Alternatives · Keyword Research
KDSPY alternatives
As of Oct 23, 2026, the highest-graded KDSPY alternative is Publisher Rocket (2.2 GPA).
KDSPY compared with 3 alternatives: Publisher Rocket, MerchantWords and Helium 10.
KDSPY is a paid product, starting at $79 one-time, plus tax where it applies. 1 of the 3 alternatives is free or has a free plan.
Listings checked up to Oct 23, 2026 · Where the facts come from
At a glance
| Tool | Price | Free plan | Runs on |
|---|---|---|---|
| KDSPYThis tool | From $79 one-time | No | Browser extension |
| Publisher Rocket | From $199 one-time | No | macOS, Windows |
| MerchantWords | From $35/mo | No | Web |
| Helium 10 | Free plan · from $99/mo | Yes | Web, Browser extension |
How each one differs from KDSPY
Publisher Rocket
Amazon keyword, category and ad research for book authors
- Publisher Rocket starts at $199 one-time, for lifetime access.
- Publisher Rocket also lists macOS and Windows apps.
- Publisher Rocket lists no browser extension, which KDSPY has.
Suits: Self-published authors choosing keywords and categories for a new book
MerchantWords
Amazon keyword research from searches made on Amazon marketplaces
- MerchantWords starts at $35 per month for 500 searches, billed monthly.
- MerchantWords also lists a web app.
- MerchantWords lists no browser extension, which KDSPY has.
Suits: Amazon sellers writing listings and choosing keywords for them
Helium 10
All-in-one Amazon seller suite for research, listings, ads and profits
- Helium 10 starts at $99 per month, billed annually ($129 billed monthly).
- Helium 10 has a free plan, which KDSPY lacks.
- Helium 10 also lists a web app.
- Helium 10 also covers AI agents, rank tracking, inventory and dashboards.
Suits: Private label sellers researching, launching and running Amazon products in one account
Limits worth knowing in KDSPY
- It runs only as a browser extension for Chrome, Firefox, Edge, Opera and Brave; the site says it does not work on iPads, tablets or phones.
- Data covers Amazon only: the US, UK, Canada, Germany, Australia, Italy, Spain, France, India, Japan, Mexico, Brazil and Poland stores.
- There is no free trial or free plan, only a 60-day money-back guarantee.
- The license covers up to two devices you own.
Common questions
What are the alternatives to KDSPY?
The alternatives to KDSPY in this directory are Publisher Rocket, MerchantWords and Helium 10. Each one has a side-by-side comparison with KDSPY.
Is there a free alternative to KDSPY?
Yes. Helium 10 has a free plan alongside paid ones.
Which KDSPY alternatives work on Windows?
The KDSPY listing does not include a Windows app. Publisher Rocket lists one.
Which KDSPY alternatives work on macOS?
The KDSPY listing does not include a macOS app. Publisher Rocket lists one.
When were these prices checked?
Each listing shows its own date. On this page they run from Oct 18, 2026 to Oct 23, 2026. Vendors change prices without notice, so confirm on their site before you buy.