Simperium is another competitor (and a YC alum, as was AppJet). As everyone else replying to you has noted, these guys have grander ambitions. So does Simperiu

Simperium is another competitor (and a YC alum, as was AppJet). As everyone else replying to you has noted, these guys have grander ambitions. So does Simperium — they aren’t just doing Simplenote (see http://simperium.com/ http://simperium.com/). (Full disclosure: I contracted with them in the past)