Marter vs Keepa: Walmart Seller Stack vs Amazon Price Tracker
Honest comparison for sellers researching products on Walmart Marketplace in 2026.
By Ido Friedman • Last updated May 17, 2026
Quick Verdict
Keepa is the gold standard for Amazon price history. Marter is the gold standard for Walmart product research — profit calculation, sales estimations, seller tracking, and historical data. They don't track the same marketplace, so they aren't direct substitutes. The closest Walmart equivalent to Keepa's pure price-history charting is Histomart (also Walmart-only). Most Walmart sellers run Marter for the full sourcing workflow and add Histomart when they want dedicated historical price charts.
If you've landed here searching "Keepa for Walmart" or "Marter vs Keepa," you're almost certainly an Amazon seller eyeing Walmart Marketplace — or a new Walmart seller wondering whether the famous Amazon tool will work for your marketplace too. The short answer is no: Keepa is Amazon-exclusive and isn't expanding. The longer answer is that the workflow Keepa enables for Amazon sellers (price history → competition analysis → buy decision) is exactly what Marter enables for Walmart sellers, just with different infrastructure under the hood. Below is a full side-by-side so you can decide which marketplace you're actually optimizing for and which stack fits.
Marter
Walmart product research, profit calculator, sales estimations, seller tracking, and historical data — single plan, all features.
$24/mo
BEST FORWalmart 3P sellers running OA, RA, wholesale, or private label.
Start Free TrialKeepa
Amazon-only price history, sales rank, and offer tracking. The standard for Amazon FBA sellers.
€29/mo
BEST FORAmazon FBA sellers tracking ASINs across Amazon US, UK, EU, JP.
Visit KeepaFeature-by-Feature Comparison
| Feature | Marter | Keepa |
|---|---|---|
| Tracks Walmart marketplace | ||
| Tracks Amazon marketplace | ||
| Walmart profit calculator (referral fee + WFS) | ||
| Walmart sales estimations | ||
| Historical price & offer data (Walmart) | ||
| Walmart seller tracking | ||
| Walmart category restrictions / gating check | ||
| Amazon sales rank history | ||
| Amazon Buy Box history | ||
| Chrome extension overlay | ||
| Mobile app | ||
| Price drop alerts | ||
| Bulk product analysis | ||
| Export to Google Sheets | ||
| Pre-vetted sourcing leads |
1. They Track Different Marketplaces — That's the Whole Story
The single biggest fact in this comparison is also the simplest: Keepa pulls data from Amazon's catalog and Amazon's offer system. Marter pulls data from Walmart.com. There is no overlap. A Keepa subscription will not show you a single Walmart price chart, and a Marter subscription won't analyze a single ASIN. So the real question isn't "which tool is better." It's "which marketplace are you selling on?" If the answer is Walmart, Keepa is irrelevant — and Marter is purpose-built for the workflow you need. If you sell on both, you'll run Keepa for Amazon research and Marter for Walmart research in parallel. That's how serious multi-marketplace sellers operate.
2. The Walmart Sourcing Workflow Marter Replaces
Before Marter, Walmart product research looked like this: open a Walmart listing, open a spreadsheet, look up the referral fee category, paste in the price and your cost, calculate the WFS fulfillment fee from a chart, then guess at competition by manually counting sellers. Ten minutes per product. Marter overlays that entire workflow directly on the Walmart.com product page — referral fee auto-detected from category, WFS cost auto-calculated from item dimensions and weight, profit and ROI shown live as you toggle source cost. The exact same compression that Keepa created for Amazon researchers (turning a 10-minute manual workflow into a 10-second glance) is what Marter does for Walmart. The mechanics are different because the marketplace is different, but the time savings are the same.
3. Why Walmart Data Is Younger but Surprisingly Actionable
Keepa has 10+ years of Amazon history on most ASINs. Walmart's data ecosystem is younger, so history depth is typically 90 days for price and offer count. Counterintuitively, this is often enough: Walmart prices move slower than Amazon prices (fewer algorithmic repricing wars), so a 90-day Walmart chart usually tells you more about real market conditions than a 90-day Amazon chart would. If a Walmart product has held a stable $21–$23 price band with 3 sellers for the last 60 days, that's a much higher-confidence signal than seeing the same pattern on Amazon, where it could flip overnight when a new FBA seller enters the listing.
4. Where Histomart Fits — The Closest Direct Equivalent to Keepa for Walmart
If you specifically want a Walmart tool that looks and feels like Keepa — a dedicated price history chart that overlays on every product page — the direct equivalent is Histomart. Histomart is built by the same team behind Marter and is laser-focused on Walmart price history and offer-count charts. It's the closest 1:1 replacement for the Keepa charting experience.
Marter includes historical price and offer data too — it's part of the full sourcing workflow alongside the profit calculator, sales estimations, seller tracking, and gating checks. But Marter's edge is product research depth, not pure charting. So the honest framing is: if you only want Keepa-style price charts on Walmart, Histomart alone covers it. If you want the full sourcing decision (chart + profit + sales estimate + seller activity + gating), Marter is the tool — and it overlaps with Histomart on the historical-data piece while going much deeper on everything else.
5. Which One Should You Actually Pay For?
Pay for Keepa if you sell on Amazon — period. It's still the best ASIN-level historical data tool on the market. Pay for Marter if you sell on Walmart, or are evaluating Walmart as your next channel. If you sell on both, you'll subscribe to both, because no single tool covers both marketplaces well. The "Keepa for Walmart" tools you'll find advertised online almost always fall into two categories: (a) tools designed for consumer shoppers that don't expose seller-grade data, or (b) tools that scrape limited Walmart data without the profit-math layer you actually need to make sourcing decisions. Marter + Histomart is the real seller-grade stack for Walmart in 2026.
Pricing Compared
| Plan | Marter | Keepa |
|---|---|---|
| Free trial / free tier | Free trial available | Free browser extension with limited data; paid plan unlocks full features |
| Paid plan (monthly) | $24/mo USD | €29/mo EUR |
| Annual option | Single plan, monthly billing | Annual rate available |
| Plan tiers | One plan, all features included | One plan, all features included |
| Walmart features | Included | Not available |
| Amazon features | Not available | Included |
Frequently Asked Questions
Can I use Keepa to track Walmart prices?
No. Keepa is built on Amazon's catalog and pricing systems. It has never tracked Walmart and has not announced plans to. For Walmart price history, use Histomart. For Walmart product research and profit calculation, use Marter.
Is Marter cheaper than Keepa?
Yes. Marter is $24/month USD on a single all-features plan, while Keepa is €29/month EUR (roughly $31 USD depending on conversion). Marter is the cheaper option and also includes a profit calculator, sales estimations, seller tracking, and gating checks that Keepa doesn't offer — Keepa is more of a pure data and charting tool, while Marter is a full sourcing workflow.
Should I buy both Marter and Keepa?
If you sell on both Walmart and Amazon, yes. They cover different marketplaces with no overlap, so you'd use Keepa for your Amazon research and Marter for your Walmart research. If you only sell on one marketplace, only buy the tool built for that marketplace.
Does Marter work as a Chrome extension like Keepa?
Yes. Marter is a Chrome extension that overlays product research data directly on Walmart.com product pages — same UX pattern as Keepa on Amazon. There's also a Marter mobile app for sourcing on the go, which Keepa doesn't currently offer.
What about Walmart price history specifically — is that in Marter or Histomart?
Both have it. Marter includes historical price and offer-count data as part of the full sourcing workflow. Histomart is the dedicated price-history charting tool — the closest direct equivalent to Keepa's Amazon charts, but for Walmart. If you only want Keepa-style charting, Histomart alone covers it. If you want the full sourcing decision (chart + profit + sales estimate + seller activity + gating), Marter is the tool.
I'm an Amazon FBA seller thinking of expanding to Walmart. What's the migration story?
The workflows are similar but the tools are different. Your Keepa muscle memory transfers conceptually — you'll still be checking price stability, offer count trends, and competition before sourcing. Marter just runs that same playbook on Walmart data. Most cross-platform sellers describe the learning curve as 'a few hours, not a few weeks.'
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