Perfect Tense

AI-powered grammar checker with an API

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Perfect Tense is an intelligent grammar correction tool that understands the context and meaning of text to accurately identify and fix errors. With a powerful API, Perfect Tense lets you easily add grammar correction to your product or workflow.


 +5 reviews


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cardineMaker@cardine18 · Cortx
Hi hunters! I'm Alex, founder of Perfect Tense. Perfect Tense started out as a solution to one of our own problems. We do a lot of natural language processing work and we were having issues with poor quality input data. So we set out to solve this problem and spent the last 12 months developing a smart spelling and grammar checker that can both detect and correct mistakes. We have an online web interface, but we think the best use case for this tool is our API. This allows you to easily integrate automated spelling and grammar correction into your own products or add it to your workflow. If you are a developer, we would love to talk to you and see if we can help make your product or service better with better grammar. And if you are a user, we would love to hear what integrations you would find most useful. And of course, I would be happy to answer any other questions, so feel free to ask me anything!
Tarik Kurspahic@tariktech · EVP Technology | CTO TeamData
@cardine18 - Congrats on your product launch. Looks nice.
Daniel KempePro@danielkempe · CEO @
ooo, i'm interested in using the API in my tool. May need more than 300 calls per day mind...
cardineMaker@cardine18 · Cortx
@danielkempe Awesome - we can definitely accommodate more than 300 calls! Just enter your email here ( and we can set you up with a free account to play around with and talk a bit more about how many calls you'd want for your tool.
Preetesh Jain@preetesh_jain · ⚡ Product and Tech at
Yes I think any commercial application would need 300+ API calls. @cardine You might need to update the pricing accordingly.
cardineMaker@cardine18 · Cortx
@preetesh_jain I agree - 300+ API calls is not nearly enough for most commercial applications. Right now we have a "contact us" for anything more than that since we are a new product and we want to make sure we fully understand the needs and use cases of any bigger commercial applications. Plus you get the red carpet treatment from us :) So with that being said, I've sent you a message about your specific use case!
Preetesh Jain@preetesh_jain · ⚡ Product and Tech at
@cardine18 Awesome! Will check it out.
Mick@mickc79 · Founder of SongBox.Rocks
Hi, this looks cool and useful, but can you please explain the “AI” element? How much more intelligence is required in a spelling / grammar checker than what has been standard in many word processing apps and content management systems since many many years before that “AI” bandwagon hit town?
cardineMaker@cardine18 · Cortx
@mickc79 That's very fair - artificial intelligence has become a bit of a buzzword, and we often find ourselves cringing when we see a product using AI to describe basic business logic or a simple classifier. A big differentiator for us (especially with our API) is the ability to automatically make corrections instead of just listing mistakes and potential fixes. A lot of our attention and focus is spent in this area, with a big focus on our internally developed language model. More broadly, we build, train, and test our own deep learning models. Although Perfect Tense is not a single all-encompassing model (yet!), we are doing quite a bit under the hood to be able to automatically fix grammar mistakes and give a final output that has no false positives. This is not possible by exclusively looking at Levenshtein distance or parse trees. With that being said, even our dependency parsing involves a bit of artificial intelligence beyond what is being used by word processing apps. Almost all dependency parsers are trained exclusively on good quality grammar and break down when there are grammar mistakes. So we have to do a lot of that development and training internally. Thank you for the comment, and I hope that helps answer your question. If you'd like to ask any follow-up questions about our AI in more detail, drop us a line ( and I'd love to talk with you about more!
Mick@mickc79 · Founder of SongBox.Rocks
@cardine18 Thanks for that! Sounds good!
vijay bharadwaj@vijaystweets
Looks good. All the best
Rudy Lee@rlvl · Creator of Kydy, Co-Founder of VREX LAB
Looks good!