archive.org 的前十大競爭對手

researchgate.net

access 160+ million publications and connect with 25+ million researchers. join for free and gain visibility by uploading your research.

openlibrary.org

open library is an open, editable library catalog, building towards a web page for every book ever published. read, borrow, and discover more than 3m books for free.

yumpu.com

yumpu releases magazines, documents and catalogs on the internet. publish for free. gain new readers and costumers worldwide.

libgen.is

library genesis is a scientific community targeting collection of books on natural science disciplines and engineering.

academia.edu

academia.edu is a place to share and follow research.

perlego.com

save up to 90% on textbooks. read over a million professional and academic ebooks in one simple space.

semanticscholar.org

semantic scholar uses groundbreaking ai and engineering to understand the semantics of scientific literature to help scholars discover relevant research.

goodreads.com

find and read more books you’ll love, and keep track of the books you want to read. be part of the world’s largest community of book lovers on goodreads.

pdfcoffee.com

you may publish any number of documents in pdf, microsoft word and powerpoint format. all files uploaded to the website are automatically adapted for displaying on ipad, iphone, android and other platforms.

quillbot.com

quillbot's paraphrasing tool is trusted by millions worldwide to rewrite sentences, paragraphs, or articles using state-of-the-art ai.