Live sandbox
Try YionStack without signing up.
One click drops you into a fully seeded UK business that's yours alone — real-looking customers, invoices, payroll and AI drafts waiting for your approval. Nothing you do here sends real email, files real returns, or charges anyone. It resets after inactivity, and you can create an account any time to keep it.
No card. No sign-up. Fresh data every time you click.
What's waiting inside.
Your demo loads pre-populated. You land on the operator home with two decisions to make and a real-looking dashboard to explore.
- Two AI drafts waiting for your approval
- One chase email for three overdue invoices, one VAT return prep ready to file. Approve them and watch the operator do the work.
- 12 invoices across every status
- 5 paid, 4 outstanding, 3 overdue — a representative slice of a real business's books.
- Campaign + customers + payroll
- A live email campaign with sample metrics, 5 CRM customers, and 8 employees on payroll.
- Nothing leaves the sandbox
- Email send, HMRC submission and Stripe charge are all suppressed when the demo business is the source. You can't accidentally bill anyone.
Ready when you are
Same operator, your own data.
When you're done exploring, sign up properly and the same operator runs against your real customers, invoices and payroll. 14-day trial, no card up front.