Software Alternatives & Startups

FXProof VS ExchangeRate-API

Compare FXProof VS ExchangeRate-API and see what are their differences

FXProof logo FXProof

Keep a signed, verifiable record of the official exchange rate used in an invoice, expense, accounting entry, tax file, or review.

ExchangeRate-API logo ExchangeRate-API

An easy to use, free & reliable Exchange Rate API trusted by tens of thousands of developers since 2010!
  • FXProof Main page
    Main page //
    2026-08-02
  • FXProof Proof samples page
    Proof samples page //
    2026-08-02
  • FXProof Check a proof
    Check a proof //
    2026-08-02

FXProof is a B2B SaaS for creating signed, verifiable proof documents from official exchange-rate data.

For each supported dataset and date, FXProof keeps the official source, rate context, document ID, payload hash, digital signature, and public verification path together in a reusable proof bundle. The resulting PDF can be stored with an invoice, expense, accounting entry, tax file, audit workpaper, or internal-control record, so the exchange rate can be reviewed later without rebuilding the evidence trail.

Supported official sources currently include the European Central Bank, HMRC, the Federal Reserve System, the Bank of Canada, and the National Bank of Kazakhstan.

Key capabilities include:

  • Signed exchange-rate proof PDFs
  • Public verification using the document ID and payload hash
  • Current and historical official exchange-rate datasets
  • Reusable proof bundles
  • Source attribution and verification metadata
  • Dataset-first API for workflow automation
  • Free Basic plan for occasional proof needs

Users can inspect public proof samples, verify supported documents without an account, retrieve ready proof bundles through the web application, and automate supported workflows through the API.

FXProof does not provide currency exchange, payment, money-transfer, trading, investment, legal, tax, or accounting services. Official institutions remain the sources of the underlying reference rates; FXProof provides the proof document and evidence workflow around those data.

  • ExchangeRate-API Landing page
    Landing page //
    2020-05-18

ExchangeRate-API.com offers an easy-to-use JSON currency conversion API with unlimited free requests. The service supports all 160 major currency codes and an incredibly accessible API request format. ExchangeRate-API has been a popular option for developers to get exchange rate data since 2010!

FXProof

$ Details
freemium €59 / Monthly (Pro)
Platforms
SaaS Web REST API
Release Date
2026 July
Startup details
Country
Kazakhstan
State
Astana
City
Astana
Founder(s)
Igor Lepekhin
Employees
1 - 9

ExchangeRate-API

$ Details
freemium $10 / Monthly (Pro)
Platforms
REST API
Release Date
-

FXProof features and specs

  • Signed Proof Documents
    Digitally signed PDF proof documents based on official exchange-rate data.
  • Public Verification
    Verify a proof using its document ID and payload hash without signing in.
  • Official Rate Sources
    Supports the ECB, HMRC, Federal Reserve, Bank of Canada, and National Bank of Kazakhstan.
  • Current and Historical Rates
    Create proof records for supported current and historical exchange-rate datasets.
  • Reusable Proof Bundles
    Reopen and download previously accessed proof bundles without recreating the evidence.
  • Source Attribution
    Preserves the official source, dataset, rate date, and supporting reference information.
  • Verification Metadata
    Includes the document ID, payload hash, signature status, and verification details.
  • REST API
    Automate rate retrieval, proof-bundle access, and document verification through the API.
  • Web Application
    Search for supported datasets, select a date, and retrieve ready proof documents in a browser.

ExchangeRate-API features and specs

  • Free Trial
    100% free forever basic plan
  • Easy to Set-up and use
    Instant start & easy API request formats

Category Popularity

0-100% (relative to FXProof and ExchangeRate-API)
Compliance
100 100%
0% 0
APIs
12 12%
88% 88
Finance
13 13%
87% 87
Auditing And Compliance
100 100%
0% 0

Questions & Answers

As answered by people managing FXProof and ExchangeRate-API.

How would you describe the primary audience of your product?

FXProof's answer

FXProof is intended for:

  • Accounting and finance teams
  • Bookkeepers and accounting practices
  • Tax advisers and tax-preparation teams
  • Auditors
  • Compliance and internal-control teams
  • Small businesses with international transactions
  • Freelancers and independent consultants
  • Fintech and accounting software providers
  • Developers automating exchange-rate evidence workflows

The common requirement is a repeatable way to document and later verify the official exchange rate used in an invoice, expense, accounting entry, tax file, audit workpaper, or internal review.

What's the story behind your product?

FXProof's answer

FXProof was created to solve a practical evidence problem. Official exchange rates are usually available, but businesses often have to collect the supporting evidence manually by saving webpages, copying values into spreadsheets, taking screenshots, or rebuilding the source trail months later.

These methods are difficult to reproduce and can leave a weak audit trail. FXProof was designed to connect the official source, date, exchange-rate context, signed PDF, document ID, payload hash, and verification process in one consistent workflow. The goal is to make an exchange-rate record easier to store, explain, share, and verify when it is reviewed later.

What makes your product unique?

FXProof's answer

FXProof does not simply provide an exchange rate. It creates a signed, verifiable proof document that preserves the official source, dataset, date, document ID, payload hash, signature status, and verification details in one reusable evidence bundle. A recipient can later verify the proof through a public verification page. This makes FXProof suitable for accounting, tax, audit, compliance, internal-control, and dispute-review records where the rate must remain explainable and verifiable over time.

Why should a person choose your product over its competitors?

FXProof's answer

Most exchange-rate services focus on displaying rates, converting currencies, or providing raw API data. FXProof is designed for situations where a business must document which official rate was used and provide evidence that can be reviewed later.

Users receive a signed proof PDF, source attribution, verification metadata, and a public verification path. Previously accessed proof bundles can be reused and downloaded again, while the API allows the same evidence workflow to be automated. FXProof is therefore a better fit when the required result is not merely a rate, but a verifiable business record.

Who are some of the biggest customers of your product?

FXProof's answer

FXProof does not currently publish customer names. As a recently launched service, it will only identify customers publicly after receiving their permission.

User comments

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What are some alternatives?

When comparing FXProof and ExchangeRate-API, you can also consider the following products

Open Exchange Rates - Free, hourly-updated exchange rates - a simple, accurate, open-source JSON API. Free for personal use, a bargain for everybody else.

Fixer.io - Fixer provides a free, simple, and lightweight API for current and historical foreign exchange rates and currency conversion. The API tracks rates published daily by the European Central Bank.

Exchangeratesapi.io - Simple API for Global Currency Exchange Rates

Currencylayer - Free and startup-friendly currency converter JSON API for real-time and historical exchange rates - reliable and accurate, supporting 168 world currencies.

Currencyapi.com - Currencyapi.com is a free, reliable & feature complete currency exchange rates API. 170+ world currencies & 60 second update rate.

FXPing.co - Live exchange rates for 150+ currencies with a built-in FX margin calculator. Convert instantly and export to CSV, JSON or PDF.