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TL;DR
CustomGPT starts at $99/month with no free plan, locks its Standard tier to a single model, and routes human handoff into your existing helpdesk. SiteSpeakAI starts at $29/month with a free plan, model choice across OpenAI, Anthropic, Google, and xAI, and a built-in inbox for live chat and human takeover.
We compared the top CustomGPT alternatives on price, live chat, human handoff, and AI model choice. Here is how they stack up.
CustomGPT is known for accurate, source-cited answers, but it asks for a premium price and locks down a few things teams expect.
CustomGPT only offers a 7-day trial that requires a card. SiteSpeakAI has a free plan, so you can build and test a chatbot before paying anything.
Compare features and see why SiteSpeakAI is the better choice
| Features | SiteSpeakAI | CustomGPT |
|---|---|---|
| Free Plan | ✓ Yes | × No (7-day trial only) |
| Starting Price | From $29/month | From $99/month |
| AI Models | OpenAI, Anthropic, Google, xAI | OpenAI, Anthropic, Google |
| Per-agent Model Choice | ✓ Yes | Enterprise only |
| Built-in Live Chat | ✓ Yes | ✓ Yes |
| Native Human Takeover | ✓ Yes | × No (routes to external helpdesk) |
| API Access | ✓ Yes | ✓ Yes |
| Multilingual | ✓ Yes | ✓ Yes (92 languages) |
A simple step-by-step guide to migrate without losing conversations.
Digital Marketing Manager
The platform is very intuitive to set up and use. I was able to train the chatbot directly from our site maps with ease. After creating a test page and sharing it with leadership, customer service, sales, and marketing, the reaction was unanimous, everyone was impressed!
Marketer
I think SiteSpeak is a super easy and extremely powerful tool to start installing into your website.
Founder
I stumbled across SiteSpeak AI while having a chat with my ChatGPT. I am absolutely gobsmacked at how good it is and how easy it has been to setup. Any concerns I had have disappeared and this certainly is the way forward. I will be using SiteSpeak AI on all my websites now.
Everything you need to know about SiteSpeakAI. Can’t find what you’re looking for? Start a free trial and see it in action.
CustomGPT has built a reputation for accurate, source-cited answers and strong anti-hallucination handling. If citation accuracy is your single priority and budget is not a constraint, it is a respected option. SiteSpeakAI also grounds answers in your own content and cites sources, using retrieval with reranking, and it does so at a lower price with fewer restrictions.
The practical differences show up in three places: the free plan, model choice, and human handoff.
CustomGPT has no free plan, only a 7-day trial that needs a card, and starts at $99/month. SiteSpeakAI has a free plan and starts at $29/month, so you can build and test on a real site before paying.
Model choice is the other gap. CustomGPT’s Standard plan is locked to a single model, and choosing the model per agent is reserved for its Enterprise tier. SiteSpeakAI lets you pick from OpenAI, Anthropic, Google, and xAI on paid plans, and bring your own keys on Pro.
When a conversation needs a person, CustomGPT routes it into the external helpdesk queue your team already runs. That works if you already pay for a helpdesk, but it means another tool in the loop. SiteSpeakAI includes its own inbox, so a human can take over the live conversation in the same place your visitors are chatting.
For teams that want grounded answers plus a free plan, real model choice, and built-in live chat, SiteSpeakAI covers more of the job for less.
