I'm starting a new startup with a cofounder. Do I need to also create a shareholders agreement or is a company constitution enough?

In the US, terms and conditions do not override the law of the land. Depending on the exact situation, and intent, I would suspect that an entity could make the case for fraud, trademark infringement, theft, or copyright violation. The practice will likely get you blacklisted by any search engine of significances, undercutting whatever your objective was in the first place.

(I'm a small biz attorney who helps people with copyright, trademark, and other IP law, and I'm answering per U.S. law.) As soon as you take your idea and put it into a tangible format (write it down, create an infographic, record a video), then that writing/infographic/video is automatically protected by copyright law. You can record the copyright on it too, which makes it easier to protect and get damages from other people taking it. But the formula itself would be probably protected under trade secret law or patent law. Patent law obviously takes a bit more effort, because you have to apply for the patent and get your application examined by the USPTO, which takes years and $$$. Keeping it protected under trade secret law means you have to make an effort to keep it secret (which may not work if you are disclosing it as part of your marketing efforts), such as keeping it confidential and requiring NDAs. As someone else said, the other terms you use might be protected under trademark law. If a member of the public would use those terms to link your products/services with the source of the product/service (aka, your company), then they could be trademark-able. There are some state law protections for trademarks, and you can also file to register the trademark with the USPTO and get more protection. Hope that gets your started!

The HKG company has the same commercial law set of UK, that said, between the two it would be safer using an NDA fitting the latter.

Your first point of reference should be experience. The most effective way to create your ToS is to consult with a lawyer who specializes in your industry. This also hold true for your that and any business legal document. It’s true that you can find different online services and templates to assist you, but the truth is that these documents could very well be null and void. Your business is specific and unique and your ToS should be the same way. I advise against copying your ToS or using one of the “easy to use” sites as they will almost certainly fail to include or capture everything. Read more: https://lawtrades.com/blog/protect-website-liability/ At www.lawtrades.com, we have plenty of experienced Terms of Service and Privacy policy lawyers who will complete it for you on-demand. I have seen PP and TOS prepared routinely for $599 or less, and these documents essentially serve as a “blueprint” for your business. (Full disclosure: I'm the founder/CEO). In my opinion, copying your competitors legal documents will not work for you in the long run. The odds are high that the business had their documents customized, and by copying and pasting you are claiming that your business has the same features and services which is highly unlikely. Hope this helped address some of your concerns. When you're ready, you make your request completely free at www.lawtrades.com to get a better feel for the process. Feel free to mention "clarity" for a discount :)

I'll keep try to keep this answer brief, but there are several factors and nuances that can be discussed in more depth. Where you decide to incorporate partly depends on what your future goals are with your company. Companies that plan to seek venture capital or go public typically choose Delaware as the state of incorporation, and usually choose a C-Corp. Delaware has a very well developed body of law surrounding corporate governance and that provides comfort and more certainty to future VC investors. If you're not planning to seek VC money any time soon, an LLC is a smart decision because of the tax benefits it can provide to you as the owner. It sounds like you want to grow your company on your own without outside financing. If that's the case, I would recommend forming your LLC in California. Regarding California vs. Delaware, one benefit to forming your LLC in California is that you can avoid paying a registered agent fee which can cost anywhere from $100-200 a year. If you plan to seek venture capital down the road, you can reincorporate in Delaware.