Chatbase vs SiteGPT, compared honestly.
They are the two AI chatbot builders everyone compares. Both train an agent on your content and put it on your website. The difference that actually costs you money is how each counts a message: Chatbase charges credits that change with the model, and SiteGPT counts every question and its reply together.
The short answer
Pick Chatbase if you need actions, voice or a wide model catalogue and can budget for model-weighted credits. Pick SiteGPT if you want predictable message counts and many content sources, and can accept no free plan and a branding add-on. Consider AISupportForge if you want one reply to always mean one reply, a permanent free plan, a WordPress plugin, and no branding fee.
Side by side
| AISupportForge | Chatbase | SiteGPT | |
|---|---|---|---|
| Free plan | permanent, 50 replies | 50 credits, economy model only | 7-day trial, then paid |
| Entry plan | $14.99 for 250 replies | $40 for 500 credits | $39 for 4,000 messages |
| One unit | one reply, always | 1 to 5 credits, by model | a question plus its reply |
| Remove branding | included on paid plans | about $1,188 a year | +$39 a month |
| Auto-refresh knowledge | free on every plan | Standard ($150) and up | Growth ($79) and up |
| WordPress plugin | yes, in the directory | yes | snippet embed |
Figures are each vendor's published rates as of August 2026. Chatbase charges one to five credits per reply depending on the model; SiteGPT counts a question and its reply together as one message, and sells branding removal as a monthly add-on. Check their pricing pages yourself before deciding; we would rather you did.
The difference that costs you money
Chatbase sells credits, but a credit is not a reply. It is one to five credits depending on the model, so 500 credits answers as few as 100 questions if you switch on a stronger model. The number on the plan is not the number of questions your visitors get answered.
SiteGPT is clearer that it counts messages, but a message is a question plus its reply. A plan that says 4,000 messages is closer to 2,000 answered questions, and the count shifts again with the model. Then removing their branding is another $39 a month on top of your subscription.
AISupportForge runs one model, Claude Haiku 4.5, and one credit is one reply, always. Reading your pages, building your knowledge base and reviewing conversations are all free. There is no model arithmetic and no branding line item.
When to pick each
Pick Chatbase if
You need AI actions like bookings and payments, voice or phone agents, or a wide model catalogue, and you are comfortable paying the Standard or Pro price and managing credit multipliers.
Pick SiteGPT if
You want many content sources, several chatbots on one account, and predictable message counts, and you accept a 7-day trial instead of a free plan and a $39 a month branding add-on.
Consider AISupportForge if
You want an agent that answers from your own pages at a flat, predictable price, a real free plan to start on, and a WordPress install with no code and no branding fee. Most small and mid-size sites land here.
What neither one changes
Both are mature, well-rated products, and if you are already happy with one, stay. This page exists because the two are compared so often that the comparison itself is what people search for. The real decision is simpler than the feature grids: do you want to do arithmetic to know what you are paying, or not? That is the question that most reliably predicts whether a chatbot stays on a site or gets cancelled after the first surprise bill.
Questions
Is Chatbase or SiteGPT cheaper?
It depends on your volume and which model you use. Chatbase credits cost one to five each depending on the model, so the same plan answers fewer questions on stronger models. SiteGPT counts every question and its reply as one message, and has no permanent free plan plus a monthly branding add-on. At most small-site volumes a flat per-reply price is simpler to compare than either.
Does Chatbase have a free plan?
Yes, 50 credits a month, but the free plan is limited to economy models and carries a Powered by Chatbase badge.
Does SiteGPT have a free plan?
No. SiteGPT offers a 7-day trial on its paid plans rather than a permanent free tier.
Which one has a WordPress plugin?
Chatbase offers a WordPress plugin, and AISupportForge is in the WordPress plugin directory. SiteGPT is embedded with a JavaScript snippet.
Why is AISupportForge on a Chatbase vs SiteGPT page?
Because a lot of people comparing the two are really looking for a simpler third option: flat pricing where one reply is one reply, a permanent free plan, and no branding fee. We show the numbers and let you decide.
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