TLDR: They're two different agencies that have different cabailities and responsibilities. Other than logistics cost NASA's rockets have much higher payloads (

TLDR: They're two different agencies that have different cabailities and responsibilities. Other than logistics cost NASA's rockets have much higher payloads (think 100 tons vs 10 tons), number of rockets available, number of satellites launched into space (but I think ISRO technically has a better success rate), deep space missions and research(ISRO recently sent its first MARS rover), space stations, manned missions, NASA is also involved in aeronautics, and robots/rovers. Source: https://www.quora.com/What-is-the-difference-between-NASA-and-ISRO-in-terms-of-advanced-technology-and-science https://www.quora.com/What-is-the-difference-between-NASA-an...