Certainly! While there may not be an exact alternative to Helium 10 that offers the same comprehensive features for free, there are some tools you can consider:
1. AMZScout: AMZScout offers a free Chrome extension that provides product research data such as sales estimates, sales history, reviews, and more. They also offer a limited free version of their web app for product research.
2. Unicorn Smasher: Unicorn Smasher is a free Chrome extension that provides sales estimates, product data, and insights to help with product research on Amazon.
3. Sonar: Sonar is a free keyword research tool developed by Sellics. It provides keyword suggestions, search volumes, and other data to help optimize product listings.
4. Google Trends: Although not specifically for Amazon sellers, Google Trends can be a useful tool to understand search trends and seasonality for different keywords or product categories.
It's important to note that while these tools offer certain functionalities for free, they may have limitations compared to Helium 10 or may not cover all aspects of Amazon selling. Paid tools like Helium 10 often provide more comprehensive features and support. However, these free alternatives can still be valuable resources for sellers on a budget.