How good are DJs for weddings versus a Spotify playlist?

It's not that black and white, it really depends on what kind of party you want. A live DJ adapts to the vibe of the crowd, reads if something isn't working and changes on the fly, plus they throw in transitions and effects that a playlist can't do; but if your circle is more low-key or you prefer really specific music that you've picked out, Spotify + sound system is way cheaper and works perfectly fine. How many guests are you expecting roughly, and how much do they care about having someone controlling the music or do you prefer something more laid-back?

How many people are you expecting and what's your rough budget? The thing is, a live DJ really makes a difference if you want the party to have flow - they read the room, keep the energy up, avoid awkward silences. A Spotify playlist works if your crowd is chill and doesn't need that much "show," but you risk it feeling robotic, weird gaps between songs, or people ending up asking for covers that aren't on your list. If you can swing even a DJ for half the day (entrance and exit), it's probably worth more than spending it on decent sound equipment, because the sound's gonna be managed better anyway.

The thing isn't really DJ versus Spotify, but more about how much control you want over what's playing. With Spotify you've got the obvious advantage: songs you love, no middleman, and you save a fair bit of money. But there's a detail people forget: someone has to babysit the app all night, skipping songs, turning the volume up when it drops, avoiding awkward silences. That falls on you or a friend, and trust me, it's more work than it seems when you want to actually enjoy the party.

A live DJ costs more, but the thing is you're not paying attention to anything. The guy reads if the crowd's getting bored, speeds things up or slows down based on what he sees, and the transitions between tracks are smooth. Plus, a good DJ knows how to throw in songs you weren't expecting but that work, something a preset playlist can't do. That said, if your budget's tight, you can try a middle ground: hire a DJ just for the key moments (the entrance, cake cutting, the last dances) and then let Spotify handle the rest. There are DJs who charge a reduced rate for "partial service" and it's way more affordable than a full set.

How many hours are you going to spend glued to your phone switching songs instead of actually enjoying the party? I tried something similar at a get-together with friends a while back - I put together a playlist, got a decent speaker - and I ended up the whole night skipping tracks because people were asking for stuff, because a song felt slow at that moment, because we needed to skip certain tracks. I didn't even dance in the end. If your budget is tight, a DJ is expensive, yeah, but if you can find someone young who's just starting out they charge way less than the established places and they still know how to do the job. The other realistic option is Spotify with basic sound equipment but have someone you trust handle the music - they don't even have to be a pro, just someone who's having a good time at the party but is paying attention to changing up the vibe.