Quick verdict: ChatRaj for website chatbots, CustomGPT for internal document assistants
ChatRaj and CustomGPT.ai both fall under the broad "AI chatbot SaaS" category, but they're actually optimized for partly-different jobs.
ChatRaj is built around the website-embed use case: visitor lands on your site, opens a chat bubble, asks a question, gets an answer from your published web content. The pricing, the iframe widget, the multi-language auto-detect, the lead-capture flow, the script-tag install: all of it is shaped by the assumption that the bot lives on your website and talks to anonymous visitors.
CustomGPT.ai is built around the document-assistant use case: you have a library of PDFs, Word documents, spreadsheets, PowerPoint decks, internal manuals, contracts, or research papers, and you want an AI assistant that can answer questions across all of them. The pricing, the agent-count limits, the broad file-format support (over 50 formats including .mbox and .rtf), and the enterprise compliance focus are shaped by that document-heavy assumption.
The product surfaces look similar (both call themselves AI chatbots, both let you embed a widget, both have dashboards), but if you optimize the same product for both use cases you end up with awkward compromises. CustomGPT is excellent at the document-library job. ChatRaj is excellent at the website-embed job. For the use case where they overlap (a chatbot trained on your website + a few PDFs, embedded on your site), either works, and the pricing difference becomes the deciding factor.
Per-query versus per-message pricing: the math that surprises operators
CustomGPT.ai and ChatRaj use different pricing units, and the difference matters more than it first appears.
- ChatRaj Pro: $29/month flat for 10,000 messages. $0.0029 per visitor turn.
- CustomGPT Standard: $99/month for 1,000 queries. $0.099 per query.
A "query" in CustomGPT corresponds approximately to one visitor turn (one question and the AI's answer). A "message" in ChatRaj is the same unit. So at the lowest paid tier, CustomGPT charges roughly 34 times more per visitor interaction than ChatRaj.
The wide gap reflects positioning, not inefficiency. CustomGPT's Standard plan is designed for low-volume, high-substance interactions inside a document-heavy workflow (a few dozen employees querying a corpus of legal contracts, for example). It is NOT designed for website embed at scale. If you put CustomGPT Standard on a website and got 500 visitors per day, your cost per visitor would be unsustainable.
For website-embed use cases, CustomGPT becomes economically viable only at the Premium tier ($499/month for 5,000 queries, or $0.0998 per query), which is still meaningfully more expensive per visitor than ChatRaj. The Premium plan's appeal comes from features (25 agents, Auto-Sync, broader file format coverage), not from raw cost.
At the message-volume end of the spectrum (50,000 messages per month, typical mid-market SMB website), ChatRaj's Growth plan at $99/month covers it. CustomGPT would require a custom Enterprise contract.
What both products do (the genuine overlap)
There IS a shared baseline where the two products are functionally equivalent. Both:
- Train a chatbot on knowledge sources (URLs, files, sitemaps).
- Embed via a script tag on your site (CustomGPT supports this too; it's not the primary use case but it works).
- Auto-detect the visitor's language and reply in the same language.
- Stream the LLM's response to the visitor token-by-token.
- Capture leads from chat conversations and export to CSV or webhook.
- Sign GDPR Data Processing Agreements with paid customers.
- Offer custom branding (theme color, avatar, welcome message).
- Run the visible widget inside an iframe for CSS and JavaScript isolation.
If you only care about items on this list, both products will technically work. The pricing gap (documented above) is then the deciding factor.
Where CustomGPT legitimately wins
The honest version. These are real advantages CustomGPT has over ChatRaj.
File format breadth. CustomGPT supports over 50 file formats including PDF, Microsoft Word (.doc and .docx), Excel (.xls and .xlsx), PowerPoint (.pptx), Google Docs/Sheets/Slides, plain text, Markdown, HTML, RTF, and even email archives (.mbox). ChatRaj supports PDF, Word, plain text, Markdown, CSV, XLSX, and HTML, which covers the common cases but misses some long-tail formats. For document-heavy use cases that involve PowerPoint slides, archived emails, or specialized formats, CustomGPT is the closer fit.
Higher agent count per plan. CustomGPT Standard ($99/mo) includes 10 agents. Premium ($499/mo) includes 25 agents. ChatRaj's equivalent tiers cap at 3 (Pro) and 10 (Growth) bots. For organizations running many distinct chatbots (one per department, one per product line, one per language), CustomGPT's agent count gives more headroom before hitting Enterprise pricing.
Auto-Sync technology on Premium. CustomGPT Premium includes Auto-Sync, which automatically re-indexes connected knowledge sources on a schedule. For document-heavy use cases where the underlying corpus changes frequently (legal contract updates, product specification revisions, internal handbook updates), Auto-Sync removes operator work. ChatRaj's source refresh is manual on all plans today; daily auto-refresh is on our 2026 roadmap.
Enterprise compliance focus. CustomGPT's Enterprise tier includes SOC 2 compliance, dedicated account management, custom integrations, SLA guarantees, and additional security features. For procurement teams at regulated organizations (financial services, healthcare, legal), CustomGPT's compliance posture is more developed than ChatRaj's at the equivalent stage of growth.
Stronger document-citation quality. Because CustomGPT was built around document-library use cases, its citation rendering is tuned for documents (page number references, document section labels, file name attribution). ChatRaj's citations are tuned for web content (URL attribution, page section anchors). Both work; CustomGPT's citation polish is noticeably better when the source is a 400-page PDF.
Where ChatRaj legitimately wins
The other side of the same honesty.
Per-message cost at every tier, at meaningful volumes. Documented above. For website-embed use cases at SMB and mid-market message volumes, the cost difference is significant enough to be the dominant factor.
Website-embed UX polish. The ChatRaj widget was designed iteratively around the website-embed scenario: the floating bubble, the mobile drawer, the suggested-question chips, the inline citation pills, the post-conversation CSAT prompt. CustomGPT's widget works but reads as adapted from a different use case, with a less polished feel for marketing-site visitors.
Hybrid retrieval (BM25 + semantic + RRF). ChatRaj runs keyword search and semantic search in parallel and fuses them via Reciprocal Rank Fusion. CustomGPT uses semantic retrieval. For website knowledge bases with product SKUs, version numbers, or specific terminology, hybrid retrieval consistently surfaces better citations. For free-form documents, both retrieval styles perform similarly.
Flat monthly quota with no per-message overage at SMB tiers. ChatRaj Pro is $29 for 10,000 messages and stops. CustomGPT Standard is $99 for 1,000 queries and charges for additional queries at the Standard rate; bursty traffic on Standard can produce surprising end-of-month bills.
Free tier rather than time-limited trial. ChatRaj's free plan (100 messages per month) is permanent for indefinite evaluation. CustomGPT's free option is a 7-day trial of the paid features, after which you commit or churn. The free-tier model is more buyer-friendly for teams that want to evaluate over several weeks.
Lower friction installation for non-document use cases. If your knowledge base IS your website (typical for SMBs and indie hackers), ChatRaj's setup is genuinely 60 seconds. CustomGPT's setup involves agent configuration, file management, and knowledge-source organization that's more substantive: appropriate for document-library use cases, overkill for website-only.
When you might actually need both products
A scenario the other comparison pages don't address, because it's specific to CustomGPT's positioning.
If your organization has BOTH a public website AND an internal document library, and you want chatbots for both audiences, you might genuinely use ChatRaj for the website chatbot AND CustomGPT for the internal document assistant. The two products serve different audiences (anonymous public visitors vs authenticated internal employees) and the cost structures match the audiences (ChatRaj's high-volume low-cost-per-message vs CustomGPT's low-volume high-substance-per-query).
This is not a hypothetical: several teams we've talked to run ChatRaj for their marketing site and a separate enterprise-document tool for their internal employee assistant. The two roles don't overlap, and forcing one product to do both creates compromises in both directions.
If this matches your situation, the right move is not to pick a single product but to deploy each one for its natural job. The cost is approximately ChatRaj Pro ($29/mo) plus CustomGPT Standard or Premium for the internal assistant, and the operator complexity is lower than trying to make either product handle both jobs.
Compliance posture: where CustomGPT's enterprise focus actually matters
For procurement teams at regulated organizations, the compliance question has more depth than the surface DPA both products offer.
CustomGPT Enterprise has published SOC 2 Type II reports, supports private-cloud or on-premise deployment for sensitive industries, offers dedicated Customer Success Managers, and runs ISO 27001-aligned operations. These are the things a financial-services or healthcare procurement team will ask about, and CustomGPT has documented answers for each.
ChatRaj's compliance posture is appropriate for SMB and mid-market customers today: signed DPA, GDPR-compliant data handling, EU data residency on request, and a roadmap toward SOC 2 Type II during 2026. For most non-regulated buyers this is sufficient. For regulated-industry procurement, the compliance gap is real, and CustomGPT is closer to enterprise-ready today.
This honest compliance gap is one of the few areas where the choice between the two products isn't really up to the operator: if your procurement team requires SOC 2 Type II evidence in their RFP today, ChatRaj's roadmap commitment will not satisfy the requirement, and CustomGPT is the right answer for the next 12 months.
Scenario guide
The honest decision tree.
Your primary use case is a chatbot embedded on your marketing website. Pick ChatRaj. The pricing math, the widget UX, and the iframe install pattern are all optimized for this. CustomGPT will work but at significantly higher per-visitor cost.
Your primary use case is an internal AI assistant for employees over a library of PDFs, Word docs, and spreadsheets. Pick CustomGPT. The file format breadth, agent count, and compliance posture are all optimized for this. ChatRaj's file ingestion works for the common cases (PDF, Word, CSV) but the long-tail formats are not supported.
You have both jobs and the budget to deploy two products. Pick both. The combined monthly cost is lower than the time spent forcing one product to do both jobs poorly.
You're at an enterprise with strict SOC 2 and SLA requirements. Pick CustomGPT Enterprise today, OR negotiate ChatRaj's Enterprise tier (which includes equivalent compliance commitments at a different price point). Run both through your procurement team and compare the final SOWs; both should clear a SOC 2 bar.
You only need 100-300 chatbot conversations per month on your website. Pick ChatRaj. The free tier covers basic evaluation; the Pro tier covers production. CustomGPT is overspecified for this volume.
You need broad file-format support (PowerPoint, .mbox, niche formats). Pick CustomGPT. ChatRaj's file ingestion does not yet cover these formats.
You want a free tier for indefinite evaluation. Pick ChatRaj. The 100-messages-per-month plan is permanent. CustomGPT's free option is a 7-day trial only.
If you've read this far and you're still unsure, the practical move is to spend 30 minutes on each product's free tier or trial. The 30 minutes will resolve the choice faster than reading another 1,000 words of comparison content.