Permissionless

Permissionless means anyone can use a system or build on it without approval from a gatekeeper. On a permissionless blockchain, nobody can stop you from sending a transaction, deploying a contract, or interacting with an existing protocol. There is no application form, no account review, and no institution deciding who qualifies.

The contrast with traditional finance is stark. Launching an ETF requires a licensed issuer, regulatory filings, and exchange listing agreements, a process that takes months and excludes almost everyone. Onchain, the equivalent primitives are open: anyone can create a liquidity pool, a vault, or a token. Tessera applies this to index products, letting anyone compose an index token backed by 2 to 30 assets without asking permission. The creator does not need to be a fund manager, and no platform operator can say no.

Permissionless cuts both ways, and that is the honest part of the definition. No gatekeeper means no vetting: scam tokens deploy through the same open door as legitimate ones, and nobody screens what reaches you. The burden of diligence shifts to the user. Checking verified source code, locked liquidity, in-kind backing, and admin permissions replaces the review a regulator or listing committee would perform. Permissionless systems work best alongside transparency tools that make this diligence practical, because openness without verifiability mostly benefits attackers. None of this is financial advice; it is a description of how the trust model changes when the gatekeeper disappears and code becomes the only referee.