A long strangle costs less than a straddle because both options are out-of-the-money, but the stock must move further before it profits. A short strangle collects less premium than a short straddle but has a wider profit zone.
Short strangles are a common premium-selling strategy and the undefined-risk cousin of the iron-condor.
Example: stock at $100. Buy the $110 call for $1.50 and the $90 put for $1.50. Cost $3. Breakevens are $113 and $87.
Related: straddle, iron-condor, out-of-the-money, implied-volatility