Chattee and Knack share the top of this question, each appearing in 67% of answers with identical slot scores separated by just one point.
Chattee and Knack both land at average position 2, recommended consistently by Gemini and Perplexity but absent from ChatGPT's picks entirely. ChatGPT instead surfaces ACAI, a purpose-built nonprofit platform, in 3 of its 4 answers, giving ACAI a tightly concentrated presence that neither of the leaders shares across all three assistants. Appy Pie is the only brand that turns up across every model, though it averages position 6, meaning it fills out lists rather than leads them. The recurring rationale in the answers is mission-fit: donor management, grant tracking, and volunteer tooling drive recommendations more than raw app-building capability.
AI-generated analysis of the September 2026 measurements.
Every brand recommended for this question, from 12 answers across ChatGPT, Perplexity, and Gemini.
| # | Brand | Slot score | Appears in | Avg. position |
|---|---|---|---|---|
| 1 | Chattee | 67% | #2 | |
| 2 | Knack | 67% | #2 | |
| 3 | Appy Pie | 58% | #6 | |
| 4 |  Softr | 33% | #4 | |
| 5 | ACAI | 25% | #2 | |
| 6 | Shakespeare | 25% | #3 | |
| 7 |  Bubble | 25% | #5 | |
| 8 | Grantable | 25% | #6 |
Slot score is position-weighted, 0 to 100: being recommended first counts far more than a trailing mention. "Appears in" is the share of answers naming the brand at all.
ChatGPT, Perplexity, and Gemini each answered this question in two phrasings, several times each, with live web access and citations: the closest API-reachable version of the real assistant experience (no personalization or account memory, which no vendor can provide). Model-memory answers (no web) are measured separately and shown above as a comparison surface. A brand counts once per answer that recommends it. The exact questions:
Part of the AI App Builders ranking. Method details on the methodology page. Rankings reflect measured AI answers, not paid placement.
Who wins when the question changes:
Nonprofits teams also ask: best CRM for nonprofits · best customer support software for nonprofits · best project management tool for nonprofits · best no-code-builders for nonprofits
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