Judaism teaches that the righteous of ALL faiths will 'have a share in the world to come'. It doesn't matter which faith a person follows: if they behave with kindness and integrity towards their fellow men, they will reach 'gan eden' or the 'garden of eden'. In Judaism, our actions are rather more important than our beliefs: it's what we DO to make this a better world that counts.
Please note that the Christian concept of heaven doesn't exist in Judaism.