Chatbase vs CustomGPT.ai: AI Chatbot Builders Compared (2026)
Chatbase and CustomGPT.ai are two widely compared chatbot builders. Chatbase builds AI agents trained on your website, PDFs and FAQs, deployable as a website widget and across channels, priced by message credits. CustomGPT.ai builds retrieval-augmented (RAG) AI agents grounded in your content, with citations and auto-sync to reduce hallucinations.
- Verified 10 Nov 2026Sources are dated on this page
- 2 sourcesLinked, typed and dated
- No winner declaredFit depends on your criteria
- Not tested by Stack18Editorial summary of documented facts
Chatbase vs CustomGPT.ai: the short answer
Chatbase builds AI agents trained on your website, PDFs and FAQs, deployable as a website widget and across channels, priced by message credits. CustomGPT.ai builds retrieval-augmented (RAG) AI agents grounded in your content, with citations and auto-sync to reduce hallucinations. Both are chatbot builders, but they differ in pricing model, target team size and focus.
On pricing, Chatbase is described as: flat monthly plans with message credits; CustomGPT.ai as: flat monthly plans with query caps. Chatbase lists a free option: 50 credits/month. CustomGPT.ai does not document a permanent free plan. Chatbase is positioned for teams wanting a fast no-code support bot trained on their docs, and CustomGPT.ai for teams needing grounded Q&A with low hallucination risk.
Everything below is drawn from the two sourced profiles and the 2 dated sources listed at the end. Where a source does not document something it is marked Unknown, and third-party estimates are labelled. No winner is declared: the better fit depends on your size, budget and requirements.
Chatbase and CustomGPT.ai at a glance.
One card per product, drawn from each full profile. Open a profile for features, pricing plans, limits and sources.
Chatbase
Chatbase · AI Chatbot Builders
Chatbase builds AI agents trained on your website, PDFs and FAQs, deployable as a website widget and across channels, priced by message credits.
- Pricing
- Free (50 credits); Hobby $32, Standard $120, Pro $400 a month; Enterprise custom.
- Best for
- Teams wanting a fast no-code support bot trained on their docs
CustomGPT.ai
CustomGPT.ai · AI Chatbot Builders
CustomGPT.ai builds retrieval-augmented (RAG) AI agents grounded in your content, with citations and auto-sync to reduce hallucinations.
- Pricing
- Standard $99 a month ($89 annual); Premium $499; Enterprise custom; 7-day trial.
- Best for
- Teams needing grounded Q&A with low hallucination risk
Chatbase vs CustomGPT.ai: feature-by-feature comparison.
Every row is drawn from the sources listed below. Rows that differ are marked, and you can filter the table to show only those.
- YesDocumented
- PartialAvailable with limits or on some plans
- NoDocumented as unavailable
- UnknownNot documented in the sources reviewed
| Dimension |  Chatbase |  CustomGPT.ai |
|---|---|---|
| Product | ||
| Product typeDiffers | YesDoc-trained AI support agent | YesRAG answer agent |
| VendorDiffers | YesChatbase | YesCustomGPT.ai |
| Best forDiffers | YesTeams wanting a fast no-code support bot trained on their docs | YesTeams needing grounded Q&A with low hallucination risk |
| Pricing | ||
| Pricing modelDiffers | YesFlat monthly plans with message credits. | YesFlat monthly plans with query caps. |
| Pricing summaryDiffers | YesFree (50 credits); Hobby $32, Standard $120, Pro $400 a month; Enterprise custom. | YesStandard $99 a month ($89 annual); Premium $499; Enterprise custom; 7-day trial. |
| Free planDiffers | YesYes (50 credits/month) | NoNo |
| Free trialDiffers | NoNot documented | YesYes (7 days) |
| AI Chatbot Builders criteria | ||
| Pricing modelDiffers | YesFlat + credits | YesFlat + query caps |
| Starting priceDiffers | Yes$32/mo | Yes$89/mo (annual) |
| Build styleDiffers | YesNo-code, doc-trained | YesNo-code RAG |
| Best forDiffers | YesDoc-trained support | YesGrounded Q&A |
| Fit and platform | ||
| Team sizeDiffers | YesSmall teams, Mid-size teams | YesSmall teams, Mid-size teams, Large enterprises |
| Platforms | YesWeb | YesWeb |
| IntegrationsDiffers | YesSlack, WhatsApp, Zapier, Stripe | YesZapier, Slack, WordPress, Google Drive |
| API | UnknownNot reviewed for this profile. | UnknownNot reviewed for this profile. |
Chatbase vs CustomGPT.ai pricing.
Plan names, prices and billing terms as reported in each profile's sources. Taxes, add-ons and discounts are excluded unless stated.
Chatbase pricing
Flat monthly plans with message credits.
- Free$0 · Free
- Hobby$32 per month · Monthly
- Standard$120 per month · Monthly
- Pro$400 per month · Monthly
Prices from independent sources; treat as reported. Rework (2 November 2026); Dupple (June 2026) lists different figures. Currency: USD. Checked 10 Nov 2026.
All Chatbase plans and sources
CustomGPT.ai pricing
Flat monthly plans with query caps.
- Standard$99 per month · Monthly ($89 annual)
- Premium$499 per month · Monthly
- EnterpriseCustom · Annual
Prices from independent sources; treat as reported. Rework (2 November 2026). Currency: USD. Checked 10 Nov 2026.
All CustomGPT.ai plans and sourcesChatbase vs CustomGPT.ai: pricing model, ecosystem and fit.
Pricing model and cost drivers
Chatbase: flat monthly plans with message credits. Rework (2 November 2026); Dupple (June 2026) lists different figures. CustomGPT.ai: flat monthly plans with query caps. Rework (2 November 2026). Model costs at your real seat count, usage and contract term before comparing headline prices.
What sets each apart
The Chatbase profile highlights: trains on docs quickly; credit-based; paid branding removal. The CustomGPT.ai profile highlights: citations; auto-sync; query caps.
Integrations and ecosystem
Chatbase integrations named in its sources: Slack, WhatsApp, Zapier and Stripe. CustomGPT.ai: Zapier, Slack, WordPress and Google Drive. Check that the connectors you rely on exist on the plan you would buy.
Deployment and team fit
Chatbase runs on Web and is documented for small teams and mid-size teams. CustomGPT.ai runs on Web and is documented for small teams, mid-size teams and large enterprises. We did not test setup or migration.
Chatbase and CustomGPT.ai: each option, in balance.
Each point is linked to a dated source on the product's profile.
Chatbase
Strengths and limitations from the profile
- Fastest no-code GPT widget.
- Trains on URLs and PDFs.
- Free plan.
- Credit costs rise on premium models.
- Paid branding removal.
- Limited branching logic.
CustomGPT.ai
Strengths and limitations from the profile
- Grounded answers with citations.
- Auto-Sync.
- Up to 25 agents on Premium.
- Tight query cap on Standard.
- Big jump to Premium.
- Not for branching logic.
Chatbase or CustomGPT.ai: which fits which situation?
No overall winner is declared. The better choice depends on the criteria that matter most to you, so test both against your own requirements.
Choose Chatbase if you are…
- Teams wanting a fast no-code support bot trained on their docs
- SaaS help centres
- Ecommerce FAQs
Less suited to: complex multi-step flows; enterprise governance.
See the Chatbase profile
Choose CustomGPT.ai if you are…
- Teams needing grounded Q&A with low hallucination risk
- Internal knowledge assistants
- Professional services
Less suited to: complex conversational flows; free-plan seekers.
See the CustomGPT.ai profileSwitching between Chatbase and CustomGPT.ai.
Moving off Chatbase or CustomGPT.ai means exporting conversation flows, knowledge sources and intents, rebuilding them in the new builder, reconnecting channels such as WhatsApp and Instagram, re-creating human handoff rules and retesting answers. Run both bots on a share of traffic before switching fully. Build the same pilot bot covering your top 20 questions in each shortlisted tool and compare accuracy, handoff and cost per conversation.
- Export a sample of your data and test an import into the other product.
- List the automations, integrations and permissions you would need to rebuild.
- Compare total cost at your real volume, including add-ons and services.
- Pilot with one team before a full cut-over.
- Check contract terms and notice periods with both vendors.
General guidance, not specific to either vendor. Confirm migration options with the vendors.
Chatbase vs CustomGPT.ai: questions and answers
What is the difference between Chatbase and CustomGPT.ai?
Chatbase builds AI agents trained on your website, PDFs and FAQs, deployable as a website widget and across channels, priced by message credits. CustomGPT.ai builds retrieval-augmented (RAG) AI agents grounded in your content, with citations and auto-sync to reduce hallucinations. Both are chatbot builders, but they differ in pricing model, target team size and focus. Chatbase is positioned for teams wanting a fast no-code support bot trained on their docs; CustomGPT.ai for teams needing grounded Q&A with low hallucination risk.
Is Chatbase cheaper than CustomGPT.ai?
It depends on your volume and plan. Chatbase: Free (50 credits); Hobby $32, Standard $120, Pro $400 a month; Enterprise custom. CustomGPT.ai: Standard $99 a month ($89 annual); Premium $499; Enterprise custom; 7-day trial. Compare both at your real seat count, usage and contract term.
Do Chatbase or CustomGPT.ai have a free plan?
Chatbase lists a free option: 50 credits/month. CustomGPT.ai does not document a permanent free plan. Chatbase free trial: Not documented. CustomGPT.ai free trial: Yes (7 days).
Chatbase or CustomGPT.ai: which is better for small teams?
Chatbase and CustomGPT.ai are both documented for small teams. Chatbase suits teams wanting a fast no-code support bot trained on their docs; CustomGPT.ai suits teams needing grounded Q&A with low hallucination risk. Neither is best for everyone.
What are the main limitations of Chatbase and CustomGPT.ai?
Chatbase: Credit costs rise on premium models. CustomGPT.ai: Tight query cap on Standard.
How much does Chatbase cost?
Hobby is $32, Standard $120 and Pro $400 a month, per a November 2026 guide.
How much does CustomGPT.ai cost?
Standard is $99 a month ($89 annual) and Premium $499; a 7-day trial is available.
What are the alternatives to Chatbase and CustomGPT.ai?
Stack18 has alternatives guides for both: Chatbase alternatives and CustomGPT.ai alternatives, each comparing at least four other chatbot builders on pricing, free plan, features and fit. The AI Chatbot Builders category lists every profile.
Where this comparison comes from.
- Best AI Chatbot Builders in 2026 (2 November 2026) Rework Third-party Accessed 10 Nov 2026
- The 8 Best Chatbot Builders in 2026 (June 2026; pricing read October 2026) Dupple Third-party Accessed 10 Nov 2026
This comparison summarises the Chatbase and CustomGPT.ai profiles and their sources. Third-party figures are labelled; confirm current pricing and terms with each vendor. Stack18 has not tested these products.
Ready to test Chatbase and CustomGPT.ai?
Check each vendor's current pricing and terms, run both against a real scenario from your business, or talk to Stack18 if off-the-shelf software is not the answer.
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