MetLife’s new logo has some seeing double.

Diffen, a Wikipedia-like Web site that makes comparisons between issues and products, is accusing the largest US insurance company of ripping it off.

MetLife dumped Snoopy and the rest of the Peanuts-cartoon gang last month after 31 years in a broad company rebranding. Its new corporate logo includes black and green wedges that make an “M” shape.

Diffen’s logo is similar—except the colors are reversed, and one wedge is a bit larger than the other. The two companies also use different fonts.

“The whole reason people come to us is because we are unbiased,” Nick Jasuja, Diffen’s founder, told The Post. “I don’t want to seem like we are sponsored by a corporate entity.”

Diffen, which has been using its logo for three years, lets readers compare, say, Hillary Clinton’s policies to Donald Trump’s.

The site has about 4 million unique readers a month, Jasuja said.