Delphi
Delphi turns an expert's own content into a Digital Mind: a verified, always-on conversational clone that answers audience questions by chat or voice, cites its sources, captures leads and reports what people actually want to know.
What is Delphi?
Delphi is a platform for turning one person's expertise into a Digital Mind, a conversational replica that other people can chat with or call. The company describes itself as a platform for human intelligence, and the framing is deliberate: the product is not a general assistant but a clone of a named, verified individual, built from what that person has already made.
Setup follows three steps and is advertised as taking about fifteen minutes. First you sync your knowledge, connecting documents, websites, social accounts, videos, podcasts and newsletters; the system accepts a wide range of sources, YouTube, Notion, books, Substack and Twitter among them. Then you refine the mind, answering a short round of questions that fills the gaps in how it responds and recording a ten-second audio sample so it speaks in your voice. Finally you send your Delphi, sharing it as a public profile, embedding it as a chat widget, or wiring it into Slack, Telegram, Kajabi, Thinkific, Mighty Networks or Substack. On the top tier it also reaches people by SMS and WhatsApp.
Two design choices distinguish it. Every Digital Mind must be created by the actual individual through identity verification, which is presented as the guarantee against impersonation. And answers are grounded in the creator's own source material, with citations showing where each one came from, rather than being generated freely.
Around the conversation sits a light business layer: an analytics dashboard, an audience and conversation view, insight reports that surface recurring questions and emerging trends, contact capture with CRM syncing, product recommendations and custom workflows. The technical account published on the company blog describes a temporally indexed, self-adaptive knowledge graph paired with a retrieval engine and an agent mesh.
A permanent free plan carries chat, voice and one million training words. Paid tiers raise the training volume, contact limits, embedding locations and collaborator seats, and the quote-only Immortal tier adds white-glove setup, monetisation, single sign-on and REST API access. Delphi AI Inc. is based in San Francisco and raised a USD 16 million Series A led by Sequoia Capital in June 2025.
What it does
- Build a conversational Digital Mind trained on your existing content
- Answer your audience by chat or live voice call, around the clock
- Clone your voice from a ten-second recording
- Capture contacts and recommend your products inside the conversation
- Embed your Digital Mind on your website, community or newsletter
- Surface the trends and signals hidden in what people keep asking
- Drive the whole thing programmatically through the REST API on the Immortal tier
When to use Delphi / When not to
A quick filter to help you decide if Delphi is the right fit.
When to use Delphi
- Coaches and consultants who answer the same questions in every discovery call
- Authors and speakers who want their ideas interrogated, not merely read
- Founders and executives whose calendar caps how far their thinking travels
- Creators and public figures with large audiences looking to monetise attention directly
- Course builders adding an interactive tutor to a Kajabi, Thinkific or Mighty Networks programme
When not to use Delphi
- Anyone wanting an anonymous or fictional persona, since every Digital Mind requires a verified real identity
- Teams needing European data residency, because the service is hosted entirely in the United States
- Developers on a modest budget, as the REST API is confined to the quote-only Immortal tier
- Mobile-first users, since there is no iOS or Android application
- Buyers who require a signed DPA, a named subprocessor list or a SOC 2 report before contracting
How to use Delphi
A typical end-to-end flow, from setup to results.
- Open an account from the Get Started button on the site or from the Delphi studio
- Complete identity verification, since every Digital Mind must belong to a real, named person
- Sync your knowledge by connecting documents, websites, social accounts, podcasts and videos
- Let the system index that material into your Digital Mind
- Answer a short round of calibration questions to close the gaps in how it responds
- Record a ten-second audio sample so the Digital Mind speaks in your own voice
- Adjust behaviour through the response settings, access groups and mind score tools
- Publish it as a public profile or embed it on your site with the supplied code snippet
- Connect the channels you need, from Slack and Telegram to Kajabi, Thinkific or Substack
- Watch the analytics and insight views to see what your audience keeps asking, then feed the gaps back in
Pros & Cons
Pros
- A permanent free plan that includes both chat and voice calling, not a countdown trial
- Verified identity behind every Digital Mind, with guardrails against impersonation
- Answers cite the source material they came from
- An explicit commitment that creator content never trains external models
- Named Article 27 representatives for the EU and the UK and an external data protection officer
- Security practices published in detail, from TLS 1.2+ and private subnets to annual penetration tests
- Fast setup, advertised at fifteen minutes, with no technical skill required
Cons
- A steep jump from Builder at USD 79 to Scaler at USD 299, then quote-only pricing above that
- API access, SMS, WhatsApp, single sign-on and monetisation are all locked to the Immortal tier
- The Terms and Privacy links in the site footer both return 404; the working pages live elsewhere
- No contact, demo, features or comparison page anywhere on the site
- No mobile application on either iOS or Android
- Data is hosted only in the United States, with no European residency option
- No published DPA, no named subprocessor list and no SOC 2 or ISO 27001 certification claimed
Pricing & Plans
A permanent free plan is available at USD 0 per month, including chat, voice calling and one million training words. The lowest paid entry point is the Builder plan at USD 79 per month, followed by Scaler at USD 299 per month. The Immortal tier is priced on request. Annual billing is advertised as saving up to 20 per cent.
- Free — your first Digital Mind
- USD 0 per month
- Builder — for professionals and creators
- USD 79 per month
- Scaler — for leaders with growing audiences
- USD 299 per month
- Immortal — for celebrities and public figures
- custom pricing
Data, GDPR & hosting
A consolidated view of how Delphi handles your data.
GDPR overview
Implementation is unusually concrete for a US startup. The privacy policy, last updated 20 July 2025, carries a dedicated EU, UK and Swiss data subject rights section covering access, rectification, erasure, withdrawal of consent, portability, objection and restriction, and points to the EDPB register for lodging a complaint. Article 27 representatives are named for both blocs: DP-Dock GmbH in Hamburg for the EU and DP Data Protection Services UK Ltd in London for the UK, both reachable at delphiai@gdpr-rep.com. An external data protection officer, DP Dock DPO Services GmbH in Kiel, is designated separately. Transfers to the United States are covered, where applicable, by standard data protection clauses. Requests go to support@delphi.ai. Delphi never calls itself GDPR compliant in so many words: it is the machinery, not the claim, that is documented.
Who owns the data?
The creator keeps ownership. Delphi's stated position is that it supplies the platform while the customer retains their content and knowledge, and its documentation adds that the creator's intellectual property remains exclusively theirs. Uploaded material is held in its own private index that is neither shared externally nor used to train outside models. Delphi and its service providers process that content to operate the service, and those providers are contractually restricted in how they may use or disclose it. Payment card data goes to Stripe. Where audio or video is uploaded, limited biometric information such as a voiceprint may be derived under a separate consent form.
Reuse rights
Account holders receive a limited right to use the service and its content for that purpose alone. Reproducing, modifying, translating, publishing, broadcasting, distributing, selling or otherwise commercialising material outside the service is expressly prohibited without prior written permission, and Delphi states that it owns the platform content. For creators the balance reverses: their uploads remain theirs, and on termination they may ask Delphi to keep that content for six months. Visitors who converse with a Digital Mind gain no reuse right over the answers they receive. Delphi itself uses collected data to run and improve the service, including testing, research, internal analytics and product development, and discloses it to categories of service providers, to Stripe for payments and to Google Analytics for measurement.
Data retention & training
Hosting summary
Delphi hosts and operates its services entirely in the United States, and the privacy policy states plainly that user data will sit on US servers; by using the platform, non-US users authorise that transfer. Where applicable, transfers rely on a data processing agreement incorporating standard data protection clauses. No European or other regional residency option is offered. The infrastructure runs on Amazon Web Services, with CloudTrail for audit logging, GuardDuty for vulnerability scanning, Key Management Service for secrets and Shield alongside Cloudflare for denial-of-service protection; the resolved server address geolocates to the United States. Customer data is processed inside a private subnet unreachable from the public internet, encrypted in transit with TLS 1.2 or better and encrypted at rest, with nightly backups. Delphi also reports annual penetration testing, role-based access control and continuous monitoring through Sentry, Axiom and Logfire. No hosting certification such as SOC 2 or ISO 27001 is claimed.
Things to keep in mind
Risks and trade-offs to weigh before adopting Delphi.
- A Digital Mind speaks in your name and your voice: an inaccurate answer becomes your inaccuracy, at scale
- Uploading audio or video lets the platform derive biometric voiceprints, governed by a separate consent form
- Audiences may mistake a fluent clone for the real person's considered judgement, particularly on health, legal or financial questions
- The terms impose binding arbitration and waive class actions; opting out requires a signed letter posted within sixty days
- Delegating your recurring questions can quietly erode the direct contact that made your expertise worth having
- All data leaves your jurisdiction for United States servers, with no European residency alternative
- The commitment not to train external models on creator content sits in documentation rather than in the contract
Setup & Integrations
Technical difficulty
Low for the intended path. Delphi advertises a ready-to-send Digital Mind in about fifteen minutes: connect your existing sources, answer a short round of calibration questions, record ten seconds of audio. No technical skill is required, and the platform integrations are configured from the interface. Two steps ask slightly more: embedding the chat widget means pasting a code snippet into your site, and the REST API, webhooks and hosted actions assume a developer, though these are confined to the Immortal tier and are not part of ordinary use.
Deployment
Integrations
Supported languages
Behind Delphi
Fundraising
Social
Resources
All the official URLs gathered for verification and reference.
Frequently asked questions
Is there a free plan?
How much do the paid plans cost?
Will my content be used to train AI models?
Where is my data hosted?
Is there an API?
What is the minimum age?
Is there a mobile app?
How long does setup take?
Which platforms does it integrate with?
Who do I contact about GDPR?
Should you pick Delphi?
Delphi occupies a narrower niche than its ambition suggests, and is stronger for it. This is not a general chatbot builder but a machine for cloning one named person's expertise, and the two decisions that follow from that framing, mandatory identity verification and answers that cite their source material, are the things competitors find hardest to copy. For a coach, author, clinician or founder who answers the same questions weekly, the proposition is easy to evaluate: a permanent free plan with voice included means the product can be tested properly before any money changes hands.
The reservations are mostly commercial and jurisdictional rather than technical. Pricing climbs sharply, from USD 79 to USD 299 and then to a quote, and the features that turn a Digital Mind into a business, the API, SMS and WhatsApp reach, single sign-on and monetisation, all sit behind that final quote. Hosting is exclusively American with no European option, and although the GDPR apparatus is genuinely well built, with Article 27 representatives named for both the EU and the UK and an external data protection officer, there is no published DPA, no named subprocessor list and no security certification to show a procurement team.
Two smaller things are worth flagging. The Terms and Privacy links in the site footer both return 404, which is careless on a page that exists to be trusted. And the promise that creator content never trains external models, which is the platform's most important commitment, appears in the documentation and a blog post but not in the privacy policy itself. Anyone contracting seriously should ask for it in writing. With a USD 16 million Series A led by Sequoia Capital behind it, Delphi has the runway to close these gaps.
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