Artificial Intelligence Company

four Theorem

Cloud consultancy that architects, builds, trains and manages serverless applications for businesses

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About four Theorem

Serverless cloud consulting on AWS

four Theorem is a cloud consultancy based in Cork, Ireland, with a fully remote team. It designs, constructs, teaches and runs serverless cloud applications for companies of every size, working mainly on Amazon Web Services. The firm holds the AWS Advanced Tier Consulting Partner status and says it is AWS MAP-compliant, which it presents as evidence of serverless expertise. Its consultants come from a mix of global firms and consultancies, and the firm says it gives honest assessments grounded in each client's business.

Serverless-first design

The firm takes a serverless-first approach. It argues that paying only for the compute a system uses can cut infrastructure costs for workloads that sit idle much of the time, and that serverless designs scale automatically when traffic spikes without costly over-provisioning. It also argues that development teams freed from server maintenance can spend more time on product work.

Migration and modernisation

Services include accelerated serverless delivery, cloud architecture designed around each business, migration acceleration to shift existing systems into the cloud at pace, and platform modernisation that updates older platforms into modern serverless designs. The firm presents its work as making a client's cloud investment deliver both performance and value, with help from AWS funding and support where it is available.

Named projects

The firm's website names clients including Oasis SaaS, Financial Modelling and GreenSpark Analytics. It also describes a project on high-performance serverless compute and another in which it transformed energy trading with AWS. Its website says it aims to help clients build better digital businesses and that feedback from its customers shapes how it works.

Training and teams

Beyond building systems, the firm trains client teams in serverless and cloud technologies, so that they can run what has been built. It describes its engineers as curious, deep learners who enjoy variety and keep up with the technologies that suit each business.

TrustList summary

four Theorem is a cloud consultancy that architects, builds, trains and manages cloud-native serverless applications for businesses of all sizes. It describes itself as a pioneering technology consultancy and works mainly on AWS.

What four Theorem does

Accelerated serverless: building serverless applications on AWS.
Cloud architecture: designing cloud-native systems around the technology that suits each business.
Migration acceleration: moving existing systems to the cloud more quickly.
Platform modernisation: updating older platforms to modern serverless designs.
Training: training client teams in serverless and cloud technologies.

Customers and markets

Businesses of all sizes that want agile digital products and services.

Key facts

Based in: Cork, Ireland
Team: fully remote
Partnerships: AWS Advanced Tier Consulting Partner and AWS MAP-compliant

Summary written by TrustList from the business's own published information, Nov 2026.

Categories & features

four Theorem rankings

four Theorem is ranked on 3 TrustList rankings: #3 on 1, #22 on 1 and #34 on 1.

Every ranking orders its listings by their reviews, how complete the profile is and the Trust Score. four Theorem has no reviews yet and 3 of the 10 profile details we look for. Where no listing on a page has been reviewed, the order follows the profiles alone.

Artificial intelligence company · 3 rankings

#3of 11
Aws
It is the only one of the 11 here listing assessments and one of 4 here listing agile.
Its profile: “The firm holds the AWS Advanced Tier Consulting Partner status and says it is AWS MAP-compliant, which it presents as evidence of serverless expertise.”
Of the 11 here, 14 also cover cloud and 8 also cover information technology.
Behind GreenM.
#22of 103
Cloud
It is one of 7 here listing AWS and one of 16 here listing learning.
Its profile: “four Theorem is a cloud consultancy based in Cork, Ireland, with a fully remote team.”
Of the top 73 here, 26 also cover eCommerce and 21 also cover software development; 3 also work in Ahmedabad and 2 also work in United States.
Behind Hardsun.
#34of 54
Consulting
It is one of 25 here listing cloud.
Its profile: “The firm holds the AWS Advanced Tier Consulting Partner status and says it is AWS MAP-compliant, which it presents as evidence of serverless expertise.”
Of the 54 here, 23 also cover analytics and 22 also cover learning; 4 also work in Delhi NCR and 4 also work in Pune.
Behind Fidel Softech Pvt Ltd, ahead of GalaxE.Solutions.