If you're a small startup, your developers could probably be spending their time working on their own ideas just as easily as they chose to work for you. They're probably not going to steal your IP, and if they wanted to try, not being able to take the computer they work on home wouldn't stop them... your code base is probably small enough they could recreate it from scratch now they know how it works. In addition, if your devs find their work so interesting they'll take it home and work in their limited discretionary time, that extra work could save your startup. It'll be the kind of work done by highly engaged smart people who are working in the one place they have complete control over and have made completely comfortable. And you're getting this for free. Your developers are not six-year-olds. They are unlikely to damage your equipment or do something like get drunk and screw up your codebase (besides, you're using version control, right? ...Right?). And if you fear they are, you're either hiring the wrong people or you're too suspicious because you don't totally understand or respect them. Hire people you trust and respect, and then have a little faith in their judgment.

This Quora answer is a funny example: https://www.quora.com/What-are-some-cute-things-beginner-programmers-do/answer/Eugene-Yarovoi?srid=MMZ8

This is hilarious! Similar to the measure of code quality, the measure of how epic an esoteric programming language is can be measured in "Why???"s per minute.

This one probably sounds phony at first, but there's a web site called brain.fm that has tracks for focus. It claims to alter the frequency of your brain waves or something; I don't know if that's legit. I do know that whatever it's doing, it works. It's paid, at like seven bucks a month, but worth it. I used to use music, which is okay and if you've got the right music (one that improves your mood while not being distracting), it can help. Audiobooks are too distracting for me to listen while working--they keep the part of my brain that's focused on language busy, and it shuts everything else out. Silence is sometimes golden but is also easy to walk away from. The site has built-in timers for certain intervals, but you can also set it to run until you stop it. I usually get three really productive hours in before I just have to walk away from the code for a while because it's sucking out my brain. The site also has tracks for relaxation, which also work; and sleep, which I haven't really used. I'm not affiliated, I just think this site is worth it.