Best for
Best for Etsy sellers who plan listings around keyword seasonality and want their listings graded.
E-commerce Seller Tools Comparison
Marmalead vs. SellerApp
At a glance
At a glance
Best for
Best for Amazon sellers and agencies whose main workload is advertising, with research and listing checks alongside.
Cataleo does not name a winner. Both statements come from the vendors themselves.
Full Comparison
| Criterion | Marmalead | SellerApp |
|---|---|---|
| Starting price | lower value $19 / month $53 paid quarterly, $190 paid annually, or $300 once for a lifetime plan. | Freemium free; Pro from $99 / month The pricing FAQ states a yearly plan saves 50% against monthly billing; yearly amounts are not shown. Smart is $149 a month for the first 3 months, then $250. |
| Free trial | Not stated | Freemium plan with limited access, no credit card required |
| API | Not stated | Paid Amazon data APIs for products, keywords, listing quality, FBA fees and profit, with a key issued on subscribing and 100 free tokens to start |
| Hosting | Cloud: a web app | Cloud: a web app and a browser extension |
| Product research | Trending topics from social media and popular Etsy searches, plus bargain, mid-range and premium price ranges showing how the market prices a product | Product research and product intelligence, ASIN tracking of historical pricing, sales estimates, revenue trends and listing quality over time, and a browser extension that shows data on Amazon product pages |
| Marketplace keyword research | Storm keyword suggestions, similar searches, search volume, engagement and competition per keyword, 12 months of seasonality, a 3-month forecast and side-by-side comparison | Keyword Explorer for keyword research and a keyword tracker that monitors rankings; keyword tracking is part of the Pro plan |
| Listing optimisation | Letter grades for shops and listings built from SEO factors and sales factors, AI description critique, AI-generated FAQs and AI authoring | Listing Quality Index (LQI) analysis of Amazon listings across 6 to 7 areas; listing optimisation and creation is also sold as a managed service per parent ASIN |
| Competitor tracking | Not stated | Competitor research, and ASIN tracking that follows any product's pricing, sales estimates and listing quality over time |
| Fee and profit calculation | Not stated | Profit and loss tracking at every level of the account, plus FBA Fees and Amazon Profit Calculator APIs |
| Marketplaces covered | Etsy | Amazon; the pricing page lists US, CA, MX, BR, DE, ES, FR, IT, NL, PL, SE, TR, UK, SA, AE, AU, IN, JP and SG, while its FAQ names 15 of these |
| Integrations and API | Etsy shop connection through Etsy's own channel, with several shops per account | Paid APIs for product details, best sellers by category, category tree, reviews, keywords, keyword tracking, indexing, listing quality, FBA fees, profit, storefronts and search results; pricing is usage-based and on request |
| AI features | Yes | Yes |
| Deployment | Cloud (SaaS), Browser-based | Cloud (SaaS), Browser-based |
| Support | Email helpdesk | more entries Email helpdesk, Chat |
| Onboarding | Not stated | Personal consulting |
| Integrations | Etsy | Browser extension |
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Row where the values differ The small markers point at the lower number, the longer list or the stated feature. They describe the data, they are not a verdict.
The short version
Key Differences
- Starting price Marmalead $19 / month SellerApp Freemium free; Pro from $99 / month
- Hosting Marmalead Cloud: a web app SellerApp Cloud: a web app and a browser extension
- Support Marmalead Email helpdesk SellerApp Email helpdesk, Chat
- Product research Marmalead Trending topics from social media and popular Etsy searches, plus bargain, mid-range and premium price ranges showing how the market prices a product SellerApp Product research and product intelligence, ASIN tracking of historical pricing, sales estimates, revenue trends and listing quality over time, and a browser extension that shows data on Amazon product pages
- Marketplace keyword research Marmalead Storm keyword suggestions, similar searches, search volume, engagement and competition per keyword, 12 months of seasonality, a 3-month forecast and side-by-side comparison SellerApp Keyword Explorer for keyword research and a keyword tracker that monitors rankings; keyword tracking is part of the Pro plan
Every line is one datapoint from the table above, picked automatically. Nothing here is written text.
The trade-offs
Strengths and Limitations
Marmalead
Strengths
- Keyword data includes 12 months of seasonality and a 3-month forecast
- Lifetime plan for a single payment of $300
- Several Etsy shops can be connected to one account
- Course library included with the subscription
Limitations
- No free plan or trial named on the pricing page
- The site names no competitor tracking
- Etsy is the only marketplace named
- Payments for the current billing period are not refunded on cancellation
SellerApp
Strengths
- Freemium plan with no credit card required
- Advertising automation and research in the same account
- Listing Quality Index analysis of Amazon listings
- Documented Amazon data APIs, starting with 100 free tokens
Limitations
- Yearly prices are not shown, only a stated 50% saving
- Smart is discounted only for the first 3 months, then $250 a month
- API pricing is on request
- Agencies pay 0.5% to 2.5% of Amazon ad spend on top of the base fee
Plans
Pricing
Marmalead
- Entrepreneur $19 / month Paid monthly. Also $53 paid quarterly or $190 paid annually.
- Lifetime $300 once A single payment instead of a subscription.
SellerApp
- Freemium $0 For sellers getting started on Amazon. Basic functionalities including product research; no credit card required.
- Pro From $99 / month Adds insights and tracking, keyword tracking, listing quality and email support.
- Smart From $250 / month $149 a month for the first 3 months. Adds ads automation, a quarterly business review, email and chat support, a dedicated account manager and custom development.
- Custom On request Smart plan plus data warehousing, custom development, a product solution expert and priority support.
- Agency $300 plus 0.5% to 2.5% of Amazon ad spend Agency program with ad automation, multiple accounts and reporting; the FAQ calls $300 a starting sum and states no minimum duration.
What users say
Review Scores · opens after launch
Marmalead
- Ease of use
- Not rated yet
- User interface
- Not rated yet
- Onboarding
- Not rated yet
- Support and service
- Not rated yet
- Value for money
- Not rated yet
- Features
- Not rated yet
No reviews yet. Nothing has been published here yet, and no score is shown. How a review is checked before it appears is described below.
SellerApp
- Ease of use
- Not rated yet
- User interface
- Not rated yet
- Onboarding
- Not rated yet
- Support and service
- Not rated yet
- Value for money
- Not rated yet
- Features
- Not rated yet
No reviews yet. Nothing has been published here yet, and no score is shown. How a review is checked before it appears is described below.
How we check reviews
Before sending, the author has to confirm three things: that they have used the product themselves, that they work neither for the vendor nor for a competitor, and that nobody is paying them for the review. We also ask whether the vendor invited them to write it. That answer is required, either answer is accepted, and it stays with the review.
Every review is read by a person before it appears. An email address is required and is confirmed: we send a link to it, and a review does not reach us until the author opens that link, so a review has a sender who was reachable at least once rather than being anonymous. Where what somebody writes needs backing, we ask them for evidence that they used the product, and a review that does not get it is not published. We publish positive and negative reviews alike, we pay nothing and offer nothing for a review, and we accept none that was bought or incentivised.
What we cannot do is verify a purchase. There is no shop here and no account, so whether the author really used the tool rests on their own declaration, on whatever we ask them for, and on the plausibility of what they write. We say so rather than implying a check that does not exist.
A vendor cannot buy a review, and cannot have one removed or changed because they dislike it. We remove or edit a review only if it breaks our rules or the law, for example a false statement of fact. Paid placement has no effect on which reviews appear or on any score.
Where this comes from
Where this comes from
Marmalead https://marmalead.com/ · checked against the official source on 2026-11-10
SellerApp https://www.sellerapp.com/ · checked against the official source on 2026-11-11
This table lists factual criteria taken from information the vendors publish themselves. For how we put it together, see the methodology.