How do their growth rates compare?

Willi AI Email Assistant has a month-over-month growth rate of —; Letty has -85.4%.

How does pricing compare?

Willi AI Email Assistant: Contact for Pricing. Free to install from the Chrome Web Store, with account registration at willi.ai required for full use. The vendor does not publish a fixed price on the listing; plan and licensing details are handled through sign-up, so treat this as contact/commercial terms rather than a published free tier. Letty: Freemium. Freemium. A Free plan offers 10 AI credits per month and up to 400,000 training characters. Premium is $9/month for 150 credits and 4M characters, and Platinum is $19/month for unlimited credits and 10M characters. Annual billing discounts are available, and credits reset each calendar month.

What are alternatives to Willi AI Email Assistant and Letty?

Other tools in related categories include Sider, Spark Mail, WriteMail.ai, Smart Assistant by Mailbutler, Friday: AI E-mail Writer.

Willi AI Email Assistant vs Letty — Traffic (0 vs 198), Pricing & Verdict

Open AI Tools

Willi AI Email Assistant vs Letty — Traffic (0 vs 198), Pricing & Verdict | Open AI Tools

Side-by-Side Traffic & Specification Matrix

Dimension / Metric	Willi AI Email Assistant	Letty
Official Domain	chromewebstore.google.com	useletty.com
Pricing Model	Contact for Pricing	Freemium
Monthly Visits	0 (0)	198 (198)
MoM Traffic Delta	0 (—)	-1.16K (-85.4%)
Primary Market & Share	🌐 Global (—)	🇮🇳 India (100%)
Direct Visits / mo	0	77
User Rating	4.2	3.8
Supported Platforms	Browser Extension	Website

Willi AI Email Assistant

Turn a few Korean words into native-sounding business emails in 12 languages

Korean input to full sentences

Type a few Korean keywords or a rough draft and the assistant expands them into a complete, grammatically correct email.

Multilingual drafting

Covers roughly 12 languages, including English, Japanese, Chinese, Spanish, French and German, so you can write to partners in their own language.

Context-aware phrasing

Instead of literal translation, it reads the context of your message and generates phrasing that sounds like a native speaker.

Time-saving workflow

Comedically fast turnaround is the selling point: the vendor advertises natural business writing in seconds from a few words of input.

Strengths & Pros

+Sold as producing native-sounding business emails in seconds from short input
+Supports roughly 12 languages, covering the main markets Korean exporters deal with
+Context-based generation reads better than literal machine translation
+Lightweight extension (approx. 157 KiB) that stays out of the way until you invoke it