Try https://socialchamp.io I found it y'day on PH and using it right now. It's free plan is sufficient for a startup.

You can use Hootsuite. It's a nice tool and gives you the right analytics.

Missinglettr

I found Buffer's free plan to suit me really well. Give Feedhive a shot as I've been hearing only good things about it :)

Publer! It's a good product, got a lifetime deal for it.

Yea, I also find Buffers free plan to suit me. But when it's time for me to level up with threads I'll probably try something else. Probably: https://tweetboard.io

on https://turnkeystaffing.com we used Loomly

FeedHive is a great option, and they develop features at a rapid speed, it's amazing!

I'm a big fan of socialbee.io

SocialChamp.io

You are aware of the fact that, if you use a scheduler, you are missing the "social" part of "social media", right?

Check out Publer

Software development services companies https://thinkpalm.com/uk/ usually use Hootsuite

Social Champ, User friendly and have every feature possible