Brivvy is a brand voice infrastructure platform that defines, manages and enforces consistent tone, style and terminology across AI-powered writing tools. It connects to the AI clients teams already use, including Claude, ChatGPT, Cursor, Windsurf and GitHub Copilot, and delivers brand voice rules at the point of generation via the Model Context Protocol (MCP). As teams adopt AI writing assistants, each tool generates content in its own default voice. Style guides sit in static documents. Writers are expected to remember and apply them manually. That breaks down fast. The result is fragmented messaging, different tones across channels, inconsistent terminology and brand dilution that compounds over time. This problem hits solo founders and small startups just as hard. As soon as AI tools enter the workflow for landing pages, support replies, social posts and product copy, inconsistency creeps in. Even a one-person team ends up with mixed signals across channels without a system in place. Brivvy turns brand voice from a reference document into plug-and-play infrastructure. Voice rules are defined once and enforced automatically wherever content is generated. Core capabilities include: - Converts subjective style guidance into structured, machine-readable parameters covering tone, formatting, punctuation, vocabulary and writing conventions. - Connects to AI clients through the Model Context Protocol, delivering brand voice context at the point of generation. - Supports multiple brand voices within a single workspace for different products, audiences or content types. - Provides reusable templates that combine voice rules with format-specific instructions for recurring content types. - Works across major AI writing and coding assistants including Claude, ChatGPT, Cursor, Windsurf and GitHub Copilot. Brivvy is built for solo founders defining a brand voice for the first time, small startups scaling content across a growing team and established organizations managing multiple voices across departments. It fits anywhere AI tools generate customer-facing or internal content, and where consistency matters but manual review does not scale. The platform offers three tiers: Free, Business and Enterprise. MCP server access is available on all plans. Business includes per-seat pricing and advanced voice configuration. Enterprise adds custom integrations and dedicated support.