As i have volunteered in an NGO while working full time in an mnc i can tell you the major difference between the two - 

Corporate Social Responsibility (CSR) refers to a company's commitment to operate in an economically, socially, and environmentally sustainable manner. This can include a wide range of activities, such as reducing carbon emissions, supporting local communities, and promoting ethical labor practices. CSR is typically voluntary and is not legally required, although some countries have laws or regulations that encourage or require certain types of CSR activities.

 Non-Governmental Organizations (NGOs) are independent, non-profit organizations that work to address social and environmental issues. They are typically not affiliated with any government and rely on funding from a variety of sources, including donations, grants, and membership fees. NGOs can take many forms, such as advocacy groups, charities, and development organizations. They can work on a wide range of issues, from human rights ,meal donation , donation for education and environmental protection to poverty reduction and disaster relief.

 One key difference between CSR and NGOs is that CSR is typically focused on the actions of a specific company, while NGOs are focused on addressing social and environmental issues more broadly. CSR is also often driven by a company's desire to improve its reputation or to comply with laws or regulations, while NGOs are typically motivated by a desire to make a positive impact on society.

 Another key difference is that CSR is voluntary and not legally required, while NGOs are independent organizations that are not affiliated with any government and rely on funding from a variety of sources.

 In terms of their impact, CSR can have a positive impact on society and the environment, but it is often limited to the specific actions of the company involved. NGOs, on the other hand, can have a broader impact on society and the environment, and can also help to hold companies and governments accountable for their actions.

 In summary, CSR is a voluntary commitment by companies to operate in a sustainable manner, while NGOs are independent organizations that work to address social and environmental issues. The two are distinct but can complement each other. CSR can be a way for companies to contribute to the work of NGO volunteer  and also for NGOs to hold companies accountable for their actions.