Diglot vs Grammarly
Grammarly fixes the sentence. Diglot also tells you which habit from your first language caused the mistake, so it stops coming back.
- You think in another language and your English drafts get flagged as "translated-sounding"
- You repeatedly copy-paste between Translate, ChatGPT, and Grammarly all day
- You need translation + rewrite + grammar in one editor, not three tabs
- Your essay was falsely flagged as AI by Turnitin/GPTZero and you need authorship proof
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.
Every correction names the habit behind it
Grammarly is broad, not sharp — built for users who already think in English. Diglot is built for users who think in another language first and draft bilingually.
- Set your first language once; each suggestion says which pattern from it caused the error.
- The same pattern gets the same name every time, so you start catching it yourself.
- Draft in your own language when English is slow, then turn it into English in the same document.
Write in your language
Stuck on a sentence? Write it in your language first
Type the hard part in the language you think in. Diglot turns it into English inside the same document and keeps your terms with a personal glossary.
- The rest of your English stays as it is
- Use the translation, or insert it below
- Your glossary keeps your terms
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
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 | Grammarly | Diglot |
|---|---|---|
| L1-aware grammar correction (treats errors as transfer patterns, not random typos) Built on a base of 84 transfer patterns across 6 native languages. | No — corrects errors locally without L1 context | Yes — flags Russian/Spanish/Chinese/Japanese/Korean/Arabic transfer patterns explicitly |
| Bilingual drafting (write in L1, output English in same session) | Partial — translation is a separate flow | Native — L1 → English is the primary workflow |
| Cross-app browser/desktop extension | Mature, present everywhere | Browser extension in development |
| Plagiarism check | Premium tier | ✗ |
| Authorship Certificate (cryptographic proof you wrote it, not AI) Useful when AI detectors falsely flag non-native English at ~2× the rate of native (Stanford 2023). | ✗ | Included on all plans |
| Team and enterprise controls | Mature — style guides, snippets, brand tones, analytics | On the roadmap |
| Free tier usable for real work | Limited — most useful features behind Premium | Yes — meaningful daily word allowance |
Same task, both tools: writing a research abstract
You're a Russian PhD student writing a materials science abstract: «We measured temperature of sample during heating to 800°C. The result significant.»
With Grammarly
- Paste into Grammarly: 4 errors flagged.
- «temperature of sample» → suggested «the temperature of the sample» (no explanation why).
- «result significant» → suggested «result is significant» (flagged as «missing verb»).
- «Method robust» → suggested «Method is robust» (same generic flag).
- «Three of paper» → flagged as «possible typo», suggested «Three of papers» (wrong — should be «Three papers»).
The downside: Three of four corrections are surface-only. Grammarly didn't explain the underlying Russian transfer pattern (article-omission, copula-deletion, classifier-influenced phrasing). You fix this abstract, but the next abstract will leak the same patterns because the engine taught you nothing about why.
With Diglot
- Paste into Diglot (configured with Russian as L1).
- «temperature of sample» → `article-omission-specific` (Wade 2010): Russian has no article system; specific-reference articles drop. Example→corrected pair shown.
- «result significant» / «Method robust» → `missing-copula-be-present`: Russian present tense omits копулу («дом большой» = house big). Both flagged with same pattern key.
- «Three of paper» → `classifier-of-leak`: pattern shared with Mandarin speakers, sometimes appears in Russian writers exposed to Mandarin. Suggested «Three papers».
- After correction, Authorship Certificate logs your keystrokes as proof of human authorship — useful if the abstract later gets falsely flagged by Turnitin / GPTZero.
The upside: Each correction is also a small lesson. After 2-3 weeks of consistent Diglot use, a Russian researcher reports recognizing article-omission as it happens, before the engine flags it. The engine gradually fades into the background as the writer internalizes the L1-transfer signature.
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)
Grammarly
Single-purpose utility- Free $0 basic checks
- Pro ~$12 / month, billed yearly
- Business ~$15 / seat / month, yearly
- L1-aware grammar correction No — corrects errors locally without L1 context
- Bilingual drafting Partial — translation is a separate flow
- Cross-app browser/desktop extension Mature, present everywhere
- Plagiarism check Premium tier
- Authorship Certificate — not included
- Team and enterprise controls Mature — style guides, snippets, brand tones, analytics
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 Grammarly ends and Diglot begins
The dominant brand in broad AI-assisted writing — strongest for users who already think in English.
Grammarly is the strongest brand in broad AI-assisted writing. If you write in English natively and want to polish what you produced, it's a category-defining tool. Diglot is built for a different writer: someone who thinks in one language and publishes in English. The comparison below is honest — Grammarly wins for several use cases, and we say so.
What Grammarly sells
- Confidence at scale across every app
- Cross-platform writing assistance (browser, desktop, mobile)
- Enterprise-ready governance — style guides, snippets, analytics
- Multilingual support layered on an English-first base
- Team controls and brand tones
Why Grammarly wins
- Strongest trust and brand recognition in the category
- Broadest perceived coverage for mainstream English users
- Huge integration footprint (Word, Google Docs, Outlook, all browsers)
- Strong team and admin packaging
- Increasingly credible multilingual story
Grammarly wins when
- You write in English natively and want correction across every app
- Your team needs enterprise admin controls and brand-tone enforcement today
- You want the biggest-brand default and your buyer values trust over fit
- You only need polish on already-English drafts, not bilingual workflow
Switching from Grammarly to Diglot — practical guide
Switching or piloting Diglot alongside Grammarly? Here's the practical path. Honest about friction: you'll miss Grammarly's cross-app footprint most.
1. Identify your primary writing surface
Where do you actually do most of your writing? Google Docs, Word, Notion, native web editor? If it's a single document tool, Diglot's web editor (web.diglot.ai) replaces it cleanly. If you write across many apps, keep Grammarly for the spillover apps initially and use Diglot for primary document work.
2. Sign up for the free tier first
No credit card needed. Free tier is meaningful for daily writing — typical ESL undergrad workload fits without hitting limits. Spend 1-2 weeks writing as you normally would; pay attention to L1-aware grammar feedback as a learning signal, not just corrections.
3. Run your existing English drafts through Diglot
Take a paragraph from a recent essay or business email. Paste it into Diglot and run grammar check. Compare what Diglot flags vs what Grammarly flagged. The Diglot output should include both surface errors AND the L1-transfer-pattern naming for each. This is the «aha» moment most ESL writers report.
4. Decide on Spark vs Pro for longer work
Spark ($19/mo) adds larger AI quotas — sufficient for most undergrad/grad work. The Authorship Certificate is free and unlimited on every plan. Pro ($34/mo) adds premium AI models (better academic register) — worth it if you write research papers, theses, or professional documents regularly.
5. Cancel Grammarly when comfortable
If you're keeping Grammarly's browser extension for cross-app coverage, downgrade to Grammarly Free (still useful) and run Diglot Spark/Pro for primary work. If you're going all-in on Diglot, cancel Grammarly entirely once the browser extension ships (estimated Q3-Q4 2026).
Honest about friction: Real friction points: (1) Grammarly's Microsoft Word desktop integration is mature; Diglot doesn't have an equivalent yet. (2) If your team uses Grammarly Business with shared style guides, those don't migrate. (3) Diglot's free tier is more generous than Grammarly Free for daily writing, so the «free tier reset» is rarely a problem.
Deep dive: why L1-aware grammar correction changes the work
The core architectural difference between Diglot and Grammarly is what the grammar engine *knows about you*. Grammarly's engine is language-agnostic — it sees your sentence «We measured temperature of sample» and flags it as «missing article: the». You add «the», submit your essay, and three months later you're still dropping articles in front of specific nouns because nobody told you WHY. The error is fixed locally; the underlying pattern stays.
Diglot's engine, when configured for Russian (or one of the other 5 deeply-modeled L1s), recognizes the same sentence as the `article-omission-specific` pattern — a known Russian-to-English transfer where Russian's lack of an article system causes specific-reference articles to drop on every cycle. The correction surfaces with context: «Russian writers face this on first-mention specific nouns; Wade 2010 documents the pattern across academic Russian-English writing. Here's the example→corrected pair you can recognize next time.» You're not just fixing this sentence — you're calibrating your future writing.
This matters more than it sounds. ESL writers report «I correct my English and it still sounds translated» as their top frustration. The reason: surface error correction without L1 explanation gives the writer no model for the underlying drift. After a year of Grammarly use, a Russian researcher's English often still reads as Russian-influenced because the corrections didn't build a model of the transfer signature. After three months of Diglot use, the same writer typically internalizes the top 4-5 transfer patterns and the «sounds translated» frequency drops noticeably — because each correction is also a small lesson.
Grammarly's bet is breadth (every app, every writer, generic corrections). Diglot's bet is depth (one editor, the specific ESL writer, L1-modeled corrections). Both bets are real and serve different audiences. If you write in English natively and want surface polish across all apps, Grammarly's breadth wins. If your hardest problem is escaping your L1's transfer signature, Diglot's depth is the tool built for that.
Frequently asked questions
Is Diglot a Grammarly alternative for ESL writers?
Yes — that's the specific audience Diglot is built for. Grammarly works well for users who already write in English natively. If your first language is something else and your English writing gets flagged as sounding translated, Diglot is the tool you should evaluate. We don't replace Grammarly for native English users.
Can I use Diglot in Google Docs and Word like Grammarly?
Not yet across all surfaces — Diglot's editor is currently web-first (web.diglot.ai), with a browser extension and a Google Workspace Add-on in development. Grammarly's cross-app footprint is larger today. If cross-app extension is your primary need, Grammarly wins; if bilingual workflow is, Diglot wins.
Does Diglot do everything Grammarly does?
No — and we don't try to. Diglot includes the core writing tools (grammar, rewriting, translation) plus a free Authorship Certificate, but we don't replicate Grammarly's enterprise admin layer or its integration footprint. We focus on what non-native English writers actually need.
Is Diglot more expensive than Grammarly?
Diglot Spark is $19/mo (or $15.83/mo annual), Pro is $34/mo (or $28.33/mo annual). Grammarly Pro is around $12/mo. We are positioned above on price because we include workflow tools (translation, L1-aware corrections) that Grammarly does not, and our free tier is more useful for real daily work. The Authorship Certificate is free and unlimited on every plan.
Can I use Grammarly and Diglot at the same time?
Technically yes — they don't conflict architecturally. In practice, running both editors over the same text creates noise: Grammarly flags generic surface errors while Diglot flags the same errors as L1-transfer patterns. Most users who tried both keep Grammarly for cross-app coverage (Slack, Outlook drafts, anywhere outside the writing tool) and use Diglot exclusively for longer document work. Once Diglot's browser extension ships, the cross-app gap narrows and the dual-tool pattern becomes unnecessary for ESL writers.
What about Grammarly's Premium AI generation features?
Grammarly Premium added GPT-style generation in 2023 — write a prompt, get drafted text. Diglot's Cowriter is the parallel feature, with three modes: Ask (answer questions about your draft), Edit (transform selected text), Plan (outline a structure before writing). The architectural difference is that Cowriter preserves YOUR voice — it suggests, you accept/edit, and Authorship Certificate logs your keystrokes as proof. Grammarly's generation feature inserts AI text at scale without that authorship-preservation chain.
Will switching from Grammarly cost me my saved settings or style guides?
If you've invested heavily in Grammarly's enterprise style guides, snippets, or brand voice tuning, those don't migrate — they're proprietary to Grammarly's admin layer. For individual users with no enterprise config, there's nothing to migrate; just sign up and start. Diglot's equivalent (team admin, custom glossaries) is on the roadmap. For now, individual ESL writers gain L1-aware corrections + Authorship Certificate; enterprise teams should pilot Diglot alongside Grammarly rather than swap.
Sound like you? Try Diglot free.
If «you think in another language and your english drafts get flagged as "translated-sounding"» describes your work, the free tier covers daily writing — no card.
No credit card required
Where to go next
Grammarly is one tool against Diglot. The picks below frame the decision against similar tools, your real workflow, and the broader category.
