Open Exchange Rates provides a simple, lightweight and portable JSON API with live and historical foreign exchange rates for more than 200...
Starting from $12.99/month
Best Frankfurter Alternatives ranked by AI · updated Aug 2026
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Frankfurter is a free, open-source currency-conversion service built around European Central Bank reference rates. It is aimed at developers and technically minded users who need a simple web interface or API for exchange-rate calculations.
Top 6 Frankfurter alternatives
Wise, formerly TransferWise, is a financial technology company that provides international money transfer services.
Varies
Exchange Rates API is a REST service for developers who need current and historical foreign-exchange rates in applications. It provides JSON responses,...
Pros
- Simple REST and JSON interface for common currency-conversion workflows
- Includes historical rates and time-series data
- Supports many currencies and multiple subscription tiers
Cons
- Free plan has a low request allowance compared with some competitors
- Several useful features require a paid plan
- Base-currency and update-frequency limits vary by plan
Free tier; paid plans from $14.99/mo
OANDA is a forex and CFD trading platform known for its powerful trading tools and competitive spreads.
Varies based on account type and trading volume
5
Valuta+
Valuta+
Valuta+ is a currency-converter app for travelers, shoppers, and people who work with multiple currencies. It provides quick conversions with support for...
Pros
- Faster for basic conversions than full-featured money-transfer apps
- Supports multiple currencies in a compact interface
- Useful for travel and everyday price comparisons
Cons
- Fewer international transfer features than Wise or Revolut
- Exchange-rate and offline capabilities may vary by platform
- Less suitable for business reporting than OANDA or XE
Freemium
CurrencyStack is a REST API for live, historical, and conversion-based foreign exchange data. It is designed for developers building financial, ecommerce, accounting,...
Pros
- Provides live and historical exchange-rate endpoints
- Returns data in a developer-friendly JSON format
- Supports currency conversion for international applications
Cons
- Less established than ExchangeRate-API or Open Exchange Rates
- Free-plan limits may be restrictive for production traffic
- Advanced data coverage and support are less documented than larger providers
Freemium, paid plans from $9.99/mo
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