I'm a solopreneur doing AWS cost optimization tools and services, much like a Pieter Levels in the niche of Corey Quinn.<p>For many years I've been building self-hosted serverless headless AWS cost optimization tools:<p>- AutoSpotting.io - for adopting Spot instances in ASGs without configuration changes, no vendor lock-in, and with automated diversification and failover to on-demand - started as OSS alternative to the Spot.io Elastic Group product, still available as OSS at <a href="https://github.com/LeanerCloud/AutoSpotting">https://github.com/LeanerCloud/AutoSpotting</a>.<p>- EBS Optimizer for GP3 converting EBS volumes to GP3, also available as OSS at <a href="https://github.com/LeanerCloud/EBS-Optimizer">https://github.com/LeanerCloud/EBS-Optimizer</a>.<p>(I'm currently working on a few more, for example a NAT Gateway alternative and a tool to automate Savings plans purchases.)<p>Over the last year I started to offer cost optimization as a service, mainly in order to get more ideas for such tools.<p>Over multiple customer engagements I built almost a dozen CLI tools that can be used to optimize many of the AWS services at my customers. Using these tools I was able to deliver some 70% cost optimizations in average at my services customers over the supported resources, and sometimes as high as 60% of their entire AWS bill.<p>I also did a few DevOps engagements, out of which I developed a bunch of Terraform building blocks that can be used to create ECS Fargate or Lambda microservices with persistence on RDS Aurora Serverless v2, with automated CI/CD and other goodies included out of the box.<p>My main FinOps CLI tool named Optimizer was evolved out of EBS Optimizer over multiple customer engagements, and now does automated conversion to GP3 for EC2 and RDS storage volumes, as well as rightsizing and conversion to Graviton for RDS, ElastiCache and OpenSearch, among other things.<p>I recently started to offer Optimizer under the ONCE Source-Available license used by 37signals for Campfire, and I will gradually release all my CLI FinOps tools and Terraform building blocks under a large bundle of tools and building blocks.<p>(The Terraform building blocks scheduled to be released in a couple of days)<p>If you're looking to optimize cloud costs and/or build serverless microservices on AWS, you may want to check this out.