About Synderesis

AI in service of the human person.

Synderesis exists for a simple conviction: the most powerful technology of our age should help people and organisations work without asking them to set their values or duty of care at the door. We are an EU company building a Catholic AI workspace for individuals and professionals, plus organisational tools for businesses and institutions — independent, and not an official organ of the Church.

The moment

Why now.

AI is moving into daily life and every organisation—drafting emails, answering questions, supporting customers and shaping decisions. The question is no longer whether to adopt it, but whose values it carries while it does.

This has been named clearly in the Church’s recent teaching on artificial intelligence, from the Vatican note Antiqua et Nova (2025) onward: technology is never value-free. It carries the commitments of those who design, finance and use it, and institutions and society share a duty to keep tools in service of the human person. That is not a niche complaint. Mainstream research and journalism are now saying the same thing about the large public models themselves.

The public evidence points the same way from more than one angle. A Stanford working paper gathered 180,126 user assessments of 24 models across 30 political topics and found that nearly all were perceived by users as significantly left-leaning. The study measures perceived slant. Establishing objective factual bias would require separate evidence. For institutions, the finding matters: on contested questions, people do not experience these systems as speaking from nowhere.

Minority perspectives recede more quietly. A 2026 benchmark of 27 models (preprint) found non-mainstream perspectives underrepresented relative to human expectations, most noticeably on practical personal questions. The proposed mechanism is inherited patterns: training data and dominant imagery narrow what a model treats as the ordinary case, and a peer-reviewed AIES study of alignment-by-human-feedback shows the correction step inherits the situated values of the narrow group giving that feedback.

So for a diocese, a charity, a school or a Catholic business, the practical question is which provider makes its values, its sources and its safeguards visible—and whether those choices fit your mission.

"Ours is the pressing duty to remain profoundly human."
Pope Leo XIV · Magnifica Humanitas (15 May 2026)

Synderesis exists to answer that question deliberately: organisational AI built by an EU company with a Catholic horizon, drawing on official primary sources in our Catholic answer path, with human review made explicit—so that institutions never have to take a provider’s defaults on trust.

"Excellence and conscience were never meant to be a choice. We build the AI that refuses to make you pick."
What makes us different

Not a chatbot. Not a wrapper. Our own model.

Independent & proprietary

We build and train our own model. We're not a thin layer over Big Tech, and not a search box over a library, we control how it behaves.

Privacy and deployment choices

Clear privacy controls, with private-cloud and on-premise options to discuss when organisations require tighter control.

Principled by design

Aligned with Catholic principles at the core—including a standing commitment to keep AI human-centred—so Catholic principles guide model design and evaluation.

Our fidelity

Measured against the Church’s teaching.

We do not ask anyone to take our marketing word for “aligned.” The standard we aim at is the Church’s published teaching on the human person, conscience and the dignity of life—and we build, test and correct the product with that horizon in view, with ethical and governance counsel where we can obtain it. The Church’s guidance on AI—from Antiqua et Nova to Magnifica Humanitas—is part of that horizon: AI is to support human dignity and preserve human moral responsibility, and tools must not smuggle in a vision of the person that our users do not share.

This is also why we do not treat “use a mainstream model and add a Catholic prompt” as sufficient. An instruction added at the end does not change the data a model was trained on or the defaults it was tuned toward—the same defaults reflected in the research above on perceived political slant and underrepresented religious perspectives. We would rather state our horizon plainly, name the official Church sources we draw on, and show where human review sits.

We are a company that wants to serve people and Catholic organisations while respecting their own voice and authority. The name says what we hope technology can carry: synderesis, the innate spark of conscience, the knowledge of right and wrong that comes before clever reasoning.

The people

Founded by a philosopher and a builder.

HH

Hasse Hällström, PhD

Co-founder · Science & fidelity

An AI scientist with a doctorate in philosophy, working at the meeting point of moral philosophy and applied AI, including in regulated, high-trust environments. They lead the model, the alignment, and our fidelity to the Church’s teaching.

OA

Oscar Andersson

Co-founder · Commercial & growth

Leads everything around bringing Synderesis to the people and organisations it's built for, partnerships, product positioning, and the company's presence in the world. He owns how we reach and serve our customers.

Contributors

Fr. Oskari Juurikkala, PhD

Assistant Professor of Fundamental Theology · Pontifical University of the Holy Cross, Rome

A Finnish Catholic priest and a member of Opus Dei, he is also Adjunct Professor of Law and Economics at the University of Helsinki. He holds a PhD in theology from the Pontifical University of the Holy Cross (2019), with a background in law and economics.

He contributed to building Labora, among other contributions to Synderesis.

Partner with us

Backing AI the Church can trust.

This is early, deliberate work with a long horizon. If you want to help shape Catholic AI for mission-driven institutions, we'd like to hear from you.

Mission-aligned investors, partners who see both the opportunity and the purpose.
Founding organisations, businesses and institutions ready to build alongside us.
Theological & ethical advisors, those who can help keep us faithful.
Questions

Common questions.

What does the name Synderesis mean?
The name refers to the innate spark of conscience: our basic knowledge of right and wrong. It reflects our aim to build technology that serves the human person and supports responsible judgement.
Is Synderesis an official Church service?
No. Synderesis Catholic AI is an independent company and is not affiliated with, endorsed by, or an official organ of the Catholic Church or the Holy See.
Where is data hosted, and is it private?
The public service uses disclosed cloud and model processors (see the Privacy Notice). Organisations with stricter requirements can talk to us about private-cloud and on-premise options. We do not sell your account data as a product.
What does “Catholic-aligned” mean?
It means we design and evaluate the product with the Church’s teaching on the person, conscience and dignity of life as explicit design and evaluation criteria. It is a practical work assistant guided by Catholic principles throughout. We do not claim moral authority.
How is this different from other assistants or ChatGPT?
Consumer Catholic chat apps are mainly for personal Q&A. General assistants are powerful, but the evidence cited above points to user-perceived political slant, underrepresented minority perspectives, and narrowed portrayals of specific institutions. Synderesis serves both audiences: a Catholic AI workspace for individuals and professionals, and organisational products with account-scoped access, API keys, Customer Agent and private deployment options. Catholic principles, clear privacy boundaries and human responsibility remain part of the design horizon across both. See also our Catholic AI FAQ.
Do I have to be Catholic?
No. Individuals and professionals can create a free account directly. We also build organisational products for Catholic businesses and institutions. Any mission-driven organisation that wants dignity-centred, accountable AI built by an EU company may find a fit.
How do we get started?
Create an account to explore the service, read the Resources guides, or email hello@synderesis.eu for a private Platform conversation. Start small: classify your data, pick a low-risk pilot, write rules people can remember.
Work with us

Let's build something faithful.

Whether you want to use Synderesis yourself, bring it into your professional work, deploy it across an organisation or help shape it, start here.