Case Study: SimilarWeb cuts AWS migration costs with Spot (Spotinst)

SimilarWeb Uses Spotinst To Cut Their AWS Migration Costs

SimilarWeb, a leading data‑intelligence platform that analyzes data from 3M mobile apps and 80M websites for over 6M monthly visitors, faced a large, complex migration from on‑prem to AWS and needed to avoid raising IT costs. To address this, they turned to Spot (Spotinst) to run Spot Instances, provide Nomad autoscaling and log‑processing workflows, while using Terraform for provisioning and Reserved Instances where appropriate.

Spot delivered a turn‑key Spot instance management and autoscaling solution integrated with SimilarWeb’s Nomad and Terraform stack, and enabled running large log‑visualization workloads on Spot within a week. As a result, SimilarWeb completed its AWS migration in one year without exceeding budget, significantly cut cloud costs by maximizing Spot usage (and supplementing with 1‑year RIs when needed), and simplified large‑scale workload orchestration.

SimilarWeb

Oz Katz

Head of Production Engineering