Copy.ai is a go-to-market platform. Its chat offers OpenAI, Anthropic and Gemini models, and around it sit workflows and agents for sales and marketing teams, a Brand Voice built from your published writing, and an Infobase of company context that the chat draws on. Fullcast has acquired it and plans to fold it into a revenue-operations platform.
BeigeCheck is a read-only connector that gives the Claude, ChatGPT or Microsoft 365 Copilot your people already pay for the company’s approved facts and voice, then scores each draft and checks every claim against those facts. Copy.ai wants to be the app; BeigeCheck assumes you’ve already chosen one.
Side by side
Works inside your own AI tools
- Copy.ai
- No. It offers OpenAI, Anthropic and Gemini models inside its own chat. An MCP server or connector into Claude, ChatGPT, Copilot or Gemini isn’t shown on its pages; its parent, Fullcast, has one for the Fullcast platform.
- BeigeCheck
- Claude and ChatGPT on every plan; Microsoft 365 Copilot from Business up.
Other places it works
- Copy.ai
- Its own Chat, Workflows and Agents; a Workflows API; integrations with Salesforce, HubSpot, Slack, Teams and others. A browser extension or Docs and Word add-ins aren’t shown on its pages.
- BeigeCheck
- A web API for your own systems on Business Integrated and Enterprise.
What it supplies to the AI tool
- Copy.ai
- A Brand Voice and Infobase entries, as context for generation inside Copy.ai.
- BeigeCheck
- Your approved voice brief, glossary and house rules for that kind of writing, and your approved facts with their sources. Your AI tool does the writing.
What it checks
- Copy.ai
- A check of a finished draft against the voice or the Infobase isn’t shown on its pages; both guide generation. A Copyscape plagiarism action exists in workflows. No score or gauge is shown.
- BeigeCheck
- The Beige-ometer on every draft: how authentic it reads and how well it fits the voice, with the sentences to change and a fix for each; Citability on public formats; a claim check against your approved facts.
Company voice
- Copy.ai
- Yes: Brand Voices built from a 50 to 500 word sample or a URL, unlimited per teamspace, one set as the default.
- BeigeCheck
- Yes: an approved company voice per kind of writing, a glossary and house rules.
Personal voice
- Copy.ai
- Not shown as its own feature. Copy.ai suggests separate Brand Voices for individual executives.
- BeigeCheck
- Yes: each person’s own voice, built only from writing they’ve done themselves.
Approved facts with sources
- Copy.ai
- Infobase holds brand guidelines, value propositions and documents, called into a chat with a tag. Sources against each entry, approval, and a check of a draft’s claims aren’t shown on its pages.
- BeigeCheck
- Yes: approved facts, each with its source and version, in six areas; every claim in a draft checked against them.
Learning
- Copy.ai
- Not shown on its public pages. A Brand Voice analysis is edited by hand or re-run on the same samples.
- BeigeCheck
- Proposes changes from your documents and from the edits people keep making; an approver decides every one.
Pricing model
- Copy.ai
- Per plan with a seat allowance and monthly workflow credits.
- BeigeCheck
- Flat price per company with unlimited people, metered on units a month. The rule-based checks are unlimited.
Entry price
- Copy.ai
- Chat $29 a month or $24 billed yearly, five seats. Growth $1,000 a month (75 seats, 20,000 credits); Expansion $2,000; Scale $3,000; Enterprise quoted. Which plans include Brand Voice and Infobase isn’t stated on the page.
- BeigeCheck
- Starter $249 a month billed yearly ($293 monthly); Business $535; Business Integrated $1,062; Enterprise from $2,500. Also in pounds and euros.
Trial
- Copy.ai
- “Try for free” on the page; the length isn’t shown.
- BeigeCheck
- 7 days on Starter and 14 on Business, from your first check, and you don’t need a card.
Where your data is
- Copy.ai
- Region not shown on its pages. SOC 2 Type II.
- BeigeCheck
- Database in Ireland, servers in London. The AI model for checks runs with Anthropic in the United States.
Status page
- Copy.ai
- Yes, status.copy.ai.
- BeigeCheck
- Yes, and it’s checked every five minutes.
Where they overlap
Both start from the same two ingredients: a company voice and a store of company facts, so that what the model writes sounds like you and draws on what you know. Copy.ai’s Brand Voice and Infobase and BeigeCheck’s voice brief and approved facts are answers to the same question.
Copy.ai does much more besides. It’s a workflow and agent platform for sales and marketing, with a chat that lets you switch between OpenAI, Anthropic and Gemini models in one window, integrations into Salesforce and HubSpot, and workflow credits for bulk jobs. For a revenue team automating outreach, that’s the product, and BeigeCheck isn’t a substitute for it.
Where they differ
The first difference is where your people write. Copy.ai gives you Claude and GPT inside Copy.ai. BeigeCheck gives Copy.ai’s kind of context to the Claude, ChatGPT and Copilot your people already use, with nothing to switch to. If a colleague is happy in their own Claude, BeigeCheck leaves them there.
The second is checking. Copy.ai’s pages describe the voice and the Infobase as context for generation. Nothing described reads the finished draft back against them, and there’s no score. The Beige-ometer scores every draft for how authentic it reads and how well it fits the voice, quotes the sentences to change, and checks every claim against your approved facts.
The third is provenance and approval. An Infobase entry is something someone pasted. A BeigeCheck fact has a source and a version, nothing changes without an approver, and BeigeCheck proposes changes itself from the edits people keep making.
And the fourth is price shape. Copy.ai sells seat allowances that climb from five to 200, with credits on top. BeigeCheck charges the company a flat price with unlimited people on every plan.
One more thing to weigh: Copy.ai’s own acquisition page says its capabilities will ship as part of Fullcast’s platform, and its feature pages still refer to a Pro plan that the live pricing page no longer lists. Check where the product is heading before you commit a team to it.
Who each suits
Copy.ai suits a sales or marketing operations team that wants one platform for AI workflows and agents across its go-to-market stack, with a choice of models in one chat and a brand voice applied inside it.
BeigeCheck suits a company whose people write in Claude, ChatGPT or Copilot and want to keep doing that, where the question is whether each draft is true, sounds like the company and still sounds like the person, and where ten writers shouldn’t need a seat allowance to share the same approved facts.
Last checked 3 November 2026, against Copy.ai’s own pricing, feature, knowledge-base and security pages. Prices and features change, so check its pages before you decide.