It doesn’t come installed, but there is a Spotify Skill that lets you stream music and playlists from your existing library.
Enable the skill through the Alexa app on your phone or Amazon.com. Then, tell Alexa to use Spotify as your default music provider. Open the Alexa app and select Settings. Tap on Music and Media. Finally, tap the Choose Default Music Service button.
Read: 31 Spotify Tips & Tricks
You need a paid Spotify subscription for streaming on Echo devices to work. A subscription costs $9.99 a month for just one user.