The Tool Gap
Un système réel décortiqué : le concept qu’il reproduit, l’outil qui fait la différence, ce qu’il coûte.
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Blog · 20 articles
Every line of the bill, explained.
One cloud service per article: what it charges for, and how to cut it. Prices at list, levers you can apply.
Three pieces to read first.
The guides to start with, and the newest special edition.
FinOps · Guide · Nov 9, 2026 · Introductory
FinOps certification: prices, exams and which to take first
The six certifications of the FinOps Foundation side by side: what each costs, what its exam asks, what it requires, how long it lasts, what the bundles save, and an order to take them in.FinOps · Guide · Nov 6, 2026 · IntroductoryHow to learn FinOps: from the framework to your own bill
A path to learn FinOps: what the FinOps Foundation teaches and what its certifications cost, the book that goes with them, then one exercise per precept on your own cloud account, linked to the service articles where the money is.Special edition no. 1 · 16 min · English and FrenchThree futures 2030
Scenarios for agentic project management in the enterprise, by 2030: a modest scenario, a substantial one and an extreme one.One service at a time.
20 articles, newest first.
- FinOps · Guide · Intermediate
Azure vs AWS pricing vs Google Cloud: what really costs less
AWS, Azure and Google Cloud priced on the same building blocks in Paris: a 2 vCPU VM on x86 and Arm, object storage, egress, PostgreSQL, the Kubernetes fee and commitments, then three workloads with three different winners. - FinOps · Guide · Introductory
FinOps certification: prices, exams and which to take first
The six certifications of the FinOps Foundation side by side: what each costs, what its exam asks, what it requires, how long it lasts, what the bundles save, and an order to take them in. - FinOps · Guide · Introductory
FinOps Certified Practitioner: exam, price and study plan
What the FinOps Certified Practitioner exam asks, what it costs with or without the course, the free resources that cover its six modules, a four-week study plan, and what happens once you pass. - FinOps · Guide · Intermediate
FinOps for AI: tokens, cost per feature and the levers
What the FinOps Foundation calls FinOps for AI, the units an AI bill is counted in, cost per feature, a two-feature product priced before and after routing, prompt caching and batch, then showback, anomalies, forecasts and governance. - FinOps · Guide · Intermediate
Savings Plans vs Reserved Instances: which to buy on AWS
Compute and EC2 Instance Savings Plans against Standard and Convertible Reserved Instances, with RDS, ElastiCache, OpenSearch, Redshift and SageMaker AI: coverage, flexibility, Paris rates, the order AWS applies them, a decision tree. - FinOps · Guide · Introductory
How to learn FinOps: from the framework to your own bill
A path to learn FinOps: what the FinOps Foundation teaches and what its certifications cost, the book that goes with them, then one exercise per precept on your own cloud account, linked to the service articles where the money is. - FinOps · Guide · Introductory
What is FinOps? The framework, its phases and where to start
The FinOps Foundation's definition, principles and personas, the Inform, Optimize and Operate loop, four domains, Crawl, Walk and Run, FOCUS, and what the State of FinOps 2026 survey says teams now manage. - AWS · Networking · Intermediate
AWS Elastic Load Balancing: pricing, LCUs and how to cut the bill
What the four load balancer types of Elastic Load Balancing charge for, how a request reaches a target under the hood, and the levers AWS documents to pay less, priced with the list prices of the Paris Region. - AWS · Compute · Advanced
AWS ParallelCluster pricing: what an HPC cluster costs and how to cut it
What an AWS ParallelCluster cluster is made of, how its head node, Slurm queues, shared storage and logs bill, and the levers AWS documents to pay less, priced with the list prices of the Paris Region. - AWS · AI · Intermediate
Amazon Bedrock pricing: how to cut the bill
What runs behind an Amazon Bedrock call, why the model you pick decides most of the bill, and the levers AWS documents for tokens, tiers, caching and capacity to pay less, priced with the list prices of the Paris Region. - AWS · Cost management · Intermediate
AWS Cost Explorer: reading your bill
What AWS Cost Explorer shows and where its data comes from, what its own API and granular data cost, and how to use it with the practices AWS documents to find and cut AWS spend. - AWS · Databases · Intermediate
Amazon DynamoDB pricing and how to cut it
How a DynamoDB table turns item size into billed units, what on-demand and provisioned capacity, indexes and backups cost, and the levers AWS documents to pay less, priced in Paris. - AWS · Compute · Intermediate
AWS Graviton pricing: what you save
What AWS Graviton is, how much less it costs than Intel or AMD on each AWS service in the Paris Region, and the official levers to move to it and cut the bill. - AWS · Networking · Intermediate
Amazon CloudFront: pricing, price classes and how to cut the bill
What a CloudFront distribution bills beyond data out and requests, how price classes, the cache hit ratio and the flat-rate plans change the bill, and the levers AWS documents to pay less, priced from the AWS Price List. - AWS · Containers · Intermediate
Amazon EKS: pricing, extended support and how to cut the bill
What runs under an EKS cluster, what the cluster fee, the nodes, extended support and the network each charge for, and the levers AWS documents to pay less, priced with the list prices of the Paris Region. - AWS · Serverless · Intermediate
AWS Lambda: pricing, memory and how to cut the bill
What runs a Lambda function and when the meter runs, what the bill holds besides requests and GB-seconds, and the levers AWS documents to pay less, priced with the list prices of the Paris Region. - AWS · Networking · Intermediate
AWS NAT Gateway and data transfer: pricing and how to cut the bill
What a NAT gateway and the data transfer around it charge for, how traffic leaves a VPC under the hood, and the levers AWS documents to pay less, priced with the list prices of the Paris Region. - AWS · Compute · Intermediate
AWS EC2: how it works and how to cut its cost
What runs under an EC2 instance, what you pay for while it runs and after it stops, and the levers AWS documents to pay less, priced with the list prices of the Paris Region. - AWS · Databases · Intermediate
Amazon RDS: pricing, Multi-AZ, backups and how to cut the bill
What runs under an RDS database, what each line of its bill charges for (instance, storage, backups, Multi-AZ, old engine versions), and the levers AWS documents to pay less, priced with the list prices of the Paris Region. - AWS · Storage · Intermediate
Amazon S3: storage classes, pricing and how to cut the bill
What S3 stores and how, what each storage class charges for besides the gigabytes, and the levers AWS documents to pay less, priced with the list prices of the Paris Region.
Special editions
Each one takes a subject further than an article does: a long read, numbered, in English and in French.
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One email when an article is out. You also get chapter 1 of the book, free, and the book at €12 instead of €29.
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