On the Ethereum platform, smart contract execution or a basic transaction needs costs in the form of Gas. Here's a comprehensive article on it. Read now.
Hedera is a public network & governing body for creating & deploying DApps, and it is entirely open source and uses the PoS mechanism. Learn more about it here.
Ankr provides nodes & verifies transactions for other blockchains using this idle computing power. Learn more about it and how you can buy Ankr Crypto in India.