There's a fairly new organic delivery service that originated in LA called Thrive Market. Haven't tried them yet but plan to.
They're supposed to be a cross between Costco and WF because its a membership-based and they sell only organic products. Also their prices are a lot lower than you'd expect.
Also, "for every paid membership, they match that by providing a membership to a low-income family who might not otherwise have access to wholesome convenient food. Additionally, they support GMO labeling, and are committed to sustainability by being carbon neutral and using recycled packaging".
Here's a recent review of their service:
http://gutsybynature.com/2015/02/22/review-of-thrive-market-is-it-worth-the-membership-cost/