Summary. In conclusion, there is one major difference that separates these two ideas. As stated previously, a shareholders agreement is with the company and its shareholders. Moreover, a company is a separate legal entity, unlike the partners in a partnership agreement.
To be considered a partnership, the business needs at least two owners. Both S-corps and C-corps can have just one owner. A C-corp can have an unlimited number of owners, while an S-corp can have no more than 100 shareholders.
A joint venture involves two or more persons or entities joining together in particular project, whereas in a partnership, it is individuals who join together for a combined business.