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CostMatch: Forex Execution Marketplace with Guaranteed Rate Lock

A browser plugin + API that integrates into traders' and business owners' workflows (Gmail, Wise dashboard, bank portal, accounting software). When a user initiates a forex transaction or receives a quote, the plugin auto-captures the quote details, instantly queries 6+ liquidity providers for better rates, and displays a side-by-side comparison with a 'lock-in' button. If the user finds a better rate, the plugin facilitates the execution and takes a commission on the spread savings.

PLUGIN

25 weeks • 70% confidence

Value Proposition

Eliminates the friction of manually shopping rates—users get real-time alternatives without leaving their current platform. Captures 0.2–0.5% of the transaction value by showing users cheaper execution venues they didn't know existed, and takes a cut of the savings.

Target Audience

Active forex traders using Wise, Remitly, or bank portals; international SMEs using accounting software (QuickBooks, Xero) for cross-border payments; corporate finance teams handling recurring international transfers

Key Features

  • One-click browser extension: detects forex quotes in Gmail, banking portals, Wise, Remitly
  • Real-time rate comparison: shows 6 alternative providers (Wise, OFX, LMAX, Saxo, Remitly, Revolut) with execution costs
  • Rate lock button: user clicks, plugin securely captures transaction details and locks in the rate for 30 minutes
  • And more, with full implementation detail...

Tech Stack

Chrome/Firefox extension APIs (manifest v3) Wise API, OFX API, LMAX API, Saxo API, Remitly API Node.js (rate-fetching microservice) React (popup UI, dashboard)
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Original Problem

Forex traders and international business owners struggle to understand hidden costs and execution mechanics in currency transactions

People conducting international payments or forex trading lack clarity on what actually happens during currency conversion—hidden spreads, slippage, execution delays, and opaque pricing from banks and brokers eat into their margins. Current solutions (banks, traditional forex brokers) don't provide transparent, real-time visibility into transaction mechanics, leaving users unable to optimize costs or predict final amounts received.

Score: 18.4% • 1 demand signal