Mark AI vs Undetectable AI

See how their public offers line up before you choose your own position. Prices stay in the currency, billing schedule, and charged unit each vendor publishes.

Mark AI

See full pricing history

EUR · US · source: www.markcopy.ai

Plan	Pricing	Charged by	Offer type
Team Highlighted	EUR 750 monthly €750/month	Flat · per month	Standalone · Fixed
Enterprise	Contact sales Custom pricing	Flat · per month	Standalone · Contact sales

Undetectable AI

See full pricing history

USD · US · source: undetectable.ai

Plan	Pricing	Charged by	Offer type
10K words/month — default	USD 9.99 monthly · USD 5 / month with annual commitment $5.00 /mo Charged annually $60.00	Usage · 10K words/month	Standalone · Fixed
20K words/month — default	USD 19 monthly · USD 9.5 / month with annual commitment $9.50 /mo Charged annually $114.00	Usage · 20K words/month	Standalone · Fixed
35K words/month — default	USD 31 monthly · USD 15.75 / month with annual commitment $15.75 /mo Charged annually $189.00	Usage · 35K words/month	Standalone · Fixed
50K words/month — default	USD 42.5 monthly · USD 21.25 / month with annual commitment $21.25 /mo	Usage · 50K words/month	Standalone · Fixed

What each plan includes

Feature names follow each vendor’s own pricing page, so verify the wording before treating them as exact equivalents.

Mark AI

Team

Plan card Users: Up to 5

Included
Plan card Brand-trained AI: 1

Included
Plan card Collaborative workspaces: 1

Included

Enterprise

Plan card 5+ users: Included
Plan card Custom content templates: Included
Plan card Dedicated customer success manager: Included

Undetectable AI

10K words/month — default

Highlights Passes AI detectors: Included
Highlights High quality, legible content: Included
Highlights Watermark and future proof: Included
Highlights Writing level matching: Included
Highlights API compatible: Included
Highlights Unlimited Human Auto Typer: Included
Highlights Unlimited AI Detecting: Included

20K words/month — default

Highlights Passes AI detectors: Included
Highlights High quality, legible content: Included
Highlights Watermark and future proof: Included
Highlights Writing level matching: Included
Highlights API compatible: Included
Highlights Unlimited Human Auto Typer: Included
Highlights Unlimited AI Detecting: Included

35K words/month — default

Highlights Passes AI detectors: Included
Highlights High quality, legible content: Included
Highlights Watermark and future proof: Included
Highlights Writing level matching: Included
Highlights API compatible: Included
Highlights Unlimited Human Auto Typer: Included
Highlights Unlimited AI Detecting: Included

50K words/month — default

Highlights Passes AI detectors: Included
Highlights High quality, legible content: Included
Highlights Watermark and future proof: Included
Highlights Writing level matching: Included
Highlights API compatible: Included
Highlights Unlimited Human Auto Typer: Included
Highlights Unlimited AI Detecting: Included

How their prices changed

Each dated row shows the public prices observed when that vendor’s pricing page changed.

Mark AI

August 27, 2026 Source
- Team: EUR 750 monthly
- Enterprise: Contact sales

Undetectable AI

August 27, 2026 Source
- 10K words/month — default: USD 9.99 monthly · USD 5 / month with annual commitment
- 20K words/month — default: USD 19 monthly · USD 9.5 / month with annual commitment
- 35K words/month — default: USD 31 monthly · USD 15.75 / month with annual commitment
- 50K words/month — default: USD 42.5 monthly · USD 21.25 / month with annual commitment