Is there a no-subscription way to prove one AI job to a client?
Yes. Run the job through Zambo on the free tier and send your client the handover link; that alone proves one job. If the job needs a full day of work behind it, the Day Pass costs $0.99 once, covers 24 hours, and never renews. No subscription at any point.
The one-job problem deserves a one-job answer. Most proof tools are priced as subscriptions because subscriptions are good business for the seller, but a freelancer with a single delivery to prove does not need a monthly relationship with a vendor. They need a record for this job, checkable by this client, today.
The free route is genuinely sufficient for one job: the work runs through the connection, each step is saved as a verifiable receipt, and the handover link gives the client the whole record in a browser, with the Accept or Flag decision recorded. The Day Pass exists for the bigger version of the same day: several jobs, a long project, a delivery that has to be reconstructed and presented carefully. $0.99, one time, 24 hours, no subscription, no auto-renew, paid through PayPal.
What ongoing use costs, stated plainly so you can decide with full information: if proof becomes a weekly habit, the monthly pass is $29 and works out cheaper per job. Nothing about the one-job route changes if you never upgrade. The receipt you made stays checkable either way.
Checklist: prove one job in four steps
1. Run the job through the Zambo connection (free tier is enough). 2. Open the job's record and read the step states; fix or redo any step marked not checked before the client sees it. 3. Build the handover and copy its link. 4. Send the link with one sentence: "Every step of this job is behind this link; you can check each one and Accept or Flag it here." Keep the receipt IDs with your invoice copy.
Worked example
The shape of a finished one-job proof is public: https://zambo.dev/handover/bd7e5325-33fd-4c5e-b029-76b781fa2f51 holds five steps of one job behind one link, waiting on the client's decision, release on hold. Its accepted twin, https://zambo.dev/handover/45434a17-4afc-486a-9646-e689bcee4297 , shows the same page after the client accepted. One job, one link, both states.
Frequently asked questions
Is the free proof weaker than the paid proof?
No. The receipt format and the client check are the same. Paid routes buy time and volume: a full day, or a month, of recording without watching free allowances. The evidence itself does not change.
What exactly does the $0.99 Day Pass add for one job?
A full 24 hours of recording headroom for the job and everything around it: revisions, the delivery itself, and the follow-up work, all saved under the same proof habit, without counting free calls.
Will I be charged again next month?
No. The Day Pass is a one-time purchase with no subscription and no auto-renew. If you never buy anything again, nothing is charged, and your existing receipts stay checkable.
By Brennan Zambo, founder of Zambo.
Last verified: 2026-10-17.
Try a handover
A handover gives your client one proof link with verifiable receipts to review, then Accept or Flag.
try it: say 'use zambo to hand this over to <client>' in your ai