Holochain offers a decentralized app framework emphasizing P2P networking. It allows for serverless application development with high scalability and security, bypassing traditional blockchain constraints.
Holochain is a data integrity protocol for distributed applications that uses a Distributed Hash Table (DHT) that in essence gives every participant their own "chain". But Holochain is not a blockchain, despite what the name implies. For example, publishing information on a DHT is similar to using BitTorrent.
Holochain intends to offer a distributed framework for generalized computing that supports programming and application development, something the Holochain team believes other crypto-projects do not offer.
On top of Holochain sits Holo, a distributed network of hosts and users sharing and consuming computing power to host decentralized applications (dapps), data repositories, etc., and hosts are paid for their services. But in the same way Holochain is not a blockchain, according to the development team, Holo is also not a token. It's an "asset-backed mutual-credit crypto-accounting system" that Holochain designed for use between participants and for immunity to volatile or speculative habits common to crypto-projects.