The website transactionfee.info shows Bitcoin protocol layer statistics. This includes statistics about Bitcoin transactions, their in- and outputs, about blocks and Bitcoin scripts. The project is a joint effort with Bitrefill CEO @ziggamon.
The transactionfee.info website was initially designed in 2018 to raise awareness about the inefficient use of block space by exchanges, services, and wallets. Read about the 2018 version here
We iterated and released the 2020 version as we had reached our goal of raising awareness and saw the usage of the fee efficiency checker decline over 2019. blockstream.info can be used as an alternative to our fee efficiency checker for now.