Copy.ai vs Grammarly
Both are writing tools. Here is what separates them.
What Copy.ai is
Copy.ai is a content and workflow platform aimed at go-to-market teams. It is assembled from named components: Workflows, Actions, Agents, Tables, Chat, Infobase and Brand Voice, so a piece of copy can come out of a chat prompt or out of a repeatable pipeline that runs the same steps every time. Brand Voice analyses example content and applies the result to later output; the vendor recommends feeding it a minimum of 300 words to work from. Infobase holds reference material that gets pulled into a prompt by tagging an entry with the hash symbol, so product facts and positioning do not have to be retyped into every request. An agent can be trained from as few as three example pieces of content and requires no coding. The platform is model agnostic, routing to models from OpenAI, Anthropic, Gemini and Perplexity rather than committing to one supplier. More than 2,000 integrations are listed, among them Salesforce, HubSpot, Gong, Zapier, Outreach and Salesloft, which puts it next to the sales and marketing systems the content is usually written for. Pricing splits sharply between the entry plan and everything above it. Chat is $29 per month, or $24 per month paid annually at $288 per year, and includes five seats with unlimited words and unlimited chat projects. The higher plans are priced for deployment rather than for individuals: Growth is $1,000 per month with 75 seats and 20,000 workflow credits, Expansion is $2,000 per month with 150 seats and 45,000 credits, and Scale is $3,000 per month with 200 seats and 75,000 credits. Credit consumption varies with the complexity of the task being run, so the credit figure is a budget rather than a fixed count of jobs. Self-serve plans can be moved up or down at any time with a prorated adjustment. Enterprise is quoted rather than published, and adds unlimited users, audit logs, data loss prevention and single sign-on. On data handling, Copy.ai holds AICPA SOC 2 certification, states GDPR compliance and supports single sign-on. It states that it holds zero-retention data agreements with the major LLM providers it routes to, does not train models on customer data, does not share customer prompts and does not sell customer data. Enterprise onboarding is structured around a Day 1 kickoff, testing in Week 1 and production at Day 15.
What Grammarly is
Grammarly is a writing assistant that checks and rewrites text inside whatever you are already typing in. It ships browser extensions for Chrome, Safari, Firefox and Edge, desktop apps for Windows and Mac, integrations for Microsoft Office and Google Docs, and mobile apps for iPhone, iPad and Android. Authorship is the most unusual piece. It colour-codes sentences by their source, separating text that was typed, pasted from a website, taken from a Grammarly suggestion, or pasted from a non-web source, and it can replay how a document was written. It is opt-in, activated by a fingerprint icon, available without paying, and works in Google Docs, Microsoft Word, the Grammarly Editor, Superhuman Go and Canvas. The checking tools reach past grammar. The plagiarism checker compares text against more than 16 billion web pages plus academic papers held in ProQuest databases, drawing on sources including Wikipedia, Frontiers, PLOS One, ScienceDirect, SAGE Journals, PubMed, Elsevier, DOAJ, arXiv and Springer. It returns an originality score, highlights passages that need a citation and surfaces the matched source. A separate AI detector flags text produced by ChatGPT, Gemini, Claude and Microsoft Copilot. Grammarly puts its detection accuracy at 99 percent, while stating that no AI detector is 100 percent accurate and that human-written text can be flagged as a false positive. Named agents cover AI Grader, Citation Finder, Reader Reactions and Resume Builder. Plans separate mainly by AI prompt allowance. The Free plan carries no charge and includes 100 AI prompts a month. Plus adds full-sentence rewriting, tone adjustment, and detection of plagiarism and AI-generated text, and raises the allowance to 2,000 prompts per member per month, with one style guide, one brand tone and two user groups. Enterprise is quoted by the sales team, makes prompts unlimited per member, and removes the caps on style guides, brand tones and user groups. For organisations, the business feature set adds a style guide, brand tones, Knowledge Share, analytics, admin controls, SAML single sign-on, SCIM provisioning and centralised billing, with Enterprise layering on bring-your-own-key encryption, data loss prevention and an audit logs API. Training on customer data is switched off by default for business customers. The education product integrates with the Canvas, Blackboard and Moodle learning management systems, supports English, Spanish, French, German, Portuguese and Italian, and offers inline translation across 19 languages.
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