MerchantWords vs SellerApp (2026): which should you pick?

Pick MerchantWords if

• Fits if you write Amazon listings and want the phrases shoppers type there
• Works for checking which keywords put a rival's product on Amazon's first page

Look elsewhere if

• Not for you if you want to try before paying, as there's no free plan or trial
• Skip it if you sell on Walmart, eBay or Etsy too, as that data is only a custom report on request
• Tight if you sell in several countries, as Silver covers one; regional data needs Gold at $79
• Watch out: the whole database refreshes every 3 to 4 weeks, so figures can lag
• Pricey if you need every marketplace, at $149 a month for Platinum, or $749 for a team of up to 20

Pick SellerApp if

• Fits if you spend a lot on Amazon PPC and want rules to manage the bids
• Works for agencies running several Amazon ad accounts

Look elsewhere if

• Skip it if you want a fixed price up front, as plans rise with ASINs, ad spend and revenue
• Not for you if inventory planning, review requests or reimbursement claims are what you're after
• Pricey if you want the account manager: that plan is $149 a month for 3 months, then $250
• Watch out: agencies pay from $300 a month plus 0.5% to 2.5% of ad spend, and API access is quoted by sales
• Tight if you stay free, as Freemium's access is limited; the yearly price behind the 50% saving isn't shown

MerchantWords

• There is no free plan, and the help center says there is no free trial.
• Silver covers one country only; regional and global data need Gold or Platinum.
• The data is from Amazon only; Walmart, eBay or Etsy data is offered as a custom report on request.
• Search data is collected daily but the whole database is refreshed every 3 to 4 weeks.

SellerApp

• The Smart Plan's $149 price lasts for the first 3 months; the page shows $250 a month after that.
• Plan prices start at the figures shown and rise with the number of ASINs, ad spend and revenue.
• Agencies pay from $300 a month plus 0.5% to 2.5% of Amazon ad spend.
• Managed ad services and API access are quoted separately through sales.

MerchantWords

Classic Search

Look up a keyword to see phrases that contain it, with estimated Amazon search volume and seasonality, and save them to collections.

Keyword Multiplier and Explorer

Keyword Multiplier generates related and complementary keywords from a search; Keyword Explorer is where research is reviewed and edited.

ASIN Plus

A reverse ASIN lookup that shows which keywords put your product, or a competitor's, on the first page of Amazon results.

Page 1 Products

Shows the top-ranking products for any keyword on the first page of Amazon search, with figures on how crowded the market is.

Emerging Trends and history

Emerging Trends lists searches that are new on Amazon, and a history panel charts when a keyword's searches rise and fall.

Bulk Search and Product Tracker

Search many keywords or ASINs at once, and track a product's keyword rankings every day.

SellerApp

PPC automation

Rule-based bid automation with preset rules such as ACoS Reducer and Target Harvester, hourly bid changes from Marketing Stream data and dayparting.

Profit dashboard

Tracks FBA fees, ad spend, storage, shipping and product costs to show margin, net profit, ROI and TACoS for each ASIN.

Product and keyword research

Finds products and keyword opportunities, with keyword rank tracking on paid plans.

Listing Quality Index

Scores listings on titles, bullet points, images, backend keywords, descriptions and A+ content.

Chrome extension

Shows estimated daily orders, revenue, BSR, FBA fees and opportunity scores on Amazon search and product pages.

Data API

A REST API returns product, sales, advertising and keyword data, billed monthly by usage.

MerchantWords

• Silver$35

  per month for 500 searches, billed monthly

  One country's Amazon data and 10 keyword collections, for new sellers. Keyword Multiplier and Emerging Trends are not included.

• Gold$79

  per month for 1,000 searches, billed monthly

  Data for one region, such as North America, 100 keyword collections, and Keyword Multiplier and Emerging Trends.

• Platinum$149

  per month for unlimited searches, billed monthly

  Global data across every marketplace covered and 1,000 keyword collections, for brands, investors and teams.

• Enterprise$749

  per month for unlimited searches, billed monthly

  Up to 20 users, 10,000 collections and every feature, for large teams and agencies. Set up by contacting sales.

SellerApp

• Freemium$0

  Basic product research and overview, product intelligence, advertising overview, campaign manager and listing quality, with limited access.

• Pro Plan$99

  per month and up

  For sellers growing several products: adds insights, keyword tracking, listing quality reports, ads automation and email support.

• Smart Plan with Automation$250

  per month and up

  Advertising automation, quarterly business reviews, chat support and a dedicated account manager. Advertised at $149 a month for the first 3 months.

• CustomCustom

  Smart Plan plus data warehousing, custom development, a product solution expert and priority support, arranged on a call.

MerchantWords

• Annual discount

  Two months free with annual billing

  MerchantWords' help center says an annual subscription gives two months free, for example $790 a year for Gold and $1,490 for Platinum.

SellerApp

• Other savings

  Smart Plan at $149 for the first 3 months

  The pricing page shows the Smart Plan with Automation at $149 a month for the first 3 months, down from $250.

• Annual discount

  Save 50% with a yearly plan

  SellerApp's pricing FAQ says a yearly subscription saves 50% of the fees compared with paying monthly.