Comparison · Instrumentl
Plinth vs Instrumentl
These are not competing products, and a comparison that pretends otherwise will mislead you. Instrumentl is pipeline software — live opportunities, deadlines, applications, reporting. Plinth is a research corpus— eight years of historical IRS grant records resolved into a network. They share the word “grants” and very little else.
Every Instrumentl figure below was read from Instrumentl’s own pages on 12 August 2026.
In one screen
- Instrumentl is grant-prospecting and pipeline software: 36,000+ active RFPs, deadline tracking, application workflow and reporting calendars.
- Plinth is a historical research corpus: 17.9 million IRS 990 grants across 205,000 funders, resolved into a funding network.
- Instrumentl has no free tier. Plans start at $299 a month billed annually, with a 14-day trial of any plan.
- Instrumentl's own sources disagree on API access: the pricing page lists it on Enterprise only, the help centre says Full Lifecycle, Enterprise and University.
- Plinth has no deadline tracking, no application workflow and no live RFP feed, and is not a substitute for pipeline software.
When Instrumentl is the right answer
If your job is to find what is open now and get applications in on time, Instrumentl is built for exactly that and we have none of it. It tracks 36,000+ active RFPs, matches them to your organization’s profile, and runs the pipeline through deadlines, tasks and reporting. We do not track a single deadline, have no application workflow, and hold no live opportunity feed.
It also solves the freshness problem we cannot. Active RFPs are current by definition; our records inherit the 12 to 24 month IRS filing lag. For “what can I apply for this quarter”, we are the wrong tool at any price.
When Plinth is the right answer
Research depth on funders who never post an RFP. Most US foundation money moves without a public call for applications. Those funders appear in our corpus because they filed a 990 listing the grant, whether or not they advertise. An opportunity feed cannot show you a funder that never posts one.
The relationships around a funder. Who else funds their grantees, how strongly, whether they renew or give once, and what their board connections look like. That is network structure computed across the whole corpus, not a profile page.
Cost. Reading is free without an account, and the API is free with a key. Instrumentl has no free tier and starts at $299 a month billed annually.
Side by side
| Dimension | Plinth | Instrumentl |
|---|---|---|
| Organizations covered | 205k funders · 327k nonprofit pages | 450k+ funder profiles source, 2026-08-12 |
| Grant recordsCandid and Impala both publish larger cumulative grant counts than ours. We do not compete on volume. | 17.9M grants, FY2017–2025 | 36k+ active RFPs (opportunities, not historical awards) source, 2026-08-12 |
| Nonprofit → funder lookup | Free public page per nonprofit | In-product source, 2026-08-12 |
| Co-funder analysisThe nearest competitor feature aggregates funders over a peer segment. It is a different question, not a weaker version of the same one. | Funder-to-funder overlap strength, thin evidence discounted | Not publicly documented |
| Board / governance relationshipsNot a Plinth-only capability. Impala's relationship graph is larger than anything we claim. | From Form 990 Part VII, on free public pages | Not publicly documented |
| Portfolio clusteringOurs is unsupervised — themes emerge from what a funder actually funds. The nearest competitor product asks the user to supply the taxonomy. | Unsupervised clustering over org text embeddings | Not publicly documented |
| Semantic search | Meaning-based org search over 990 mission text, in the API and the chat | Not publicly documented |
| Public API | Free with a key, 50 calls/month; paid plans for volume | Pricing page lists API access on Enterprise only; the help centre says Full Lifecycle, Enterprise and University. The vendor's own sources disagree. source, 2026-08-12 |
| Natural-language querying | Ask a question in plain English; it writes and runs the query | Claude connector source, 2026-08-12 |
| Reading a page without an accountEvery platform here publishes something. What differs is how much before the prompt to sign up. | Up to 2,000 grantees detailed per funder page, tail summarised | Grant listing pages, “27 of 8,000+ results” source, 2026-08-12 |
| Government funding | Federal (USAspending) plus 9 state checkbooks, joined to the same organizations | Federal and state funding opportunities source, 2026-08-12 |
| Geographic mapping | Service area resolved to counties, joined to community need data | Grants by state and city source, 2026-08-12 |
| Data freshnessA dimension we lose. We are a depth-and-completeness corpus, not a real-time monitor. | Monthly refresh, 12–24 month IRS filing lag | Active RFP and deadline tracking source, 2026-08-12 |
| Entry price | Free to read; free API key | Discover from $299/month billed annually. No free tier; 14-day trial. source, 2026-08-12 |
Where Plinth is the wrong tool
- The IRS filing lag is 12 to 24 months. For what a foundation is funding this quarter, a platform that tracks live opportunities will beat us — Instrumentl tracks active RFPs and deadlines, and Impala refreshes most sources weekly.
- We cover electronic filers. Organizations that file on paper, and those too small to file a full return, are absent or thin.
- Entity resolution is deterministic and tuned to drop rather than guess, so the graph is high-precision and knowingly incomplete. A grant we cannot confidently resolve to an EIN is left out rather than attached to the wrong organization.
- Funder pages detail the top 2,000 grantees by value and summarise the tail. For a donor-advised fund sponsor with 100,000 grantees, the page is a summary, not the full ledger.
- We do not do grant-pipeline management: no deadline tracking, no application workflow, no reporting calendar. If that is the job, Instrumentl is built for it and we are not.
- Candid and Impala both publish larger cumulative grant counts than ours, and Candid has been the sector's reference source since long before we existed.
Using both
The sensible pattern is Instrumentl for the pipeline and Plinth for the research under it — and because we are free to read, adding us alongside a paid tool costs nothing. Start with a funder dossier, look up who funds a nonprofit, or read the API docs.
Questions and answers
- Is Plinth an alternative to Instrumentl?
- Only partly, and for most people the answer is no. Instrumentl finds live funding opportunities and manages the pipeline — deadlines, applications, reporting. Plinth holds historical grant records from IRS filings and resolves them into a network. If you want to know which foundations funded organizations like yours over the last eight years, and who else funds alongside them, Plinth answers that free. If you want to know what is open to apply for this month and when it closes, Instrumentl is built for that and we are not.
- Does Instrumentl have a free tier?
- No free tier is listed. Instrumentl states that you can try any plan for 14 days before committing. Published pricing starts at $299 a month for Discover billed annually, or $349 monthly, rising to $999 a month for Full Lifecycle billed annually, with custom Enterprise pricing.
- Does Instrumentl have an API?
- Yes, but its own sources disagree on which plans include it. Instrumentl's pricing page marks API access as not included on Discover, Pre-Award and Full Lifecycle, implying Enterprise only. Its help centre states the API is available on Full Lifecycle, Enterprise and University plans. The API covers funders, grants, saved grants, submission goals, projects, tasks and user data, with webhooks. Plinth's API is free with a key at 50 calls a month.
- Can I use both?
- That is the common pattern. Instrumentl for the live pipeline and deadlines; Plinth for the research underneath it — a funder's full grant history, its co-funders, whether it renews relationships or gives once, and what its board connections look like. Plinth is free to read, so using it alongside a paid pipeline tool costs nothing.
How this comparison was made.Every figure attributed to another company was read from that company’s own public pages on 12 August 2026, and each cell links to the page it came from. Review sites, software directories and comparison blogs were not used as sources. Where we could not confirm a capability from a vendor’s own documentation, the cell reads “not publicly documented” — that means we did not find it, not that it is absent. Pricing is the published list price and excludes discounts and custom terms. Product names are used only to identify the products compared. Tell us if something here is wrong and we will correct it.