Insider Allocation
The share of a token's supply reserved at launch for the founding team, employees, advisors, and early investors.
Launch distributions are published as a table splitting supply between public distribution, team, investors, ecosystem programs, and treasury, usually with a vesting schedule attached to each line. The insider share matters for two separate reasons: it determines how much dilution existing holders face as those allocations unlock, and it determines how much governance voting power sits with a small group. Verification means comparing the published table with the on-chain balances of addresses funded at genesis, since categories can be relabeled. An allocation described as ecosystem or community is only distinct from an insider allocation if a different set of people controls the wallet.
In practice
Comparing a published distribution table with the genesis balances of tagged addresses is the standard way to check whether the stated split matches the chain.
The common misunderstanding
A modest insider percentage in a published table can still coincide with concentrated control if the ecosystem or foundation allocation is held by the same multisignature wallet.