Smartparens is like Paredit but for any language, and supports all types of “pairs” (e.g., including HTML tags) and not only parentheses and brackets.
For non-Lisp languages, using Smartparens together with Symex is recommended! See Balancing Parentheses for more.
For Lisp, Symex already includes parenthesis balancing via Paredit, so using Smartparens in addition likely would not be useful. But if you still would prefer to, then you can disable Symex’s parenthesis balancing so that you can use whatever package you may already have configured for this purpose (e.g., either Smartparens or Paredit).
Please note: Symex relies on code being structurally valid, so if you choose to disable this, you must provide an alternative, either via Paredit or Smartparens or another similar package, so that the structural integrity of the code is always maintained.