OrbitSub
Start free

Pricing

Start free. Upgrade when your research needs more.

Every plan includes the full editor, live rooms, citations and export. Paid plans raise the limits.

Plans

Every plan includes

  • An AI co-writer you approve

    Ask, rewrite and improve inline. Every AI edit arrives as a before-and-after you apply or discard.

  • More than 10,000 citation styles

    The official CSL style registry, with locales. The bibliography formats itself.

  • Your source library

    Add sources by DOI, BibTeX, RIS or PDF, or connect Zotero and Mendeley.

  • Questions to your PDFs

    Upload papers, ask questions, pull quotes and cite straight from them.

  • Live rooms

    Write together in real time while readers suggest and Orbit AI proposes.

  • Export anywhere

    Download as Word, PDF or Markdown. Your work is always yours.

  • Publishing

    Publishing lays your work out like a journal, with a public history of how it was made.

Billing questions

How does billing work?
Paid plans are billed through PayPal, monthly or yearly. You can manage or cancel your plan from Settings, and it stays active until the end of the period you paid for.
Can I start free and upgrade later?
Yes. Everything you write on the Free plan stays with you when you upgrade.
What does Unlimited mean?
Unlimited features are subject to fair use, so the service stays fast for everyone.
Do you offer refunds?
Our refund policy explains when refunds apply and how to ask for one.