Keepa is unbeatable for Amazon price history charts and browser extensions. PriceFetch is better for real-time price data across multiple retailers via REST API.
Keepa and PriceFetch serve different primary audiences despite both dealing in price data. Keepa started as a browser extension that overlays price history charts on Amazon product pages. Over time, it added an API, but its core product remains the consumer-facing extension and the massive historical price database behind it.
PriceFetch is API-first. There is no browser extension, no consumer product. It is a REST endpoint designed for developers who need to programmatically fetch current prices from product URLs. The two products overlap in the Amazon pricing space but approach it from opposite directions.
Keepa's biggest strength is its historical price database. It has tracked Amazon prices for over a decade across every major Amazon marketplace. You can query price history for any ASIN and get daily data points going back years. This is invaluable for seeing seasonal pricing patterns, identifying price manipulation, or setting smart price alerts based on historical lows.
PriceFetch does not store historical data. Every API call triggers a live scrape and returns the current price. If you need historical trends, you will need to call PriceFetch on a schedule and store the results yourself. PriceFetch's strength is that the data is always fresh — there is no cache, no stale data, no lag between a price change and your API reflecting it.
For deal-tracking apps that need to show price history graphs, Keepa is the clear winner. For applications that need to know the price right now — comparison tools, real-time monitors, checkout flows — PriceFetch's approach makes more sense.
Keepa's API is centered around ASINs. You query by ASIN, not by URL. The response includes price history arrays, Buy Box data, sales rank history, rating history, and more. The data format uses Keepa's own time encoding (minutes since a reference date) which requires client-side conversion. It is powerful but has a learning curve.
PriceFetch takes a URL as input and returns a simple JSON object. There is no proprietary time format, no ASIN lookup step, no multi-dimensional price arrays to parse. If you have a product URL from any supported retailer, you can get the price in a single request.
# PriceFetch — URL in, price out
curl -H "X-API-Key: pf_live_abc123" \
"https://api.pricefetch.dev/v1/price?url=https://amazon.com/dp/B0TEST"
# Response
{
"success": true,
"data": {
"price": 29.99,
"currency": "USD",
"in_stock": true,
"retailer": "amazon"
}
}Keepa covers Amazon only — but it covers Amazon deeply. All major Amazon marketplaces, all product categories, with historical data for each. Keepa also tracks third-party seller prices, warehouse deals, and used item prices on Amazon.
PriceFetch covers Amazon plus Walmart, Target, eBay, Best Buy, Newegg, iHerb, and more. But it only returns the current price for each — no seller breakdowns, no used prices, no warehouse deals. The coverage is wide but shallow compared to Keepa's narrow but deep Amazon focus.
Keepa offers a free tier for its browser extension and basic API access with limited tokens. Paid plans start at around $19/month for API access. Keepa uses a token system where different types of queries consume different amounts of tokens — a product query might cost 1 token while a search query costs more.
PriceFetch gives 500 free credits on signup, then credit packs at a lower per-request rate. One credit equals one successful request regardless of the query type. The pricing model is simpler: every request costs the same amount.
For Amazon-only use cases with moderate volume, Keepa's pricing is competitive. For multi-retailer use cases, PriceFetch is the more economical choice since you would need additional APIs or scrapers to supplement Keepa's Amazon-only coverage.
Use Keepa if you need historical price charts, price drop alerts, or a browser extension for Amazon shopping. Use PriceFetch if you need a REST API that returns current prices from multiple retailers for your application.
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