12 Best AI Paraphrasing and Rewriting Tools, Tested by the People Who Published the Numbers

Four operations sold as one

Editing corrects your sentences, paraphrasing replaces them while holding the meaning, rewriting restructures the argument, and generating produces text that did not exist. The four words are used interchangeably across every page ranking for this search, and they describe different outputs with different risks. Sorting them takes one sentence each, and it decides which tool is correct before price enters the conversation.

The reader’s own position appears on this search result, in a Reddit thread ranking third, where the summary of the category is that most of these tools “are either overpriced or just repackage the same stuff”. Both halves are fair, and the second is the useful clue. Several of these products do sit on the same underlying models, so the difference between them is which operation each one is tuned and priced for, not which one has a better engine. Scribbr runs on QuillBot’s engine and says so in its own footer, which is the clearest published example.

The 12 tools at a glance

The table below lists each tool against the operation it really performs, the exact limit of its free tier, and its published starting price, so a row can be dismissed on the limit rather than on the marketing. Every figure is attributed in the entry that follows it, and prices in this category are quoted differently by different publishers, which is itself a finding recorded below.

What the table cannot show is how each tool behaves on your own paragraph, which is the only test that settles it, and every free tier above exists precisely so you can run it.

Where the free tiers actually stop

The free ceilings in this category are set per run rather than per month, and they are the single most useful thing to know before signing up for anything. A 125-word cap is not a small allowance; it is a working constraint that turns a normal document into a queue of separate jobs. The table converts each published ceiling into what it means for a 2,000-word piece of work.

Two ceilings are counted in a unit that is easy to misread. Wordtune’s ten rewrites and TextCortex’s twenty creations are per action, not per word, so a long document exhausts them in a few paragraphs, while QuillBot’s 125-word cap has no daily limit at all and can be worked through indefinitely by anyone willing to paste sixteen times. Those figures come from gptinf’s July 2026 comparison, from humanizethisai’s tool-by-tool breakdown, and from walterwrites’ comparison table, each named again in the entries below.

QuillBot

QuillBot is the category default and the tool most people try first. You paste a passage, choose a mode, and drag a synonym slider that sets how far the vocabulary moves from the original, with freeze words protecting any term that has to stay exact. The reason most people stay is the add-ins: you can rewrite inside Google Docs and Microsoft Word without leaving the document.

The free tier is 125 words at a time with no daily cap and two modes, Standard and Fluency. Premium unlocks nine modes including Formal, Simple, Creative, Expand and Shorten. The published price depends entirely on who published it, and this is the clearest pricing disagreement in the whole search result: gptinf lists $19.95 a month or $49.95 a year, emailvendorselection lists Premium from $6.25 a month, and humanizethisai lists about $4.17 a month on annual billing against roughly $10 monthly. All three were current when written, which tells you the annual discount is doing most of the work.

On performance there is an actual measurement rather than an impression. gptinf ran one shared ChatGPT-written paragraph through six tools and reported QuillBot returning 78 words from an input of 71, doing the most real structural work of any tool tested by moving a subordinate clause to the end of the second sentence. The cost was precision: “without overcharging” came back as “without going over budget”, which shifts the claim from what an agency charges to what the buyer spends, and “real ROI” stretched into “genuine return on investment”.

The flaw worth knowing before relying on it academically is external. Turnitin shipped a paraphrase-detection layer in July 2024 that specifically targets QuillBot-processed text, and humanizethisai’s testing reports it catching that output at rates between 64% and 99%.

Wordtune

Wordtune rewrites one sentence at a time and offers alternatives you accept individually, which is a different working rhythm from every bulk paraphraser on this page. That pace suits polishing prose you wrote yourself, and it suits restating a source badly, because each sentence is judged alone rather than against the argument the paragraph is making.

It holds the strongest measured result of any pure paraphraser in this search result. humanizethisai, testing eight tools against GPTZero, Turnitin and Originality.ai, scored Wordtune highest of all paraphrasers on meaning preservation at 4.6 out of 5, and described the output as genuinely reading better than the input. Its detector bypass rate in the same test was 64%, which the testers correctly present as evidence that it is not built for that job.

Pricing is straightforward by the standards of this category: a free tier of ten rewrites a day, Plus at $9.99 a month and Unlimited at $14.99, as published in humanizethisai’s breakdown. Tone controls cover formal, casual and confident registers, and it integrates with email, Google Docs and Word.

The flaw is the shape of the free ceiling. Ten rewrites a day is counted per sentence rather than per word, so a single page of prose exhausts it before you have judged whether the tool suits you, which makes the free tier a demonstration rather than a trial.

Scribbr

Scribbr is the academic-facing front end for QuillBot’s engine, and its own footer says so. What you get instead of a QuillBot account is the same rewrite with no sign-up, capped at 125 words a run, with Standard and Fluency modes and an Advanced Paraphrase button that is a QuillBot upsell.

Its genuine contribution is framing rather than technology. gptinf singles it out as the safest pick for students because the tool itself carries a reminder that a paraphrased idea still needs a citation, which is the opposite of how most free rewriters present themselves and is the exact point where academic trouble starts. No other tool in this ranking set puts that sentence in front of the user.

On output there is nothing to separate it from its engine. gptinf reports the result being identical to QuillBot’s word for word on the shared test paragraph, inheriting the same “without going over budget” slip, and adding one defect of its own: the second sentence came back with every space removed and needed repairing by hand.

The flaw is the ceiling and where it leads. Lifting the 125-word cap means paying for QuillBot Premium, because that is the engine underneath, so Scribbr is best understood as a free, well-framed doorway to another product rather than as a separate purchase.

Paraphraser.io

Paraphraser.io has the widest free ceiling before sign-up of anything in this comparison at 400 words a run with no daily cap, and it rewrites in more than twenty languages, which nothing else here matches. It offers ten modes, five of them free, with the default free mode being a straightforward Word Changer.

The trade for that generosity shows up in register. gptinf’s test returned 86 words from an input of 71 and recorded the tone dropping consistently through the passage: “critical” became “very important”, “tight budgets” became “limited money”, and “vetted” became “checked out”. The most consequential change was “real ROI” returning as “good value”, which is a different claim rather than a different phrasing, and the Word Changer mode produced nearly the same output as Standard, so the mode selector was not the explanation.

Paid plans start at $23 a month for Silver, quoted by word volume rather than by feature, so it only makes sense once you know your monthly usage. gptinf flags a pricing trap worth repeating: the $4.55 shown inside the editor is a promotional banner charged weekly rather than a monthly plan, and at that rate it costs more per year than every monthly option in the comparison.

The flaws are the ad-supported free editor, which makes long sessions tiring, and the absence of freeze words, which means a product name, a figure or a technical term can be reworded without warning.

Ahrefs Paraphrasing Tool

The Ahrefs paraphrasing tool is a plain input box with a tone selector, no account, no sign-up prompt and no paid version, for the straightforward reason that Ahrefs sells SEO software rather than writing software. There is nothing to upgrade to and nothing being nurtured toward a subscription.

It produced the most accurate rewrite in gptinf’s six-tool comparison. On the Direct tone, ROI, paid media, brand equity and customer acquisition costs all came through the rewrite untouched, and “without overcharging” was read correctly as “without excessive fees”, which is the one phrase most of the field mangled. gptinf also notes that the tone selector genuinely changes the output rather than nudging it, so trying more than one setting is worth the extra ten seconds.

The ceiling is 2,048 characters per run, roughly 300 to 350 words, which places it between QuillBot’s 125-word cap and Paraphraser.io’s 400 words. For a paragraph, an abstract or a product description, that is the whole job.

Two flaws are worth stating. There is no freeze-words feature, so terms you need preserved are preserved by luck rather than by instruction, and the output ran long at 84 words against an input of 71, so expect to trim afterwards. Neither matters much on short text, which is exactly what it is built for.

Semrush Paraphraser

The Semrush paraphraser is the other free rewriting tool published by an SEO platform rather than by a writing company, and it exists for the same commercial reason: it is a way into a much larger product. It offers six modes with a free ceiling of 200 words at a time, three times a day, as recorded in walterwrites’ comparison table.

Its natural user is somebody already inside a keyword and content workflow who needs a headline or a meta description restated without opening another tab. In that setting a 200-word cap is not a constraint, because the text being rewritten is rarely longer than a paragraph.

Three runs a day is the number that decides everything else. It is a sampling allowance rather than a working one, and any document-length job hits it immediately, which is a reasonable design for a tool whose purpose is to demonstrate a platform rather than to finish your writing.

The flaw, stated plainly, is that the free tier is marketing and the paid tier is priced for agencies buying an SEO suite. If the rewriting is the thing you need, the dedicated tools cost a fraction of it; if you are already paying for the platform, the paraphraser is a feature you have already bought.

Grammarly

Grammarly is an editor rather than a paraphraser, and that distinction is the point of this whole page. It corrects grammar, punctuation and clarity while leaving your sentences recognisably yours, which is the correct behaviour for the operation it performs and the wrong behaviour if what you need is different sentences.

The measured results say the same thing twice. humanizethisai scored Grammarly’s Rewrite feature highest of all eight tools tested on meaning preservation at 4.7 out of 5, and lowest but one on detector bypass at 48%, which is exactly the profile of a tool that changes as little as it can get away with. A high meaning score with a low bypass score is not a weakness in an editor; it is the definition of one.

Pricing is published in two forms across this ranking set: emailvendorselection lists a free tier covering basic correctness and clarity plus 100 AI prompts a month, with Premium at $12 a month for 1,000 prompts, while eesel lists the Pro plan at $30 a month, and humanizethisai splits the difference at $30 monthly against $12 on annual billing. The free tier is genuinely usable, which eesel says outright.

The flaw is scope creep in the buyer’s head rather than in the product. Grammarly is not going to restate a source for you, and asking it to is how people conclude that paraphrasing tools do not work. If the text needs to be right rather than different, this is the operation you want.

ProWritingAid

ProWritingAid targets long-form work and reports on the document rather than the sentence: pacing, repetition, readability, sentence variety and dialogue, delivered as analyses you read rather than as a stream of inline suggestions to accept. Plans start at $20 a month, as published by emailvendorselection.

The design suits a manuscript. On a book chapter or a thesis, knowing that one construction appears forty times or that a section reads two grade levels above the rest is worth more than a correction on line nine, and no paraphraser produces that view at all.

The same design is wasted on a paragraph. Running a 200-word passage through a report about pacing produces noise, and the tool is slower to work with than anything else on this page, which is a fair trade only when the document is long enough to have structure worth measuring.

The flaw to plan around is workflow. It is a place you go to review, not something that sits invisibly in the background while you type, so it competes for a slot in your process rather than filling a gap in it. Writers who want both usually run an inline editor while drafting and ProWritingAid once, before the final pass.

TextCortex

TextCortex is a multilingual paraphraser with a browser extension that works across web applications, so the rewriting happens where the text already lives rather than in a separate tab. It sits in the middle of this category on every published measure, which makes it a reasonable default for anyone whose main requirement is language coverage.

humanizethisai’s testing gives it a meaning-preservation score of 4.2 out of 5 and a detector bypass rate of 52%, placing it firmly in paraphraser territory rather than humaniser territory. The testers’ own summary is that it rewrites cleanly but does not address the statistical patterns detectors look for, and they recommend it for multilingual paraphrasing where detection is not the concern.

Pricing starts at $6.99 a month, with a free tier of 20 creations a day. That unit matters more than the price: a creation is an action rather than a word count, so twenty long passages and twenty short ones cost the same, which rewards batching your text into fewer, larger runs.

The flaw is that the free allowance is consumed by experimentation. Trying four tones on the same paragraph spends a fifth of the day’s budget, so the free tier tests the product rather than doing your work, and the paid tier is where any real use begins.

Rytr

Rytr generates text from a prompt and includes a rewrite mode, which makes it a generator that can also restate rather than a paraphraser with extras. That ordering matters for how you check the output: what comes back is new text and needs reading as new text, not as your sentences in different clothes.

It is priced in characters rather than words, which is unusual in this category and easy to misjudge. emailvendorselection publishes a free plan of 10,000 characters a month and paid plans from $9 a month for 100,000 characters, while walterwrites lists it at $7.50 a month. Ten thousand characters is roughly 1,600 words in total for the month, which is one blog post rather than one working week.

The case for it is volume at the low end of the market. For a small team producing short marketing copy at pace, a character budget and a template library are a better fit than a per-seat licence built around brand voice, and it is consistently the cheapest paid entry in every comparison in this ranking set.

The flaw is fidelity. A rewrite mode inside a generator is tuned for producing acceptable text quickly rather than for holding a source’s meaning exactly, so it is the wrong instrument for anything sourced, quoted or technical.

Jasper

Jasper is a generator priced for marketing teams and built around brand voice, campaign templates and multi-seat workflow. Rewriting exists inside it, but as one feature of a larger production system rather than as the product, and the price only makes sense if that system is the reason you are buying.

The published prices disagree by a wide margin across this search result, which is worth knowing before budgeting. emailvendorselection lists $39 a month for a single seat and $99 a month for a three-seat team account; eesel lists the Pro plan at $69 per seat per month. Both describe a seven-day free trial that requires payment details before it starts, and emailvendorselection specifies what the trial includes: over 50 templates, the document editor, commands, the long-form assistant, translation, chat and two outputs.

What justifies the price when it is justified is consistency across a team. A stored brand voice applied to every output by every seat is a real problem being solved, and it is not a problem a paraphraser has ever tried to solve.

The flaw for the reader of this page is fit rather than quality. If you arrived looking for a paraphrasing tool, Jasper is answering a different question at four to seven times the price of the tools that answer yours.

Sudowrite

Sudowrite is built for fiction, and it is the one entry on this page where a rewrite is supposed to change the text. Expanding a scene, shifting emphasis, altering tone and describing something three different ways are the job rather than the risk, which inverts the standard every other tool here is measured against.

Pricing starts at $19 a month for the Hobby and Student plan with a free trial, as published by eesel, which places it alongside the mid-tier paraphrasers rather than alongside the team generators. inkshift, another page in this ranking set, groups it with Novel Crafter and bring-your-own-key setups as the serious options for long-form fiction.

The reason it earns a place in a paraphrasing comparison is contrast. Reading what a fiction tool is praised for makes the requirement for every other operation explicit: a novelist wants the rewrite to introduce something that was not there, and a student, a marketer and a researcher all want the opposite.

The flaw follows directly from the strength. Everything that makes it good at fiction makes it wrong for sourced or technical writing, where invention is not a feature, and its output needs reading with that in mind on anything that has to remain true.

Why half this search result is selling detector evasion

Five of the seven pages ranking for this search sell or lead with a humaniser, a product sold on the percentage of AI-detection checks it defeats rather than on the quality of the writing it produces. That is the finding from pulling the ranking set apart page by page, and it explains why a search for a rewriting tool returns so much text about Turnitin. Understanding the mechanism is worth a paragraph, because it protects you whichever side of the question you are on.

Detectors do not examine word choice. As humanizethisai sets out, they score perplexity, meaning how predictable a sequence of words is, burstiness, meaning the variation in sentence length and complexity, and vocabulary distribution, meaning how transitions and filler words are used. Swapping “utilize” for “use” moves none of those numbers, which is why a paraphraser is a poor evasion tool by design, and why products built for evasion do something structurally different: they reconstruct sentences rather than substituting inside them.

The published measurements follow that split cleanly. In humanizethisai’s test of eight tools against GPTZero, Turnitin and Originality.ai, paraphrasers scored between 35% and 64% on bypass rate, with SpinBot lowest at 35% and a meaning-preservation score of 2.8 out of 5, while dedicated humanisers scored between 80% and over 99%. The tester sells the tool that came first at 99.2%, which is a fact the reader should weigh rather than a reason to dismiss the pattern, since the pattern also matches what the mechanism predicts.

These tools are named on this page and none of them is recommended. A product whose value is measured by whether a third party is successfully misled, usually an educator or an editor, is not something this site recommends, and the practical case is as weak as the principle: Turnitin shipped a dedicated paraphrase-detection layer in July 2024, humanizethisai reports it catching QuillBot output at between 64% and 99%, and an arms race between two vendors is a cost the person submitting the work carries alone. The mechanics of what some of these tools do to the underlying characters is a separate and more interesting question, covered in our explainer on what invisible characters are and what they break.

What a rewrite puts at risk

A paraphraser moves the words that carry the meaning, and four of those movements happen silently. Nothing in any interface on this page flags them, and the measured examples in this article are all real slips recorded by testers rather than hypotheticals, which is what makes them worth checking for on any text that came from a source.

1. A quotation stops being a quotation. Restated words inside quotation marks are no longer what the person said, and the marks now assert something false about them.
2. Claims drift while reading fluently. gptinf’s test caught two in one paragraph: “without overcharging” became “without going over budget”, moving the claim from what a supplier charges to what a buyer spends, and “real ROI” became “good value”, which is a softer and different assertion.
3. Hedges harden. “May increase the risk” becomes “increases the risk”, which is a change in modality, and in a health, legal or financial context it is a change in what you have claimed.
4. Terminology and register drift together. gptinf recorded “critical” becoming “very important” and “vetted” becoming “checked out” in the same rewrite. A dietician becomes a doctor, a lease becomes a contract, a settlement becomes a payment: each close enough to survive a read and wrong enough to matter.

The check that catches all four takes about a minute. Put the original and the rewrite side by side in a text diff checker and read only the differences. Quotations, numbers, hedges and named terms are where the errors are, and they are the four things worth restoring by hand before anything is published or submitted.

Is paraphrasing plagiarism?

Paraphrasing a source is still using the source. Rewriting somebody else’s sentences removes the wording and not the debt, and the thing that settles it is a citation naming who established the point. That is the entire answer: cite what you took, whether or not the original sentences survive the rewrite.

Scribbr is the only tool in this ranking set that puts that reminder on the tool itself, which is worth crediting because it addresses the moment where the mistake is actually made, rather than explaining it in a help article nobody opens. Where the work is academic, the institution’s own policy governs and will say the same thing at greater length, usually with a definition of the point at which a paraphrase becomes close enough to count as copying.

Which one should you pick?

By operation, and each choice below is decided by one attribute rather than by an overall ranking. To correct errors: Grammarly, which scored highest on meaning preservation precisely because it changes least. To review a long document: ProWritingAid, for reports about the whole text rather than suggestions about one line. To restate a source: QuillBot for structural rewriting or Wordtune for sentence-level control, followed by the diff check above in both cases. To work in another language: Paraphraser.io for its twenty-plus languages, or TextCortex if you want a browser extension with it. For one paragraph, free, right now: the Ahrefs tool, which was the most accurate rewrite in gptinf’s comparison and has no paid tier at all. To produce new text: Rytr for volume on a budget, Jasper for a team with a stored brand voice, Sudowrite for fiction.

Anything promising all four operations in one place is telling you it has not decided which one it does, and the free ceilings above are how you find out cheaply which one it actually does well.

How tools get into this list

Inclusion is editorial and free. Every tool here was chosen because it is in real use in this category or because a named publication tested it, and no vendor has paid to be named, been offered a link, or been given a rating in exchange for anything. We take no affiliate revenue from any tool on this page, which is why no entry is a link.

We have not run a paraphrasing benchmark and nothing here claims we did. The measured figures on this page belong to two published tests, both named in the text where they are used: gptinf’s July 2026 comparison, which ran one shared ChatGPT-written paragraph through six tools and reported what survived each rewrite, and humanizethisai’s comparison of eight tools against three detectors. Both publishers sell a product in this category, which is stated here so the numbers can be read with that in mind. If you build a tool in this category and think this page is wrong or out of date, write and say so, and corrections that come with a source get made. How we work with contributors is set out on our write for us page, and anything commercial is arranged separately and disclosed on the page it appears on.

Frequently asked questions

These questions come up alongside the main one and are answered here rather than in sections of their own, each answer self-contained.

Is QuillBot or Grammarly better?

They perform different operations and the measured scores say so. Grammarly scored 4.7 out of 5 on meaning preservation in humanizethisai’s test because it corrects your sentences and leaves them yours, while QuillBot did the most structural rewriting of any tool in gptinf’s test and moved a claim in the process. Asking which is better is asking whether you want your text corrected or restated.

Do paraphrasing tools change my meaning?

Yes, in four specific ways: quotations, claims, hedges and terminology. Two were caught on a single test paragraph by gptinf, where “without overcharging” became “without going over budget” and “real ROI” became “good value”. None of them is flagged in any interface, which is why a one-minute diff check is worth running on anything sourced.

Are free paraphrasing tools good enough?

For tightening prose you wrote yourself, usually yes, and the free ceiling decides the experience more than the quality does: 125 words a run at QuillBot and Scribbr, 400 at Paraphraser.io, 2,048 characters at Ahrefs, ten sentences a day at Wordtune. For sourced or technical writing the risk is identical at every price, because it comes from what a rewrite does rather than from what the tool costs.

Can teachers detect paraphrased AI text?

Often, and the mechanism is published rather than secret. Turnitin shipped a paraphrase-detection layer in July 2024, and humanizethisai’s testing reports it catching QuillBot-processed content at rates between 64% and 99%. Detection scores are probabilistic rather than proof in either direction, which is precisely why a rewrite is a poor strategy and a citation is a good one.

Choose the operation before the tool, meaning correct, restate, restructure or generate, and the 12 tools above sort themselves into four short lists with the free ceilings deciding which one you can actually try today. Whatever you choose, read the diff on anything that came from a source: quotations, claims, hedges and terminology are what a rewrite moves, and they are the four things no interface tells you it changed.