Hyperwrite has a research mode that pulls real academic citations and I use it constantly now
I write long-form content on health and nutrition topics where I need to back up claims with real sources, not just make assertions and hope nobody checks. Finding relevant papers, reading them, extracting what is actually useful and then citing them properly used to eat up a huge chunk of my writing time.
Hyperwrite has a Research mode that searches through millions of scholarly papers and pulls in citations and factual information as you write. That combination of actual research access with the writing interface is what makes it different from most AI writing tools that just generate plausible-sounding text without sourcing anything.
The tool library is worth exploring separately from the core writing modes. There are over 100 specialized tools covering writing, education, business and marketing. The Flexible AutoWrite and Summarizer are the two I reach for most often but the depth of the library means there is usually something specific enough to be genuinely useful rather than generic.
The browser extension is how I use it day to day. It sits across whatever I am working in and provides real-time writing suggestions and typeaheads without me having to switch tabs or copy paste into a separate interface. Custom voice personas are available on the higher plans which matters if you are writing for multiple clients with different styles.