Grants Stack is not the core capital-allocation primitive; it is the application layer built on top of Allo Protocol.
The most important architectural split is Manager / Builder / Explorer on top of Allo’s registry / pool / strategy contracts.
The stack matters because it turns capital-allocation contracts into a grants-program operating system: round creation, applicant workflows, donor discovery, multi-round checkout, payouts, and partner program operations.
Gitcoin Passport integration is not a side feature. The support and app pages explicitly make Sybil defense part of applicant and donor gating, which means identity scoring can shape who counts in a nominally open funding mechanism.
The dedicated Grants Stack Indexer is analytically important because it becomes the data layer that organizes Allo events into a queryable structure for the application. This means legibility, analytics, and some practical UX depend on indexer design rather than raw chain reads alone.
The official app page records that Grants Stack served as the primary infrastructure for the Gitcoin Grants Program from 2023 through May 2025, making it historically important even if product emphasis later shifted.
Specific source signals worth retaining
Gitcoin app page: explicitly says Grants Stack is an open-source grants management platform built on Allo Protocol and describes its role as shared infrastructure for grants programs.
Support article: names Manager, Explorer, and Builder as the three main components and spells out their responsibilities for operators, donors, and project owners.
Support article + app page: describe Passport integration as Sybil defense for donors and applicants.
grants-stack README: shows the repo structure and confirms separate applications for round management, grants exploration, and project management.
grants-stack-indexer README: shows that the product stack relies on a dedicated indexer serving structured data over HTTP/GraphQL rather than merely reading contracts directly.
Why this entry belongs in the corpus
Grants Stack is a useful addition because it sharpens the protocol-versus-product split in public-goods funding.
It helps compare where authority sits before, during, and after allocation: in underlying strategy contracts, in program-operator workflows, in project-profile reputation systems, in Sybil-defense gates, and in the indexer/data layer that makes the system usable.
The reusable insight is that many decentralized funding systems are only partly defined by their headline allocation math; they are equally shaped by the surrounding application layer that handles eligibility, discoverability, review flow, donations, and historical memory.