Briefy vs Sidenote

Briefy turns lengthy content into structured summaries and stores them in a knowledge base for later review. It can produce overviews, tables, mindmaps and timelines from websites, videos, email threads, podcasts and PDFs. Users can save, review, search, ask questions about and share briefs, and navigate back to the source material to check details. Briefy supports multiple languages and inline translations. Its Gmail feature is described as an email copilot for skimming threads and composing replies. The product is available as an extension, on iOS and macOS, and on the web. PDF summarization requires Premium or Ultra, with respective file-size caps of 20MB and 50MB; YouTube summaries currently require subtitles. The free plan lists 30 credits per month. Premium is listed at $89.88 a year, billed annually; Ultra is $167.88 a year, billed annually. The pricing page says new subscriptions and credit purchases are no longer available, and both paid plans are marked unavailable for new subscriptions.

Sidenote is a browser-based AI reading assistant for asking questions about documents and tracing answers back to their source passages. Select a citation to jump to and highlight the cited text. It can summarize and explain documents, build glossaries, search files, and organize material with notes, highlights, tags, starred documents, and multi-document collections. It reads browser-rendered PDFs, including scanned PDFs with OCR, and accepts PDF, DOCX, PPTX, TXT, MD, MDX, and RTF uploads. Dedicated integrations include Confluence, Notion, Google Docs, Slack canvases, SharePoint, and OneDrive. Extensions are listed for Chrome, Edge, and Firefox; Opera is coming soon. The free plan allows 3 documents per month, while Pro is £10/mo billed monthly. A 7-day Pro trial requires no card and limits users to 10 documents, 20 summaries, and 10 chat turns. Users can choose to keep documents while their account is open or discard them, which purges a document within 24 hours. Sidenote says content is not used to train AI models, but it is not yet SOC 2 certified.