Alternatives to AutoMapper [closed]

EmitMapper, http://emitmapper.codeplex.com/

ValueInjecter https://github.com/omuleanu/ValueInjecter

BLToolkit https://github.com/igor-tkachev/bltoolkit

And my homework development OoMapper https://github.com/hazzik/OoMapper

Old question, but take a look at Mapster. It's a lot faster than AutoMapper (5-10X in the scenarios I've used it in) if performance is critical and supports most AutoMapper scenarios. Always remember to perf test as results vary by scenario.
We've dropped a new 3.x version that works for .Net 4.0/4.5/Core, supports several new features, and has big perf improvements.

http://www.nuget.org/packages/Mapster/

https://github.com/eswann/Mapster

Disclosure...it's one of my projects that was created for a high load service where AutoMapper started showing up as one of our bottlenecks.

I went through a similar process recently trying to find a mapper that really covers all my scenarios as well. I've found ValueInjecter the best out of the automapper, emitmapper, and a few others on codeplex.

I choose ValueInjector because it's the most flexible of them all. I had a requirement to map from entity to viewmodel, and viewmodel back to entity, deep cloning where you have customer -> projects -> project, recursive situations like customer <-> project, and add/update/delete of children collections.

Out of the box ValueInjector doesn't support this, but it's framework is extensible enough to support this easily. You can see my extension point in this convention I posted on their discussion forum...

http://valueinjecter.codeplex.com/discussions/274484

This is an old question, but there's now also https://github.com/agileobjects/AgileMapper