Pangram vs Trinka
We give Pangram a 2.6 GPA and Trinka a 2.8, out of 4.0. Pangram grades higher on the free plan. Trinka grades higher on value for money and features. They get the same grade on ease of use and platforms.
Price, platforms and features side by side. The table says where each price was read and when.
Pangram
Detects AI-written text and images, with a free daily allowance
Trinka
AI grammar checker and writing assistant for academic writing
How we grade them
| 2.6GPAPangramGood | 2.8GPATrinkaGood | |
|---|---|---|
| Value for money | CGraded against its own alternatives, as it checks text rather than helping you write it. Individual is $15 a month billed yearly ($20 monthly) for 300,000 words, above Grammarly's and Paperpal's $12 and nearly twice QuillBot's $8.33, which all do more besides. | BPremium is $48 a year, which is $4 a month and inside this category's cheapest quarter, shown with $80 crossed out. Don't pay monthly, at $20, and remember plagiarism reports cost credits on top: 24 for a standard report. |
| Free plan and trial | BFree for good with no payment method: 20 credits a day, about 2,000 words, plus 3 image scans, and it resets daily. One person checking the odd essay or article could live on that. A teacher marking a whole class in an evening couldn't. | CBasic never expires and needs no card, but these are caps you'll meet quickly: 5,000 words of writing help a month, grammar checks in Lite mode, 5 AI writing requests and 4 credits. Proofread files come back read-only. |
| Features | CIt does AI detection fully: scores and marked passages across 20+ languages, image checks, similarity checks, OCR for scanned files and feed scanning. But it's a much smaller job than a writing tool's, as it only tells you who wrote the text. | BIt covers the whole job: grammar, tone and technical spelling following APA, AMA, ACS, AGU and IEEE style on paid plans, whole Word and LaTeX files proofread with tracked changes, a paraphraser, retracted-reference flags and a Journal Finder for where to submit. |
| Ease of use | BNo store rating on record, but there's nothing to set up: paste the text or upload a file, and the result comes back with the suspect passages marked. | BNo store rating on record, so we go on the listing: it works where you already write, in a web editor, browser extensions and Word add-ins, with nothing to set up. The credit system takes a minute, mind: a standard plagiarism report is 24 credits. |
| Platforms and integrations | BWeb and a Chrome extension, with Google Docs and Gmail on paid plans, Canvas, Moodle, Google Classroom and Brightspace for schools, and an API. No desktop or phone app. | BA web editor, browser extensions, Word add-ins and a Windows app in beta, working inside Word, Outlook, Google Docs, Evernote, Medium, Canvas and Moodle, with an API on Enterprise. That list earns the B; there's no Mac desktop app and no mobile app. |
| Best for | checking whether text was written by AI | grammar checks on academic papers |
The GPA is the average of the five grades: an A is 4 points, an F is none. The full reasons are on each tool's page: Pangram and Trinka. How we grade
Price against what you get
Pangram starts at $15 a month and scores 2.7 out of 4 on features, ease of use and platforms. Trinka starts at $4 a month when paid by the year and scores 3.0.
Trinka scores higher and starts $11 a month lower. Of the other writing tools on the chart, 14 score higher than Pangram for less, and 1 scores higher than Trinka for less.
Features, ease of use and platforms, averaged
What paid plans start at, a month (each step along is roughly double) →
- The best score at each price
- Has a free plan
- No free plan
Where they differ
- Pangram starts at $15 per month, billed annually ($20 billed monthly). Trinka starts at $48 per year, billed annually (shown with $80 crossed out).
- Only Trinka lists a Windows app.
- Trinka also covers citations and grammar & style.
At a glance
| Pangram | Trinka | |
|---|---|---|
| Pricing | Free plan | Free plan |
| Starts at | $15 per month, billed annually ($20 billed monthly) | $48 per year, billed annually (shown with $80 crossed out) |
| Free plan | 20 credits a day, enough for 2,000 words, plus 3 image scans a day, file uploads and scans of single social posts. No payment method needed. | Basic plan: 5,000 words of writing assistance a month, grammar check in Lite mode, the standard paraphraser, 5 AI writing requests and 4 free credits a month. It does not expire and needs no card. |
| Free trial | 7-day free trial of the Individual and Team plans; Professional is billed at sign-up | 7-day free trial offered on the Confidential Data plan |
| Web | ||
| Windows | ||
| Browser extension | ||
| Made by | Pangram Labs | Crimson AI |
| Price read from | pangram.com | trinka.ai |
| Checked | Oct 18, 2026 | Oct 9, 2026 |
Who each one suits
Pangram
- Teachers and professors checking student work for AI writing
- Editors and publishers screening submitted articles
- Developers adding AI detection to their own apps through the API
Trinka
- Researchers and students preparing papers, theses and journal submissions
- Non-native English speakers writing academic or technical text
- People who must keep drafts out of storage and AI training
Worth knowing
Pangram
- The free plan stops at 20 credits a day: one credit is 100 words, rounded up, so it covers about 2,000 words. Credits reset daily.
- API use is billed apart from the seat plans at $0.05 per 100 words; of the self-serve plans, only Professional includes API credit.
- Refunds apply only to individual plans, within 14 days of purchase and with fewer than 20 credits used.
- Zero data retention, custom hosting and custom LMS or ATS integrations need the sales-priced Enterprise plan.
Trinka
- The free Basic plan stops at 5,000 words of writing assistance and 5 AI writing requests a month.
- Premium Plus and Confidential Data are sold on annual billing only; Premium alone has a monthly price.
- Plagiarism reports on Basic and Premium are paid for with credits: 24 for a standard report, 36 for an advanced one.
- Apps listed are a web editor, browser extensions, Word add-ins and a Windows app in beta; there is no Mac desktop app or mobile app.
Key features
Pangram
- AI text detection
- Scores a text for AI generation and marks AI-written or AI-assisted segments; Pangram benchmarks it against 26 models from OpenAI, Anthropic, Google and others.
- AI image detection
- Checks JPG, PNG or WebP images of at least 512 x 512 pixels for AI generation: 3 a day free, 100 a month on Individual and 500 on Professional.
- Similarity checks
- Paid plans can run a similarity (plagiarism) check on any scan; each one uses 5 credits, or 500 words of allowance.
- Chrome extension and feeds
- The Chrome extension checks text in the browser, and on paid plans it automatically scans your feeds on social media, Substack and similar sites.
- Docs, Gmail and school systems
- Paid plans add Google Docs and Gmail; schools connect it to learning systems such as Canvas, Moodle, Google Classroom and Brightspace.
- Developer API
- A pay-as-you-go API costs $0.05 per 100 words, with 20% off for batch submissions sent asynchronously.
Trinka
- Grammar and style checks
- Checks grammar, technical spelling, tone and sentence structure for formal writing. Paid plans add Power mode and corrections that follow the APA, AMA, ACS, AGU and IEEE style guides.
- Proofread File
- Edits whole Microsoft Word and LaTeX files with formatting kept. Paid plans return an editable file with tracked changes; the Basic plan gives a read-only result. One credit covers 5,000 words.
- Paraphraser and AI writing
- Rewrites text in several modes and generates or expands drafts on request. Monthly AI requests are capped at 5 on Basic, 25 on Premium and 1,000 on Premium Plus.
- Plagiarism and AI detection
- Plagiarism reports cost 24 credits (standard) or 36 credits (advanced), and the AI detector 1 credit per 5,000 words. Premium Plus includes 240 pages a year of standard checks.
- Citation tools and Journal Finder
- A citation checker flags retracted and unverifiable references, a formatter applies major citation styles, and Journal Finder suggests journals for a manuscript.
- Confidential Data plan
- A separate plan that deletes processed text in real time, does not use it for AI training and includes an offline grammar checker app.
Plans
Pangram
Free$0
Up to 2,000 words and 3 image scans a day, file uploads and single-post scans on social media and Substack.
Individual$15
per month, billed annually ($20 billed monthly)
300,000 words and 100 image scans a month, similarity checks, OCR for scanned files, automatic feed scanning, and Google Docs and Gmail.
Professional$45
per month, billed annually ($65 billed monthly)
Individual features at 5 times the volume: 1,500,000 words and 500 image scans a month, plus $200 of API credit each month.
Team$20
per seat / month from 2 seats, billed monthly
Individual features for each member, with an admin and member dashboard and one bill; $40 a month for the first 2 seats.
EnterpriseCustom
Sold through sales: API access, zero data retention and custom hosting, custom LMS or ATS links, volume pricing and dedicated support.
Trinka
Basic$0
5,000 words of writing assistance a month, Lite-mode grammar check, 5 AI writing requests, 4 free credits a month and read-only file proofreading.
Premium$48
per year, billed annually; or $20 per month billed monthly
Full writing features, style guides, 25 AI requests and 10 credits a month. The yearly price is shown with $80 crossed out, a 40% discount with no stated end date.
Premium Plus$125
per year, annual billing only
Adds file translation, 1,000 AI requests and 20 credits a month, and 240 pages a year of standard plagiarism or AI-detection checks.
Confidential Data$300
per year, billed annually
Real-time data deletion, no AI training, an offline grammar checker app and 1,000 pages a year of plagiarism or AI checks. Shown with $500 crossed out.
EnterpriseCustom
Quoted plans for teams: user management, usage analytics, feature customization, API, SDK and on-premise options, and white labeling.
InstitutionCustom
Writing assistance plus the DocuMark academic integrity tool for universities, with LMS and SSO integration. A no-cost pilot can be requested.
Ways to pay less
Pangram
- Annual discount
Save $60 to $240 a year with annual billing
Individual is $15 a month billed annually against $20 monthly (save $60), Professional $45 against $65 (save $240), and a 2-seat Team saves $120.
Trinka
- Annual discount
Save 67% with yearly billing
The pricing page labels yearly billing as a 67% saving: Premium is $20 a month when billed monthly, against a regular yearly price of $80.
- Education
Student discounts on request
Trinka's pricing FAQ says discounts for PhD students are available by contacting its support team. No rate is published.
