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SG Hub

Your research library, with AI that never uploads your papers

Search eight academic databases, read and annotate PDFs, and turn any paper into a structured analysis — all on your own machine.

Release Candidate v2.3.0-rc.2 · Free forever for local features · Windows 10 21H2+ / macOS 12+

SG Hub search results showing papers aggregated from arXiv, PubMed and Crossref

From search to insight

Four things you do every week, in one application.

Find what matters

One search box across arXiv, PubMed, Crossref, OpenAlex, Semantic Scholar, CORE, DBLP and DOAJ. Paste a DOI and get that exact paper. Use field syntax like ti: and au: when you know what you're after — or narrow down with facets when you don't.

Field syntax and facet filters narrowing search results by year, journal and author

Read it — and understand it

A built-in PDF reader with highlights and notes that stay exactly where you left them. Full-text translation that keeps the original layout intact. Select any passage to translate it or ask a question, and the answer appears right there — no switching windows, no losing your place.

PDF reader with a highlighted passage in a research paper

Turn a paper into a report you can navigate

AI deep reading runs the full text through a Skill and gives you back a structured report — background, method, contributions, limitations, related work — as an interactive document with tabs. Long papers take a few minutes, and you can keep working on something else while it runs.

What a report contains
  • Background and positioning within related work
  • Method breakdown, step by step
  • Contributions, stated and inferred
  • Limitations and open questions
  • Suggested follow-up reading

Keep a library you can still open in five years

Folders, tags, and full-text search across everything you've collected. PDFs are stored as ordinary files on your disk — not locked inside a database. Back them up, sync them your own way, or open them with any other tool.

Literature library with folders, tags and local PDF files

Your papers stay on your machine

Your computer ──── direct ────> Model provider In BYOK mode there is no server of ours in between.
  • Literature, PDFs, annotations and chat history are stored locally and never uploaded.
  • API keys live in your operating system's keychain — never in a config file, never in a log.
  • The app works fully without an account. Sign in only if you want cloud storage or managed AI quota.

Bring your own model — or use ours

  • Claude
  • GPT
  • Gemini
  • DeepSeek
  • Local models via Ollama

Use your own API key and pay the provider directly — we take nothing. Or subscribe and use managed quota, with separate pools for fast and advanced models. Local models never count against anything.

Built for the work you actually do

Literature reviews

Cast a wide net across eight sources, then narrow with facets until the list is readable.

Deep dives

When one paper matters enough to read three times.

Staying current

Daily pushes on the keywords and authors you follow.

Start with the free tier

All local features are free forever. Download, configure a model, and search your first paper in about five minutes.

Release Candidate v2.3.0-rc.2 · Windows 10 21H2+ · macOS 12+ (Intel & Apple Silicon)