Tank mates

The answer to this question is yes, however it is limited to species only.  

You can house axolotls together but there are some things you need to know before doing this. 

Note: We do recommend that if you are purchasing two juvenile axolotls you separate them once they turn 6 months of age.  Axolotls become sexually mature between 6-18 months so you should be ready to keep them separated until you are sure they are the same gender.

• They have to be the same gender.  Why?  Because males and females will breed once sexually mature.  They do not know when to stop breeding, females should not be bred more than twice a year.  It can lower the females immune system and she could become very ill and it could result in death.  For this reason we strongly encourage you to start off with just one juvenile axolotl until you know it's gender, this can become obvious between 6-18 months of age.  At that time you can then purchase a second gendered adult axolotl of the same sex. 
• Minimum requirements need to be met.  What does that mean? Ideally you want 20 gallons per axolotl, but you can get by with 20 gallons for one and 10 more for each additional axolotl.  
• Ensure that they are well fed, Why is this important?  If they are hungry they will nip each others limbs thinking it is food. 
• Provide ample hiding places.  Axolotls like to hide, it is important you provide them a hiding place for multiple axolotls for their comfort.  This could be hides or lots of plants, anywhere they can go and hide and relax. 
• Ensure proper filtration.  When housing multiple axolotls we like to add additional filtration to help with the added bio load. 
• NO SNAILS, FISH, PLECOS, ETC!!!!  Why?  It is just not a safe practice for several reasons. They can bring diseases into your tank and get your axolotls sick.  Your axolotls will eat anything they can vacuum into their mouths, they can become impacted.  These other species may also pick and eat at your axolotl.