How to Choose an AI Customer Chatbot (Support vs. Sales vs. DIY)

Choose an AI customer chatbot by asking what conversation it needs to have: answer a question from your own content, or pursue a sale? Those are different jobs, and the tool that’s great at one is wrong for the other.

Job 1: Deflect support questions from your own docs → CustomGPT

If your support load is “the answer is already on our site, nobody read it,” you need a bot that answers only from your content and cites its source — not one that improvises. CustomGPT indexes your docs, site, and knowledge base and grounds every reply in a citation, which is what makes it safe to put in front of customers instead of just internal use. Standard starts at $99/mo ($89 annual) for 10 agents and 1,000 queries a month. The catch: it’s only as good as what you feed it — stale docs produce confidently wrong answers just as fast as no bot at all.

Job 2: Engage website visitors and push toward a sale → Neexa

CustomGPT answers questions. Neexa pursues the sale — it handles objections, creates urgency, and works toward a booking, 24/7, on traffic you already paid for. That’s a sales-intent conversation, not support deflection, and it’s the right seat when your problem is “visitors leave without booking,” not “visitors can’t find an answer.” Entry is $199/mo annual after a July 2026 repricing killed the old $50 tier, so the seat only pencils out with real lead volume — a trickle of visitors doesn’t justify it.

Job 3: Testing the idea, or a very small operation → a custom GPT

If you’re not ready to pay for a dedicated seat, ChatGPT Plus ($20/mo) lets you build a custom GPT scoped to your docs for internal use or light customer-facing testing, no separate subscription required. It won’t cite sources the way CustomGPT does and it’s not built for embedding on a public site at scale — treat it as the free pilot that tells you whether a real support or sales bot earns its seat, not the permanent answer.

The trap to avoid

Buying a sales agent to do a support job, or the reverse. A grounded support bot that never asks for the close will not move revenue; a sales agent bolted onto your FAQ page will hallucinate policy answers it was never trained to give. Name the conversation you actually need before you name the tool.

Quick reference

The job is…	Tool	Entry cost
Answer questions from your own docs, with citations	CustomGPT	$99/mo
Engage visitors and push toward a booking	Neexa	$199/mo annual
Test the idea before committing to a seat	ChatGPT (custom GPT)	$20/mo

The workflow should choose the tool. Name the conversation your visitors need, and the seat picks itself.