A Perplexity alternative for your own documents
Perplexity is great at searching the web. When the answer is in your readings, lecture slides, or reports, Silas searches those instead and cites the exact page.
Silas vs. Perplexity
| Feature | Silas | Perplexity |
|---|---|---|
| Primary source | Your documents first, with web search when you ask | The web first, with files in Projects |
| Citations | Exact file, page, and section in your documents | Numbered links to web sources |
| AI models | Claude, Gemini, and GPT, switchable mid-chat | Choice of Sonar, GPT, Gemini, Claude, and others on Pro |
| Built for | Studying and research on your own files, with Canvas sync | Researching the open web |
| Output | Cited answers, flashcards, quizzes, and LaTeX from your files | Cited answers and research reports |
| Price | Free plan; Student $10/month; Pro $20/month | Free plan (3 uploads a week); Pro $20/month |
Perplexity details are based on Perplexity's public documentation as of October 2026 and may change.
When Silas is the better fit
Many people use both. Perplexity for discovering what the web says, Silas for working with the sources you have already chosen. Once your papers, notes, or course files are in Silas, every answer comes from them, and every claim links to the page so you can quote it with confidence.
That makes Silas a natural fit for coursework and research: literature reviews, Canvas course files, and exam prep.
Frequently asked questions
What is the difference between Silas and Perplexity?
Perplexity is an answer engine for the web: it searches online sources and cites links. Silas is built around your own library. It indexes your PDFs, notes, and course files and cites the exact page each answer came from, and it can search the web too when you ask.
Can I upload files to Perplexity instead?
Yes, Perplexity Projects accept files. The difference is focus: Silas is designed for document-grounded work, with page-level citations, Canvas sync, and study tools like flashcards and quizzes generated from your files.
Which is better for students?
For researching a topic on the open web, Perplexity is excellent. For studying your own course material (lecture slides, readings, assignment briefs), Silas fits better because it answers from those files and turns them into flashcards and practice quizzes.
Does Silas search the web?
Yes. Silas can run a web search alongside your documents when a question needs current information, and links the web pages it used.
How much does Silas cost?
There is a free plan to start. Student is $10/month with every model and integrations; Pro is $20/month for a 5,000-document library.