Side-by-side comparison · Writing & Translation
Grammarly vs Hemingway Editor vs Undetectable 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: Business owners, marketers and bloggers who want their website copy, emails and posts easier to read.
Pick it if: Marketers and writers who use AI for first drafts and want them to sound less robotic.
Overview
| Attribute | Grammarly | Hemingway Editor | Undetectable AI |
|---|---|---|---|
| In one line | Fixes grammar, clarity and tone in your writing, wherever you type. | Highlights hard-to-read sentences so your writing is clear, and rewrites them with AI. | Rewrites AI-written text so it reads more human and is less likely to get flagged. |
| Pricing model | Freemium | Freemium | Freemium |
| Starting price | $12/member/mo | $0 | $0 |
| 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 | Hemingway Editor | Undetectable AI |
|---|---|---|---|
| Overall rating | 4.3 | 4.3 | 3.6 |
| Ease of useHow quickly someone non-technical gets value from it. | 5.0 | 5.0 | 4.0 |
| FeaturesHow completely it covers its own job, and how well the pieces fit together. | 4.5 | 4.0 | 3.5 |
| Output qualityHow good the results are before you fix them. | 4.0 | 4.0 | 3.0 |
| Value for moneyWhat you get for the price, including the free plan. | 3.5 | 4.0 | 3.5 |
| Speed & reliabilityHow fast it is and how often it falls over. | 4.5 | 4.5 | 4.0 |
Feature comparison
A tick means it does this today. A dash means we haven't checked.
| Attribute | Grammarly | Hemingway Editor | Undetectable AI |
|---|---|---|---|
| Access & platform | |||
| Free plan | Yes | Yes | Yes |
| Mobile app | Yes | No | No |
| Desktop app | Yes | – | – |
| Browser extension | Yes | No | Yes |
| API access | – | No | Yes |
| Teams & business | |||
| Team workspace | Yes | Yes | No |
| Enterprise plan or SSO | Yes | Yes | – |
| Connects to other apps | Yes | No | No |
| Open source or self-hosted | No | No | No |
| AI abilities | |||
| Works with your files | – | – | Yes |
| Understands images | – | – | Yes |
| 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 | Yes | – |
| Works in many languages | – | – | Yes |
| Capabilities score | 8/ 17 | 4/ 17 | 6/ 17 |
Pricing
Plans as listed on each vendor's site when we last checked. Confirm before you buy.
| Attribute | Grammarly | Hemingway Editor | Undetectable AI |
|---|---|---|---|
| Plans | Free Free Basic spelling and grammar checks. | Free $0 Checking how readable your writing is. | Free $0 Testing one short piece. |
ProOur pick $12/member/mo billed yearly, or about $30 monthly Anyone who writes a lot at work, alone or in a team. | Individual 5K $100/yr ($8.33/mo) Occasional AI help. | 10K words $9.99/mo, or $5/mo billed yearly ($60) Occasional use. | |
Enterprise Custom Large organisations with security needs. | Individual 10KOur pick $150/yr ($12.50/mo) Writers editing most days. | 20K wordsOur pick $19/mo, or $9.50/mo billed yearly ($114) Regular blog content. | |
Team 10K $150/user/yr ($12.50/user/mo) Teams of up to 50. | Larger plans From $31/mo, or $15.75/mo billed yearly Agencies and high volume. | ||
Enterprise Custom Large organisations. | |||
| 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. | Use the free editor first. If you want the fixes done for you, try Editor Plus free for two weeks. Individual 10K is the best value if you write most days. Monthly billing is available but costs more than yearly. | Test the free 250 words on your own writing first. If the output works for you, a small yearly plan is cheap. Word credits reset monthly, so don't buy more than you use. |
Key features
| Attribute | Grammarly | Hemingway Editor | Undetectable AI |
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Pros and cons
| Attribute | Grammarly | Hemingway Editor | Undetectable AI |
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Who each one is for
| Attribute | Grammarly | Hemingway Editor | Undetectable AI |
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Questions people ask
Which is better, Grammarly, Hemingway Editor or Undetectable AI?
They tie on our overall rating (Grammarly 4.3/5, Hemingway Editor 4.3/5 and Undetectable AI 3.6/5). Grammarly is best for proofreading emails and documents as you type and checking tone before a tricky message goes out. Hemingway Editor is best for making website and blog copy easier to read and checking a reading grade level. Undetectable AI is best for Making AI drafts sound less robotic and seeing how detectors might score your text.
Which is cheaper, Grammarly, Hemingway Editor or Undetectable AI?
Grammarly: There's a free plan, and paid plans start at $12/member/mo. Hemingway Editor: There's a free plan, and paid plans start at $0. Undetectable AI: There's a free plan, and paid plans start at $0.
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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