KAI KeyboardAI vs ParagraphAI

Two fact sheets from our own research, side by side — pricing, platforms, API access and status re-checked by us rather than quoted from the vendors.

The short answer

Cheaper paid plan: KAI KeyboardAI — $4.99/mo vs $24.99/mo for ParagraphAI
Free plan: Both have one
Best fit: KAI KeyboardAI: Rewriting messages in place on iPhone · ParagraphAI: Heavy mobile emailers and messagers
Platforms: KAI KeyboardAI: iOS · ParagraphAI: Web, iOS, Android, Chrome extension
Trust score: About even — KAI KeyboardAI 83, ParagraphAI 87

From our own records as of each tool's last check. Anything we have not confirmed is left out rather than guessed. How we verify

KAI KeyboardAICustom iPhone keyboard that rewrites, replies and drafts with AI inside whatever app you are typing in.

ParagraphAIKeyboard-level writing help for phones, browser and email replies

Side by side

Fact	KAI KeyboardAI	ParagraphAI
Category	AI Writing Assistants	AI Writing Assistants
Pricing model	Freemium	Freemium
Starts at	$4.99/mo	$24.99/mo
Trust score	83 / 100	87 / 100
Platforms	iOS	Web, iOS, Android, Chrome extension
Company	Akshat Giri LLC	ParagraphAI Inc.
Launched	2023	2022
Last verified	Oct 15, 2026	Oct 16, 2026

What our research says

KAI KeyboardAI

A keyboard is the right shape for this problem — you rewrite the message where you are typing it instead of copying into a chat app and back. KAI does that, cheaply. The problem is age: the last update was November 2023, and an AI product frozen for that long is running on whatever model it shipped with.

Pros

Works system-wide as an iOS keyboard, in any app
Free to install with a one-off All Access unlock rather than a heavy subscription
Ships English, Russian and Ukrainian support
Named developer with a live App Store listing

Cons

No update since version 2.1 in November 2023
Billing period on the $4.99 and $39.99 purchases is not stated anywhere
Rated 18+, which blocks it for school-age users
Third-party keyboards need full access, meaning what you type can leave the device

ParagraphAI

The keyboard is the whole argument: if you write serious volume from a phone it beats copy-pasting into a chatbot. On desktop it is hard to justify $24.99 a month against Grammarly or a general LLM subscription that does more.

Pros

Native iOS and Android keyboard works inside any app, not just a web editor
40+ languages with per-user fluency settings
Free tier is workable for light use at five uses per action per day
Annual billing halves the effective rate to $12.49 a month

Cons

$24.99 on monthly billing sits above Grammarly's consumer tier for a narrower feature set
10,000-character input cap even on Pro, which rules out long documents
No developer API, and team controls only exist on the custom Enterprise plan
Marketing leans on unverifiable Fortune 500 adoption claims

Which one fits

Choose KAI KeyboardAI if you need

Rewriting messages in place on iPhone
Non-native English speakers drafting on mobile
People who want AI writing without a separate app

Choose ParagraphAI if you need

Heavy mobile emailers and messagers
Non-native English speakers wanting tone and formality control while typing
Sales and support reps replying from a phone between meetings