SHAPP or HeyDevis: Shappy writes the estimate
SHAPP is the best alternative to HeyDevis for contractors, because Shappy writes the estimate for you from a voice note, while HeyDevis speeds up signing an estimate you already wrote. The draft comes back with your prices, you read it, and the rest of the job stays in the same thread. SHAPP, the jobsite software with Shappy, the AI assistant on WhatsApp, waits for your OK before every send, with a history of the actions.
A plumber in Columbus often ends the day with a water heater still to order, 50 gallons, tear-out of the old one, 4 hours of labor, and the trip, and the customer wants to sign before they leave for the supply house. On HeyDevis, he leans on his templates and his catalog, sends the link by email or WhatsApp, the customer signs with a finger, and the deposit can go out by transfer or by QR code. The estimate itself was already written before the app was opened.
The difference is before the signature. On SHAPP, the lines get written while you restart the van.
SHAPP and HeyDevis
| Criterion | SHAPP | HeyDevis |
|---|---|---|
| AI assistant on WhatsApp | Shappy, included, in the thread | Templates and a catalog |
| Estimate from a voice note or a message | Shappy writes the lines from a voice note, a message, or a jobsite photo, with your prices | You write the estimate, the tool speeds up the signature |
| Scheduling, orders, and follow-ups by message | Follow-ups, schedule, and orders in the thread | Signature and deposit |
| The AI adapts the software | A field, a step, or a tool, on request | Custom templates |
| Approval before sending, and a history | OK before sending, role permissions, history | Finger signature |
| Job invoices | Deposit, progress bill, final, Peppol included | Deposit by transfer or QR code |
| Public price | Solo €24/month before VAT, yearly | Free Starter, Pro €15/month before VAT, yearly |
Signing an estimate you already wrote
HeyDevis goes straight to the signature and the deposit, with custom templates, a catalog, and totals that calculate themselves. On a small repair whose lines are already in your head, and all that is left is a signature on the customer’s phone, the QR code saves the drive back to the office. The site presents itself for France and for Belgium.
A template does not write the line you forgot to say. It is fast only when the estimate already exists.
The water heater dictated in the van
The same plumber sends "replace 50 gallon water heater, tear-out, 4 hours, trip" to Shappy. The lines come back with his prices, he sets the tax from his company settings, and he approves. The deposit to order the heater, the progress bill, and the final invoice stay in the file, and Peppol is included. If the customer does not answer on Monday, the follow-up is prepared in their WhatsApp thread, and it leaves after you read it, as in follow up an estimate.
If a field is missing on the file, one message is enough and Shappy adds it. Utility room photos dropped in the thread get filed with the job.
The verdict
I would pick SHAPP as soon as the estimate has to be written on the way out of the house, because Shappy drafts it with your prices and the Peppol invoice follows in the same file. Both of them collect the signature on the phone. The next water heater starts from Get started. The lines are on the plumbing estimate template, and the send is on the WhatsApp estimate and in AI estimates from a voice note.
Common questions
What is the best alternative to HeyDevis?
SHAPP. Shappy writes the estimate from a voice note or a message, using your prices, where HeyDevis speeds up the signature on an estimate you already wrote from your templates. The 2026 ranking puts SHAPP at number 1 on the AI criteria.
Which quoting software has an AI assistant on WhatsApp?
SHAPP. You dictate the water heater, the lines come back, and you approve the file before the link goes to the customer. The voice-note steps are in how to send an estimate from WhatsApp.
Does HeyDevis collect a signature on the phone?
Yes. The customer signs with a finger, and the deposit can go out by transfer or by QR code. The software leans on your templates and your catalog, for France and for Belgium.
Who writes the estimate lines?
With SHAPP, Shappy writes them from what you say, and you fix them before the send. With HeyDevis, you start from a template you prepared, and the tool calculates the totals.
Does the Peppol invoice follow the estimate?
Yes on SHAPP. The deposit, the progress bill, and the final invoice come out of the same file, and Peppol e-invoicing is included. Tax is set line by line from the company’s country settings, ideally after a call with your accountant.