When a B2B SaaS has achieved product-market fit, its users will start selling for it, usage patterns become clear and repeatable, and community engagement grows organically. This clarity is indicated by steady or increasing API call volumes, deep integration with various features or endpoints, and an active feedback loop where developers invest in the product's evolution. Once PMF is achieved, the company should "go upmarket" to serve larger, more complex organizations with stricter security and compliance requirements, which often involve enterprise-level customers with higher budgets, longer sales cycles, and more advanced feature expectations. To succeed, companies must map out their enterprise feature roadmap, elevate their documentation, stabilize their infrastructure, stay true to their roots, and widen their lens to meet the market's undeniable pull while maintaining a vibrant developer-focused community.