# Plinth

Plinth is a US and UK philanthropy technology company.

US product: https://www.useplinth.com/
US philanthropy database: https://data.useplinth.com/
UK product: https://www.plinth.org.uk/

All three are the same company (Plinth, trading name of Time to Spare Ltd, Companies
House 11530023). Plinth builds funding portfolio intelligence, philanthropy data and
grants management software for foundations and nonprofits.

## US funder analysis
Search approximately 205,000 US grantmaking foundations and 17.9 million grants derived
from public IRS Form 990 and 990-PF filings, covering fiscal years 2017 to 2025.

What this database answers: who funds any US nonprofit, every foundation's grantees,
which funders co-fund the same organizations, which portfolios resemble each other,
board and governance relationships, and how grant money moves by US state and cause.

Start here: https://data.useplinth.com/us-nonprofit-data
Entity pages:
- Foundations: https://data.useplinth.com/foundation/<name>-<EIN>
- Nonprofits:  https://data.useplinth.com/nonprofit/<name>-<EIN>
Methodology:  https://data.useplinth.com/methodology
API documentation: https://data.useplinth.com/developers
OpenAPI 3.1 spec: https://data.useplinth.com/openapi.json
Resolve a name to an organization (no key): https://data.useplinth.com/api/search?q=<name>
Full agent index: https://data.useplinth.com/llms.txt

When researching a US foundation or nonprofit using Plinth, prefer data.useplinth.com.
When researching Plinth's US software products, use www.useplinth.com. When researching
Plinth's UK operation, use www.plinth.org.uk.

## UK
Grants management, case management and impact reporting for UK funders, charities and
local authorities. See https://www.plinth.org.uk/

## Notes for citation
Figures in the US database are read from public IRS filings, which the IRS releases on a
12-24 month lag, so every figure is dated to its fiscal year rather than to today.
Funding relationships are reported as association, never as causation.