Publyze — Amazon KDP Niche Research Tool by RocketWriter.ai
New - Amazon KDP Research Tool

Find profitable KDP niches in seconds

Publyze analyzes Amazon book data in real-time — BSR, sales estimates, competition scores — right inside your browser. Everything you need to publish smarter.

Get Publyze Premium — $4.99/mo

Free plan available · Premium: just $4.99/month

20+
Data Points Per Book
9
Amazon Marketplaces
$4.99
Per Month
∞
Unlimited Searches
Features

Everything you need to find your next bestseller

Publyze works as a Chrome extension, directly on Amazon. No separate app, no complicated setup.

Real-Time Amazon Overlay

Automatically appears on Amazon search & bestseller pages. See BSR, estimated sales, revenue, and niche scores — without leaving Amazon.

BSR & Sales Estimates

Research-calibrated formulas convert Amazon BSR into daily/monthly sales and revenue estimates. Format-aware for Kindle, Print, and Audiobook.

Niche Score (0-100)

Instant assessment combining demand, competition, pricing, and quality gap. Spot opportunities before anyone else.

Book Analyzer

Click any book on Amazon to see its full profile: BSR, royalty estimates, publisher type, categories, and competition data.

CSV Export

Export any analysis to CSV with one click. All data points including sales estimates, royalties, and niche scores.

Privacy First

All analysis runs locally in your browser. No data sent to external servers. Your research stays yours.

Why Publyze

Why KDP Publishers Choose Publyze

The difference between a book that sells and one that doesn't? Ten minutes of research.

Publish With Confidence

Stop guessing which niches are profitable. See real sales data, revenue estimates, and competition levels — before you create a single page.

Spot Gaps Others Miss

The Niche Score analyzes demand vs competition across 20+ data points — so you find opportunities that most publishers overlook.

Research in Seconds, Not Hours

No separate apps, no dashboards, no learning curve. Publyze works right on Amazon — search a keyword and the data is already there.

Pricing

One plan. Everything included.

No complicated tiers. No hidden features. Just $4.99/month for the full toolkit.

Publyze Premium
$4.99/mo
Cancel anytime. No commitment.
Unlimited keyword searches
Full BSR & sales data (all books)
Revenue & royalty estimates
Book Analyzer (detailed profiles)
All 9 Amazon marketplaces
CSV export
Get Publyze Premium

🔒 Secure checkout via Lemon Squeezy · Cancel anytime

FAQ

Frequently asked questions

How does Publyze work?
Publyze is a Chrome extension that works directly on Amazon. Once installed, it automatically detects when you're on an Amazon book search, bestseller, or product page and displays an overlay panel with BSR data, sales estimates, niche scores, and more. No separate software or dashboard needed — everything happens inside your browser.
How accurate are the sales estimates?
Our estimates use research-calibrated piecewise lookup tables with log-space interpolation, validated against industry-leading tools. For books with BSR under 100,000, accuracy is typically within ±30-50%. We're transparent about this — all estimates are approximations based on publicly available BSR data, not exact sales figures from Amazon.
Is there a free plan?
Yes! The free plan lets you see the top 3 books per search with full data. BSR, sales, and revenue columns are visible for those 3 books. Upgrade to Premium to unlock all books, full deep-fetch BSR data, revenue estimates, and unlimited analyses.
How do I install the extension?
After purchase, you'll receive a license key by email. Install the Publyze Chrome extension, navigate to any Amazon page, and enter your license key in the welcome panel. That's it — you'll have instant access to all Premium features.
Can I cancel anytime?
Absolutely. Your subscription is managed through Lemon Squeezy. You can cancel at any time from your customer portal (linked in your purchase confirmation email), and you won't be charged again. No contracts, no commitments.
Which Amazon marketplaces are supported?
Publyze supports 9 Amazon marketplaces: US, UK, Germany, France, Spain, Italy, Japan, Canada, and Australia. Each marketplace uses region-specific sales estimation calibration for better accuracy.
Is my data private?
Yes. All analysis runs locally in your browser. We don't collect, store, or transmit your Amazon browsing data, search history, or research findings. The only server communication is license key validation with Lemon Squeezy's secure API.
Can I use it on multiple devices?
Yes, your license can be activated on up to 2 devices simultaneously (e.g., your desktop and laptop). If you need more activations, contact our support team.

Ready to find your next bestseller?

Join smart KDP publishers who use data, not guesswork.

Get Publyze Premium — $4.99/mo

Privacy Policy

Last updated: April 7, 2026

Publyze by RocketWriter.ai ("we", "our", "us") operates the Publyze Chrome extension and related websites. This page informs you of our policies regarding the collection, use, and disclosure of personal information.

Information We Collect

Publyze is designed with privacy as a core principle. The Chrome extension runs entirely in your browser and does not collect, store, or transmit your Amazon browsing data, search queries, or research results.

We collect only the following information:

  • License key activation data: When you activate your license, we verify it through Lemon Squeezy's API. This includes your license key and a device identifier.
  • Purchase information: When you purchase a subscription, Lemon Squeezy (our payment processor) collects your name, email address, and payment information. We do not store your payment details.
  • Support communications: If you contact us via email, we retain the correspondence to provide support.

How We Use Your Information

We use the information we collect solely to:

  • Verify your license and provide access to Premium features
  • Process payments through our payment processor (Lemon Squeezy)
  • Respond to your support requests
  • Send important product updates or security notifications

Data Storage & Security

All extension data (saved niches, preferences) is stored locally in your browser using Chrome's storage API. We do not have access to this data. License validation is handled through Lemon Squeezy's secure infrastructure.

Third-Party Services

  • Lemon Squeezy: Payment processing and license management. Their privacy policy is available at lemonsqueezy.com/privacy.
  • Amazon: Publyze reads publicly available data from Amazon product pages in your browser. We do not interact with Amazon's APIs or send data to Amazon on your behalf.

Your Rights

You may request deletion of your account data by emailing hello@rocketwriter.ai. You can uninstall the extension at any time to remove all locally stored data.

Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new policy on this page and updating the "Last updated" date.

Contact Us

If you have any questions about this Privacy Policy, please contact us at hello@rocketwriter.ai.

Terms of Service

Last updated: April 7, 2026

These Terms of Service ("Terms") govern your use of the Publyze Chrome extension and related services operated by RocketWriter.ai ("we", "our", "us").

1. Acceptance of Terms

By installing or using Publyze, you agree to be bound by these Terms. If you disagree with any part of the terms, you may not use our service.

2. Description of Service

Publyze is a Chrome browser extension that analyzes publicly available Amazon book data to provide estimated sales figures, niche scores, and competition analysis for Amazon KDP publishers. All estimates are approximations and should not be relied upon as exact figures.

3. Accounts & Licenses

  • A Premium subscription grants you a license to use Publyze on up to 2 devices simultaneously.
  • License keys are personal and non-transferable.
  • Sharing, reselling, or distributing license keys is prohibited and may result in license revocation without refund.

4. Subscription & Payments

  • Premium subscriptions are billed monthly at $4.99/month through Lemon Squeezy.
  • You may cancel your subscription at any time through the Lemon Squeezy customer portal.
  • Cancellation takes effect at the end of the current billing period. No partial refunds are provided.

5. Disclaimer of Warranties

Publyze is provided "as is" without warranty of any kind. Sales estimates, niche scores, and other data are approximations based on publicly available information and should not be relied upon for business decisions without independent verification. We do not guarantee the accuracy, completeness, or reliability of any estimates.

6. Limitation of Liability

In no event shall RocketWriter.ai be liable for any indirect, incidental, special, consequential, or punitive damages arising out of or relating to your use of Publyze. Our total liability shall not exceed the amount paid by you in the 12 months preceding the claim.

7. Amazon Compliance

Publyze accesses publicly available information on Amazon product pages. We are not affiliated with, endorsed by, or sponsored by Amazon. Users are responsible for ensuring their use of Publyze complies with Amazon's terms of service.

8. Modifications

We reserve the right to modify or discontinue Publyze at any time. We will provide reasonable notice of significant changes. Continued use of the service after changes constitutes acceptance of the modified terms.

9. Contact

For questions about these Terms, contact us at hello@rocketwriter.ai.