SellerSum VS CodeImage

• 13 fee and profit calculators
  Calculators for eBay, Etsy, PayPal, Stripe, Square, Whatnot, Depop, Poshmark and Mercari, plus margin, markup and food cost. A comparison hub puts every marketplace's cut side by side.
• Rates quoted from official fee pages
  Every rate comes from the marketplace's own published fee page, and each calculator shows the date it was last checked. The source link sits on the page, so you can confirm the number yourself instead of taking our word for it.
• Tested against the marketplaces' own examples
  Where a marketplace publishes a worked example, the calculator reproduces it to the cent. eBay's $400 phone example is one of them, and a unit test fails the build if it ever stops matching.
• Fee changelog and email alerts
  Every fee change is logged with the date it landed. Sign up and you get one email when any tracked marketplace moves its rates, whichever calculator you use.
• Free, no signup
  Every calculator is free and works without an account. Nothing is behind a paywall.

Possible disadvantages

• Amazon-Only Limitation
  Since the tool is built specifically for Amazon sellers, it may not support other e-commerce platforms like Shopify, eBay, or Walmart, limiting its usefulness for multi-channel sellers.
• Subscription Cost
  Like many SaaS tools in this space, SellerSum likely operates on a subscription model, which adds an ongoing expense that may not be justified for very small sellers or those just starting out.
• Learning Curve for Advanced Features
  While the basic interface may be user-friendly, understanding and utilizing more advanced analytics or customization features may require some time investment to learn.
• Dependency on Amazon API Reliability
  Because the tool relies on syncing with Amazon Seller Central, any changes to Amazon's API, policies, or data availability could impact the accuracy or functionality of SellerSum's reporting.
• Limited Customization
  Depending on the platform's design, sellers with very specific or complex accounting needs may find the reporting templates and metrics less flexible compared to building custom solutions in Excel or specialized accounting software.

• Customization Options
  CodeImage offers extensive customization options, allowing developers to personalize the appearance of their code snippets with different themes, fonts, and background styles.
• User-Friendly Interface
  The platform provides an intuitive and easy-to-navigate interface, making it accessible for users of varying technical expertise to create visually appealing code images quickly.
• High-Quality Output
  CodeImage generates high-resolution images, ensuring that the code snippets are clear and professional for use in presentations, social media, and documentation.
• Browser-Based
  As a web-based tool, CodeImage does not require any software downloads or installations, allowing users to start creating code images immediately from their browsers.

Possible disadvantages

• Limited Functionality
  While CodeImage specializes in creating code images, it lacks additional development features such as code linting or syntax checking, which might be needed for comprehensive coding tasks.
• Dependent on Internet Connectivity
  Being a web application, CodeImage requires a stable internet connection to function, which might be a limitation for users in areas with unreliable internet access.
• Potential Privacy Concerns
  Since the service operates online, users may have concerns regarding the privacy and security of their code snippets, especially when handling sensitive or proprietary code.
• Limited Language Support
  CodeImage might not support all programming languages or specific syntaxes that users require, limiting its applicability for some developers.

Tracking SellerSum since Jul 2026.

• Show HN: I made a tool to make you popular

  600 hours to build another screenshot editor? Which just adds some gradient and aligns the image? What are some differences between your product and the following free services? https://screenzy.io/ https://screenshot.rocks/... - Source: Hacker News / over 2 years ago

• Custom useAuth hook

  There are actually many options out there. For this one I used codeimage.dev but here are some other ones. Source: over 3 years ago

• Custom useAuth hook

  Haha also Reddit's highlighting is bad. I used codeimage.dev tho. Source: over 3 years ago