30 days free, then $15/mo flat
unlimited ASINs · all marketplaces · all 20+ alerts
Start free — claim $15/mo flat →Keepa shows you years of price, sales-rank, and Buy Box history across 7 billion products — the best research tool in its category. SentryKit tells you the second something changes on your own listing today, with the seller profile and context a history chart can't attach. Add SentryKit alongside Keepa.
If what you actually want is the deepest price and sales-rank history for sourcing and research, Keepa already does that better than almost anyone — Keepa Pro at €29/month is a genuinely strong tool, and CamelCamelCamel is a solid free alternative if all you need is basic price history.
Neither is built to watch your own listings and tell you the moment something changes on them. That's a different job — and it's SentryKit's.
Keepa doesn't fail because it's a bad data platform — it's arguably the best one in its category. It's not built to alert you the instant something changes on your own listing. SentryKit is the layer beneath.
Keepa is a genuinely excellent product — tracking price, sales rank, offers, and Buy Box history across more than 7 billion products on 11 Amazon marketplaces, with a Pro data suite many other seller tools build on top of. That depth is real, and SentryKit doesn't try to replicate it.
What SentryKit does is different: connect directly to your Seller Central account and watch your own listings continuously, so a Buy Box loss, a hijacker with a seller profile attached, a suppressed listing, a stock-out, or a new review reaches you the moment it happens — not the next time you check a history chart.
Keepa and SentryKit aren't competing for the same question. Here's what each one actually answers, sourced from Keepa's Pro/data page and its separately-sold API pricing.
| Question | Keepa answers | SentryKit answers |
|---|---|---|
| How has this product's price moved over years? | Yes — the deepest price-history charts in the category. | No — that's Keepa's job, not ours. |
| Did a new seller take the Buy Box on my ASIN right now? | Historical — Buy Box seller history is tracked and viewable, but not pushed as a real-time alert on your own listing. | Yes — real time, with the seller's account age, feedback rating, and fulfillment channel. |
| Is a competitor's price dropping below mine? | Yes, manually — via a free price watch you configure per product, or a webhook alert on the separately-sold API. | Yes — automatically, every ASIN, with floor-breach context and ranked recovery options. |
| Did my listing get suppressed or removed from search? | Not in scope. | Yes — dedicated Search Suppression alert. |
| Did my FBA/FBM stock run low? | Offer and stock data tracked historically for research — not a threshold alert on your own inventory. | Yes — real-time stock alerts. |
| Did a new review post? | Rating/review count tracked as a historical data point — no per-review alert. | Yes — dedicated Latest Reviews and Top-Rated Reviews alerts. |
| How is it delivered? | Email & browser-extension notifications on free price watches; webhook alerts on the separately-sold API (from ~€49/mo). | Email, Slack & REST API/webhooks included on every plan — no separate product to buy. |
| Pricing | Free (basic) or Pro €29/mo for the data suite; API sold separately, from ~€49/mo. | Starter $19/mo · Pro $49/mo — unlimited ASINs, API included. 30-day free trial. |
As of August 2026, based on Keepa's own Pro/Data and API pages (keepa.com), cross-referenced against independent Keepa pricing trackers for the API token-tier figures. Pricing shown in EUR as published by Keepa; no currency conversion applied.
Every SentryKit event ships with the context your team needs to act correctly, on every plan — not just the top one. Two examples.
6:20 AM. You open Keepa to check a hot ASIN's price history. The graph shows a competitor undercut you by $6 — forty minutes ago.
With Keepa. The data is accurate and genuinely useful for understanding the trend — but it's a record of what already happened. There's no push alert tied to your own floor price, and nothing fires unless you're actively watching the chart.
With SentryKit. The alert fires the moment the undercut happens, with your floor-breach status and ranked recovery options attached — delivered to your inbox and Slack, on Starter, without opening a chart.
Keepa tells you the history. SentryKit tells you while it's still happening.
Keepa's Buy Box data is historical — you can look back and see who held it and when, but nothing pushes to you the moment a new seller takes it. SentryKit's Hijacker Detected alert fires in real time, with the seller's account age, feedback rating, and fulfillment channel attached.
Keepa's account-level webhook alerts live in its API offering, priced separately from Pro and starting around €49/month on top of the €29/month Pro subscription. SentryKit includes REST API and webhooks in its $19/month Starter plan — no second product to buy.
Keepa's strength is historical market data across the whole catalog, not operational alerts on your own account. SentryKit runs search suppression, FBA/FBM stock thresholds, and review alerts as dedicated, real-time event types.
Keepa's Pro data suite is €29/month, and its account-level API alerts are a separate product on top of that, starting around €49/month. SentryKit includes API and webhook delivery in the $19/month Starter plan — no second product to buy for alerts.
Both plans include the full 30-day free trial, no credit card. Keeping Keepa for sourcing and price research and adding SentryKit for real-time alerts on your own listings doesn't mean paying for overlapping coverage — they answer different questions.
Keepa isn't the only adjacent tool sellers weigh against SentryKit. These three come up often in the same evaluation.
Real Time Alerts · No Commitments · Advanced Insights
No. Keepa is a historical-data platform — Amazon's deepest price, sales-rank, and Buy Box history across more than 7 billion products, built for sourcing and pricing research. SentryKit is a real-time alerting platform for your own listings — Buy Box, hijacker, listing, inventory, and review events. Most sellers who use Keepa for research run SentryKit alongside it to watch their own ASINs in real time.
SentryKit sends a real-time alert the moment something changes on one of your own listings — a Buy Box loss, a hijacker with their account age, feedback rating, and fulfillment channel attached, a suppressed listing, low stock, or a new review — included on every plan starting at $19/month. Keepa's price-watch alerts are scoped to price changes you manually configure, and its webhook API alerts are a separate paid product on top of its €29/month Pro subscription.
Yes, and this is the most common way sellers use both. Keepa answers “what has this product's price and rank done over time, and who else sells it” — questions worth asking before you source or price a product. SentryKit answers “is something happening on my listing right now.” They sit at different layers: Keepa is the research layer, SentryKit is the real-time alerting layer on top of your own account.
SentryKit alerts fire in real time, the moment Amazon's state changes on your listing, connected directly through your Seller Central account. Keepa's free price watches are notification-based on price changes you configure per product, and its deeper Buy Box and offer data is historical — built for looking back, not for catching something the instant it happens.
Keepa Pro is €29/month for its full data suite (Product Finder, Buy Box Statistics, Inventory Tracking, and more); its API with webhook alerts is priced separately, starting around €49/month. SentryKit is $19/month for Starter or $49/month for Pro, with REST API and webhooks included at every tier, and a 30-day free trial. The two aren't really substitutes for each other — Keepa's pricing is for data access, SentryKit's is for real-time protection.
Not quite. Keepa tracks Buy Box seller history as historical data — you can look back and see who held the Buy Box and when. It doesn't push a real-time alert with the new seller's account age, feedback rating, or fulfillment channel the moment they take your Buy Box, the way SentryKit's Hijacker Detected alert does. Keepa's data is excellent for research after the fact; SentryKit is built for the moment it happens.
Start a 30-day free trial at live.sentrykit.com/signup — no credit card required. SentryKit connects to your Seller Central account independently of Keepa, so you can keep using Keepa for sourcing and price research and add SentryKit specifically for real-time alerts on your own Buy Box, hijacker, listing, inventory, and review events.
