Zia: AI Writing Assistant from Zoho vs UndetectedGPT (formerly UndetectableGPT)

Zia is Zoho's writing assistant that proofreads and rewrites text inside Zoho Writer, Mail, Desk, Learn, and Notebook, with a Chrome extension called BluePencil for editing anywhere on the web. It flags grammar, punctuation, spelling, and style issues in English, Spanish, and French while you type.

Most standalone grammar checkers stop at red underlines. Zia combines deep learning grammar checks, NLP preprocessing, machine learning classifiers, and 200+ rule-based style checks for bias, wordiness, vagueness, and informal phrasing. That layered stack shows up when you need more than spellcheck, such as catching subject-verb disagreement, homophone swaps, or unclear pronoun references.

Writers, support agents, students, and teams already on Zoho use Zia for everyday proofing, while Zoho Writer's broader AI features can also generate and reshape content with Zoho's LLM or a connected OpenAI key. Zoho Writer itself is free for individuals and organizations, with optional paid document automation credits when you merge data or collect e-signatures at scale.

UndetectedGPT humanizes AI-written text so it reads naturally and scores lower on detectors like GPTZero, Turnitin, and Originality.ai. You paste draft copy, pick a tone such as Academic, run Ghost Mode humanization, and check the result in the built-in AI Detector before you submit.

Generic paraphrasers swap words without targeting detector behavior. UndetectedGPT adds Ghost-1, a proprietary humanization model, plus Ghost Writer for longer edits in a document-style editor. Paid tiers raise daily credits, stealth boosts, and per-request word limits while the free plan stays capped at two credits and 150 words per run.

Students, marketers, and freelancers use UndetectedGPT when ChatGPT or Claude drafts need a more human rhythm without a full manual rewrite. The old undetectablegpt.com domain no longer resolves, so the product now lives at undetectedgpt.ai.