Polkadot Price

Polkadot is built for a specific problem: blockchains cannot easily talk to each other. Most attempts to solve this use bridges, which have repeatedly proved to be the weakest link in the ecosystem. Polkadot's approach is to have chains share security from the outset rather than connect after the fact.

The network launched in May 2020, initiated by the Web3 Foundation and built by Parity Technologies, with Gavin Wood — previously co-author of Ethereum's yellow paper — as its founder.

Its structure centres on a relay chain that provides security and coordination, with individual chains called parachains running in parallel and inheriting that security. A parachain does not recruit its own validators or bootstrap its own security budget; it uses the relay chain's. Messages pass between them through a native protocol rather than through third-party bridges.

Consensus is split between two mechanisms. BABE handles block production, assigning slots to validators. GRANDPA handles finality, and can finalise many blocks at once rather than one at a time. Validators are selected through nominated proof of stake, where token holders back validators they trust and share both rewards and penalties.

Access to the network has moved to a model called coretime, where chains purchase computational capacity rather than winning long auctions for a permanent slot. This lowered the barrier for projects that need blockspace intermittently.

DOT has no supply cap. Since November 2024 issuance has been fixed at 120 million DOT per year, with 85 percent going to stakers and 15 percent to the treasury. Because the amount is fixed while the base grows, the inflation rate declines over time, and treasury burns plus coretime sales reduce net issuance further.

A successor architecture called JAM appears in the documentation as a proposed future upgrade, not a live system.