Felo Search vs SciSpace

Felo Search is an AI-driven search engine that searches the web in real time and presents answers with numbered footnotes linking to sources. It accepts natural-language questions. Quick Search is intended for fast answers, while Professional Search examines questions from multiple dimensions and may ask follow-up questions. Results can include related image and video blocks in a sidebar. Users can upload TXT, Word, or PDF files up to 25 MB for analysis. Free users can analyze up to three files per day, with one file per question and up to one million words processed. Uploaded files are retained for seven days; Felo Pro files are retained permanently, according to the file-upload FAQ. The service is available on Android, iOS, and the web. Its free plan allows five professional searches per day. Professional Version costs $14.99 a month and allows 100 professional searches per day with unlimited file analyses per day. Subscription payments are processed through Stripe, which accepts Visa, MasterCard, and AMEX cards.

SciSpace is a platform for finding, analyzing, and writing about scientific literature. Its literature review tool searches more than 280 million articles and organizes concise findings in tables with customizable columns. Chat with PDF offers citation-backed answers, section-by-section summaries, explanations of highlighted passages, and related-paper recommendations. Writing tools include AI-assisted suggestions, paraphrasing in context, style improvements, and an editor supporting more than 75 languages. Users can import references from Zotero or EndNote, though the Zotero import flow excludes papers without a DOI. A Chrome extension explains selected text, math, and tables; its mobile app is for iOS and supports searching, summarizing, and exploring peer-reviewed journals. SciSpace says its repository has metadata for 200 million-plus papers and 50 million-plus open-access full-text PDFs. It lists extension, iOS, and web access. The free plan is free and includes 100 monthly credits; paid plans start at $20/mo. SciSpace says uploaded PDFs are private to the user and are not used to train its AI models.