Short answer: the Keepa extension injects an interactive price-history graph into every Amazon product page, and with a free account that graph shows the three price lines — Amazon’s own price, the lowest new third-party offer, and the lowest used offer — plus price-drop alerts. The lines sellers actually make sourcing decisions with — Sales Rank, Buy Box price, and offer counts — are reported by independent reviewers to require the paid Data subscription (€29/month or €290/year). That free-versus-paid boundary is the single most misreported fact about this extension, so this article walks the overlay element by element and labels every claim by where it comes from. One honesty note up front: Keepa’s own website could not be reached for direct verification on 2026-08-26 — it returned a bot-check error — so official-page facts below come from Keepa’s Chrome Web Store listing (checked 2026-08-26) and clearly labeled third-party sources.
Where the graph shows up, and what it costs to see it
Install the extension and open any product on a supported Amazon storefront, and Keepa renders its chart directly inside the product page, below the buy box area — no separate tab, no dashboard, no login prompt. Keepa’s Chrome Web Store listing (checked 2026-08-26) describes the core behavior as price history charts on product pages with the option to be alerted on price drops, and confirms the extension itself is free to install and use without creating an account.
The same listing puts the extension at 4,000,000 users, version 5.64, last updated 2026-08-23 — so it is actively maintained, not an abandoned scraper. The listing’s description names ten supported Amazon domains: .com, .co.uk, .de, .co.jp, .fr, .ca, .it, .es, .in and .mx. Amazon Australia, Brazil and the Netherlands are absent from that description — which means Keepa does not advertise them on its store listing, not necessarily that the extension is inert there; the extension’s own manifest requests permissions for those domains too, so treat availability outside the listed ten as unverified rather than ruled out.
Behind the overlay sits a large dataset rather than a live scrape: Keepa has tracked Amazon prices since 2011 and monitors billions of products, which is why a chart can show years of history the moment a page loads instead of starting to record from the day you installed it. Company background and the full feature rundown live on our Keepa tool page ; what matters for this article is that the overlay is a window into that historical database, and the extension itself is only the delivery mechanism.
Seeing the chart costs nothing. The question that decides whether you should pay is not “does the graph appear” but “which lines are drawn on it” — and that is where the free account and the Data subscription split.
The free chart: three price lines, alerts, and deals
With no account or a free account, the overlay’s graph carries the price history. Independent reviews that track Keepa closely — RevenueGeeks’ Keepa review, read 2026-08-26 — describe the free chart as showing three lines: the orange line for Amazon’s own price, the blue line for the lowest new third-party offer, and the black line for the lowest used offer. That matches what Keepa’s store listing promises for the free tier: interactive price history charts, price-drop alerts, and Lightning Deal notifications.
The chart is genuinely interactive rather than a static image. You can drag to zoom into a date window, hover to read exact prices on a given day, and switch the visible range with the tabs along the bottom of the graph. Viewing charts does not burn any usage quota — the metering Keepa applies to paid data requests does not apply to simply looking at graphs.
Beyond the graph, a free account adds tracking: set a target price on a product and Keepa notifies you when the price falls below it or when an out-of-stock item returns. It also exposes the Deals browser for scanning recent price drops, and cross-marketplace price comparison across the supported domains — useful if you source in one country and sell into Amazon Europe or another region.
Two properties of the free tier are worth stating plainly, because both get misdescribed. First, it is permanently free, not a time-limited trial — you do not enter a card, and the chart does not expire after fourteen days. Second, it works without registering at all: an account only becomes necessary when you want tracking alerts tied to you rather than to the browser session. Sources that describe Keepa’s free version as “a trial” are conflating it with the subscription’s separate feature set.
One limit worth knowing before you build a workflow on free tracking: multiple user reviews on Keepa’s Chrome Web Store from early 2026 report the free tracking allowance was cut to around 200 items. That figure comes from user reports, not an official announcement, but the complaints are consistent enough across languages to plan around. Casual price-watching will not notice; a reseller tracking a large watchlist will.
What the paid Data subscription adds to the same graph
Here is the boundary that AI-generated answers and older blog posts routinely get wrong. The seller-grade lines on the product-page graph are not free. Per RevenueGeeks’ review (read 2026-08-26), the Buy Box, Sales Rank, and offer-count lines require the paid Data subscription — the same €29/month plan, which Keepa sells as a single tier rather than a ladder of plans. Third-party chart guides describe the paid lines consistently: Sales Rank drawn in green, Buy Box price history in pink, and the new-offer count in purple, with per-line toggles on the right-hand side of the chart.
Why does that boundary matter so much? Because the free lines answer a shopper’s question — “is this a good price?” — while the paid lines answer a seller’s questions:
| Chart element | Question it answers | Free account | Data subscription |
|---|---|---|---|
| Amazon / New / Used price lines | Is this a good price today vs history? | Yes (third-party reports) | Yes |
| Sales Rank history | Does this product actually sell, and how often? | No (third-party reports) | Yes |
| Buy Box price history | What price wins the Buy Box over time? | No (third-party reports) | Yes |
| Offer-count history | Is competition on this listing rising or falling? | No (third-party reports) | Yes |
| Stock / variation data | How deep are competitors’ inventories? | No (third-party reports) | Yes |
Every “free account” cell above is labeled third-party because Keepa’s own pricing page could not be loaded on 2026-08-26; the pattern is corroborated across multiple independent guides, but if the boundary is deal-breaking for you, confirm it on keepa.com before subscribing.
A subscriber’s graph also gains inventory-adjacent data: reviewers report stock-level estimates and variation-level data as subscription features. If your sourcing decision hinges on rank velocity and Buy Box behavior — the standard online-arbitrage read — the free extension shows you the shape of the price history and nothing about demand. That is not a crippled trial; it is a deliberate split between shopper data and seller data.
It is also a structurally unusual split. Most seller tools gate features behind a ladder of plans, where each tier unlocks a longer feature list; Keepa instead sells exactly one subscription, and the decision it forces is binary. That design cuts both ways: there is no cheap middle tier that unlocks only Sales Rank for a casual flipper, but there is also no plan-comparison homework — either the seller lines are worth the single price to you or they are not.
What the subscription unlocks beyond the product page
The Data subscription is not only about extra chart lines. It switches on Keepa’s data-request features, which live outside the product-page overlay: Product Finder (filter Keepa’s product database by rank, price, category and dozens of other fields), Product Viewer and Best Sellers lists, data exports, and API access. These features run on a token-style quota that refills gradually each hour, per third-party documentation — heavy batch research can hit the ceiling, while graph viewing never draws from it.
If the API specifically is what you need, note that programmatic access is priced separately from the €29 personal subscription — token tiers start higher; see our Keepa API guide for how the token math works before budgeting. And if what you want is a walkthrough of reading the charts themselves — interpreting rank drops, spotting seasonal patterns — that tutorial already exists in our Keepa and CamelCamelCamel guide ; this article deliberately does not duplicate it.
On price: the subscription is €29/month or €290/year, billed in euros only — the Keepa pricing breakdown walks through every figure and where the stale €19 quotes come from. Older articles still quote €19/month — that was the pre-2026 price, not a second tier, and any source still citing it has not re-checked recently. Both figures circulating at once is exactly why AI answers about Keepa’s cost contradict each other. Our own verification chain: official page unreachable on 2026-08-26 (bot check), price corroborated via RevenueGeeks (read 2026-08-26) and consistent user reports from early 2026; the annual €290 figure rests on third-party listings only, so treat it as slightly softer than the monthly number.
Settings worth knowing before you judge the tool
Two mechanics change how useful the overlay feels, and both are free to use:
Per-line toggles. The colored circles on the right-hand side of the chart switch individual data series on and off — third-party chart guides describe toggling FBA-seller price markers and other series this way. If the graph looks unreadably busy, that is a settings problem, not a data problem; turn off the series you are not using. On a free account, the paid series simply are not there to toggle.
Date range. The range controls sit at the bottom of the graph. The default view can hide the story: a product that looks stable over three months may show a sawtooth of deep discounts over a year. Widening the range before judging a price takes one click and is the single highest-value habit for reading the overlay. For the full interpretation playbook — what a rank cliff means, how to read shaded regions — use the chart-reading guide rather than re-deriving it here.
The extension also surfaces its alert entry points directly on the product page, so setting a price watch does not require visiting keepa.com. Alert delivery channels include email and messaging integrations; the exact current channel list is a keepa.com settings-page detail we could not re-verify on 2026-08-26.
Four misreadings about the Keepa extension that keep showing up
Because Keepa’s own site is aggressively bot-walled, most of what the internet “knows” about the extension is second-hand — and four errors recur across blog posts and AI-generated answers alike:
“The free account shows Sales Rank.” The most consequential one. Every current independent source we checked on 2026-08-26 places Sales Rank on the paid side; answers claiming otherwise appear to generalize from the fact that the graph itself is free.
“Keepa costs €19/month” — or worse, “€19 and €29 are two tiers.” There is one subscription, and €19 is its historical price, not a lower tier. A guide quoting €19 in 2026 is republishing old research; we found exactly that on otherwise-useful chart tutorials during verification.
“The free version is a trial.” It is not time-limited and requires no payment method, per Keepa’s own store listing and consistent user reports. What ends after payment stops is subscription data access, not the chart.
“The extension supports eleven (or thirteen) Amazon marketplaces.” Keepa’s store description names ten domains. Its manifest requests access to three more, and older articles circulate other counts — but a permission request is not a support claim, and a missing listing entry is not proof of a dead marketplace. The defensible statement is the narrow one: ten domains advertised, anything further unverified.
The pattern behind all four is the same: when the primary source is hard to reach, stale numbers outlive their facts. It is also why every claim in this article carries its source and date instead of a bare assertion.
Is the free account enough?
Decide by which question you are asking the graph:
- You are a shopper or a casual price-watcher. The free extension is the whole product for you: price history on the page, alerts when your target hits, Deals browsing. Paying adds seller data you would not use.
- You are sourcing for resale. The lines you need — Sales Rank and Buy Box — are on the paid side of the wall, per every independent source we checked. Run the free version to learn the interface, but budget for the subscription the moment sourcing decisions depend on rank history.
- You need bulk or programmatic data. The subscription’s Product Finder covers filtered research; API work is a separate budget line (token tiers explained here ).
- You bounced off Keepa’s interface entirely. The graph-first, settings-dense presentation is not for everyone; the alternatives roundup covers tools that trade Keepa’s depth for readability, and the broader extension list maps what else fits in the same browser slot.
The extension earns its install either way: it costs nothing, renders where you already work, and even the free price lines beat sourcing blind. Just do not let an old blog post — or a confident AI answer — tell you the free account includes Sales Rank. As of the sources we could verify on 2026-08-26, it does not.