Best company to consolidate my student loans?

If you have private loans you can consolidate them, too (unlike what the first answerer said). This is one area where you can shop around for rates.

By law, lenders are required to use the same interest rate formula for Consolidation Loans. However, many lenders offer interest-rate reductions for paying on time or via direct debit. It is important to read the fine print and understand how you become qualified for or disqualified for a lender’s borrower benefits programs. Beyond savings, borrowers should consider customer service, flexible repayment options, online account access and applications, reputation and industry experience when selecting a lender. Sallie Mae offers a lot of good information on consolidation on its site, including an FAQ and a calculator that will tell you what your payments will be. http://www.salliemae.com/after_graduation/manage_your_loans/consolidate_student_loans/student_loan_consolidation.htm