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GrammarBot Neural finally makes it possible to deliver grammar and spelling correction comparable to a human!

What's it Worth?

The difference between an average grammar checker and a state-of-the-art checker is the difference between you having a customer that converts and you having a customer that leaves. It's the difference between a customer impressed by the quality of your product or disappointed with its shortcomings. We are proud to offer a product that reflects positively on your business (as well as ours).


  • Accuracy - state-of-the-art is the phrase we use because we have yet to find a grammar checker that's more accurate.
  • Latency - 90% of our requests complete in less than 1 second and 96% in less than 2 seconds.
  • Reliability - 99.99% uptime

Grammar Checking API Pricing Chart

Simplified Pricing Summary

The table above is taken directly from the RapidAPI signup page, but it can be a bit overwhelming or confusing at first glance. Here's a much simpler estimate of the pricing, which is based on number of characters in the text submitted.

Characters Submitted per Month Price per 1000 Characters
Less than 3 million characters/month $0.02
3 million to 12 million characters/month $0.015
12 million to 30 million characters/month $0.01
More than 30 million characters/month Contact us

Example Estimate: Price for 1,000 Submissions of ~100 Words Each

In English, there are roughly 5 characters per word, so the estimated number of characters is

1000 requests x 100 words/request x 5 characters/word = 500,000 characters
500,000 characters x ($0.02 / 1000 characters) = $10

So, the estimated cost for 1000 requests of 100 words each is $10.

One Size Fits All?

We believe our standard service described above is the perfect mix of accuracy, latency, and price. If you don't agree, then we can offer you a service that optimizes the metric YOU care about most. Pick one: accuracy, latency, or price. We can offer you a custom model that optimizes for any single metric of your choosing at the expense of the other two. For example, we can offer you a lower latency service by decreasing accuracy and/or increasing price. Similarly, if you want a lower price, we can do so with a service that is less accurate and/or lower latency. Let's talk.