Pixmac resell images from various microstocksites including depositphotos and yaymicro along with a 'premium' macrostock priced collection from image source, this in addition to their own collection from contributing (microstock) photographers.

Pixmac currently offers more than 11.5 million images to buyers, most of which are sourced from other microstock sites via reseller agreements. A press release in May 2011 stated that they also have 750,000 of their own images uploaded directly to the site. The site describes itself as a food court of stock images.

In the past pixmac has received some quite significant criticism from photographers, when launched the site was full of shocking spelling errors (who am I to talk!), including those in the terms and conditions, e.g. "in no case shell be liable for any demages"; at the time this and the fact that photographers were confused when they saw their own fotolia images being resold without explanation lead to a general feeling that pixmac was 'yet another start-up microstock'. Pixmac have worked hard to rid themselves of that label with photographers, but it's important to realise that new buyers don't come with these preconceptions and will buy if they find an image they like and can obtain it conveniently. Pixmac were previously resellers of fotolia and dreamstime images, however these two agencies dropped pixmac from their reseller lists or did not renew contracts. Shortly after allegations (which pixmac strongly denied) of irregularities in sales tracking were made.

Conclusion
My initial review of pixmac (nov 08) was not entirely favorable. I uploaded images only to test the waters, there was a general feeling in the microstock contributor community "why upload here if you are already on fotolia?".

Almost three years later I still don't have a lot of concrete information on direct sales from pixmac, but there has been some improvement. Direct sales on pixmac are still very low for me hence the low review score. I'm continuing to upload and see what happens, and will update this as I go.

What makes pixmac different to other image resellers
Continued innovation like improved search and streamlined buying process. Most agencies have not caused confusion to microstock photographers as they only resell images and don't include features for you to upload your own work in tandem; to reiterate what I wrote above, buyers won't be in the least be interested in the recent (somewhat checkered) history of photographer opinions, they buy images they want if they find them at a price they are willing to pay.

This is a great place for image buyers. Not perhaps so good for selling images, but pixmac is growing with an active market presence so keep watching.

More details on the pixmac website