Diglot vs QuillBot
Paraphrase a source, keep its citation, and fix the paragraph around it — in your essay, not in a separate tab.
- You're writing longer pieces (essays, papers, business documents) — not isolated paraphrases
- You think in another language first and draft bilingually
- You want translation tied to revision rather than as a separate utility
- You want Authorship Certificate proof (not AI humanizer evasion) when detectors falsely flag your work
No credit card required · Your text opens in the editor after sign-up
Example from the comparison below. Your own text gets its own suggestions.
The paraphraser sits inside your essay
QuillBot reads like a suite of small utilities. Diglot is a single editor where translation, rewriting, and grammar checking happen in one writing session.
- Highlight a sentence, pick a register, accept the rewrite where it stands.
- The source’s citation stays attached to the new sentence.
- Grammar keeps checking the paragraphs around it, so nothing is copied between tabs.
Cowriter
Rewrite a whole section and approve every edit
Ask Cowriter to make a section clearer, more formal or tighter. Removed words show in red, new ones in green, and nothing changes until you accept.
- 30+ skills, from /formalize to /refute
- Accept all, or review one edit at a time
- Explains what it changed and why
Grammar
Check the paragraphs around it without copying text
Grammar runs on the whole document. Each issue comes with the fix and a one-line reason, including the habit from your first language.
- Every issue listed beside the text
- Fix one by one, or fix all
- Nothing leaves your draft
One window instead of five tabs and five bills
Before: five tabs
- Jenni AIAutocomplete and citations, but no help with a second language.~$20Unlimited, monthly
- DeepL ProTranslates outside your document, so citations and tone are lost.~$8.74from, monthly
- QuillBot PremiumRewrites one paragraph at a time in a separate tab.$19.95monthly
- Grammarly ProFixes the sentence without naming the first-language habit behind it.~$12per month, billed yearly
- ChatGPT PlusRewrites in its own voice and can invent references.$20monthly
If you pay for all five~$81/ month
After: one Diglot document
- Drafting, autocomplete and citations
- Translation inside the document
- Rewrites in five tones
- Grammar that names your first-language habits
- Cowriter with 30+ skills, every edit waiting for you
- Your PDFs, your glossary and a free Authorship Certificate
Publicly listed prices: Jenni AI verified 2026-07-18; DeepL, QuillBot and Grammarly verified 2026-04-13; ChatGPT Plus as listed by OpenAI. Prices change, so check each vendor before you buy.
Try a skill on a real paragraph
Your draft
Many researches shows that students which use social media more than three hours per day have lower grades. In our opinion this is because the constant notifications make difficult to concentrate, so the information is not stay in the memory.
We propose to migrate our reporting to the new platform in Q1. This will reduce costs a lot and the team will be more productive, because the old system is very slow and nobody likes it.
We are very sorry for the delay, it was not our fault but the supplier one. We will try to send you the goods until Friday, please be patient with us and don’t cancel the order.
Cowriter /formalize · Fluent AI
Many studies show that students who use social media for more than three hours per day have lower grades. We believe this is because constant notifications make it difficult to concentrate, so information does not stay in memory.
Example output written for this page to show the difference between AI tiers; real results depend on your text. Fluent AI is on Free, Native AI on Pro.
Every citation leads back to a real page and a real DOI
Your paragraph
The Transformer replaced recurrence with attention alone , and pre-trained encoders such as BERT carried the idea to language understanding . Attention mechanisms first improved neural machine translation .
References
- Vaswani, A., Shazeer, N., Parmar, N., Uszkoreit, J., Jones, L., Gomez, A. N., Kaiser, Ł., & Polosukhin, I. (2017). Attention is all you need. arXiv. https://doi.org/10.48550/arXiv.1706.03762
- Devlin, J., Chang, M.-W., Lee, K., & Toutanova, K. (2019). BERT: Pre-training of deep bidirectional transformers for language understanding. Proceedings of NAACL-HLT. https://doi.org/10.18653/v1/N19-1423
Your library · p. 1, abstract
We propose a new simple network architecture, the Transformer, based solely on attention mechanisms, dispensing with recurrence and convolutions entirely.
DOI resolves · 10.48550/arXiv.1706.03762
Example built from real papers and DOIs. In the editor, /library answers from the PDFs you upload, /check-sources looks each DOI up, and /find-source suggests papers for an uncited claim.
The slips your first language puts in your English
Thank you for your comprehensionThank you for your understanding
“Comprensión” is a false friend: in English it is “understanding”.
Actually, we use the old systemCurrently, we use the old system
“Actualmente” means “currently”, not “actually”.
I assisted to the conferenceI attended the conference
“Asistir a” means to attend; “assist” means to help.
temperature of samplethe temperature of the sample
Your language has no articles; English needs “the” here.
We discussed about the resultsWe discussed the results
“Обсуждать” takes a preposition; “discuss” does not.
It depends of many factorsIt depends on many factors
A calque of “зависит от”: English uses “depend on”.
Joined Sony 2020I joined Sony in 2020
Your language drops the subject; English needs it.
Yesterday I go to the clientYesterday I went to the client
The verb does not change for tense in Mandarin; English marks the past.
Sorry to bother you, if possible maybe could you send itCould you send it?
Layered politeness reads as unsure in English business writing.
He is having two carsHe has two cars
“Have” for ownership does not take the -ing form.
I am agree with the planI agree with the plan
“Agree” is already a verb; it needs no “am”.
Please do the needfulPlease take care of it
Common in Indian English, unclear to readers elsewhere.
I work here since three yearsI have worked here for three years
“Seit / depuis” becomes “for” with the present perfect.
We have discussed it yesterdayWe discussed it yesterday
A finished time like “yesterday” takes the past simple.
We will eventually postpone the launchWe may postpone the launch
“Eventuell / éventuellement” means “possibly”, not “in the end”.
Typical slips for each language group. Diglot flags them in your own draft and explains the habit behind each one.
A signed record of how the document was written
The certificate PDF Diglot issues, filled with sample data. A real one carries a QR code and a live verification link.
- Session 1 · Outline and notes22 min
- Session 2 · Drafting, two languages, 4 citations48 min
- Session 3 · Cowriter /formalize and grammar review15 min
- Certificate exported with a verification linkfree
- Example timeline. Writing the whole document in Diglot is what gives the record its weight: a pasted paragraph shows up as a paste.
Feature-by-feature comparison
| Feature | QuillBot | Diglot |
|---|---|---|
| Primary product shape | Suite of utilities (each tool in its own tab) | Single editor — translation + rewrite + grammar in one session |
| Paraphrasing strength | Best-in-category — owns the keyword | Strong, but framed as part of the workflow, not the headline |
| L1-aware corrections (knows your native language matters) | No | Yes — 84 transfer patterns across 6 L1s |
| Bilingual drafting workflow | Translation exists but is a separate utility | Native — L1 → English is the primary flow |
| AI humanizer (rewrites AI text to dodge detectors) An AI humanizer makes detectors useless for everyone, including the non-native writers detectors falsely flag. We don't think this is a tool ESL writers should rely on for academic submissions. | Yes | No — we ship Authorship Certificate instead |
| Authorship Certificate (cryptographic proof of human authorship) | ✗ | Included on all plans |
| Free tier word limit | 125 words/paraphrase, 1200 words/summary | Meaningful daily allowance across all tools |
| Plagiarism check | Premium tier, limited pages | ✗ |
Same task, both tools: paraphrasing a research finding for an essay
You're a Spanish-speaking undergrad writing on climate policy and need to paraphrase and cite a sentence from your sources. Here's what each tool does.
With QuillBot
- Open QuillBot, navigate to the paraphraser tool.
- Paste the sentence. Pick a mode (Standard / Fluency / Formal / Simple / Creative / Expand / Shorten).
- Get paraphrase: «The European Environment Agency reports a 32% reduction in EU carbon emissions from 2005 to 2022.»
- Copy paraphrase. Switch to your essay document (separate tab).
- Paste paraphrase + manually add citation. Move on to next paragraph.
The downside: Three context switches (essay → QuillBot → essay), citation handled manually, no awareness that you're a Spanish speaker who might leak Spanish patterns into the surrounding paragraphs. QuillBot's paraphrase is excellent; the workflow around it is fragmented.
With Diglot
- In Diglot editor, highlight the sentence.
- Right-click → paraphrase, OR type «/paraphrase» inline. Choose register: academic.
- Diglot suggests: «EU carbon emissions declined 32% from 2005 to 2022 (European Environment Agency, 2024).» The citation stays in place.
- Accept or refine in-place. The paragraph context above and below is also being grammar-checked — if you wrote «The reduction is significant» (missing copula not actually missing in this case, but for Spanish writers Diglot would flag ser/estar leaks throughout the surrounding text).
- Continue writing the next paragraph in the same editor. Authorship Certificate logs your keystrokes throughout — if the essay later gets falsely flagged by Turnitin as AI-influenced, you have cryptographic proof.
The upside: Zero context switches. Citation handled in-place. L1-aware grammar applies to the surrounding paragraphs as you write, not just the paraphrased sentence. Authorship Certificate runs in the background. The work happens in one frame instead of three.
Pricing
One connected writing workspace instead of paying for 4 separate subscriptions.
QuillBot ($19.95) + DeepL ($8.74) + Grammarly ($12) + Jenni ($20) = $60.69 – $81 / mo
From $15.83 / mo Save 76% ($62/mo)
QuillBot
Single-purpose utility- Free $0 limited modes
- Premium ~$8.33 / month, billed yearly
- Premium $19.95 / month, monthly
- Primary product shape Suite of utilities (each tool in its own tab)
- Paraphrasing strength Best-in-category — owns the keyword
- L1-aware corrections No
- Bilingual drafting workflow Translation exists but is a separate utility
- AI humanizer Yes
- Authorship Certificate — not included
Diglot
Complete Writing Workspace- Free$0 no card needed
- 500 words / day paraphrase
- 3,000 words / mo translation
- 10 Cowriter messages / day
- 1 Deep Research report / mo
- Authorship Certificate included
- Save 76% · Most PopularSpark$15.83 / mo, billed $190/yr $19 / month
- 30,000 words paraphrase & rewrite / mo
- 50,000 words translation · Smart AI
- 1,000 Cowriter msgs (35 skills)
- 5 Deep Research reports / mo
- 10,852 citation styles & PDF upload
- Native AI TierPro$28.33 / mo, billed $340/yr $34 / month
- Native-tier AI (publication quality)
- 50,000 words paraphrase / mo
- 100,000 words translation / mo
- 2,000 Cowriter msgs · cross-session recall
- 30 Deep Research reports / mo
Flexible on-demand word packs — no forced tier upgrades
Working on a thesis deadline or heavy paper submission? Add extra volume on demand without changing subscription tiers: +40,000 word packs ($15) and Deep Research packs are available anytime directly inside your workspace.
Pricing verified 2026-04-13. Public pricing changes — confirm on each vendor's site before purchase.
Where QuillBot ends and Diglot begins
The strongest paraphrasing-first suite — packs many utilities into one subscription at student-friendly pricing.
QuillBot grew from paraphrasing into a broad utility suite (grammar, summarization, translation, citation, AI detector, humanizer). It's strong on student price-points and breadth. Diglot is built around a different shape of work: not a bag of utilities, but a coherent bilingual workflow for non-native English writers. Here's how they actually compare.
What QuillBot sells
- Utility — many small tools in one subscription
- Breadth for the price (paraphrase + grammar + summarize + translate + cite)
- Student familiarity and pricing
- Free tools that broaden top-of-funnel
- AI detector + humanizer (controversial in ESL contexts)
Why QuillBot wins
- Very strong association with paraphrasing — owns the keyword
- Strong student mindshare
- Clear suite-value packaging at consumer price
- Free tools attract huge top-of-funnel
- Established for short utility tasks
QuillBot wins when
- Your main job is short paraphrasing tasks — that one keyword
- You are deeply price-sensitive and prefer the consumer student tier
- You already know and trust the QuillBot suite
- You need fast utility, not a deeper writing workflow
Switching from QuillBot to Diglot — practical guide
If QuillBot has been your go-to tool, here's the honest migration path. What you'll miss most depends on what you used QuillBot for.
1. Audit what you actually used QuillBot for
Be specific: 80% paraphrasing? 60% grammar + 40% paraphrasing? Heavy summarizer use? If your primary use was paraphrasing isolated paragraphs, QuillBot is purpose-built for that and Diglot doesn't displace it. If you used 3+ of the QuillBot tools regularly, you're a workspace user — Diglot's unified editor is the better fit.
2. Set up a Diglot account on the free tier
No credit card needed. Free tier supports daily writing without limits for most undergrad workloads. Spend a week using Diglot for your next assignment instead of QuillBot. Pay attention specifically to grammar feedback — is it explaining the L1 transfer pattern, not just flagging surface errors?
3. Run a side-by-side on the same paragraph
Pick a paragraph you wrote in English. Paste it into QuillBot grammar checker. Note what gets flagged and how. Paste the same paragraph into Diglot. Compare the explanations. The Diglot output should include the L1-transfer-pattern naming (e.g. `article-omission-specific`); QuillBot will give surface-level corrections without the L1 context.
4. Decide on tier based on your AI volume and plagiarism needs
QuillBot Premium includes a limited plagiarism check. Diglot does not include plagiarism checking yet (coming soon), so if a plagiarism report matters for your work (academic submissions), keep a dedicated checker for that step. Diglot Spark ($19/mo or $15.83 annual) raises the AI quotas, and the Authorship Certificate is free and unlimited on every plan. Pro ($34/mo) adds premium AI models — worth it for longer academic work.
5. Keep QuillBot Free for the edge cases (if needed)
QuillBot Free is genuinely useful for one-off paraphrase lookups. If you sometimes need paraphrase support in environments where Diglot isn't installed (mobile, certain apps), QuillBot Free is the fallback. Most users who switch keep QuillBot Free as a backup utility, not a paid subscription.
Honest about friction: QuillBot's paraphraser is genuinely best-in-category for short paraphrasing tasks — that's their core specialty and they win it. If your work is dominated by isolated paraphrasing rather than document production, sticking with QuillBot is rational. Diglot's value is the workspace shape + L1-aware corrections + Authorship Certificate — those matter most when you're producing longer English documents from native-language thinking.
Deep dive: utility suite vs unified writing workspace
The architectural difference between QuillBot and Diglot is the SHAPE of the product. QuillBot is a suite — a collection of small utilities (paraphraser, grammar checker, summarizer, translator, citation generator, AI humanizer, AI detector) that each does its job well, packaged into one subscription. The user model is: pick the tool you need, paste your text, get the output, move on. For students doing focused tasks (paraphrase a paragraph, summarize a chapter, check grammar on a draft), this is efficient.
Diglot is a workspace — a single editor where translation, drafting, rewriting, grammar checking, and AI cowriter all coexist around your actual document. The user model is: open the document you're writing, stay in it while every tool surfaces at the right moment. For students producing longer pieces (essays, papers, business documents), the workspace shape matches the work pattern. The tools are the same in both products at surface level — the difference is whether they live in one editor or many tabs.
Why does this matter? Because the cognitive cost of jumping between tools is real. ESL writers report context loss when moving a paragraph from QuillBot's paraphraser to QuillBot's grammar checker to QuillBot's summarizer to their own document — even though all four tools are «one click away», the friction adds up across a 1500-word essay. The same writer reports lower cognitive load when paraphrase, grammar, and rewrite happen inline in Diglot's editor, because the document is the constant frame.
There's a second architectural difference: QuillBot ships an AI humanizer; Diglot ships Authorship Certificate. These are INVERSE products. AI humanizers rewrite AI-generated text to dodge detectors — useful if you're trying to pass AI work as human, harmful if you're an ESL writer falsely flagged for human writing that detectors thought looked AI. Authorship Certificate cryptographically proves you typed every keystroke — useful for the falsely-flagged ESL writer, irrelevant for someone gaming detectors. QuillBot's bet is that detection is unfair and writers should be allowed to dodge it; Diglot's bet is that detection is unfair and writers should be able to prove they wrote it themselves. Both bets are coherent; ESL students should pick the one that fits their ethics.
Frequently asked questions
Is Diglot a QuillBot alternative for ESL students?
Yes, for ESL students writing longer-form work (essays, theses, papers). QuillBot wins for isolated short paraphrasing tasks. Diglot wins when you're drafting bilingually and need translation + rewrite + grammar in the same session — which is the actual shape of ESL student writing work for most assignments.
Does Diglot have an AI humanizer like QuillBot?
No, deliberately. AI humanizers exist to dodge AI detectors. We think that's the wrong direction for ESL writers: detectors already falsely flag non-native English at ~2× the rate of native (Stanford 2023), so the fight isn't to dodge them — it's to prove human authorship. That's what Authorship Certificate does. It's included on all our plans.
Why is Diglot more expensive than QuillBot's Premium?
QuillBot Premium is around $8.33/mo annual. Diglot Spark is $15.83/mo annual. The price difference reflects what we include: L1-aware grammar checking and a unified workflow rather than a suite of utilities. The Authorship Certificate is free and unlimited on every plan. If price is the primary deciding factor and your use case is short paraphrases, QuillBot is the rational choice.
Can I use QuillBot and Diglot together?
Yes — they overlap less than you'd think. Several Diglot users on Spark or Pro keep QuillBot for one-off paraphrase needs in environments where Diglot isn't installed yet (mobile, certain apps). The Diglot browser extension, in development, will close most of that gap.
Does QuillBot have an editor like Diglot?
QuillBot has individual tool pages (paraphraser, grammar checker, summarizer) plus an editor that wraps them. The editor exists, but the product shape is still suite-of-utilities — each tool feels independent. Diglot is editor-first by design: open one document, do everything inside it. For ESL writers producing essays or papers, the editor-first shape matches how the work actually flows. For QuillBot-power-users who jump tool-to-tool for specific tasks, the suite shape is fine.
How does QuillBot's AI detector compare to Authorship Certificate?
They solve opposite problems. QuillBot's AI detector tells you whether a piece of text was likely AI-generated — same product category as Turnitin, GPTZero, Originality.ai. Authorship Certificate (Diglot) is cryptographic PROOF that YOU typed text by hand. A QuillBot detector reading "this is 85% likely human" can be disputed; an Authorship Certificate timestamp chain can be verified. For ESL writers worried about false-positive flags, Authorship Certificate is the defense; for graders worried about students cheating, detectors are the offense. Different sides of the table.
Sound like you? Try Diglot free.
If «you're writing longer pieces (essays, papers, business documents) — not isolated paraphrases» describes your work, the free tier covers daily writing — no card.
No credit card required
Where to go next
QuillBot is one tool against Diglot. The picks below frame the decision against similar tools, your real workflow, and the broader category.
