Updated March 2026 · 7 min read
Best ExchangeRate-API Alternatives: Currency Conversion APIs for Developers in 2026
ExchangeRate-API is a popular choice for currency conversion, especially for developers looking for a simple, affordable solution. But depending on your needs — fresher data, better performance, different pricing models — there are several strong alternatives worth considering.
| API | Free Tier | Update Freq. | Response Time | Paid From |
|---|---|---|---|---|
| Strongwell Currency/FX | 1,000/month | 15 min | <200ms | $0.002/req |
| ExchangeRate-API | 1,500/month | Daily (free) | 200–500ms | $4.99/mo |
| Fixer.io | 100/month | Hourly (paid) | 300–800ms | $9.99/mo |
| Open Exchange Rates | 1,000/month | Hourly | 200–600ms | $12/mo |
| AbstractAPI Currency | 20,000/month | Daily | 300–700ms | $9/mo |
| Frankfurter | Unlimited | Daily (ECB) | 100–400ms | Free (open) |
Why Consider Alternatives?
ExchangeRate-API is solid for what it offers — simple API, decent free tier, affordable paid plans. But developers switch for several reasons:
- Daily-only updates on free tier — if you need hourly or sub-hourly rates, you must upgrade
- Fixed monthly pricing — pay-per-request models can be cheaper for variable-volume apps
- Performance — response times vary; some alternatives offer edge-deployed, consistently faster endpoints
- Historical data limitations — not all features available on lower-tier plans
1. Strongwell Currency/FX API — Fastest and Most Affordable
Strongwell's Currency/FX API was designed for developers who need fast, reliable exchange rate data without monthly subscription commitments. Built on Cloudflare Workers, it serves responses from the nearest edge location — meaning consistent sub-200ms response times whether your users are in São Paulo, Singapore, or San Francisco.
Rates update every 15 minutes across all tiers, including the free tier. This is a major differentiator: most competitors reserve fresh data for paid plans. The API supports 170+ currencies with any base currency, even on the free plan.
The pay-per-request model ($0.002/request) means you only pay for what you use. For an app making 10,000 requests/month, that's $20 — compared to ExchangeRate-API's $14.99/month plan (which includes features you might not need).
- Best for: Apps needing fresh data, globally distributed users, variable request volumes
- Try it: 1,000 free requests/month, no credit card required
2. Frankfurter — Best Free Open-Source Option
Frankfurter is a free, open-source currency API that sources data from the European Central Bank. It's completely free with no rate limits (within reason), making it ideal for learning, prototyping, and hobby projects.
The limitations are real: data updates once per day (ECB publishes weekday rates around 16:00 CET), it doesn't cover some exotic currencies, and there's no SLA. For production apps that need reliable uptime, you'll want a commercial alternative. But for many use cases, free and open is hard to argue with.
3. Open Exchange Rates — Best for Historical Data
Open Exchange Rates offers one of the deepest historical data sets in the industry, going back to 1999. If your application needs time-series data for charts, reports, or financial calculations, their historical endpoints are comprehensive and well-documented.
The free tier (1,000 requests/month, USD base only) is adequate for development. Paid plans start at $12/month for any base currency and historical access. The API is mature, well-documented, and has official libraries for most languages.
4. AbstractAPI Currency — Highest Free Volume
AbstractAPI offers 20,000 free requests per month — by far the most generous on this list. The data updates daily on the free tier, which is sufficient for many applications. Their API follows a simple key-based authentication model.
The tradeoff is that AbstractAPI's currency data is one product in their broader API platform, so the depth of currency-specific features (like time-series analysis or OHLC data) is limited compared to dedicated currency APIs.
5. Fixer.io — The Legacy Choice
Fixer.io remains widely recognized and has a large user base. If you're already using it and it works, there's no urgent reason to switch. However, new projects should evaluate alternatives — Fixer's free tier (100 requests/month, EUR base only) is the most restrictive on this list, and their pricing hasn't kept up with newer competitors.
Making the Right Choice
Our Recommendation
For production applications, Strongwell Currency/FX API offers the best combination of fresh data (15-minute updates), fast performance (edge-deployed), flexible pricing (pay-per-request), and a generous free tier. It's particularly strong for globally distributed applications where response time matters.
For hobby projects and prototypes, Frankfurter is free and sufficient. For deep historical data needs, Open Exchange Rates is the mature choice.
Try Strongwell Currency/FX API — Free
1,000 free requests/month. 170+ currencies. 15-minute updates. Any base currency.
Get Started Free →Pricing and features accurate as of early 2026. Always verify current rates with each provider.