Your customer signs, pays the deposit and leaves a security hold, in a single link.
A yes that commits. Spondaro turns your quote into a firm commitment: signed, deposit collected, hold blocked without being charged. No more last-minute cancellations, bank transfers to chase or deposit cheques.
- No commitment
- Encrypted data
- Payments secured by Stripe
Free, no subscription, no credit card. You only pay for the external services you choose.
Studio Lumière
Sound system hire, Saturday 14
Rental agreement
Signature
Signed Nov 12 at 6:42 pm
Deposit €150
Paid by card
Security hold €800
Card pre-authorisation, not charged
Payments secured by Stripe
1 link
Signature, deposit and hold
€0
Subscription
0.6%
Of amounts collected, minimum €1.50 excl. VAT per paid engagement
Soon
Reinforced protection (SMS, eIDAS qualified timestamp)
Everything you need to secure a booking
Built for equipment rental, events, photographers, venues and tradespeople.
Electronic signature
Quote, rental contract, terms: the customer signs on their phone. Every step is timestamped and kept in an evidence file.
Deposit
Paid by card or SEPA debit right after signing, straight to your Stripe account.
Hold without a cheque
Card pre-authorisation: the amount is blocked on the customer's card, not charged. Release it in one click, or capture proven damage with a reason.
Real-time tracking
Engagement dashboard: awaiting signature, awaiting payment, hold in progress, completed.
Your brand
Your logo and colour on the customer page and emails.
API and webhooks
POST /v1/engagements from your quoting or rental software; signed webhooks on every status change.
How it works
You send the quote
From the dashboard or the API: the PDF, the deposit amount and the hold amount.
Your customer says yes
They open the link, sign, pay the deposit and place the hold, in a few minutes.
You start covered
Deposit received, hold blocked, evidence archived. When the equipment comes back, you release the hold.
Where the money goes, and what happens to the deposit hold
Payments go through Stripe, straight to your professional's account. Spondaro never collects money on your behalf.
The deposit lands with you
The customer pays on a secure Stripe page. The money goes directly to your Stripe account; Spondaro only keeps its share, shown before you send.
The security deposit is a hold
The amount is blocked on the customer's card, not charged. They see the hold, you keep the guarantee, and nobody writes a cheque.
Release or reasoned capture
On return, you release the hold in one click. If something is damaged, you capture all or part of the amount, with a reason kept in the file.
A limited duration, announced
A hold lasts about 7 days, up to 30 depending on the card and your account's eligibility. The deadline is shown in your dashboard and you are warned 2 days before.
Spondaro never sees your customer's card number: it is entered at Stripe.
Built for your trade
Equipment rental
A signed rental agreement and a card hold to cover possible damage.
Events and venues
Booking confirmed by deposit, with no deposit cheque to handle or return.
Photographers
A signed quote and a paid deposit before the shoot.
Trades and service providers
A signed agreement and a collected deposit before the work starts.
curl -X POST https://api.spondaro.com/v1/engagements \
-H "Authorization: Bearer sk_test_votre_cle" \
-H "Content-Type: application/json" \
-d '{
"document_url": "https://example.com/contrat.pdf",
"title": "Location sono – samedi 14",
"signers": [{ "name": "Jean Dupont", "email": "jean@example.com", "role": "Client" }],
"deposit_amount_cents": 15000,
"hold_amount_cents": 80000,
"hold_until": "2026-11-16T18:00:00Z",
"redirect_url": "https://monsaas.com/success",
"webhook_url": "https://monsaas.com/api/webhook-signature"
}'Two protection levels, chosen transparently
Standard is free and fits most bookings. Reinforced costs a little and protects better in a dispute: one parameter, protection.
Standard protection
Simple signature or email-code verification, Spondaro evidence file, timestamp from a free non-qualified authority. The cheapest, and the least covered.
Reinforced protection
SMS verification of the signer and eIDAS qualified timestamp from a trust service provider. Coming soon: the price will be shown before each engagement.
Spondaro versus separate tools
An e-signature tool, a card terminal and a deposit cheque, or a single link.
Free, and upfront about what isn't
No subscription, no commitment. The freer it is, the less covered it is: you choose every time.
Standard
0€ / month
- 50 engagements per month
- Signature, deposit, hold, dashboard, API
- Free non-qualified timestamp
- Spondaro: 0.6% of amounts collected, minimum €1.50 excl. VAT per paid engagement
- Signature only: 10 free per month, then €0.25 excl. VAT
Reinforced
Coming soon
- SMS verification code
- eIDAS qualified timestamp
- Price shown before each engagement
- Taken from the collected deposit
Frequently asked questions
Is the security hold charged?
No. It is a card pre-authorisation: the amount is blocked on the customer's card without being charged. You release it when the equipment comes back, or capture proven damage with a reason. A standard hold lasts about 7 days; it can reach 30 days depending on the card network, if your Stripe account is eligible. If the rental runs longer, the pre-authorisation expires at the bank: you are warned before it does, and the hold no longer guarantees anything.
Where does the deposit go?
Straight to your Stripe account, which you connect in a few minutes. Spondaro never holds your funds.
What does it really cost?
The tool is free: Spondaro takes 0.6% of amounts collected, with a minimum of €1.50 excl. VAT per paid engagement, and nothing if the customer does not pay. For a hold on its own, the minimum is due as soon as it is authorised, even if released without a charge. The first ten signature-only requests each month are free, then €0.25 excl. VAT. Reinforced protection (SMS, qualified timestamp) is coming soon: it will be billed at cost + 35%, only if you choose it. Stripe also takes its usual fees on your account.
Is a Spondaro signature legally valid?
Yes, a simple electronic signature has legal effect under the eIDAS regulation: it cannot be refused solely because it is electronic. Only a qualified signature is automatically equivalent to a handwritten one. Spondaro provides an evidence file (SHA-256 fingerprint, timestamp, IP address); its evidential weight depends on the context of a dispute and is assessed by the judge, with no guaranteed outcome. Standard protection uses a free non-qualified timestamp; reinforced protection a qualified one, which carries a presumption of accurate date and data integrity.
Your next quote, signed and secured?
Create an account, send a test engagement and follow your customer's journey in under 5 minutes.
Try for free