About Jupiter Signup
Jupiter Signup is a sign-up form you build by describing it. Say what you are running and what it costs, and the whole page is written for you, payment included. There is no form builder to learn and no template to pick.
What it is
Most form tools hand you a blank canvas and a pile of field types. Jupiter Signup starts from a sentence instead: "a yoga class, $20 drop-in or $80 for five, capped at 18 spots." It writes the options, the prices, the capacity limits, and the questions, and you change anything afterwards by chatting with it rather than hunting through settings.
It is built for the sign-ups that involve money, classes, camps, events, fundraisers, and it is good at the awkward parts: class packs and bundles, deposits, per-person pricing, discount and scholarship codes, waitlists when you fill up, and a deadline that closes the form on time. Every charge is recomputed on our server from a price catalog the page cannot alter, so a total is always the real one.
Payments are optional, though. Plenty of forms here are free RSVPs, waitlists, and contact forms with no prices at all. When you do charge, the money goes to your own Stripe account rather than through us, or you collect it yourself with Venmo, PayPal, Cash App, Zeffy, Zelle, or cash and mark people paid as they settle up. See what you can build and what it costs.
Who builds it
Jupiter Signup is built and run by PerfSpot LLC, a small US software company, as part of the Middlefield General Services family of tools. We ship small, focused products and keep them running. Building and sharing forms is free with no monthly fee required; a flat 2% applies only to card payments you actually collect. Questions and problems go to the contact page, and a real person reads every message.
Tools we also build that you might find useful
These are standalone, independent tools that happen to share builders. No shared login, no bundle, just relatives worth a look.
Slick invoices and quotes in seconds — your customer can update details, sign, or pay right on the document, so you get paid faster.
Turn any lobby, desk, or doorway into an automated check-in with a single QR code — people scan, and you get notified.
A shareable calendar for everyone from families to sports teams to PTAs — then bolstered with communication and group-management tools as you grow.
Simple clock-in for your in-person volunteers — a tap or scan checks them in, and you get the hours, reports, and certificates, without the overkill or the cost.
Part of a family of independent tools
Jupiter Signup is one of a set of small, independently useful tools built by the same people.
AcornCheckIn · AcornReply · AcornRetain · Cobalt Capture · Cobalt Medicare · Cobalt Prosper · JupiterInvoice · Kangaroo Clock · KangarooKiddo · SpyglassBeacon · TangoHive · TangoQR