Ad-blocking software maker Eyeo has announced it will start allowing publishers to buy "non-intrusive ads" that will appear to users of its Adblock Plus software.

Eyeo and ad-tech company ComboTag will let publishers choose from "a marketplace of pre-whitelisted ads" that meet the criteria of its "Acceptable Ads Platform".

The ads will be visible by users who have elected to "allow non-intrusive ads to support their favorite websites", the company said in a press release.

"The Acceptable Ads Platform helps publishers who want to show an alternative, non-intrusive ad experience to users with ad blockers by providing them with a tool that lets them implement Acceptable Ads themselves," said Till Faida, co-founder of Adblock Plus.

The company announced its Acceptable Ads Platform in 2011 and it says that 90 percent of its 100 million users allow respectful ads to appear on their screens.