The clearest way to compare these tools is by what they are built around. Perplexity is built around the web: you ask, it searches, and it answers with citations to sites. Scholarly is built around your documents: you upload, and everything that follows, from chat to video lectures, is grounded in that persistent library with page-level citations into your own files. If your questions are about the world, Perplexity fits. If your questions are about your material, a 300-page regulation, a course packet, a folder of client documents, Scholarly fits.
The second difference is the output. Perplexity's product is an answer. Scholarly's product is an artifact: a chaptered, narrated video lecture built from your compliance manual, a three-speaker podcast from a research paper, a graded practice exam from your notes, a flashcard deck with SM-2 spaced repetition that exports to Anki. For professionals turning documents into training, and for anyone studying toward an exam, the artifact is the point.
On price: Perplexity Pro is $20/mo ($16.67/mo billed annually), Education Pro is $10/mo with student verification, and Max is $200/mo. Scholarly Premium is $30/mo or $144/yr with 10 weekly creation credits, Laureate is $99/mo with 80, and Premium Teams is $35/seat/mo (or $336/seat/yr) for 1-29 seats. If fast web research is the whole job, Perplexity is the cheaper specialist. If the job is getting real study and training material out of your own documents, that is what Scholarly's credits buy.