Disclosure: Buy Box Checker is our own tool, and we have ranked it first because it is the only option built for location-level Buy Box monitoring. We have tried to be fair about where the other tools are faster, cheaper, or better integrated, and every price and feature below was re-checked against each vendor's own pages on September 4, 2026.
How we ranked: depth of Buy Box loss and suppression detection, alert speed, delivery channels, location coverage, free access to start, and overall value.
What changed at this refresh: Bindwise is gone. Both of its domains now redirect to FeedbackWhiz, and the free plan it was known for did not survive the move, so FeedbackWhiz Alerts takes that slot. SentryKit publishes Slack, Google Sheets, Zapier, and webhook delivery, so a limitation we listed for it no longer applies. We also corrected our own GetBuyBoxAlerts row: its pricing is public, and the delivery channels we credited it with appear only in a meta tag, not on the page. One reading is unresolved and flagged in place: SentryKit publishes a 14 day trial on one page and 30 days on another.
Want to see where you are losing the Buy Box, city by city?
Start freeQuick picks
- Location-level tracking: Buy Box Checker (the only tool with ZIP-code monitoring)
- Fastest detection: SentryKit (~90 seconds, off Amazon's push events)
- Most delivery options: SentryKit (email, Slack, Google Sheets, Zapier, webhooks), all named on its own pages
- Lowest entry price: GetBuyBoxAlerts and FeedbackWhiz Alerts both start at about $5/mo, but that buys 100 ASINs at GetBuyBoxAlerts against 5 products at FeedbackWhiz
- Free plan, not a trial: Buy Box Checker (dashboard on the Free plan). Every other tool here is a trial.
- Watches an ASIN you do not own: Buy Box Checker, which the Selling Partner API tools here cannot do
Amazon Buy Box monitoring tools, compared
| Tool | From | Free | Detection | Channels | Listing changes | By ZIP code |
|---|---|---|---|---|---|---|
| 1. Buy Box Checker | Free, paid from $29/mo | Yes (free plan, dashboard only) | Daily, per location | Email, Slack, Google Chat, Discord, webhook, daily digest | Yes, with before and after views | Yes |
| 2. SentryKit | From $19/mo | Free trial, no card | ~90 seconds (Amazon push) | Email, Slack, Google Sheets, Zapier, API and webhooks | Yes | No |
| 3. SellerSonar | From $19.98/mo (annual) | $0 5-ASIN trial, or $5 for 14 days full | Hourly to 4-hourly by tier | Email, in-app, Slack, webhooks | Yes | No |
| 4. FeedbackWhiz Alerts | From $5/mo (by product count) | 30-day trial, no free plan | Not published | Yes | No | |
| 5. GetBuyBoxAlerts | From $5/mo (100 ASINs) | 30-day trial, no card required | After 30 min of continuous loss | Email; messaging apps on higher tiers | Listing status only | No |
| 6. AmzMonitor | From $12/mo | 14-day trial, no card | Adjustable, 2 to 24 hours | Yes | No | |
| 7. eComEngine SellerPulse | From $89/mo | 30-day trial, card required | 24/7 (interval not published) | Email / in-app | Yes | No |
| 8. Helium 10 | From $99/mo annual ($129 monthly) | Free standalone tools | Not published | Not itemized publicly | Yes | No |
Pricing and features as of September 4, 2026, from each vendor's own pages, except GetBuyBoxAlerts, whose site declined our request on that date; its row reflects our July 2026 reading. Contact each vendor to confirm current plans.
Every tool below detects when you lose the Buy Box. Where they differ is speed, how they reach you, price, and whether they can show you the Buy Box by location. Here is the detail on each, in ranked order.
1. Buy Box CheckerOur pick for location-level monitoring
Visit siteFree, paid from $29/mo · Yes (free plan, dashboard only) · Best for: Sellers who sell nationally and need Buy Box status by region
Buy Box Checker is the only tool on this list that checks Buy Box ownership by ZIP code. Because Amazon awards the Featured Offer by delivery location, you can hold it in Seattle and lose it in Miami at the same moment, and a single national percentage hides that completely. Buy Box Checker monitors each ASIN across the specific ZIP codes you choose, compares delivery dates against the current winner, and sends a daily digest by email, Slack, Google Chat, Discord, or webhook when you lose the box or get suppressed in a region. It needs no Amazon account connection, so you can monitor any ASIN, your own or a competitor's, which the Selling Partner API tools on this list cannot do. It tracks the product page itself: titles, bullet points, images, brand name, category, and variations are snapshotted daily and every change is logged with a before and after view, so a hijacked byline or a quietly rewritten title gets caught the same day. Best Sellers Rank (BSR) is recorded on every check and charted over time, with category changes flagged so a recategorization never reads as a sales collapse. On paid plans the alert suite extends further: an unauthorized-seller hijacker alert (with an authorized-seller allowlist so approved resellers never trigger a false alarm), configurable sales-rank-drop alerts (you set the threshold per ASIN), and Amazon's Choice / Best Seller badge-change alerts so you know within a day when you win or lose a badge that is driving orders.
Strength: The only tool here with ZIP-code-level Buy Box monitoring, and it needs no Amazon account connection, so it can watch a competitor's ASIN as easily as your own, which the Selling Partner API tools here cannot. Paid plans add unauthorized-seller hijacker detection, configurable sales-rank-drop thresholds per ASIN, and Amazon's Choice / Best Seller badge-change alerts, alongside listing change tracking with before and after views and BSR trend charts.
Watch out: Checks run once per 24 hours per ASIN per location rather than sub-minute, so a tool built on Amazon's push events will tell you sooner. The Free plan is dashboard only: outbound alerts of every kind start on the paid plans. It focuses on monitoring rather than keyword research or PPC tooling.
2. SentryKit
Visit siteFrom $19/mo · Free trial, no card · Best for: The fastest alert on your own catalog
SentryKit has the fastest detection on this list, and it publishes how: Buy Box and pricing events arrive as SQS push notifications from Amazon rather than on a polling schedule, which its FAQ says fire within about 90 seconds of the change. It flags Buy Box Lost, Won, Suppressed, and Rotating events and adds context like the price gap and the competitor's fulfillment method. Since our July 2026 check it has widened delivery well beyond email: alerts now route to Slack, Google Sheets, Zapier, and your own endpoint through its API and webhooks. It connects through Amazon's official Selling Partner API, so monitoring covers the catalog in the Seller Central account you link.
Strength: About 90 second detection off Amazon's own push events, with rich Buy Box context, starting at $19/mo, and delivery into Slack, Sheets, Zapier, or your own endpoint.
Watch out: No SMS on any of its product pages, and no location-level view. The Selling Partner API connection means it watches your own catalog, not an arbitrary competitor ASIN. Note that its pricing page advertises a 14 day trial while its FAQ says 30 days, so confirm which applies before you plan around it.
3. SellerSonar
Visit siteFrom $19.98/mo (annual) · $0 5-ASIN trial, or $5 for 14 days full · Best for: An all-in-one alert suite with Slack and webhook support
SellerSonar bundles a Buy Box tracker with price, hijacker, review, and listing-change alerts. Check frequency improves as you move up the plans: every four hours on Pro, every two hours on Premium, hourly on Business and Enterprise. Annual pricing runs $19.98, $39.98, and $74.98 a month for those three tiers, with monthly billing about 20% higher. Slack and webhook delivery make it easy to route alerts into an existing workflow. Its pricing page offers a $0 option covering 5 ASINs and a $5 full-access trial for 14 days, but presents both as trials and lists no permanently free plan. SellerSonar also states it needs no Seller Central connection, so Buy Box Checker is not alone in that.
Strength: Broad monitoring suite (Buy Box plus price, hijacker, review, and listing) with Slack and webhooks, and a genuinely free 5-ASIN tier.
Watch out: The best check frequency sits on the upper tiers, and there is no location-level view.
4. FeedbackWhiz Alerts
Visit siteFrom $5/mo (by product count) · 30-day trial, no free plan · Best for: Buy Box alerts bundled with FeedbackWhiz's other tools
This slot used to belong to Bindwise, and that is worth spelling out, because Bindwise is where a lot of sellers first got free Buy Box alerts. Both bindwise.com and bindwise.threecolts.com now redirect to FeedbackWhiz, another Threecolts product, and the free plan did not survive the move. What replaced it is FW Alerts, which covers hijackers, Buy Box losses, and listing changes on Amazon, priced by how many products you watch: about $5 a month for 5 products, up to roughly $350 a month at 5,000 or more. There is a 30-day trial with full access, which during the trial covers up to 50 monitored products.
Strength: Joint lowest entry price on this list at around $5/mo, covering hijacker, Buy Box loss, and listing-change alerts in one place.
Watch out: Bindwise's free plan is gone: there is a trial but no permanent free tier. That $5 covers 5 products, where GetBuyBoxAlerts charges the same for 100 ASINs. No detection speed is published, its Alerts pages do not name specific delivery channels, and there is no location-level view.
5. GetBuyBoxAlerts
Visit siteFrom $5/mo (100 ASINs) · 30-day trial, no card required · Best for: Watching a large catalog cheaply
GetBuyBoxAlerts is a single-purpose tool priced purely by ASIN count, which makes a large catalog cheap to cover: Starter is $5 a month for 100 ASINs, Pro $10 for 500, and Scale $15 for 1,000, each with a 30-day trial that needs no card. Every tier fires only after a Buy Box loss has persisted for 30 minutes, which its pricing page states plainly and which cuts down on false alarms from brief rotations. Delivery is where the published detail thins out: Starter says "Alerts via Email", and Pro and Scale say "Alerts via Email or any other popular messaging app" without naming which. It monitors ASINs you authorize through Amazon's Selling Partner API, so like SentryKit it watches your own catalog rather than any ASIN you name, and it alerts on listing status (suppressed, blocked, or removed) rather than content changes.
Strength: Priced by ASIN count rather than order volume, so $15 a month covers 1,000 ASINs, plus a 30-minute continuous-loss rule that reduces false alarms.
Watch out: Pricing is not public, there is no location-level monitoring, and the Selling Partner API model limits it to your own authorized ASINs. Its site declined our September re-check, so treat this row as our July 2026 reading and confirm the current terms with the vendor.
6. AmzMonitor
Visit siteFrom $12/mo · 14-day trial, no card · Best for: Cheap no-frills monitoring you can tune
AmzMonitor covers Buy Box price-change and suppression alerts plus general listing monitoring, and lets you tune the check interval to every 2, 4, 8, 12, or 24 hours. Longer intervals buy you more monitored ASINs on the same plan. Tiers run from $12 a month at the entry level to $200 a month at the top, and the number of email recipients scales with them, from 1 to 20. The trial is 14 days with no card.
Strength: Low entry price for a full monitor, with a check interval you control and recipient counts that scale with the plan.
Watch out: Email-only delivery and no location-level view.
7. eComEngine SellerPulse
Visit siteFrom $89/mo · 30-day trial, card required · Best for: Larger FBA brands wanting a trusted legacy vendor
SellerPulse is the Buy Box product from eComEngine, a long-established Amazon software vendor. It alerts on Buy Box (Featured Offer) win/loss and explicit suppression events, and its alerts carry the other seller's name, the ASIN, the previous and updated offer including price, and the average seller rating. It also advertises listing change monitoring, described on its own site as detecting "suppressed listings, hijacker activity, and content changes". Pricing starts at $89 a month and scales by monthly order volume, and the 30-day trial asks for a card up front. It suits larger, operationally focused sellers who value a mature platform.
Strength: Trusted legacy brand with dedicated Buy Box and suppression alerting, and detail on who took the box.
Watch out: Highest entry price here, the check interval is not published, and there is no location-level monitoring.
8. Helium 10
Visit siteFrom $99/mo annual ($129 monthly) · Free standalone tools · Best for: Sellers who want Buy Box alerts inside a full suite
Helium 10 is the broad all-in-one suite, and its Alerts tool treats Buy Box Lost and Listing Suppressed as its two most critical events, alongside hijacking, title, product page, and price monitoring. Plans start at Platinum, $129 a month billed monthly or $99 a month billed annually, rising to Diamond and Enterprise. If you already pay for Helium 10 for research and operations, Buy Box alerting comes with it rather than costing you another subscription.
Strength: Buy Box and suppression alerts bundled into a full research and operations platform you may already be paying for.
Watch out: Buy Box is one feature among many at a suite-level price, with no location-level view. As of our September check Helium 10 does not publish the Alerts check interval, its delivery channels, or which tiers include it, and the free offering is a set of standalone tools rather than the Alerts tool.
How to choose the right one for you
- You sell nationally and suspect regional losses. You need location-level data, which only Buy Box Checker provides. A national percentage cannot tell you whether you are winning everywhere or dominating half the country and losing the rest.
- You want to watch competitors, not just your own listings. Buy Box Checker reads the public product page rather than connecting to a seller account, so you can monitor any ASIN. SentryKit and GetBuyBoxAlerts both connect through Amazon's Selling Partner API, which limits them to the catalog you authorize.
- You want the fastest possible alert. SentryKit will notify you soonest, about 90 seconds after the change, because it listens to Amazon's own push events instead of polling. That is a single national result, not a per-location one.
- You want alerts in a chat tool. SentryKit names Slack, Google Sheets, Zapier, and webhooks on its own pages, and Buy Box Checker delivers its daily digest to Slack, Discord, Google Chat, or any webhook. See how Buy Box alerts work to understand which channel fits your workflow.
- You want the lowest price. GetBuyBoxAlerts and FeedbackWhiz Alerts both start around $5/mo, though that is 100 ASINs against 5 products, and AmzMonitor is $12/mo for a full monitor. Buy Box Checker has a free plan you can stay on.
- You already pay for a full suite. Helium 10 covers Buy Box loss and suppression inside its Alerts tool, though it does not publish how often that tool checks.
New to the topic? Start with our guides on what the Amazon Buy Box is and how the Buy Box algorithm works.
Once an alert fires, work through our recovery checklist for a lost Buy Box to diagnose and fix the issue fast.
Frequently asked questions
What is the best Amazon Buy Box monitoring tool?
It depends on your priority. For location-level visibility, seeing where you win and lose the Buy Box by ZIP code, Buy Box Checker is the only tool here built for that. It also watches an ASIN you do not own, as does SellerSonar, which states it needs no Seller Central connection. For the fastest alert on your own catalog, SentryKit detects changes in about 90 seconds off Amazon's push events. For the most delivery options, SentryKit names email, Slack, Google Sheets, Zapier, and webhooks on its own pages. For the lowest price, GetBuyBoxAlerts and FeedbackWhiz Alerts both start around $5/mo, though that covers 100 ASINs at GetBuyBoxAlerts against 5 products at FeedbackWhiz, and AmzMonitor starts at $12/mo for a full monitor.
Why does the Amazon Buy Box need monitoring at all?
The Buy Box (Featured Offer) captures the large majority of Amazon sales, and Amazon can move it to a competitor or suppress it entirely at any time, often without any notice in Seller Central. Sellers frequently discover a loss days later, after sales have already dropped and ad spend has been wasted driving traffic to a listing they no longer own.
Can the Buy Box really be won or lost by location?
Yes. Delivery speed and inventory proximity are primary factors in the algorithm, so the same ASIN can have different Buy Box winners in different parts of the country at the same time. Seller Central reports one blended national percentage that hides this, which is the specific gap ZIP-level monitoring is built to close.
Do any of these tools track the Buy Box by ZIP code?
As of September 2026, only Buy Box Checker advertises ZIP-code and location-level Buy Box monitoring. Every other tool in this comparison monitors the Buy Box at the account or marketplace level only.
Which of these tools track listing content changes?
As of September 2026, SentryKit, SellerSonar, AmzMonitor, FeedbackWhiz Alerts, and Helium 10 all advertise some form of listing monitoring alongside Buy Box alerts. Buy Box Checker tracks titles, bullet points, images, brand name, category, and variations with a logged before and after view for every change, and pairs it with Best Sellers Rank (BSR) trend charts. SellerSonar also publishes BSR tracking, so check both if that pairing is what you are after.
Is there a free Amazon Buy Box monitoring tool?
One on this list has a permanently free plan rather than a trial. Buy Box Checker's Free plan shows Buy Box status and losses in the dashboard, with outbound alerts starting on the paid plans. SellerSonar publishes a $0 option covering 5 ASINs, but its pricing page presents that as a trial and lists no permanent free plan. Bindwise, which used to be the free option people named, has been folded into FeedbackWhiz and its free plan is gone. Everything else here is a 14 to 30 day trial, and GetBuyBoxAlerts is the one that asks for no card up front. A free plan is still the cheapest way to confirm a tool actually sees your Buy Box losses before you pay.
Do these tools need access to my Amazon Seller Central account?
Most of them do. SentryKit and GetBuyBoxAlerts both state that they connect through Amazon's official Selling Partner API, which means they monitor the catalog in the account you authorize. That is fine for watching your own listings and useless for watching anyone else's. Buy Box Checker reads the public product page instead of connecting to a seller account, so you can point it at any ASIN, including a competitor's.
See the Buy Box map your competitors cannot
Buy Box Checker shows you where you are winning and losing the Featured Offer, city by city. Start free; your card is never charged on the Free plan. Paid plans track the exact ZIP codes that matter to you and send a daily digest when you lose the box.
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