Foster spent two years on a break from the national team but was persuaded to re-join the Three Lions squad by former club boss Roy Hodgson.
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"It's great to see Ben. He is a consistent performer, someone I get on well with, when we train and to play against," Hart told reporters.
"It's good to have keepers like that around. There are three top quality keepers here plus Jack Butland and Jon Ruddy, and everywhere you look there is good talent.
"Is Foster good enough to push me? Yes, but I've felt that every time I've come away with England.
"My job when I was first involved was to really push hard. We all train like we are going to play and and push each other and it's really good.
"If anyone of the three played, then we'd be in a strong position."
But with so much added competition, Hart knows he has to fight to keep his starting spot and the 25-year-old is eager to go to Brazil in 2014 as England’s first-choice.
"I'm in that privileged spot at the moment," Hart continued. "I didn't dream of this spot because I didn't think it would happen.
"I'm doing what I've always wanted to do, I love it, I'll keep working and training hard if there are no keepers or 1,000 keepers.
"That No.1 spot is one I want to keep and last summer [Euro 2012] was a real high point in my career."