SWITCH FROM PROSPERO
Prospero vs Calisto Proposals
Prospero multiplies its monthly rate by every team member. Calisto Proposals charges once per proposal, whoever on the team sent it, with the signature inside.
Feature by feature
Calisto Proposals beside Prospero
- 9 Only in Calisto Proposals
- 9 In both
- 2 Only in Prospero
| 20 features | Calisto Proposals | Prospero |
|---|---|---|
| Pricing model | ||
| Charged once per proposal, never per userProspero charges per team member per month. | Oui | Non |
| No annual term or monthly planProspero bills monthly or annually, and the annual rate is the lower one. | Oui | Non |
| No send limit or proposal cap to run out ofProspero includes unlimited proposals. | Oui | Oui |
| Anyone in the account can send without a seatProspero's rate multiplies by every team member; 25 members and above is custom pricing. | Oui | Non |
| A month with no proposal sent costs nothing | Oui | Non |
| Building | ||
| Templates saved with their design | Oui | Oui |
| Priced options the client chooses betweenProspero includes an interactive pricing module. Calisto proposals carry up to four option tiers. | Oui | Oui |
| Line items from a product price book | Oui | Oui |
| Cost and margin on every line, hidden from the client | Oui | Non |
| Proposals above an amount held for internal approval before they can be sentCalisto holds the proposal for review when its total is at or above the account's approval amount. | Oui | Non |
| Client side | ||
| E-signature included, with no separate signing product to buy | Oui | Oui |
| Client pays from the proposalCalisto collects a deposit on the link, through the account's own connected gateway. | Oui | Oui |
| Government ID and liveness check before the proposal opensProspero protects proposals with a password. Calisto's check is its own product, priced per check. | Oui | Non |
| Follow-up | ||
| Know when the client opens itCalisto alerts in the app and by push on the first open, not by email. | Oui | Oui |
| Time spent on each page, and on each optionProspero records open count and open duration. | Oui | Oui |
| Every version kept, with a price comparison between any two | Oui | Oui |
| Change orders raised against an accepted proposal | Oui | Non |
| Where it stops | ||
| Automatic follow-up reminders on a scheduleCalisto sends a reminder when you ask for one. Scheduled follow-ups are not running yet. | Non | Oui |
| AI writing inside the editor | Non | Oui |
| Contacts, deals, price book and payments in the same system as the proposal | Oui | Non |
The model
Prospero sells a seat per team member. Calisto Proposals charges per proposal.
A seat charges every month for the people who might send. A proposal is charged once, when it reaches the client.
A Prospero member
- Priced
- Per team member, per month
- Allowance
- Unlimited proposals
- Colleagues
- Each one multiplies the rate
- Quiet month
- The bill arrives anyway
A Calisto proposal
- Priced
- Once per proposal, from the catalogue
- Signature
- Inside the same charge, every signer
- Colleagues
- Anyone in the account sends
- Quiet month
- Costs nothing
What moves
Bringing your data from Prospero
Your data is read in your own browser and sent to your Calisto account. Calisto never sees your login for the old system.
From an export file
Export your data from Prospero and drop the file in. It is read in your browser and mapped onto Calisto.
Clients
PRICING, SIDE BY SIDE
What Prospero publishes, beside what Calisto Proposals charges
What Prospero publishes, beside what Calisto Proposals charges. No figure is converted between currencies; a rate is shown only where it is published.
Calisto Proposals
Calisto catalog price
Prospero publishes no list price in EUR.
Prospero prices as published on September 13, 2026.Source
WHAT A SEAT DOES NOT COVER
The seat is the start of the bill, not the end of it.
What Prospero prices separately, beside what a Calisto proposal already carries.
The rate, times every member
Prospero's monthly rate multiplies by each team member, and 25 members is custom pricing. A Calisto proposal is charged once, however many people helped write it.
Approval before it goes out
Calisto holds a proposal at or above your approval amount for internal review before it can be sent. Prospero's feature list does not include approvals.
Interest by option
Prospero tracks opens and how long a proposal was open. Calisto shows the time on each page and how long each option tier was in view.
Honest answers
Leaving Prospero
Do my proposals move across?
Sent and signed proposals stay with Prospero, with their signatures. Export them before you close the account. Templates rebuild in the block editor, and every proposal you send from Calisto keeps its own version history.
Can I get out of my current contract?
Upload the contract from the offer above. We read the term, the fees and the notice period, and hold what leaving costs you as credit in your Calisto wallet. Cancel, show us the proof, and it is released. A person reviews some claims, such as a contract in another currency.
What does a proposal cost?
The pricing section on this page reads the live catalogue and is the authority on the figure. A proposal is charged once, when it first reaches your client. The signature, every signer, reminders, re-sends and new versions are inside that charge. Quotes cost nothing.
Is anything charged on top?
Two things, both stated plainly. A government ID check on a signer is its own product, priced per check. A change order signed after the proposal is accepted is its own envelope, charged as Calisto Sign.
What does Prospero do that Calisto Proposals does not?
The table above says so plainly. Scheduled follow-up reminders and AI writing are theirs; the deal, the price book, the approval and the payment the proposal belongs to are ours.
En savoir plus
Everything Calisto does here
The pages behind this comparison: the sector, the apps and the guides.