5 Ways to Compare ProWritingAid vs. Grammarly in 2019

Brad Smith


I'm the creator of this site (Grammar Gang). I'm also the founder of Codeless, a long-form content creation company that's been featured in The New York Times, Business Insider, The Next Web, and hundreds more.

We produce around ~100 long, in-depth articles each month. So we're relying on these tools on a daily basis. Here, I break down the good, bad, and uuuuuuggggllllyyyy.
Brad Smith

Grammarly is at or near the top of the grammar game.

But, that doesn’t mean it’s perfect.

Or even the one you should definitely use.

It has a few drawbacks. And there are other options out, like ProWritingAid, that are as good or better than Grammarly in certain areas.

So how do these two titans stack up? Let’s compare them across five key categories to find out.

Grammarly
Monthly (Paid Annual)
$11.66
Best All-Around
★★★★★
✅ 86/86% accuracy
✅ 16+ billion database
✅ 150k word limit
✅ 5 device limit
✅ 1 hour response
❌ English only
Visit Grammarly
ProWritingAid
Monthly (Paid Annual)
$4.16
Best Budget
★★★★
✅ 62%, 73%, 52%
✅ Unlimited words
✅ Unlimited devices
✅ Four apps
❌ English only
❌ Millions database
Visit ProWritingAid

Feature #1. Accuracy & Database

It’s tough to find a specific number for the size of ProWritingAid’s database. The most I got was somewhere in the “millions.”

That sounds nice on paper, but can it compare to Grammarly’s 16-billion large?

It seems to for grammar. Upload a doc or enter your copy, and you’ll get a complete breakdown of scores across Grammar, Spelling, Style, and an Overall.

ProWritingAid Grammar Checker Reporting

This is a little different than Grammarly’s all-in-on score, so it’s tough to compare apples to apples. But both seem excellent based on my tests.

ProWritingAid Vocabulary Report

For example, the Vocabulary option will break down unusual words you use, along with the most used (or overused ones) to watch out for.

I also loved the Flesh-Kincaid analysis to help figure out where your readability stacks up across several different markers:

ProWritingAid Reading Comprehension Report

Plus, the Writing Style report gave insight into those common writing mistakes, like passive voice, which plague us all.

ProWritingAid Writing Style Report

Grammarly, meanwhile, gives you an overall rank or score based on comparisons across all the other content they check.

Grammarly reporting toolbar results

And then they also separate out different sections like Spelling, Conciseness, Clarity, and more.

The Spelling one, for instance, will catch the most glaring snafus:

Grammarly spelling result test

And it’ll not just catch sentence fragments, but also give some context as to why these spotted issues are technically wrong.

Grammarly grammar sentence fragment example

Winner: Grammarly

This one is really tough to score. Both ProWritingAid and Grammarly excel in this area.

They both offer large databases to accurately score your work.

They both breakdown overall scores into key areas so you can see exactly how and where your mistakes pop up.

And both provide recommendations with context to help you actually improve as a writer.

It’s like splitting hairs. They’re both excellent in this area.

However, I’m giving Grammarly the tiniest of edges for two reasons:

  1. It has a bigger database to check your grammar against, and
  2. That database keeps getting bigger, because they also compare you against all the other content added to their system.

Feature #2. Limitations & Device Usage

Both ProWritingAid and Grammarly have free options.

However, I’d only classify one of those as a ‘good’ free option that you could conceivably use for longer than a few weeks.

ProWritingAid’s free plan restricts you to 19 writing reports, 500 words at a time, and online-only use.

Those free restrictions aren’t bad if you just need to use the service one time. But you’ll probably get frustrated quickly if you’re looking for an ongoing (free) solution.

The Grammarly free limitations, by comparison, are much better. So you’d probably be fine installing the Chrome extension, for example, and never even considering the Premium option.

These browser extensions will flag all of the mistakes you make across each tab, like Gmail.

Grammarly Gmail spell check

Things change slightly when we compare those paid plans, though.

Once again, it’s a tight race. Both paid plans are excellent, offering tons of use with little restrictions.

They both have apps for pretty much every device you use, including an excellent ProWritingAid Chrome app of their own.

ProWritingAid Chrome Extension

Both offer apps for Safari and FireFox.

ProWritingAid and Grammarly have Open Office and Microsoft Office-friendly apps. (Although, Grammarly’s doesn’t work with Mac, only Windows). Each tool gets added directly in the product so you can run checks without having to leave your writing app.

ProWritingAid Word Grammar Checker

However, only ProWritingAid integrates directly with Scrivener, the screenwriting and book writing specialty app.

Premium Grammarly plans do have a few limitations, numbering into 150,000 monthly words. But that’s pretty high. We use Grammarly at my company, where we create a hundred long-form articles a month, and have never hit that limit.

ProWritingAid, on the other hand, offers unlimited — yes, unlimited — checks for premium users. Zero restrictions at all.

Winner(s): Grammarly for Free, ProWritingAid for Paid

Another dead heat, but this time, ProWritingAid edges the victory for paid device usage and limitations. (They can’t compete with Grammarly’s free plan.)

The reasons come down to (a) unlimited checks and (b) better device integration, including Scrivener.

Feature #3. Customer Service Response

Neither ProWritingAid or Grammarly offer live chat, so you’ll have to submit a question and wait for the email response.

I did exactly that with both of them.

You’ll see a little “Help” icon inside ProWritingAid.

ProWritingAid Hep Email Icon

Click on it, and you can navigate past the help desk articles to submit a message.

ProWritingAid Customer Support Outreach

ProWritingAid got back to me around a day later, with this friendly response:

ProWritingAid Customer Response Email Reply

My only quibble is that the response might contradict what’s on the site. I’ve read in several places that you can only access the free version online, and you can’t run as many reports (19).

Grammarly’s customer service flow is similar, where you can submit a request and they’ll get back to you soon.

ProWritingAid contact form submission

In this case, it only took them one hour to respond! Lightening fast.

ProWritingAid customer support rep Christine's response

It was also a thorough answer, going into details around the question I asked.

ProWritingAid support rep Christine's answer

Winner: Grammarly

ProWritingAid’s customer response wasn’t bad, but Grammarly’s was just that good.

It’s the best I’ve seen out of over checking over 20+ different tools to date. I was really impressed.

Feature #4. Multilingual Options

This is the part that I usually compare all of the different languages each grammar or plagiarism tool checks.

Except, in this case, they both only offer English.

So it’s not much of a contest!

You do get different styles, like British vs. Canadian vs. American. But that’s not much of a ‘multilingual’ option in any event.

Winner: Push

Neither option is good for multilingual users. Try WhiteSmoke or Ginger instead.

Feature #5. Costs

This is another easy answer.

Yes, Grammarly’s free plan is better than ProWritingAid’s.

However, ProWritingAid’s paid plan is much, much cheaper than Grammaraly’s costs.

You can pick up ProWritingAid’s Premium annual plan for as little as $50!

ProWritingAid Grammar Pricing and Plans

And if you know the right people, you can bring this cost down even more with a coupon. For example, I only paid $36 for the year:

ProWritingAid Receipt

Now, compare that to Grammarly. I’m a happy paying customer, but that doesn’t change the fact the annual option will set you back $139.95.

Grammarly annual billing receipt

In comparison, you can pay ~$30 bucks more than this with ProWritingAid and get a lifetime plan! That’s a massive deal for what you’re getting in return.

Winner: ProWritingAid

If Grammarly had one big fat Con, it would be the price. It’s more expensive than almost every other alternative.

ProWritingAid, on the other hand, is among the cheapest options out there.

So if your budget is a concern, there’s only one true winner here.

ProWritingAid vs. Grammarly: Which One Wins?

This is a really tight race. Both are good options.

There’s not clear winner per se. So, here’s how I would break down the recommendation:

  • If price is a concern or you want extended app access, go with ProWritingAid.
  • If accuracy is your goal and customer service is critical, go with Grammarly.
  • If you need multiple languages, don’t go with either.

The good news is that you can’t really go wrong with either option.