kitio.aiAdded Nov 5, 2026
Perfect Tense
FreemiumSpelling and grammar correction API and JavaScript library
What is Perfect Tense?
Perfect Tense adds AI-backed spelling and grammar correction to websites, platforms and internal systems through an API or an embeddable JavaScript library. It suits product teams and publishers who want errors flagged or fixed automatically inside their own software.
The API lets you decide when text is sent, choose between response types, display mistakes to users, auto-correct specific errors and collect aggregate data on content quality. It can run fully automated corrections with no human in the loop.
The JavaScript library underlines mistakes as people type and can be dropped into any text area with a short snippet, with support for rich text and WYSIWYG editors. Usage is counted in instances, meaning each time a Perfect Tense-enabled text area loads, and there is a HIPAA-focused medical option.
Features
- Grammar and spelling API
- Embeddable JavaScript library
- Automatic corrections
- Content quality data
- Rich text editor support
Tags
Releases
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Organization
Perfect Tense
🇺🇸 United States
Listed by kitio.ai · unverified owner
Pricing
- Pricing model
- Freemium
- Paid options from
- Not listed
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Pros and cons
Pros
- Two ways to integrate
- Can fix errors with no human effort
- Free sign-up without a card
Cons
- Built for developers, not end users
- Usage billed per text area load
- Language support not stated
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Reviews
Q&A
What is Perfect Tense?
Perfect Tense adds AI-backed spelling and grammar correction to websites, platforms and internal systems through an API or an embeddable JavaScript library. It suits product teams and publishers who want errors flagged or fixed automatically inside their own software.
What counts as an instance in Perfect Tense?
An instance is each time a text area loads with Perfect Tense enabled. Extra instances above the plan limit are billed per thousand.
Does Perfect Tense work with WYSIWYG editors?
Yes. Its JavaScript library is designed to work with rich text and WYSIWYG editors as well as plain text areas.
How much does Perfect Tense cost?
Perfect Tense is freemium.
Is there a free version of Perfect Tense?
Yes. Perfect Tense has a free plan, and paid plans add more usage and features.
What are the main features of Perfect Tense?
Grammar and spelling API, Embeddable JavaScript library, Automatic corrections, Content quality data, Rich text editor support.
Who makes Perfect Tense?
Perfect Tense is made by Perfect Tense.
What are the best alternatives to Perfect Tense?
Popular alternatives include Sapling, Grammarly, DeepL.