From the editors at Proofed

Your brand voice,
perfectly consistent.
Everywhere.

Stylus transforms scattered brand guidelines into a living system your entire organization actually uses—keeping humans and AI aligned with your voice.

Stylus Style Guide Editor

Sections

  • Voice & Tone
  • Grammar Rules
  • Terminology
  • Formatting
  • Legal Copy

Voice & Tone

12 Rules Active

Use active voice

Write in active voice to create clear, direct communication that engages readers.

Priority 1

Be conversational, not corporate

Write like a knowledgeable friend, not a faceless corporation.

Priority 1

Trusted by content teams at leading companies

TechCorp
MediaHouse
FinanceFirst
HealthPlus
RetailGiant

Brand guidelines that actually get used

Your brand voice is your identity. But PDF style guides collect dust, wikis go stale, and AI tools make up their own rules. Every inconsistent message erodes customer trust.

Static PDFs go out of date

Guidelines evolve. Documents don't update themselves.

AI doesn't know your brand

Generic AI writes generic copy. Your voice gets lost.

Scale breaks consistency

More writers, more channels, more drift from your brand.

Stylus is different

Built by editorial experts

Created by Proofed, trusted by thousands of writers worldwide.

Living documentation

Update once, propagate everywhere. Your guides evolve with your brand.

Keeps AI on-brand

Feed your rules to any AI tool via our API. Consistent output, every time.

Everything you need for brand consistency

A complete platform for creating, managing, and distributing your brand's writing standards.

Hierarchical Organization

Structure your guidelines with sections, subsections, and individual rules. Priority-ranked so writers know what matters most.

Style Guide Inheritance

Create master brand guidelines that cascade to sub-brands. Perfect for enterprises with multiple products or regional variations.

Brand Glossary

Define your terminology with explanations, examples, and abbreviations. Categorize terms for easy reference and ensure consistent language.

Preferred Spellings

WiFi or Wi-Fi? E-mail or email? Define the right way once. Case sensitivity and context notes ensure perfect usage.

API-First Architecture

Feed your style rules directly into AI writing tools, CMS platforms, and editorial workflows via our comprehensive JSON API.

Team Collaboration

Multi-tenant workspaces with role-based access. Everyone sees what they need; admins control the source of truth.

Complete Audit Trail

Every change tracked. Who modified what, when. Perfect for compliance requirements and understanding how your guidelines evolve.

Multi-Audience Views

Control what's visible to API consumers, public viewers, and internal editors. Different audiences, tailored access.

Expert Support

Backed by Proofed's editorial expertise. Get help building guidelines that reflect best practices in writing and style.

From scattered guidelines to unified voice

Get up and running quickly with expert guidance.

1

Share Your Brand

Tell us about your voice, tone, and preferences. Share existing documentation or start from scratch.

2

Build Your Guide

Organize rules into sections with priorities, examples, and exceptions. Add glossary terms and preferred spellings.

3

Collaborate & Refine

Work with your team to review and expand. Get suggestions from stakeholders via public links.

4

Integrate Everywhere

Connect via API to AI tools, CMS platforms, and workflows. Your voice, consistently applied.

AI-Ready

Keep AI writing on-brand

Your team is using AI to write content. Without your style rules, AI produces generic copy that sounds like everyone else. Stylus keeps AI aligned with your voice.

Inject your style rules into any LLM prompt
Works with ChatGPT, Claude, Gemini, and custom models
Structured JSON output for seamless integration
Update a rule once—AI follows it immediately
API Response
{
  "style_guide": {
    "name": "Acme Brand Voice",
    "sections": [
      {
        "name": "Voice & Tone",
        "rules": [
          {
            "name": "Use active voice",
            "priority": 1,
            "description": "Write in active voice...",
            "example": "We built this → Good"
          }
        ]
      }
    ],
    "glossary": [
      {
        "term": "customer",
        "preferred": "member",
        "context": "Always use 'member'..."
      }
    ],
    "preferred_spellings": [
      {
        "word": "ecommerce",
        "preferred": "e-commerce",
        "case_sensitive": false
      }
    ]
  }
}

Built for teams that take brand seriously

From fast-growing startups to global enterprises.

Content Teams

Stop answering the same style questions. Your writers get instant access to guidelines, searchable and always current. New team members onboard in days, not weeks.

  • Reduce editing time by 40%
  • Consistent voice across all channels
  • Scale content production confidently

Marketing Agencies

Manage multiple client brands without confusion. Each client gets their own workspace with their own rules. Handoff to clients is seamless with public sharing.

  • Separate workspaces per client
  • Public links for client collaboration
  • Suggestion system for feedback

Enterprise Brands

Govern brand voice across divisions, regions, and product lines. Master guidelines cascade to sub-brands while allowing regional customization.

  • Style guide inheritance for brand hierarchy
  • Full audit trail for compliance
  • Role-based access control

Teams Using AI

Using AI to generate content? Stylus ensures it sounds like you. Feed your rules into any AI tool and get brand-consistent output every time.

  • API for AI tool integration
  • Works with any LLM or content platform
  • Structured output for seamless parsing
Built by Proofed

Backed by editorial expertise

Stylus is built by Proofed, trusted by thousands of writers and businesses worldwide for professional editing and proofreading. We understand what makes writing work—and we've built that expertise into every feature.

750k+

Documents edited

500+

Expert editors

50+

Subject areas

Ready to unify your brand voice?

Join the brands that trust Stylus to keep their voice consistent across every channel, every writer, every tool.

Request a Demo

Or email us directly at sales@proofed.com