maybe neither!!

Realtor.com is managed by Move.com owned by News Corp but has limits put on what it can do by NAR requiring a Board of Directors approval for changes. I find Zillow is best at rentals. More time is spent per view on realtor.com, and the numbers are rising quickly. In some important metrics it is better than Zillow.

I do not pay for any of the .com leads or advertising, but I allow my listings to go to Realtor.com and I have free profiles on most sites the public uses frequently. Realtor.com & Zillow seem to be the only 2 I see advertise on TV, so I support for Realtor.com as a member of NAR.

Realtor.com 

To us, the choice is easy....we don't believe that Zillow is a credible source and choose not to have anything to do with that platform since even trying to correct their many errors brings no results.

Neither, I don't buy leads.

Neither, not the best way to spend money

Both for marketing.

Zillow far outpreforms Realtor.com. I've used Zillow for years and it has consistently sent me good leads that have turned into a lot of closings. I found that a lot of the Realtor.com leads were low quality and not a one ever went to closing,

Neither one gets my money, but they both have my listings.

Neither, but realtor is probably a little better.

R.c is not operated by NAR, please read up on it. I currently like the R.c new website they have launched recently.

Z has taken to advertising their CEO's new book on the main page. 

I do not pay for either.

Neither. Of the two, I would recommend Realtor.com as the more accurate.

We get a weekly list hub report on our listing and Ziillow seems to be at least 5 to 1 over realtor as far as listing exposure and clicks

Keep in mind that there are typically 4x the number of real estate leads sold per year than there are closings!  Unless you have a great system in place to incubate online buyer leads, you probably should invest elsewhere.

I don't pay for either, but have a free profile page on Realtor®.com.  If you got a full wallet and want to see it empty quickly, go right ahead.  Not from experience, but just from the huge amount of negative comments I've heard here on AR and other sites.

Neither - I abhor Z with a passion

More like neither. I would rather promote myself than Z. 

Well, both of them will give you exposure - and to best of my knowledge, both of them are expensive.

Realtor.com is much more accurate but neither are owned by NAR

I only use the Professioal site!!!!!!!!!!!!!!!!!!!!!!!!!

NEITHER!

Neither...

Neither!

Maybe neither one!

Neither. Both are of no value to me. Neither are credible to me. 

Neither. I have used Trulia and Realtor.com before but not now.

   NAR does not own  Realtor.com . 

   They have some input into the site.  See Joe Pryor 's answer on this page.

I have used realtor; never Zillow.

Just to be clear: Realtor.com is owned by Move, which is owned by a large media conglomerate.  It is operated on behalf of NAR.

I won't pay for either service, I'd rather spend the money on things that will actually benefit me.  I use their free services to my full advantage.

you have a misunderstanding.  NAR sold R.com and no longer has control. And I use neither.  I feel it's much wiser to do ppc and bring prople directly to my site with IDX than to be competing with others for the same leads.

Neither. Too costly for me. I rather spend my resources on postcards.

We pay for enhanced listings on Realtor.com, but that's it.

neither....

I have little or no use for zillow.

Neither.

Realtor.com. I do make sure my listings are on Zillow, and are correct but no money spent

My listings get syndicated to both but I don't and won't "pay" for extra marketing on either of them. And NAR operates Realtor.org, Realtor.com is not an NAR controlled or operated site. "Move" owns Realtor.com.

https://en.wikipedia.org/wiki/Move_(company)

Big bucks involved so I suggest you search on AR on pro and cons.  Next RESOURCES must have 50 experience blogs posted from the past.