Amazon Price Tracker vs Repricer: What Sellers Actually Need

Last updated: September 2026

Keepa shows you what prices have been. Repricer.com changes your price based on what they are right now.

That is the entire distinction. Price trackers are research tools. Repricers are action tools. The confusion between the two causes a specific and common mistake: sellers using Keepa as their pricing strategy by checking it daily, seeing the historical price range, and adjusting prices manually in response to what they find. This is using a research tool as an action tool. The gap between what that approach produces and what automated repricing produces is measurable.

TL;DR: Price trackers (Keepa, CamelCamelCamel) record what prices have been on Amazon listings. They do not change your prices, do not respond to competitive events, and do not connect to your seller account. A repricer monitors your live listings, detects competitive events, and submits price updates to Amazon within seconds. Any seller with competing FBA sellers on their listings needs a repricer. Price trackers are useful alongside a repricer for ceiling-setting and pre-sourcing research, but they are not a substitute for one.

What price trackers like Keepa and CamelCamelCamel are built for

Price trackers record the price history of Amazon listings. They show you what a product's price has been over time, when it changed, and by how much. They are designed for two audiences: buyers waiting for a product to hit a target price, and sellers researching a product's price history before making a sourcing decision.

Keepa (keepa.com) tracks Amazon prices, third-party seller prices, Best Seller Rank, review count, and availability history for almost every Amazon ASIN. The data goes back years on established listings. Sellers use it primarily for ASIN research (is this product selling consistently? at what price range?) and for ceiling-setting (what is the 90-day historical high this listing has sustained with Buy Box activity?).

CamelCamelCamel (camelcamelcamel.com) tracks Amazon and third-party seller prices with email alerts for price drops. It is primarily a consumer tool for buyers who want to purchase at the best price, and a quick research tool for sellers doing a simple price sanity check before sourcing.

What both tools do:

• Show historical price data for Amazon ASINs

• Alert users when prices reach a target level

• Display how prices have changed over a specified period

• Cover multiple Amazon marketplaces

What neither tool does:

• Change your listed price on Amazon

• Monitor your active listings for competitive events

• Submit price updates to Amazon via the Selling Partner API

• Connect to your seller account in any way

• Respond to the competitive environment in real time

This last point is the critical distinction. Price trackers are read-only tools. They observe. The Keepa vs CamelCamelCamel comparison covers the specific feature differences between the two trackers and when each is more useful for sellers.

What a repricer is built for and why it is a different category

A repricer monitors your live Amazon listings for competitive events, evaluates them against rules you configure, and submits price updates to Amazon within seconds. It does not show historical price data. It acts on current competitive conditions.

The workflow:

1. A competing FBA seller changes their price on a listing you reprice

2. Amazon's Simple Queue Service (SQS) feed notifies Repricer.com of the event

3. Repricer.com evaluates the event: is the competitor within your competitive set filter? Does the change warrant a response given your rule type?

4. If yes: calculates the new price within your floor and ceiling

5. Submits the new price to Amazon via the Selling Partner API

6. The price goes live on your listing

This cycle completes in under 90 seconds. On a competitive listing with 10 daily price events, a correctly configured repricer participates in all 10. A seller checking Keepa and adjusting manually participates in the 1 or 2 events they happen to check at.

What a repricer does not do:

A repricer does not show you price history. It does not tell you what a product's price was 30 days ago or what the BSR trend looks like. These are research inputs that come from Keepa, not from a repricer. The tools are complementary because each does what the other cannot.

The four questions that tell you which tool you need

Answer yes to any of these questions, and you need a repricer in addition to any price trackers you use.

Question 1: Are you actively selling on Amazon with other FBA sellers competing on your listings?

If you have 2 or more active FBA sellers on your same ASIN, competitive pricing events are firing on your listing multiple times per day. A price tracker shows you the aftermath of those events in the historical data. A repricer is in the competitive event as it happens. Without a repricer, you are unresponsive to the actual Buy Box competition occurring on your listings.

Question 2: Do you check competitor prices and adjust your prices manually more than twice per week?

If yes, you are doing the repricer's job manually. The time cost is significant: across 50 ASINs at 10 minutes per ASIN review, that is over 8 hours per week on a task automated repricing handles continuously. More importantly, manual checking introduces a lag between when a competitive event fires and when you respond. A repricer closes that lag from hours to seconds.

Question 3: Have you ever sold a unit at a price you later realised was below your break-even?

If yes, your minimum price is not correctly calculated from your actual cost inputs. The floor formula, (landed cost + FBA fee) divided by (1 minus referral fee rate minus target margin rate), produces the minimum price that protects a target margin percentage. A price tracker has no knowledge of your costs. A repricer with Net Margin Repricing calculates the floor from your live cost inputs and never goes below it regardless of competitive pressure.

Question 4: Have you noticed that your Buy Box win rate is lower than expected despite competitive pricing?

If yes, there is likely a response speed gap. Your price is competitive when you check it but above the competitive range during the hours you are not monitoring. A repricer maintains competitive positioning continuously, including overnight, during weekends, and during peak events when the Buy Box rotates most frequently.

Start your 14-day free trial with Safe Mode enabled. Run Repricer.com against your live listings for 7 days without changing any prices and see the simulated improvement in average selling price.

Using both: how price trackers and repricers work together

The most effective configuration for an active FBA seller uses Keepa for ASIN research and ceiling-setting, and Repricer.com for live competitive pricing execution. The two tools operate at different stages of the seller workflow and do not overlap.

Stage 1: Before sourcing (Keepa)

Before committing capital to a product, use Keepa to evaluate the ASIN:

• BSR trend over 90 days: is the product's sales velocity growing, stable, or declining?

• Price range over 90 days: what is the sustainable price range at which FBA sellers have held the Buy Box?

• Seller count over time: is the competitive set growing (increasing competition) or shrinking (more Buy Box opportunity)?

• Availability history: do competing sellers regularly stock out, creating thin-competition windows?

This research informs the sourcing decision before any inventory is purchased.

Stage 2: Before enabling repricing (Keepa for ceiling input)

After sourcing and listing, use Keepa to set the ceiling in Repricer.com. The 90-day Buy Box price historical high from Keepa is the correct ceiling: the highest price at which the listing has sustained competitive Buy Box activity. Set this as the maximum price in Repricer.com.

Stage 3: Live competitive pricing (Repricer.com)

Once the floor (from cost inputs) and ceiling (from Keepa research) are entered and Safe Mode has confirmed the configuration, Repricer.com handles live competitive pricing continuously. Keepa is no longer the active tool for pricing decisions. It returns as the research tool at each quarterly ceiling review, when the 90-day historical high has shifted.

Quarterly ceiling update:

Return to Keepa every 90 days per active repricing ASIN to update the ceiling. The 90-day window rolls forward. The ceiling from 3 months ago is often above or below the current high depending on seasonal patterns and competitive dynamics.

The common mistake: using a sourcing tool as a repricing strategy

The most common mistake in Amazon seller pricing is treating a price tracker as a repricing tool. The typical pattern: check Keepa or CamelCamelCamel every morning, see where competing prices are, manually update listings that seem out of range. This is a research cadence masquerading as a repricing strategy.

Why it fails:

It is backward-looking. Keepa shows you where prices were. By the time you see the chart, respond to what you found, and update your price, the competitive event that drove the change has already been resolved. Other sellers with automated repricing participated in that event window. You are repricing to where the market was, not to where it is.

It misses overnight events. The stock-out that happened at 11pm, the competitor price increase during the Saturday morning traffic surge, the Buy Box change during Prime Day's peak hour: all of these occur outside the manual checking window. A price tracker does not alert you in time to respond meaningfully. A repricer responds within 90 seconds regardless of when the event occurs.

It scales badly. At 20 ASINs, a daily Keepa check takes 30 to 60 minutes. At 100 ASINs, it takes a morning. At 300 ASINs, it is a full-time job that still misses most events. Repricing automation grows with the catalogue at no additional time cost.

It produces floor uncertainty. Manual pricing from Keepa history does not tell you whether your price is above or below your break-even. The historical price range tells you where competitors priced. It says nothing about whether those prices were profitable at your cost structure. The Amazon seller fees guide and the floor formula together produce the minimum price from your actual costs. Keepa data alone cannot.

The correct use of Keepa in a repricing workflow:

Keepa answers: what has this price been, and what is the historical range I should calibrate my ceiling to? That is its function in a repricing workflow. Once the ceiling is set in Repricer.com from Keepa data, Keepa's job in that workflow is complete until the next quarterly ceiling review.

Decision checklist: tracker, repricer, or both

Use only a price tracker if:

• You are researching whether to source a product (not yet listed)

• You are monitoring a product you do not currently sell to understand demand before entering

• You own a private label listing with no other FBA sellers on your ASIN (no competing offers means no competitive events to respond to)

• You are a brand owner monitoring the price range your authorised resellers are listing at

Use a repricer if:

• You are actively selling with 2+ FBA sellers competing on any of your listings

• You are spending more than 2 hours per week on manual price checking and adjustment

• Your Buy Box win rate is below the equal-share baseline (100 divided by number of active FBA sellers on the listing, multiplied by 1.5)

• You have experienced selling below your intended margin due to a floor set too low or not updated after FBA fee changes

Use both:

• You source new products regularly and need Keepa for ASIN research before committing capital

• You want to set ceilings from historical price data (Keepa) while running automated competitive pricing (Repricer.com) between floor and ceiling

• You reprice an active catalogue and want to review ceiling accuracy quarterly using Keepa's rolling 90-day data

For most active FBA sellers with competing offers: the correct setup is both. Keepa for research and ceiling inputs. Repricer.com for live competitive execution. The win rate benchmarks guide covers the specific win rate targets that indicate whether the repricing configuration is working correctly for your competitive density.

Key Takeaways

• Price trackers record what prices have been. Repricers change your prices based on what they are right now. These are different tools solving different problems.

• Any active FBA seller with competing sellers on their listings needs a repricer. Price trackers are useful research tools but cannot replace automated competitive pricing.

• The most common mistake is using Keepa daily as a manual repricing workflow. This is backward-looking, misses overnight events, scales poorly, and does not protect margin from floor miscalculation.

• The correct combined workflow: Keepa for pre-sourcing research and ceiling-setting, Repricer.com for live competitive pricing between the floor and ceiling.

• Safe Mode is the zero-risk way to test: run Repricer.com against your live listings for 7 days without changing any prices, then compare simulated average selling price to your actual ASP.

Action Plan

1. Identify whether you are using a price tracker as a repricing strategy. If you check Keepa or CamelCamelCamel daily and adjust prices manually based on what you find, you are using a research tool as an action tool.

2. Run the four-question test from Section 3. Any yes answer indicates a repricer is commercially appropriate for your current selling situation.

3. For each active repricing ASIN, pull the 90-day Buy Box price high from Keepa. This is the ceiling for Repricer.com. Write these down before setting up repricing.

4. Calculate the floor for each ASIN using (landed cost + FBA fee) divided by (1 minus referral fee rate minus target margin rate). This is the minimum price that protects your target margin. The 10-point repricing configuration audit verifies these inputs across your catalogue.

5. Start the 14-day Safe Mode trial. Enter ceilings from Keepa, floors from cost calculations, and rule types based on competitive density (match for 4+ FBA sellers, position-targeting for 2 to 4, ceiling-hunt for 1 to 2). Enable Safe Mode.

6. At Day 7, compare simulated ASP to actual ASP. If simulated is higher at comparable Buy Box share: go live. If not: review the configuration before enabling.

7. Keep Keepa for quarterly ceiling updates. Return to Keepa every 90 days per active repricing ASIN to check whether the 90-day historical high has shifted and update ceilings accordingly.

Frequently Asked Questions

1. Should I use a price tracker or a repricer?

For active FBA sellers with competing sellers on their listings: you need a repricer. Price trackers show historical price data but do not change your prices or respond to competitive events. The correct setup for most active FBA sellers is both: Keepa for ASIN research and ceiling-setting before and during repricing, and Repricer.com for live competitive pricing execution. If you are not yet listing products and are only researching whether to source something, a price tracker is sufficient for that research task.

2. What is the difference between Keepa and a repricer?

Keepa is a price tracking tool that records historical price data, Best Seller Rank, review count, and availability for Amazon ASINs. It shows you what prices have been. A repricer connects to your seller account via Amazon's Selling Partner API, monitors your active listings for competitive events, and automatically submits price updates in response. It changes what your price is right now. The two tools operate at different stages of the seller workflow and do not overlap in what they do.

3. Do I need a repricer if I already use CamelCamelCamel?

Yes, if you are actively selling with competing FBA sellers on your listings. CamelCamelCamel tracks price history and sends alerts when prices drop. It does not connect to your seller account, does not submit price changes to Amazon, and does not respond to competitive events. Checking CamelCamelCamel and manually updating prices in response is a manual repricing process. It misses events that happen outside your checking hours, scales poorly beyond a few dozen ASINs, and does not protect margin through a calculated floor. CamelCamelCamel is a useful research tool. For live competitive pricing, it is not a substitute for a repricer.

4. What does an Amazon repricer do that Keepa does not?

A repricer submits live price changes to Amazon in response to competitive events. Keepa records historical price data. Specifically, a repricer: monitors your listings for price events via Amazon's SQS feed, evaluates each event against your configured rules (floor, ceiling, competitive set filter, rule type), calculates the correct price response, submits it to Amazon within under 90 seconds of the event, and records the repricing action for analytics. Keepa does none of these things. Keepa tells you what happened in the past. A repricer acts on what is happening now.

Start your 14-day free trial and test how Repricer.com handles the competitive events on your listings. Safe Mode means no live prices change until you choose to go live. See how the Amazon Repricer compares to your current manual or tracked pricing approach.