StyleGuard is a paid text-proofing system for spelling, style, word usage, and proper names. StyleGuard Pro watches edits as you type and suggests corrections. You can check writing against references such as The Associated Press, The Canadian Press, and the Financial Times, or use custom dictionaries. StyleGuard Manager supports custom entries and shared dictionaries and style rules for teams. The service works through web, macOS, Windows, browser extensions, and an API. Listed installers cover Safari, Chrome or Chromium, Firefox, Edge, Google Docs, Outlook, PowerPoint, and Word; editor support also includes Adobe InDesign. The API can connect the proofing engine to web CMS or editorial production systems. It is subscription- and cloud-based, so cloud text analysis needs an internet connection. Pricing is paid, with a free trial and plans from $49.99/yr. Lingofy AS identifies itself as the owner and is based in Oslo, Norway.
Who it is for
StyleGuard suits students, freelancers, institutions, corporations, and media organizations that need controlled spelling and style rules. It also fits teams sharing custom terminology across supported editors.
What is good
- Live suggestions while typing
- Custom dictionaries and style guides
- Shared team rules and entries
- Browser, Office, and InDesign support
- API access for publishing systems
What to know first
- No free plan
- Cloud analysis requires internet
- Paid subscription model
- Browser support limited to recent versions
Verdict
StyleGuard combines live proofreading with reference guides, custom terminology, and team rule sharing. Its broad editor coverage and API suit organizations, while the paid cloud model and internet requirement matter for individual users.
StyleGuard plans and pricing
All plansCompared on writing style checkers
- Free plan
- No
- Custom style guide
- Yes
- Terminology management
- Yes
- Brand voice rules
- Yes
- Editor support
- Microsoft Word, Microsoft Outlook, Microsoft PowerPoint, Google Docs, Google Chrome, Mozilla Firefox, Apple Safari, Adobe InDesign
- Rule action
- suggest
- Team workflow
- Yes
- API access
- Yes


