Custom AI vs. SaaS AI
Custom AI and SaaS AI represent two ends of a build-versus-buy spectrum. SaaS AI is a vendor's model behind a vendor's interface—ChatGPT Enterprise, Jasper, Writer—where you get speed to deployment but inherit someone else's architecture, limitations, and roadmap. Custom AI is a system built for your specific data, workflows, and success criteria, typically combining foundation models with proprietary retrieval layers, custom evaluation pipelines, and interfaces designed for your users. The tradeoff is real: SaaS AI ships in days, custom AI ships in weeks or months. But SaaS AI gives every competitor the same capability, while custom AI can become a durable advantage. The right answer depends on whether the AI capability you need is a commodity or a differentiator. Email summarization is a commodity—buy it. A system that underwrites insurance risk using your proprietary claims data is a differentiator—build it.
Related terms:
Prompt Injection
Prompt injection is an attack where a user or data source inserts instructions that override a language model’s intended behavior.
Prompt Engineering
Prompt engineering involves designing and refining inputs—ranging from simple instructions to detailed system prompts with examples, constraints, personas,...
Embeddings
Embeddings are numerical representations of text—vectors of hundreds or thousands of floating-point numbers—that capture semantic meaning in a form machines...