No.
You don't need a CRM.
Why
Fewer than 10 inquiries a month is roughly two a week. You can hold that in your head, let alone in a phone. What you actually need is for those WhatsApp messages to not get buried under personal chats, and for repeat customers to be recognisable when they message again. That's a labels-and-habits job, not a software job.
What you actually need
- WhatsApp Business app (free) — install it, set your menu / hours / address in the business profile, and turn on a greeting message so nobody waits while you're at the oven.
- WhatsApp Business labels (free, built-in) — create three: "New order", "Today's pickup/delivery", "Regular". Tag every chat. Regulars get faster replies and you stop re-asking them their address.
- A habit — the pre-service check — 30 minutes before lunch and dinner service, open WhatsApp, clear anything in "New order", confirm anything in "Today's pickup/delivery". Nothing slips because there's a fixed time you look.
Do this today
Open WhatsApp Business → Settings → Business tools → Labels → tap '+' and create "New order", "Today's pickup/delivery", "Regular". Then go through your last two weeks of chats and label every one. By tonight's service you'll open the app and see exactly who's waiting on you without scrolling.
What to ignore
Ignore anything from HubSpot, Zoho Bigin, Pipedrive, or a "restaurant CRM" sales rep promising loyalty automation and SMS marketing — at under 10 inquiries/month, paying even $15/mo for software costs you more in setup time than it saves. Skip WhatsApp API tools like Wati or Respond.io too; those start making sense at hundreds of chats a week, not eight.
What doing nothing costs you
At under 10 inquiries/month, the dollar leak is small — but every missed WhatsApp from a potential regular is a customer who orders from the next pizzeria instead and never comes back. The compounding loss is reputation, not revenue: pizza customers talk.
When to revisit this
When you're getting more than 10 orders a day on WhatsApp, or when you hire someone to help take orders during service.