5 Free GuideStar Alternatives for Nonprofit Research in 2026

If you’ve ever tried to research a nonprofit’s finances, you’ve probably landed on GuideStar (now part of Candid). And if you’ve tried to do anything beyond looking at a basic profile, you’ve probably hit a paywall.

Candid’s premium plans start at $3,499/year, and their API starts at $4,800/year just for 40 fields. For many fundraisers, grant writers, journalists, and small nonprofits, that’s simply not in the budget.

The good news: 990 tax return data is public record. You shouldn’t need an enterprise contract to access it. Here are five alternatives worth considering.

1. 501(see)

501(see) is built specifically to make nonprofit data accessible without the enterprise pricing.

• Search across 1.8M+ organizations, grants, and officer compensation data
• Filter by state, NTEE category, revenue range, and more
• Grant data showing who’s giving money to whom, and how much
• Officer compensation so you can see exactly what executives are paid
• Unlimited users per account, no per-seat charges
• Transparent pricing starting with a free tier

Where GuideStar gates basic financial data behind a login wall, 501(see) lets you search and explore immediately. The data comes directly from IRS 990 filings, and you always know exactly which filing year you’re looking at.

2. ProPublica Nonprofit Explorer

ProPublica Nonprofit Explorer is the gold standard for free nonprofit lookup. It offers full-text search across 3M+ e-filed 990s and lets you filter by state, revenue, and NTEE code, all without creating an account.

Pros: Completely free, no login required, full 990 PDF viewer, and an API (though it hasn’t been updated since 2016). ProPublica has also added useful features like audit findings and theft/diversion flags.

Cons: No grant-level data, no advanced combined filtering (you can’t search for “nonprofits in Texas with revenue over $5M in the education sector”), no bulk export, and no enrichment or contact data.

Great for quick lookups. Limited if you need to do serious prospecting or analysis.

3. Charity Navigator

Charity Navigator is primarily a rating and evaluation tool, but it’s also a decent free lookup for basic nonprofit data.

Pros: Free access to ratings, financials, and accountability metrics. The “Encompass” rating system combines financial health, accountability, and leadership data into a single score. Useful for donors evaluating where to give.

Cons: Focused on evaluation rather than research. You can’t filter by specific financial metrics, search for grants, or look up officer compensation in any detail. Not built for prospect research or grant writing.

4. IRS Tax Exempt Organization Search

The IRS TEOS is the official source (and it shows). You can confirm an organization’s tax-exempt status and download raw 990 filings as PDFs or XML.

Pros: It’s the authoritative source. If you need to verify status or pull an original filing, this is where you go.

Cons: The search is bare-bones. No financial summaries, no trend data, no way to compare organizations. You’re downloading individual PDFs and reading through IRS forms manually. Fine for one-off lookups, painful for any kind of research workflow.

5. Open990

Open990 extracts and organizes data from electronically filed 990s. It’s a research-oriented tool with a cleaner interface than the raw IRS data.

Pros: Free access to extracted 990 data, searchable by organization name. Shows key financial figures in a readable format.

Cons: Limited search filtering, smaller dataset than ProPublica, and the project has had inconsistent update cycles. No grant data or officer compensation search.

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So which should you use?

It depends on what you’re doing:

• Quick status check or one-off lookup: ProPublica or IRS TEOS
• Donor evaluating where to give: Charity Navigator
• Grant writer researching funders: 501(see) (grant data is the differentiator)
• Prospect researcher or fundraiser: 501(see) (officer compensation + financial filtering)
• Developer building an integration: ProPublica has a free API; 501(see) offers a modern API with transparent pricing

The nonprofit data space has been dominated by expensive, gatekept tools for too long. The underlying data is public; the IRS publishes it. The question is just how much work you want to do to make sense of it.

Try 501(see) free, no credit card required.