Frase is described as 'is the AI Layer for your Content. For anyone creating content on a regular basis, Frase helps you research faster so you can focus on creativity'. There are four alternatives to Frase, not only websites but also apps for SaaS. The best alternative is Topic. It's not free, so if you're looking for a free alternative, you could try Summary Generator or Summarizing - Article Summarizer.
Fast article summarizer that let's you choose the number of words you need for your summary. Article Summarizer's mission is to provide effective summary. The tool finds keywords in your text for better understanding of the topic and making a focus on this topic.