Cost to Build a Data Streaming Platform: TCO, Risks, and Alternatives

This post details the cost drivers and hidden ongoing costs of self-managing a Data Streaming Platform (DSP) built on Apache Kafka. It contrasts these costs with the benefits of a managed service, emphasizing infrastructure, core technology operation, custom development, skilled human capital, and observability stack expenses. It highlights risks and costs associated with maintenance/upgrades, downtime, scaling overhead (partition/broker management), and compliance/security audits. The post provides a TCO comparison table and offers advice for mitigating costs if building in-house, such as investing in IaC, standardizing on open source, optimizing team structure, implementing data governance, and enabling developer self-service. It also cites a real-world example of cost savings from a managed DSP migration.