It's important to make informed decisions when it comes to your music career.
If you're deciding between CD Baby, TuneCore, and ReverbNation for your distribution needs, the chart below should give you a good sense of the features and prices of each.

CD Baby vs. TuneCore vs. ReverbNation
	CD Baby	TuneCore	ReverbNation
Sign up fee	$49	$49.99 (or 4.99 month)	$34.95 $59.95 Pro
Annual fee	N/A	$49.99 (59.88 if you pay monthly)	$34.95 $59.95 Pro
Commission on Digital Sales	9%	0%	0%
Number of digital retail partners (iTunes, Amazon, etc.)	60	27	34 40 Pro
Full-service CD Sales	Yes	No	Yes
Commission on Physical Sales	$4	N/A	$5.49
CD & Vinyl Distribution	Yes (to over 2500 retail stores)	No	No
Credit Card Swiper for live gig sales	Yes ($30 + S&H)	No	No
Sell Music on Facebook	Yes Including CDs and Vinyl	No	Yes

In a nutshell: TuneCore and ReverbNation don't take a cut of your sales but they do charge annual fees.
CD Baby takes 9% cut of digital sales, and has no annual fees.

How Much do I Need to Sell to Break Even?

With CD Baby you must sell $77.22 total (78 downloads) to cover your one-time submission fee.

With TuneCore, you have to sell at least $70.29 every year (71 downloads) to cover your fees.

With ReverbNation you have to sell $85.14 every year (86 downloads) to cover your fees.
(Numbers are calculated based on 70 cent iTunes payout per single song download.
CD Baby keeps 9% which makes their payout 64 cents per download)