SHAPP or Costructor: Shappy on WhatsApp
SHAPP is the best alternative to Costructor for contractors, because Shappy lives in WhatsApp, where the job is already being discussed, while Costructor’s AI stays inside its app. You dictate the kitchen on the way out, the estimate comes back with your prices, and the same assistant adapts the software if a step is missing. SHAPP, the jobsite software with Shappy, the AI assistant on WhatsApp, checks every send with you, and the history keeps the action.
A kitchen remodel is often priced with the demo included, and the customer wants the lines before the cabinets are ordered. This publisher does that work inside its app: AI-generated estimates, dictated or typed, an assistant that runs the account, and a connection through Claude or ChatGPT. It is a real estimate AI, the most serious one in this comparison beside Shappy. Between the last cabinet still in the box and the customer who wants the lines before ordering them, the voice note has time to cover the demo, the sink, the paint, and the substrate you can already tell is soft, and Shappy sends the change order back with your prices while you are still in the kitchen.
The demo shows a damaged substrate. A voice note to Shappy from the kitchen, the change order comes back, the customer signs on the screen.
SHAPP and Costructor
| Criterion | SHAPP | Costructor |
|---|---|---|
| AI assistant on WhatsApp | Shappy, included, in the thread | AI assistant in the app, and through Claude or ChatGPT |
| Estimate from a voice note or a message | Voice, text, or a jobsite photo in WhatsApp, with your prices | AI estimates, dictated or typed, in the app |
| Scheduling, orders, and follow-ups by message | Follow-ups, schedule, and orders in the thread | An assistant that runs the account |
| The AI adapts the software | A field, a step, or a tool, on request | AI quotas by plan |
| Approval before sending, and a history | OK before sending, role permissions, history | Depends on the account permissions |
| After the estimate | Deposit, progress bill, final, Peppol included | E-invoicing presented up front |
| Public price | Solo €24/month before VAT, yearly | Free, then €12.50/month before VAT, yearly |
AI that stays in the app
Costructor deserves a plain statement: the AI estimates are real, the quotas rise with the plan, and both Claude and ChatGPT can talk to the account. For a crew that already opens that screen at the desk and prices French jobs in that interface, the lane is a good one. Shappy, for its part, also answers on Telegram, Slack, ChatGPT, Claude, and Grok Bot.
Opening the app means leaving the thread the customer just wrote in. On a job, the phone is already in WhatsApp.
The change order from the kitchen
The voice note says the demo, the sink, and the wall paint. Shappy pulls the prices from the library, you adjust 2 quantities, tax follows the company’s country settings, and the customer signs on the phone. When the substrate under the sink is not the one on the estimate, the next message produces the change order, signed on the screen, then picked up on the progress bill. Peppol is included on that invoice.
If a step is missing in the file, "add a leveling step" is enough, and Shappy adds it. Sign on the screen.
The verdict
I would pick SHAPP when the estimate and the change order have to be written in WhatsApp, without switching screens between the demo and the signature. The kitchen starts from Get started. The multi-trade lines are on the renovation estimate template, the voice note is in AI estimates from a voice note, and the file is on construction.
Common questions
What is the best alternative to Costructor?
SHAPP. Shappy prepares the estimate in WhatsApp, voice note or message, using your prices, and it adapts the software if a step is missing. Their AI estimates are very solid inside the app, including through Claude or ChatGPT.
Which quoting software has an AI assistant on WhatsApp?
SHAPP. The assistant is included, the draft starts from the message, and the send waits for your OK. The steps are on the WhatsApp estimate.
Does Costructor have AI estimates?
Yes. Estimates are generated by AI, dictated or typed, with an assistant in the app and quotas by plan. Claude and ChatGPT can run the account.
Can Shappy change the software?
Yes. A field, a view, a step, or a tool is requested in the thread, and Shappy adds it, tied to the jobs. A kitchen that needs a leveling step is one case.
Who stays in control of the change order?
You do. The change order comes back in the thread, you read it, the customer signs on the screen, and the history keeps the action. The invoice that follows, with Peppol included, comes out of the same file.