The top 10 most innovative companies this year (2021) can vary depending on different sources and rankings. Here is a list of companies frequently highlighted for their innovation:

1. Apple: Known for its groundbreaking products and services in the technology sector.
2. Tesla: Pioneering electric vehicles and pushing boundaries in autonomous driving.
3. Amazon: Continuously innovating in e-commerce, cloud computing, and consumer technology.
4. Microsoft: Advancements in cloud computing, artificial intelligence, and various software solutions.
5. Alphabet (Google): Constantly developing innovative technologies, including search, AI, and self-driving cars.
6. Samsung: Renowned for its innovation in consumer electronics, semiconductors, and mobile devices.
7. IBM: Leading the way in research and innovation across various sectors, particularly with AI and blockchain.
8. Netflix: Revolutionizing the entertainment industry with its streaming platform and original content.
9. SpaceX: Making significant advancements in space exploration, including reusable rocket technology.
10. Moderna: Developed one of the leading COVID-19 vaccines using mRNA technology, showcasing innovation in the healthcare industry.

Please note that this is a subjective list and other companies may also be considered highly innovative depending on the context and criteria used for evaluation.