CustomGPT.ai is a citation-focused AI chatbot with very broad file support, sold monthly from $89–$99. Sourceteller shares the cite-everything approach but is pay-as-you-go from $5, and adds a phone line, Telegram and a hosted share page with no code.
CustomGPT.ai facts from its own pages, checked 5 October 2026
| Feature | Sourceteller | CustomGPT.ai |
|---|---|---|
| How you pay | One-off credit packs. No subscription; credits never expire | Monthly subscription capped by queries |
| Lowest paid entry | $5 one-off pack | $99/month ($89 annual), 1,000 queries |
| Free option | 1,000 free credits, no card | 7-day trial, card required |
| Shows sources to customers | Every answer links to the exact passage, including PDFs and scans | Citation on every response |
| AI phone line | Your own number over SIP, 36 spoken languages, from the first pack | Not listed |
| Telegram | Built in | Through an API script you deploy |
| WhatsApp / Messenger | Not yet, on the roadmap | WhatsApp by API script; Messenger and Instagram in beta |
| Shopify | Widget through your theme today; App Store app with order lookups coming | Widget pasted into your theme |
| Languages | 72 written, 36 spoken, plus Banglish | 90+ languages |
| Handoff to a person | Gives customers your own contact route; no live-chat inbox | “Talk to a human” button; no live takeover |
| Your data kept out of AI training | Never used to train models | Never used to train models |
CustomGPT.ai's Standard plan is $99 a month ($89 billed annually) for 1,000 queries, after a 7-day trial that needs a card. Sourceteller has no subscription: 7 credits per answer (about 1 cent), one-off packs, and free credits to try without a card.
Yes. Both are built around citations: CustomGPT.ai links each response to its source, and Sourceteller links every answer to the exact passage it used, highlighted, including PDFs and scans.
CustomGPT.ai starts at $89–$99 a month for 1,000 queries. Sourceteller is pay-as-you-go: packs from $5, 7 credits per answer, credits never expire.
Sourceteller includes a website widget, a phone line on your own number, Telegram and a share link with QR code, all without code. CustomGPT.ai offers website widgets, and WhatsApp, Telegram and Slack through API scripts you deploy.
Checked 5 October 2026. Prices and features change; if something here is out of date, tell us and we’ll correct it. CustomGPT.ai is a trademark of its owner.
That is the whole evaluation. If the answer comes back in your customer’s language with the right passage attached, you already know whether this works for you.
No card · credits never expire · every language from day one