bars. Some real-time exchange data is sold separately.

ECB Data Portal

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ECB Data Portal is the official free European Central Bank source for ECB statistics, euro area macro data, interest rates, exchange rates, yield curves, downloads, charts, and SDMX API access. Use it when you need primary-source European macro data rather than a commercial terminal summary.

OpenBB

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OpenBB combines an open-source financial data layer with a hosted Workspace for dashboards, AI research, custom agents, and team workflows. It is best for analysts, quants, developers, and firms that want to connect their own market data, internal datasets, provider API keys, widgets, MCP tools, and AI workflows instead of buying a closed terminal. Community access is useful for individuals, while Pro adds collaboration, exports, Excel, RBAC, SSO, MFA, and private deployment options. OpenBB does not provide production market data itself; it orchestrates connectors, your data, and your vendor access.

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.

Office of Financial Research (U.S. Treasury)

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Office of Financial Research is a free U.S. Treasury source for official financial-stability monitors, stress indicators, short-term funding data, money-market fund transparency, bank systemic-risk views, and hedge-fund monitor datasets. It is useful for macro, risk, policy, and market-structure research where documented methodology and public JSON or CSV access matter more than a polished investing app. OFR data is generally monitor-specific and often end-of-day or lagged. It is not a real-time market-data feed, stock research terminal, broker, portfolio tracker, or broad trading dataset.

Federal Reserve Board (FRB.gov)

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Federal Reserve Board (FRB.gov) is the official U.S. central-bank source for policy materials, FOMC calendars, statistical releases, interest rates, balance sheet data, bank data, FX rates, industrial production, and Data Download Program files. Use it as a primary macro source, not a commercial investing terminal.

Bank of England

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The Bank of England website is the official free source for UK monetary policy decisions, Bank Rate context, MPC calendars and minutes, Monetary Policy Reports, statistics, exchange-rate and interest-rate series, and UK yield-curve downloads. It is strongest as a primary-source macro and rates reference for analysts, students, investors, and developers, but it is not an investing app and some datasets, including yield curves, are delivered as files rather than a full API.

European Central Bank (ECB) — Statistics & Data

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European Central Bank Statistics & Data is the official ECB source for euro-area statistics, policy rates, FX reference rates, yield curves, inflation, macro indicators, downloads, and SDMX API access. Use it when you need primary-source European macro and rates data rather than investment-app commentary.