...Redfin is more of a DIY approach where you still use your own financing source, and Redfin provides their services on demand. (I don't know if this is accurate about Redfin and financing...any idea on whether or not this is accurate?)

Also, it appears (from their sites) that Homie caps your buyer's benefit at $5,000, while Redfin appears to give buyers a full 1% of the purchase price. (Thus, for homes over $500k, it seems like the benefit of Homie may be reduced.)