Straight answer
Best AI grant writing tools for small nonprofits
Last checked Oct 30, 2026. Every price comes from the tool's own pricing page.
The short answer
For a small nonprofit, the cheapest way to start is a free plan: Grantable has a $0 plan, and Granted AI gives you 1 AI-drafted proposal a month for free.
The lowest-priced paid grant writing plans we found are Fundwriter Basic at $22 a month billed annually ($29 monthly) and Granted AI Basic at $29 a month. Grantboost starts at $32 a month and adds grant discovery. Instrumentl ($299 a month, paid annually) is a discovery and tracking platform for teams with a bigger grants pipeline.
All prices were read from each tool's own pricing page on Oct 30, 2026.
Compared, with sources
| Tool | What it does for you | Plans and prices (as shown) | Free plan | Source |
|---|---|---|---|---|
| Grantable | An AI workspace for drafting grant proposals, with no per-seat fees. | Free $0 · Starter $50/mo · Pro $150/mo | Yes | Pricing page checked Oct 30, 2026 |
| Granted AI | Searches grants and funders, reads the RFP and drafts a proposal you export to Word. | Free (1 AI draft a month) · Basic $29/mo (3 drafts) · Professional $89/mo, or $57/mo billed annually | Yes | Pricing page checked Oct 30, 2026 |
| Fundwriter | AI writing help for grant proposals, appeals and donor letters. | Basic $29/mo, or $22/mo billed annually (20,000 words a month) · Professional $89/mo, or $68/mo billed annually | No | Pricing page checked Oct 30, 2026 |
| Grantboost | Finds grant opportunities that match your mission and drafts applications. | Find Grants $32/mo (1 seat) · Find + Write Grants $49/mo (5 seats) | No | Pricing page checked Oct 30, 2026 |
| Instrumentl | Grant discovery, deadline tracking and a grants pipeline for teams. | Discover $299/mo paid annually, or $349 monthly · 14-day free trial | No | Pricing page checked Oct 30, 2026 |
| Claude | A general AI assistant you can use to outline, edit and tighten a draft you already have. | Free $0 · Pro $17/mo billed annually, $20 monthly | Yes | Pricing page checked Oct 30, 2026 |
Order: free plans first, then by lowest paid price, then a general assistant. Plans and limits are summarized from each pricing page; open the source for the full list.
Questions people ask
What is the best AI grant writing tool for a small nonprofit?
For a small nonprofit on a tight budget, start with a free plan: Grantable has a free plan and Granted AI gives 1 AI draft a month for free. If you need a paid plan, Fundwriter Basic ($22 a month billed annually, $29 monthly) and Granted AI Basic ($29 a month) are the lowest-priced dedicated grant writing plans we found on Oct 30, 2026.
Is there a free AI grant writing tool?
Yes. Grantable lists a Free plan at $0, and Granted AI includes limited free access with 1 AI draft a month and 3 grant searches. A general assistant such as Claude also has a free plan you can use to edit a draft you wrote.
Which tools find grants as well as write them?
Granted AI includes grant search and funder matching, Grantboost advertises discovery across 1.5 million sources with AI mission matching, and Instrumentl is built for finding opportunities and tracking deadlines. Fundwriter focuses on the writing.
Do these tools offer nonprofit discounts?
Granted AI says it has no separate nonprofit discount because its regular prices are already set for nonprofits. For the others, check each pricing page; we only list a discount when the official page states it.
Can AI write the whole grant for us?
Treat AI output as a first draft. Funders want your real numbers, outcomes and stories, and every deadline and requirement should be checked against the funder's own page before you submit.
How were these prices checked?
Each price was read from the tool's own pricing page on Oct 30, 2026 and is linked in the table. Nothing on this page is sponsored, and the order is not for sale.
Sorted for usefulness, not payment: nothing on this page is sponsored. Prices change, so check the tool's own page before you buy. Nothing here is legal, tax or financial advice. How we check prices
New tools and price changes, once a week
One short email. Every price has its source and the date we checked it. At most one sponsor per issue, marked “Sponsored.”
Free guide: 18 AI tools under $20 a month for a small business, every price sourced and dated. No sign-up needed to read it.