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Grammarly vs Jenni AI: help writing the essay, or help checking it?
Pick Jenni AI if you want help getting words down from your sources: its autocomplete suggests sentences, it searches 200M+ papers, and it formats citations in 10,000+ styles. Pick Grammarly if the draft is yours and you want it checked, with a predicted grade against your rubric and a read on where readers could get confused.
Both have free plans. Both can also leave you holding text that an AI detector flags, for different reasons.
Prices and features checked on October 17, 2026.
At a glance
Writing assistants help you write; essay generators write the essay for you.
| Product | Type | Paid from | Free tier | Citations | Ghostwriting |
|---|---|---|---|---|---|
| Grammarly | Writing assistant | $12/month | Yes | Your sources, or papers it finds for you | Drafts text when asked |
| Jenni AI | Writing assistant | $12/month | Yes | Your sources, or papers it finds for you | Drafts text when asked |
Drafting versus checking
Jenni AI is positioned to help “create essays, papers, and citations”. Its autocomplete writes sentences for you to accept, one after another, and its AI chat reads your library and answers with citations. The whole workspace leans toward producing a draft.
Grammarly's agents mostly start from what you've written: AI Grader grades it, Reader Reactions reads it, Citation Finder hunts for claims that need support. It isn't hands-off, though. Agents in docs “can draft new text directly into the editor”.
Two very different citation tools
Jenni brings sources in from PDF uploads, Zotero or Mendeley, or its own search of 200M+ papers. It links each AI-suggested sentence to its location in the source PDF, formats in 10,000+ styles, and lets you limit autocomplete to your own library. Trustpilot reviewers praise its citation and bibliography tools.
Grammarly's Citation Finder works from the other end. It flags claims in your draft that need support and suggests web-based sources it finds, without naming the databases it searches, then formats them in APA, MLA or Chicago only. The free plan allows five citations a day, while Jenni's free plan has unlimited citations.
Treat both as leads. GPTZero's review (GPTZero sells an AI detector) found Jenni's citations accurate, but in one short sample, and r/PhD commenters asked about tools like it recommended a citation manager such as Zotero instead.
The AI-detection problem, on both sides
Jenni's autocomplete can produce whole passages. A reviewer for GPTZero, which sells a detector, wrote a 250-word introduction mostly by accepting suggestions, and a detector marked every word of it as AI-generated. The same review said the autocomplete text read as AI-written and needed heavy rewriting.
Grammarly's risk is quieter. It warns that using AI Grader's rewrite suggestions could get your work flagged for AI use, and on r/UniUK and elsewhere students describe high detector scores on work they wrote themselves and only edited with Grammarly. Authorship, on the free plan, is the counterweight: it records how you wrote the draft and produces a report you choose whether to share.
Feedback on a draft
Grammarly's feedback tools are the ones described in detail. AI Grader estimates your grade from the assignment details and rubric and gives personalized feedback, though Grammarly cautions that the estimate isn't your actual grade. Reader Reactions shows where readers could get confused. On the free plan, AI Grader gives three pieces of feedback once a day and Reader Reactions five a day.
Jenni AI's plans count Reviews (3 on the free plan, 10 a month on Plus, unlimited on Pro) without describing what a Review checks, so there's no fair way to weigh them against Grammarly's agents.
Free plans and paid prices
Jenni AI's free plan gives 10 autocompletes a day, 10 PDF uploads, 3 AI edits, 5 AI chat messages, 3 Reviews and 3 Workflow runs. Plus is $12 a month and Pro $29, and annual billing is advertised as “Save 60%” without the annual price on show. Several Trustpilot reviewers report renewals charged without notice and refunds refused.
Grammarly's free plan covers docs, Authorship and most agents, with daily limits and 100 AI prompts a month. Pro adds plagiarism and AI-text detection and 2,000 prompts. It's shown at $12 a month, which matches its $144 annual price spread over twelve months, or $30 month to month. So Grammarly Pro and Jenni Plus both display $12, but Jenni doesn't say which billing period its figure assumes.
Grammarly's billing reviews are split: some reviewers describe renewals without warning and refused refunds, while others, including a student charged after a free trial, were refunded quickly.
Which should you choose?
Choose Grammarly if you write your own drafts and want them checked before submission: a predicted grade, reader reactions, citation suggestions in three styles and an Authorship record, free within daily limits.
Choose Jenni AI if you're drafting from papers and want citations tied to the place in the PDF, 10,000+ styles and an autocomplete you can limit to your own library, with a free plan to try first. Ration the autocomplete.
Like Jenni's grounding in your sources but not autocomplete that runs to whole passages? EthiWrite is our take on that. Its Autocomplete stops at about thirty words, and citations come only from your Library. Paper search covers just one index, OpenAlex, rather than a commercial database.
FAQ
- Can I use Grammarly and Jenni AI together?
- Yes, at different stages: Jenni to draft from your sources, Grammarly's AI Grader to check the result against your rubric. Just keep in mind that each has its own route to text a detector flags.
- Which has more citation styles?
- Jenni AI, by a wide margin: 10,000+ styles against Grammarly's APA, MLA and Chicago.
- Is Jenni AI's free plan enough for an essay?
- It's enough for a test drive. The free plan is small: 10 autocompletes a day, 5 AI chat messages and 3 Reviews.
- Does Grammarly find sources in academic databases?
- It suggests web-based sources and doesn't name the databases it searches. Jenni AI searches its own index of 200M+ papers.