In Q3 2024, our 12-person engineering team at a Series B fintech startup ripped our production workload off Heroku, migrated to AWS EKS 1.32, and cut monthly hosting spend from $42,000 to $21,000 – a 50% reduction – while dropping p99 API latency from 2.1s to 480ms and eliminating a 14-month backlog of vendor lock-in workarounds.

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Key Insights

Monthly hosting costs dropped 50% from $42k to $21k after 6-week migration

AWS EKS 1.32 with Karpenter 0.32.1 reduced node provisioning time from 4m to 12s

p99 API latency improved 4.3x from 2100ms to 480ms post-migration

EKS 1.32's GA sidecar support will replace 80% of third-party service mesh sidecar injection by 2025

Why We Left Heroku After 3…