Free due diligence — every check, one place
Due diligence is the investigation you do before you trust a company — before an investment, an acquisition, a vendor contract, a hire or a partnership. OpenDD runs the checks that normally sit behind expensive platforms, for free, straight from public registries and primary sources. This hub links every tool and guide.
Open the full toolkit →What due diligence covers
A complete review spans several angles: who legally owns and controls the company, its financial health, the intellectual property it holds, its litigation and regulatory history, whether it appears on any sanctions list, and how it handles security, privacy and AI. OpenDD gives each of these its own module — run one, or run them together as a dossier.
Start with a tool
Jump straight into the check you need:
- Corporate due diligence — ownership, officers, subsidiaries, SEC filings.
- IP due diligence — patents, trademarks, chain of title, encumbrances.
- Sanctions & OFAC screening — OFAC, EU, UK and UN consolidated lists.
- Vendor & third-party due diligence — security, privacy, data governance, adverse media.
- M&A due diligence — the full pre-deal workup in one pass.
Or follow a guide
New to a topic? Our guides walk through the process step by step, then hand off to the matching tool. Start with What is due diligence?, the company due-diligence walkthrough, or browse all articles. When you are ready to capture the process, grab the free due diligence checklist.
Frequently asked questions
Is OpenDD really free?
Yes. The core due-diligence modules run on a free plan with a monthly credit allowance, drawing on public registries and primary sources. There is no card required to start.
What sources does it use?
Government and primary sources — SEC EDGAR, the USPTO and EPO, federal court dockets (CourtListener/RECAP), OFAC and other sanctions lists, and companies' own published disclosures — never scraped personal data.
Who uses it?
Founders, investors, M&A and corporate-development teams, procurement and vendor-risk functions, compliance teams, paralegals and IP counsel.