Build vs Buy: Why Adding In-App Chat Can Cost Millions and Take Over a Year

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Product teams adding in-app chat face a major decision between building infrastructure from scratch or purchasing a prebuilt chat API solution. Building even a basic chat MVP requires a team of 3–5 engineers working for 3–6 months, while a production-ready system with encryption and scalable infrastructure can take 10–15 months. Beyond development time, enterprise-scale chat built in-house can cost millions when accounting for infrastructure, maintenance, and ongoing engineering hours. Security obligations add further complexity, as real-time WebSocket connections require custom authentication logic, and apps handling health or financial data must comply with regulations like HIPAA and GDPR. Teams often underestimate these hidden costs until a security review or compliance failure forces the issue.

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