Markup AI is Acrolinx under a new name: a content-checking platform that scores drafts against brand voice, terminology, style guides and citability, with agents you can run from Claude, ChatGPT, Google Docs, Word and an API. BeigeCheck holds what your company has approved: facts with their sources, a company voice, each person’s own voice and your house rules. It gives those to Claude, ChatGPT and Microsoft 365 Copilot before they write, then scores the draft and checks every claim against the facts. Both are priced per company with unlimited people, and both start at $249 a month billed yearly, so the choice isn’t about price.
Side by side
Works inside your own AI tools
- Markup AI
- Claude, ChatGPT and any MCP client on every tier. Microsoft 365 Copilot and Gemini aren’t shown on its public pages.
- BeigeCheck
- Claude and ChatGPT on every plan; Microsoft 365 Copilot from Business up.
Other places it works
- Markup AI
- Google Docs, Word, PowerPoint, Confluence, Figma, Contentful, AEM Guides, several XML and CCMS authoring tools, VS Code, Zapier, n8n, an API.
- BeigeCheck
- A web API for your own systems (proposal pipelines, sales and marketing tools) on Business Integrated and Enterprise.
What it checks
- Markup AI
- Fifteen agents across brand voice, brand terms, personas, style guide, AI voice, fluff, sentence clarity, claims, dates, links, and citability for AI search.
- BeigeCheck
- The Beige-ometer: how authentic a draft reads and how well it fits the voice it’s written in, with the exact sentences to change and a fix for each; Citability on public formats; a claim check against your approved facts.
What it gives the AI tool before it writes
- Markup AI
- Lists of your agents, personas, voice profiles and style guides, on request.
- BeigeCheck
- Your approved voice brief, glossary and house rules for that kind of writing, and your approved facts with their sources.
Company voice
- Markup AI
- Yes: brand voice profiles, personas and terminology, configured once for the organisation.
- BeigeCheck
- Yes: an approved company voice per kind of writing, a glossary and house rules.
Personal voice
- Markup AI
- Not shown on its public pages.
- BeigeCheck
- Yes: each person’s own voice, built only from writing they’ve done themselves, and only they can see it.
Approved facts with sources
- Markup AI
- Not shown on its public pages. A Claims agent flags unsupported claims by their pattern.
- BeigeCheck
- Yes: facts your company has approved, each with its source and version, in six areas. Every claim in a draft is checked against them.
Learning
- Markup AI
- Not shown on its public pages. An admin configures the standards.
- BeigeCheck
- Proposes updates from your documents and from the edits people keep making; an approver decides every one, and nothing changes until they do.
Scoring
- Markup AI
- Each issue carries a risk level (high, medium, low). Numeric scores appear only when they’re switched on for the organisation.
- BeigeCheck
- Scores on every draft, with the sentences behind them, so you can see whether a change moved the number.
Pricing model
- Markup AI
- Flat price per organisation, metered on words checked a year: 12 million on Starter, 50 million on Business, and they’re soft limits.
- BeigeCheck
- Flat price per organisation, metered on units a month (1,000 on Starter, 3,000 on Business, 10,000 on Business Integrated). The rule-based checks are unlimited.
Entry price
- Markup AI
- Starter $249 a month with annual discount, labelled introductory; Business $999; Enterprise quoted. Monthly-billed prices aren’t published.
- BeigeCheck
- Starter $249 a month billed yearly ($293 monthly); Business $535 ($629); Business Integrated $1,062 ($1,249); Enterprise from $2,500. Also in pounds and euros.
Trial
- Markup AI
- 30 days of the full product, and you don’t need a card.
- BeigeCheck
- 7 days on Starter and 14 on Business, from your first check, and you don’t need a card.
Where your data is
- Markup AI
- Not shown on its public pages. Some subprocessors are outside the EEA. ISO 27001 and ISO 27701 certified.
- BeigeCheck
- Database in Ireland, servers in London. The AI model for checks runs with Anthropic in the United States.
Status page
- Markup AI
- Yes, on Atlassian Statuspage.
- BeigeCheck
- Yes, and it’s checked every five minutes.
Where they overlap
The two products agree on the shape of the problem. Both say the check should happen in the AI tool your people already use, so neither asks a writer to paste a draft into another window.
Both run inside Claude and ChatGPT, and both charge the company rather than the seat.
Both look for the habits that make a draft read as machine-written, and each has a name for that check: Markup AI’s is AI Voice, BeigeCheck’s is the Beige-ometer. Both will tell you whether an AI search engine could quote a public page.
Markup AI has a much longer list of places it plugs in. If your writing lives in Google Docs, Word, Confluence or a structured-authoring tool like Oxygen XML or AEM Guides, Markup AI has an app for it and BeigeCheck doesn’t. Its Enterprise tier also carries the Acrolinx style and terminology standards that large documentation teams have run for years.
Where they differ
The difference is what each product knows about your company. Markup AI holds your standards (a voice profile, personas, approved terms, a style guide) and checks whether a draft follows them. BeigeCheck holds your standards and your facts.
Before Claude or ChatGPT writes a word, it gets your approved voice and the specific facts it needs, each with where it came from. After it writes, every claim in the draft is checked against those facts, and a figure your approved record doesn’t support is flagged before anyone sends it.
Voice works differently too. Markup AI’s voice is the organisation’s, configured once. BeigeCheck keeps a company voice and a separate voice for each person, built only from writing that person did themselves. The sales lead and the comms manager describe the company the same way without sounding like the same person.
And BeigeCheck learns. When people keep making the same edit, or answer a question about a gap in the company’s knowledge, BeigeCheck proposes a change, and a person approves it. Every approved change is a version with a name and a date. Markup AI’s public pages describe standards an admin configures; they don’t describe the product changing those standards from what writers do.
Markup AI is further ahead on Microsoft Word and further behind on Microsoft 365 Copilot, which doesn’t appear on its pages. BeigeCheck’s Copilot agent is switched on once by IT for everyone on Business and above.
Who each suits
Markup AI suits a marketing or technical-documentation team that writes at volume in Google Docs, Word, Confluence or a CCMS, already has a style guide and a terminology list, and wants the same deterministic checks Acrolinx ran, now inside Claude and ChatGPT as well. If you’re migrating from Acrolinx, it’s the obvious home.
BeigeCheck suits a company whose people write in Claude, ChatGPT or Copilot and whose question is less “does this follow the style guide” than “is this true, and does it still sound like us and like the person who wrote it”. It’s built for the firm where ten people write in the company’s name and there’s no shared record of which figures they’re allowed to use.
Last checked 3 November 2026, against Markup AI’s own pricing, product and documentation pages. Prices and features change, so check its pages before you decide.