Side-by-side comparison · Writing & Translation
Grammarly vs Jenni AI vs Originality.ai
Everything that matters when choosing between them, in one place: our rating, what each can do, what they cost, and the trade-offs.
Comparing 3 tools, the maximum.
At a glance
Pick it if: Anyone who writes emails, documents and messages at work and wants mistakes caught and tone checked before they hit send.
Pick it if: Students, academics and anyone writing reports that need real sources and properly formatted citations.
Pick it if: Publishers, content agencies, SEO teams and businesses that commission written content and want to check it before publishing.
Grammarly scores highest overall, but Originality.ai gives you more for your money. Which one is right comes down to what you value most.
Overview
| Attribute | Grammarly | Jenni AI | Originality.ai |
|---|---|---|---|
| In one line | Fixes grammar, clarity and tone in your writing, wherever you type. | Helps you write essays and research papers, with real citations and PDF chat. | Checks content for AI writing, plagiarism and factual errors before you publish it. |
| Pricing model | Freemium | Freemium | Freemium |
| Starting price | $12/member/mo | $0 | $14.95/mo |
| Free plan | Yes | Yes | Yes |
| Works with Claude Code | No | No | Yes |
Rating breakdown
Our scores out of 5. The higher bar in each row is highlighted.
| Attribute | Grammarly | Jenni AI | Originality.ai |
|---|---|---|---|
| Overall rating | 4.3Winner | 3.7 | 4.1 |
| Ease of useHow quickly someone non-technical gets value from it. | 5.0 | 4.0 | 4.0 |
| FeaturesHow completely it covers its own job, and how well the pieces fit together. | 4.5 | 4.0 | 4.5 |
| Output qualityHow good the results are before you fix them. | 4.0 | 3.5 | 3.5 |
| Value for moneyWhat you get for the price, including the free plan. | 3.5 | 3.0 | 4.0 |
| Speed & reliabilityHow fast it is and how often it falls over. | 4.5 | 4.0 | 4.5 |
Feature comparison
A tick means it does this today. A dash means we haven't checked.
| Attribute | Grammarly | Jenni AI | Originality.ai |
|---|---|---|---|
| Access & platform | |||
| Free plan | Yes | Yes | Yes |
| Mobile app | Yes | No | – |
| Desktop app | Yes | – | – |
| Browser extension | Yes | Yes | Yes |
| API access | – | No | Yes |
| Teams & business | |||
| Team workspace | Yes | Yes | Yes |
| Enterprise plan or SSO | Yes | – | Yes |
| Connects to other apps | Yes | Yes | Yes |
| Open source or self-hosted | No | No | No |
| AI abilities | |||
| Works with your files | – | Yes | Yes |
| Understands images | – | – | – |
| Makes images | No | No | No |
| Makes video | No | No | No |
| Writes code | No | No | No |
| Runs agents or automations | – | No | No |
| Learns your brand or style | Yes | – | – |
| Works in many languages | – | Yes | – |
| Capabilities score | 8/ 17 | 6/ 17 | 7/ 17 |
Pricing
Plans as listed on each vendor's site when we last checked. Confirm before you buy.
| Attribute | Grammarly | Jenni AI | Originality.ai |
|---|---|---|---|
| Plans | Free Free Basic spelling and grammar checks. | Free $0 Trying it on one assignment. | Free Free Checking the odd article. |
ProOur pick $12/member/mo billed yearly, or about $30 monthly Anyone who writes a lot at work, alone or in a team. | PlusOur pick $30/mo, or $12/mo billed yearly Students writing most weeks. | ProOur pick $14.95/mo, or $12.95/mo billed yearly Agencies and site owners checking content every week. | |
Enterprise Custom Large organisations with security needs. | Pro $73/mo, or $29/mo billed yearly Researchers and heavy users. | Enterprise $179/mo, or $136.58/mo billed yearly Publishers and large content teams. | |
| Which plan to pick | Free is enough for typo-catching. If you write for clients or customers every day, Pro on yearly billing is good value; paying monthly costs more than double. | Try Free on one piece of work. If you'll use it all semester, Plus on yearly billing is the sensible pick. Pro only makes sense if you hit Plus's monthly limits. | Pro is enough for most agencies and site owners. An AI and plagiarism check together uses two credits per 100 words, so budget about 100,000 words of checked content a month. Go Enterprise only if you need the API or very high volume. |
Key features
| Attribute | Grammarly | Jenni AI | Originality.ai |
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Pros and cons
| Attribute | Grammarly | Jenni AI | Originality.ai |
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Who each one is for
| Attribute | Grammarly | Jenni AI | Originality.ai |
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Questions people ask
Which is better, Grammarly, Jenni AI or Originality.ai?
Grammarly scores highest overall in our ratings (Grammarly 4.3/5, Jenni AI 3.7/5 and Originality.ai 4.1/5). Grammarly is best for proofreading emails and documents as you type and checking tone before a tricky message goes out. Jenni AI is best for writing essays and research papers and adding citations in APA, MLA or Harvard. Originality.ai is best for checking freelance and agency content and AI and plagiarism checks in one scan.
Which is cheaper, Grammarly, Jenni AI or Originality.ai?
Grammarly: There's a free plan, and paid plans start at $12/member/mo. Jenni AI: There's a free plan, and paid plans start at $0. Originality.ai: There's a free plan, and paid plans start at $14.95/mo.
Which is easier to use, Grammarly, Jenni AI or Originality.ai?
Grammarly rates highest for ease of use in our scores. Anyone who writes emails, documents and messages at work and wants mistakes caught and tone checked before they hit send.
How we compare
Ratings are our own, from using each tool, across ease of use, features, output quality, value for money, speed & reliability.
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