Most conference programmes get assembled twice.
Once in a spreadsheet and an inbox: who was invited, who said yes, who still has not sent a headshot, whose contract came back signed. Then again on the website, by hand, because nothing in that first pile is in a shape anyone can publish. So the programme becomes a PDF, and someone retypes it into the site. Then a keynote moves room and a speaker pulls out, and suddenly there are four versions of the truth and three of them are wrong, while a colleague scrolls back through an email thread to work out whether Professor Bakker ever actually confirmed.
Lineup collapses both halves into one. Speakers, sessions and sponsors live in the Event Vault console. You track them there, chase what is missing there, and publish from there, and every page carrying the widget updates. No re-export, no ticket raised with your web team, no PDF to regenerate the night before doors open.
It is the same speaker workspace and publishing engine that ships with every full Event Vault plan, sold on its own for organisers who need the programme handled and do not need an attendee app. Which also means that if you later decide you do want the app, you upgrade this same event rather than starting it again.