Yes, there are other online grocery store options from which you can shop in Seattle, WA.
Thousands of fresh, frozen and shelf-stable grocery items from farm-fresh produce and meat, to milk and eggs to ice cream are all accessible in a short span of time. These companies partner with the major grocery providers and at the same time work on popularizing its brand name.
There are several other grocery stores where you can indulge in online shopping. These are Fresh Direct, Simon Delivers, PinkDot, etc. You can learn more about them by visiting on the webpage:
http://www.freshdirect.com/about/index.jsp;jsessionid=NzQ3K6TCCvJ5Nz4MTbcFfrJhXqwTqPTJCxSgVDvPBQsGVTTM2Gyn!1167755419!1555961560?siteAccessPage=aboutus&successPage=/index.jsp
Fresh Direct is one of the closest online grocery stores into existence whose model is being followed by Amazon most closely.
Schwans has also recently allowed its customers buy grocery items online. They are however not in the market of selling and delivering fresh foods, rather they concentrate on the frozen and non-perishable grocery items. There are yet other online grocery companies which include some Safeway stores, Costco/Sams Club, Peapod and Tesco.