Invoices your clients can actually verify.
Generate a cryptographically signed PDF, hand it over, and let the client confirm for themselves that it’s authentic. Buy once, own it forever, no subscription.
Lifetime license, yours to keep · Secure Stripe checkout · License key delivered by email
An invoice that argues its own case
Proof that survives a dispute
Every invoice is signed with your own key. If a client ever questions an amount or a date, the document itself settles it, not your memory of the conversation.
Your client can check it themselves
They don't have to take your word for it, and they don't need an account. Verification confirms the invoice is authentic and unaltered since you signed it.
Unlimited invoices, one price
No per-invoice fee, no seat count, no plan that gets more expensive the better your year goes. Bill once a month or fifty times.
A PDF, not a portal
The output is an ordinary PDF you can email, print, or hand over. Nothing to log into, nothing that disappears if a service shuts down.
Three pieces, and that’s the whole product
It does one job properly rather than ten things adequately.
- 01
Your signing key
Generated once and held by you. It's what makes an invoice provably yours rather than merely printed by you.
- 02
The invoice generator
Fill in the work, the amount and the terms; it produces a clean, signed PDF ready to send.
- 03
Verification for your client
A check that confirms the document is authentic and hasn't been edited since signing.
How it reaches you
Unlike the download kits, SoloInvoice arrives as an email — a lifetime license key and activation instructions, sent to the address you pay with. It usually lands quickly, but it isn’t instant. If it hasn’t appeared, check spam, then contact support and we’ll resend it.
Before you buy
- How is this delivered?
- SoloInvoice ships as an email: a lifetime license key and activation instructions, sent to the address you pay with. It usually lands quickly, but unlike the download kits it isn't instant.
- Is this a subscription?
- No. One payment, yours permanently. There is no renewal, no seat count and no plan to upgrade.
- Do my clients need an account?
- No. They receive a normal PDF. Verification is something they can do without signing up for anything.
- Does it replace my accounting software?
- No, and it isn't trying to. It produces invoices you can prove are yours. Keep using whatever you already use for books and taxes.
One price, every invoice you will ever send
Bought once, yours permanently. No subscription, no upsell, no account to keep paying for.
14-day money-back guarantee · license key by email · Refund policy
- Tamper-proof signing built in
- Unlimited invoices
- Yours to run forever