Inviting someone to help
Give one person the keys to edit and another the billing, without sharing a password — and hand the whole site over if you need to.
Right now, for most people, "sharing the website" means sharing a password. The bookkeeper needs the invoices but should not be able to rewrite your home page. The person writing your words should not see your card.
So instead you invite people, and choose what each one can do.
The three roles
Owner — everything. The site, the plan, the domain, the people, and the right to hand it all to someone else. Every site has exactly one.
Editor — changes the site. Chat, pointing and editing, the lists, publishing, and the enquiries that come in. They never see your card or your plan.
Financial — the money side. The plan, the card, credits, receipts and domain purchases. They can see the site but cannot change it.
Give the editor role to people you would trust with the decision: an editor's change is a real change, and there is no review step where you approve it first.
Sending an invitation
Type their email address, choose the role, send. They get a link, make their own login, and land in your project.
Nobody shares a password, and when someone leaves you remove exactly one person rather than changing a password everybody knew.
You can change someone's role later, remove them, or send the invitation again if it got buried. An invitation that has not been used yet can be cancelled.
Handing the site over
If you built the site for someone else — a parent's shop, a friend's studio — you can transfer ownership to them properly. They become the owner; you either stay on as an editor, or step away entirely. Nothing about the site has to move, and no login is shared.
Spanli will not let you strand a site: you cannot remove or demote the last owner.
Two people at once
You can both be in the project, but changes happen one at a time. If a change is already running, the next one waits for it rather than the two colliding.
It is a deliberate choice — two changes landing on the same page at once is how sites get quietly broken — but it does mean this is not a shared document with several cursors in it.
Does another person cost more?
No. Plans are priced per site, not per person. Bringing in an editor or a bookkeeper does not change what you pay. See Plans and credits.