Delphi AI Alternative: A Delphi Alternative and Digital Clone AI You Keep Private
Delphi builds a public digital mind that answers your audience, and its paid plans run $79 to $299 a month billed yearly. If the clone is meant for you, to recall what you wrote, answer in your voice and draft from your own material, you do not need the audience features. MentalClone is a private mind clone trained only on the documents you upload, from about $11 a month.
- ✓ Answers in the first person, in the tone of your own writing
- ✓ Uses only your uploaded files and names the document it drew from
- ✓ Says "that is not in my material" instead of inventing an opinion
Delphi, Sensay and ChatGPT prices were read off each vendor's own site in September 2026.
Try it on your own writing
No account neededThat is the end of the free demo. Create a free account to keep this conversation, upload your own documents and keep going.
Public clone or private clone: decide this first
Most people who search for a Delphi alternative have not settled one question: who is supposed to talk to the clone? The answer splits the market in two, and it is worth more than any feature list.
A public digital mind, like Delphi
You are a coach, author or creator with more questions coming in than you can answer. The clone lives on your website, takes voice calls, collects contact details and can sit behind a paid membership. You are buying reach, and the price reflects it.
Delphi is built for this job. So are coaching-focused tools that sell clone access as a subscription product. If this is you, stay in that category.
A private mind clone, like MentalClone
You are a consultant, founder or writer with years of proposals, memos, talks and notes, and you keep rewriting answers you already gave once. The clone is a working tool: ask it what you said about pricing to a similar client, or how you explained your framework in the 2024 workshop.
No embed codes, no contact capture, no revenue share. You pay for a clone that knows your material and does not make things up.
Delphi AI pricing and Delphi alternatives compared
US list prices as published on each vendor's site in September 2026. Delphi shows its paid plans at yearly rates and says yearly billing saves up to 20%, so month-to-month costs more.
| Tool | Price (US, Sept 2026) | Who talks to the clone | What it learns from | Best for |
|---|---|---|---|---|
| Delphi | Free, 1M training words. Builder $79/mo and Scaler $299/mo, both billed yearly. Immortal on custom pricing. | Your audience, by chat and voice call, on Delphi and embedded on your site | Documents, websites, social accounts and videos; 5M training words on Builder, 12M on Scaler | Coaches and creators who want to answer an audience at scale |
| Sensay | $500 per knowledge base per year. Custom plans through sales. | Colleagues, through Slack, Teams or the web | AI-led interviews with an expert, plus files and links | Companies capturing a departing expert's knowledge |
| Custom GPT in ChatGPT Plus | $20/mo for ChatGPT Plus, which includes building custom GPTs. | You, or anyone you share the GPT with | Instructions you write plus a set of knowledge files you attach | Tinkerers who want to write the persona prompt themselves |
| Claude Pro Projects | $20/mo monthly, $17/mo billed yearly. | You, inside a project | Files and instructions added to the project; answers also use general knowledge | Drafting and analysis next to a handful of long documents |
| MentalClone | Starter 79 PLN/mo (about $21), or about $11/mo billed yearly. Professional 199 PLN/mo (about $54). Billing runs in PLN. | Only you | PDF, Word, Excel (XLSX), TXT, CSV, RTF and photos of pages, read on upload | Professionals who want a private clone of their own written work |
Where Delphi genuinely wins: it clones your voice from a short recording and takes phone-style calls, learns from videos and social accounts, embeds on your website, captures leads and lets you charge for access. MentalClone does none of that. It has no voice, no public link and no way to sell access to your clone. If you need your audience to talk to you around the clock, Delphi is the better buy.
Signs you need a private Delphi alternative
If two or more of these sound familiar, you are paying for audience features you will not use.
Your clone has no public link yet
You set it up months ago, tested it yourself and never shared it, because the material includes client work you would not publish. You are the only user of a product priced for an audience.
Your best material is confidential
The proposals, audit notes and strategy memos that make you worth hiring are exactly what cannot face the public. A private clone can learn from them because nobody else will ever ask it a question.
You want recall, not reach
The question you ask most is "what did I say about this last time?" That is a retrieval job over your own files, and it does not need voice cloning or a CRM sync.
Your writing lives in files, not videos
Delphi shines when you have a podcast and a YouTube channel to feed it. If your thinking is in Word documents, PDFs and spreadsheets, a document-first clone reads it directly.
A made-up opinion would hurt you
MentalClone is instructed to answer only from the uploaded material and to say plainly when something is not covered. It will not invent a view you never wrote down.
The Builder plan is hard to justify
At $79 a month on yearly billing, Delphi Builder costs about $948 a year. MentalClone Starter costs 474 PLN a year, roughly $130, for unlimited documents and messages.
How to build a private AI clone of yourself in four steps
Try one page first
Paste a few paragraphs you wrote into the box at the top of this page and ask about them. You get three questions without an account.
Collect what sounds like you
Proposals, articles, talk transcripts, workshop handouts, long emails you saved as documents. If you already fed Delphi, reuse the same source files.
Upload them as they are
PDF, Word, Excel, text and photos of printed pages. Scanned PDFs go through OCR. No folders to organize and no persona prompt to write.
Ask yourself
"How do I usually explain the retainer model?" The clone answers as you, from your files, and names the document it used.
Who uses a private mind clone, and for what
Independent consultants
Seven years of statements of work and final reports. Typical question: "what risks did I flag for the last two manufacturing clients?" The answer drafts the next proposal's risk section in words you already stand behind.
Coaches before they go public
Course modules, session notes and a book manuscript. Typical question: "how did I answer the fear of raising prices in module four?" Test whether your material holds up in a private clone before paying for a public one.
Founders and executives
Board memos, investor updates and all-hands scripts. Typical question: "what did I tell the team about hiring freezes in 2025?" Consistency across years without rereading every update.
Questions people ask before choosing
What is the best Delphi AI alternative?
The best Delphi AI alternative depends on who will talk to the clone. For a private clone of your own writing, MentalClone costs a fraction of Delphi and answers only from your files. For company knowledge capture, Sensay. If you want to write the persona prompt yourself, a custom GPT inside ChatGPT Plus at $20 a month.
How much does Delphi AI cost?
Delphi AI costs $79 a month for Builder and $299 a month for Scaler, both at yearly billing, according to delphi.ai/pricing in September 2026. The Immortal plan for public figures has custom pricing. Delphi says yearly billing saves up to 20%, so paying month to month costs more.
Is Delphi AI free?
Delphi AI has a free plan with voice calling, chat and 1 million training words. Product recommendations, integrations, extra embedding locations and larger training limits need Builder or Scaler. The free plan is a reasonable way to test a public clone before committing to $948 or more a year.
Can I make an AI clone of myself?
Yes. You can make an AI clone of yourself by uploading material you wrote or said, such as documents, transcripts and notes, to a mind clone tool. Delphi also learns from videos and social accounts and clones your voice. MentalClone learns from your documents and answers privately, in the first person, in the tone of your writing.
Is Delphi AI good?
Delphi AI is good at what it is built for: a public, always-available version of an expert that answers an audience by chat or voice and cites its sources. It is less of a fit if you only want the clone for yourself, because most of what the paid plans add serves an audience you would not have.
Does Delphi AI have an app?
Delphi works in the browser, and visitors can talk to a digital mind on delphi.ai or where it is embedded on the creator's own site. MentalClone is also a web app and works in any modern mobile or desktop browser. Neither needs software installed to start.
Is a custom GPT enough to clone myself?
A custom GPT can imitate you if you write detailed instructions and attach your files, and it comes with ChatGPT Plus. The catch is that it will also draw on general knowledge, so it can answer with views you never held. A clone restricted to your uploaded material is safer when the answers carry your name.
What does MentalClone cost compared with Delphi?
MentalClone Starter is 79 PLN a month, about $21, or 474 PLN a year, about $11 a month, with unlimited documents and messages. Professional is 199 PLN, about $54, and reads three times more of your documents per answer. Delphi Builder is $79 a month on yearly billing. Details are on the pricing page.
Clone the way you think, and keep it to yourself
Paste a page you wrote into the box at the top and ask it a question only you could answer. If it sounds like you, the rest of your archive is one upload away.
Keep reading
Mind clone features
Which file types are read, how answers stay tied to your documents, and what each plan changes.
AI second brain app
The same private archive seen as a knowledge tool rather than a clone: what it replaces in a notes workflow.
ChatPDF alternative
If what you really want is to chat with many of your own PDFs at once, this comparison covers the document tools.