The document discusses the tradeoffs involved in the decision to build a real-time streaming analytics (RTSA) platform in-house versus buying a pre-built solution from a vendor. Building internally provides more customization and control but risks delays and lack of expertise, while buying from a vendor is faster to implement but risks vendor lock-in. The document proposes a third alternative of using a platform like StreamAnalytix that is based on open source technologies but also provides enterprise-level support.