There are some really bad areas of Oakland and of SF, and they're fairly near the popular-for-startups areas (the Mission, Downtown Oakland and areas adjacent). Pac Heights and Oakland Hills/Piedmont are both quite safe, but are not really startup areas.
The biggest problem with Downtown Oakland is that it empties out at 5pm. The areas with more activity are either lacking in office space, or are more dangerous (particularly if you don't drive). And the other problem is that Oakland is quite spread out, so things are in different neighborhoods.
The average (mean, per capita) crime in Oakland is higher than in SF, but in both cities, there are a few pockets of extreme violent crime, and fairly widespread property and nuisance crime over a large area. Neither SF nor Oakland is a particularly well governed city.
<BIGconspiracyhat> Any attempts to show Oakland, Africa or African-americans in any kind of positive light or as victims will always, _ALWAYS_, get troll'ish/meta/hyper-pedantic comments that derail the main topic and/or meaningful discourse of the subject at hand, completely blowing up the comment threads. It works well on places like HN because almost everyone here likes to debate & discuss. But their arguments will become so spacious that you'll need 5 screen-lengths to debate with them and thus ruining the comments for anyone else who actually wanted to talk about the article. </BIGconspiracyhat>
Please let's ignore these guys. We know they're wrong, no point debating with them. We'll never convince them and the comments will get bloated with arguments back-in-forth about crime stats, someone will eventually use the "R" word and then BOOM, all meaningful discussion nullified by 5+ pages of of debate about some non-significant detail. Example: https://news.ycombinator.com/item?id=6365495
NOTE: An idea for the comment section, a way for users to flag a thread as "superfluous". If it gets enough of these, the whole thread is moved off to a small link on the side labeled "Superfluous thread started by $USER" where clicking on it give you a little scrollable window to view it and easily dismiss it when you're satisfied the thread had no real value. Perhaps each user's profile even shows how many superfluous threads were credited to him/her.
If the original poster had moved his startup to Stockton, we would be having the same conversation.
This post is another example of a long history of gentrification, which also has a racial component. Race is absolutely on-topic here.
That doesn't mean I expect said discussion to be productive.
OK yeah I got mugged once. But nonviolently, LOL. Only cost me $20. This was near Downtown.
Most of San Francisco is safe, with just one or two neighborhoods being dodgy. Most of Oakland is unsafe, with just one or two neighborhoods being safe.
Oakland is one of the most dangerous cities in the USA. Just because you live there and haven't been gunned down yet, doesn't mean it's not happening to many other people.
It's literally your life, so do your own research and don't listen to me or anybody else.