Legato Raises $7M for In-Platform Vibe Coding SaaS App Builder — Enabling Non-Devs to Extend Enterprise Apps Without Engineering

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Legato raised $7M to build an AI SaaS app builder designed for in-platform use — enabling non-developers to build custom applications inside existing enterprise SaaS environments without leaving the platform or requiring engineering resources. This is architecturally distinct from standalone vibe coding tools: rather than replacing SaaS with custom apps, Legato embeds vibe coding capability inside existing platforms as an extension layer. The implication for SaaS incumbents is a potential survival mechanism: platforms that enable user-built extensions retain users who would otherwise vibe-code their way out.