Am I too old to join a startup?

You're 47, not 97. If the project is something you like,and the people are people you'd enjoy working with -- why the heck not?

if you have to make a decision whether you should leave a steady workplace for the risk of a startup, then you need to carefully weigh the pros and cons. Otherwise, just go for it.

In his book, The magic of thinking big, Mr. David J. Schwartz wrote, "Productive life of a human being starts at the age of 20 and ends at 80", c'mon, You have 33 years of your productive life in hands. You wont like to waste them doing something you don't like. I am 19, just completed my graduation, placed in 2 big named software companies, and am leaving both when everyone around me is saying that you should get a job to get some experience, and starting my own venture with zero experience. Just because I like to do thing for myself. I don't want to get paid to fulfill someone else's dreams when have my own. Go for it, if it makes you happy, its worth.

Ok .. like you I am 47, I have 3 startups under my belt and like you I am more of jack of all trades. The answer to your question is a big "it depends" but the probabilities lean towards not joining a startup. Why?

1. You have to consider the opportunity cost of a startup. As we know, a startup can turn into a windfall for those who join early which could lead to financial independence. At the age of 47, where retirement and possibly the cost of children's education has to be taken into account this could be a great thing.

However:

1. Startups are risky. Globally 90% fail outright (reference), and even of the 10% successful startups very few return much money to the founders or the employees. I would rate the chances of making significant money with a startup at between 1 in 50 to 1 in a 100, though these chances can be dramatically improved if you pay close attention to who the founders and funders are.

2. Startups require long hours. Perhaps you could sustain that in your twenties or thirties, but in your 40s and 50s, and especially if you have children, it will be hard to keep that level of commitment without burning out.

So at our later stage in life, the benefits of a startup and its chances for success must considerably outweigh its risks to be worth considering.

Whats your stability tolerance?

If you can't sit around unemployed till you find a job after this thing fails then no go. Especially if your family is riding on the risk. If you can find a replacement job in 2 weeks then there isn't to much risk, if you may not find a replacement then no go.

How passionate are you on what this company's doing? Whats your time investment?

Would you rather poor your time into building a company your passionate about or be with your family? Sure you might not have to work 80 hour weeks, but either way if your not passionate about what this company is doing why would you risk your livelihood and the ability to provide for your family on it?

Personally, I believe that age is just a number, and when knowledge comes in front of age, I'd rather opt for knowledge because we developers are merely just by the name, as we are constantly learning new things everyday.

So according to me, If i were you, I'd just Go for it :)

PS : it also depends on how the startups are being managed by the owners and how interactive , creative and how passionate they really are towards their organisation.

I think it more or less depends on your passion, age being second consideration. However, family plays a more important factor in this than age I guess. Since you have someone else to support, so you have to make sure that you have a financial fallback plan if the startup doesn't work out.

You can be too old culturally to do a startup, but I don't think your physical age really affects that. So long as you haven't stagnated as a coder, are eager to learn new things, and can get things done, there's no reason I to think a 47 year old would be a bad choice.

In fact, a 47 year old at the top of their game would be many many times better than a 21 year old at the top of their game.

I'm late to the game in answering this but I've been at a number of startups myself and am currently not a spring chicken.

I agree with much of what's already been said. The one comment I'd add is be confident in yourself, in what you bring to the company and go in with that positive attitude. Try to push out any concerns about age from your mind. Feel GREAT about the experience you bring. Feel great about your "just get it done" attitude. Don't look at "jack of all trades, master of none" as a negative, look at it as a positive! Your attitude and your passion is what's young or old not the age on your drivers license.

What will you loose. Consider this for each of the options. And don't let the fear or desire or your feelings of security decide for you. Decide with your brain. What could you loose in every way, that you had not yet loose? Consider this deeply. I will do the same.