editorial · 2026-07-15 · staff editorial
Grammarly for humans: an editorial Twin Score review
Grammarly is a published product in this worldwide directory, not a crowdsourced star chart. Grammarly is the writing assistant in the browser, desktop, and keyboard: grammar, tone, and generative rewrite. It is a human overlay on Gmail, Docs, and Slack. A full agent API is not the product; you do not send your company's emails through Grammarly as JSON. High human, modest agent — another Twin Pages illustration. Twin Score on this directory is 86 for humans and 48 for agents, using the public rubric (interface, onboarding, human docs, collaboration, support, pricing fairness, accessibility, reliability versus API quality, MCP or tool surface, CLI, structured docs, machine auth, quotas, determinism, and skill packaging). Grammarly is sold by Grammarly, founded 2009, headquartered in Editorial verdict for humans: the interface and day-to-day work land at 86 on the Twin Score rubric. We do not convert that number into a fake five-star average or invent a user count. Named author: the byline on this review is a staff editor who used public docs, the public app, and the public pricing page. If you need the machine view, read the twin page on Build Something Agents Want — same slug, different job.
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