
ExchangeRate-API
Fixer.io
BankExchange
Currencyapi.com
Currencylayer
Exchangeratesapi.io
Freecurrencyapi.com
Free exchange rate API for developers. Real-time and historical currency data via REST API. 160+ currencies, simple integration, mid-market forex rates. Built for fintech, SaaS, and global apps.

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Which is more popular?
Based on our record, AllRatesToday seems to be more popular. It has been mentioned 3 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | allratestoday.com | open-gpt.app |
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| Company | Startup from the United Kingdom · 1 - 9 employees · 2025 | — |
| Listed in | — |
In their own words, as submitted to SaaSHub.


## AllRatesToday — Real-Time Exchange Rate API AllRatesToday is a developer-first currency data API delivering real-time, mid-market exchange rates for 160+ currencies. Rates are sourced from Reuters/Refinitiv and interbank feeds and updated continuously — accurate, unbiased pricing with no...
No description of https://open-gpt.app/ yet.
What each product offers, as listed by its team.


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As answered by people managing AllRatesToday and https://open-gpt.app/.
AllRatesToday's answer
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AllRatesToday's answer
Developers and product teams who need reliable foreign-exchange data: fintech and payment apps, SaaS platforms, e-commerce checkout and pricing, invoicing and accounting tools, travel and booking products, and any global application that displays prices or converts currencies. It suits both solo developers starting on the free tier and businesses scaling to high request volumes.
AllRatesToday's answer
AllRatesToday runs on Cloudflare Workers (serverless edge compute) with Workers KV for storage, written in TypeScript. It exposes a REST/JSON API with official SDKs for JavaScript/TypeScript, Python, and PHP. Exchange-rate data is sourced from Reuters/Refinitiv and interbank feeds. Billing is handled via Stripe and transactional email via Resend.
AllRatesToday's answer
AllRatesToday fetches live mid-market rates on every request rather than serving a once-a-day snapshot, so you always get current pricing. Rates come from Reuters/Refinitiv and interbank feeds, cover 160+ currencies with any base currency, and are delivered with very low latency from Cloudflare's global edge network. It pairs institutional-grade data with a developer-friendly REST API, official SDKs, and a genuinely usable free tier.
AllRatesToday's answer
Many currency APIs update only once or twice a day, lock real-time data behind expensive tiers, or have clunky integration. AllRatesToday gives real-time mid-market rates (no retail markup), simple bearer-token auth, CORS support, and clean JSON responses, plus official SDKs for JavaScript/TypeScript, Python, and PHP. Pricing is transparent and affordable — a perpetual free tier with no credit card, and paid plans from €4.99/month — backed by low-latency edge delivery.
AllRatesToday's answer
AllRatesToday was built by developers frustrated with exchange-rate APIs that refreshed only once a day, charged heavily for real-time access, or were awkward to integrate. By building on modern edge infrastructure, the team set out to offer accurate, real-time mid-market rates that are fast, simple to integrate, and affordable enough to start for free — making institutional-grade FX data accessible to any developer.
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Recommendations tracked on public social media and blogs since March 2021.


Under the hood it uses real-time mid-market rates from the AllRatesToday API — 160+ currencies, updated every 60 seconds, sourced from institutional interbank market data. - Source: dev.to / 5 months ago
The dataset is a mirror of a GitHub repository, AllRates-Today/central-bank-exchange-rates, which is itself fed by the collection pipeline behind AllRatesToday. A scheduled Action runs four times a day, pulls each institution's latest... - Source: dev.to / 11 days ago
Yes. AllRatesToday offers a permanent free tier with real-time mid-market rates, 160+ currencies, historical data, and no credit card required. It's the closest free equivalent for developers who don't need Oanda's trade execution... - Source: dev.to / 11 days ago
Tracking https://open-gpt.app/ since Jul 2023.
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