ASimplify vs Jenni AI vs Grammarly: Which Writing Tool Fits?

Jenni AI, Grammarly and ASimplify all get called "AI writing tools for students", and they are not the same kind of tool. Jenni is a research-writing assistant built around your source library. Grammarly is an editor that follows you into Word and Google Docs. ASimplify is a document editor with the drafting, citing, detecting and humanizing in one file. Which one is worth paying for depends on what part of the assignment is costing you the time.

We make ASimplify, so read this with that in mind. To keep it checkable, every price and feature below comes from each company's own pages, read on 13 November 2026. Where a page would not show us US prices, we say where the figure came from instead.

The short answer

• Writing a thesis or literature review from a pile of PDFs? Jenni AI. Its autocomplete and chat work from your own library, it searches a large academic index, and it imports from Zotero and Mendeley.
• Want your writing polished wherever you already write? Grammarly. It runs inside Word, Google Docs and the browser, and its free Authorship report documents how you wrote a paper.
• Want to draft, cite, check the AI score and fix flagged passages without leaving one document? ASimplify. It is also the only one of the three with a humanizer built for academic text and an agent that works from a Turnitin or DrillBit report.

Plenty of students use two of these together. The most common pairing is a drafting tool plus Grammarly for the final proofread.

Side by side

*Grammarly's plans page shows prices in the visitor's local currency, and it showed us rupees. The US figures are the ones that several 2026 pricing guides agree on. Check grammarly.com/plans for your own country.

Jenni AI: best when the paper lives in your sources

Jenni is built for research writing. You load your PDFs, or import them from Zotero or Mendeley, and its autocomplete suggests the next sentence based on those papers. Its chat answers questions about the library with a citation attached to each answer. It also searches what it calls an index of 200M+ papers, supports more than 10,000 citation styles, and exports to .docx, LaTeX or HTML. Co-authors can edit in real time, with comments and version history.

Where it fits less well:

• The free plan is a trial in practice. Ten autocompletes a day and five chat messages let you try the workflow but not finish a chapter with it.
• There is no AI detector or humanizer on its pricing or home page. If your university checks AI scores, you will need a second tool to see yours before you submit.
• Plus has monthly caps of 5,000 autocompletes and 500 chat messages. Only Pro, at $29 a month, removes them.

If you need LaTeX output, a reference-manager import or a co-author editing alongside you, Jenni lists all three. ASimplify does not list any of them.

Grammarly: best for polishing where you already write

Grammarly's strength is that it goes wherever you write. It works in Word, in Google Docs and in a browser extension, so you never have to move a paper into a new editor. The free plan covers grammar, spelling and 100 AI prompts a month. Pro adds 2,000 prompts, full-sentence rewrites, tone changes, a plagiarism check and the fuller AI detector.

Two things matter more for students than the marketing suggests:

• Authorship is free and genuinely useful. It records whether each sentence was typed, pasted or AI-assisted, and produces a report you choose whether to share. If you are ever asked to show you wrote something, this is better evidence than any detector score.
• Its own detector page says not to treat the result as proof. In its words, you should “never rely on the results of an AI detector alone”. It also claims 99% accuracy on the RAID benchmark. That is Grammarly's own claim, and other vendors claim similar figures on the same benchmark.

Where it fits less well: it is an editor, not a research tool. The free citation generator formats details you type in rather than finding sources for you, and it does not list Harvard. Its humanizer states plainly that it is not meant to change detector results. That is honest, but it means Grammarly won't help if a report has already flagged your work.

ASimplify: best when the whole assignment happens in one file

ASimplify is its own editor. You write in it rather than it following you into Word. The AI Writer, sentence-level citations in APA, MLA, Chicago and Harvard, the AI detector, the humanizer and an uncited-claim finder all work on the document you have open. When you're done, you export a DOCX or PDF with the bibliography included. The free plan gives you limited AI chat and AI detection each day, plus three humanizer runs.

Two things it does that the other two do not list:

• Check and fix in the same place. The detector scores sentence by sentence, and the humanizer rewrites the sentence you select. You can check the passage you just changed without pasting it into another site.
• Work from a report. If you already have a Turnitin or DrillBit report, the Auto AI Remove Agent reads it, rewrites only the passages it flagged inside your .docx, and lists any citation or figure the rewrite touched. It costs a flat ₹100 for up to 3,000 words, shown before you pay. Our guides to Turnitin reports and DrillBit reports explain what those scores mean first.

Where it fits less well: it is newer and much smaller. We say 1,000+ students; Jenni says over 8 million academics. It does not list a reference-manager import, LaTeX export or a plagiarism checker. If your writing has to stay inside Google Docs for a shared group project, Grammarly fits that better.

What a semester actually costs

Four months on each tool's cheapest paid plan, billed monthly, which is how most students pay for a single term:

Over a full year the gap narrows. Grammarly Pro billed yearly is $144 ($12 a month). ASimplify Pro billed yearly is $180 ($15 a month), and Pro Lite paid monthly comes to $120. Jenni advertises up to 60% off on yearly billing but does not print the yearly price on its page.

A note on AI detection, whichever tool you use

If you write your own work and are worried about a false flag, the strongest protection is a record of your process: drafts, version history, notes and the sources you read. Grammarly's Authorship report is built for exactly that. If you were flagged anyway, our false-positive guide covers what to send in the first 48 hours. The detector comparison covers how the main detectors differ.

How to choose in one minute

• Most of your time goes on reading and synthesising sources → Jenni AI, or our RRL generator if what you need is a themed first draft from papers you supply.
• Most of your time goes on fixing sentences you have already written → Grammarly. The free plan is enough for many students.
• Most of your time goes on moving text between ChatGPT, a citation site, a detector and a humanizer → ASimplify, because those tools are all inside one document.
• You already have a flagged Turnitin or DrillBit report → start from the report, not from any of these editors. The guide to what the Turnitin percentage means is the place to begin.