If you're looking for alternatives to Google Keyword Planner, there are several great SEO tools available. Moz Keyword Explorer provides valuable insights with keyword difficulty scores and search volume data, making it a strong choice. SpyFu is another excellent tool, as it allows you to analyze competitors' keywords and uncover potential opportunities for your own strategy. LongTailPro specializes in long-tail keyword research, which is especially helpful for targeting niche keywords with lower competition. KWFinder is known for its user-friendly interface and accurate keyword data, making it a great option for beginners. These tools offer a variety of features, so it's best to choose one based on your specific needs.