Plumb · House #23,661

What it is

Calls itself “AI English coach”.

• Calls itself: AI English coach

“AI English coach”

Where it puts itself

Positions itself as an alternative to Grammarly. Rules out “subscription”.

• Alternative to: Grammarly
• Says it will not: subscription

“Plumb never rewrites you. You fix it, so it sticks.”

“A free, private alternative to cloud grammar tools such as Grammarly”

What it costs

Has a free plan. No monthly or yearly plan. No one-time option.

• One-time: no
• Monthly: no
• Yearly: no
• Free plan: yes

“There is no subscription, no trial, no ads and no account.”

“Free.”

Who it sells to

Sells to consumers. Made for non-native speakers. In English.

• Sells to: consumers
• Made for: non-native speakers
• Languages: English

“Free to download and use”

“…non-native speakers”

How it runs

A desktop app for macOS. Runs locally and works offline. Distributed through the GitHub. No API. Open source. AI is the core of the product. Built with Vercel.

• Kind: desktop
• Runs on: macOS
• Runs where: on the device, offline
• Distributed via: GitHub
• API: no
• Open source: yes
• AI role: core to the product
• Built with: Vercel

“Plumb's AI runs on your computer.”

“…macOS 14+”

What it works with

Names Grammarly, Laya and 2 more on its pages.

• Names: Grammarly · Laya · Mac · +1

“A free, private alternative to cloud grammar tools such as Grammarly, for notes and drafts.”

“Plumb fine-tunes Laya (https://github.com/NandhaKishorM/laya), an open-source model”

What it offers as proof

Live, no waitlist. Try it without signing up.

• Trial asks for: nothing

“No account.”

“No account, no tracking Nothing to sign up for.”