E-signature / Contracts vendors

8 distinct e-signature / contracts vendors appear across 52 companies in the VendorStacks index — not inferred from tracking pixels or job posts, but read from what each company publishes about itself. DocuSign leads at 76.9% adoption; the top five together account for 132.6%.

Most used e-signature / contracts vendors

Ranked by how many companies name each vendor in their own published documentation. Share is of the 52 companies we have a e-signature / contracts vendor for.

What else these companies run

Of the companies with a e-signature / contracts vendor, this is the share that also disclose a vendor in each other category — the co-adoption pattern behind most segmentation work.

Companies with a e-signature / contracts vendor

curl "https://api.vendorstacks.com/v1/prospect?category=esignature_contracts" \
  -H "Authorization: Bearer vr_live_…"

How this is measured

Companies disclose their own vendors — subprocessor lists, trust centres, security pages and privacy documentation name third parties by regulation or by policy. VendorStacks crawls that public surface, renders JavaScript pages and PDFs, and matches a deterministic taxonomy of 24 categories against what the company itself published. No tracking pixels, no DNS fingerprints, no guessing from job posts. Every match keeps the sentence it came from, which is why a share figure on this page can be traced back to a specific document on a specific company's site. How it works →

Frequently asked questions

Which e-signature / contracts vendor is most widely used?

DocuSign appears in 40 of the 52 companies we have a e-signature / contracts vendor for — 76.9% of them. The next four together account for 55.7%.

How do you know a company uses a e-signature / contracts vendor?

Because the company published it. Subprocessor lists, trust centres, security pages and privacy documents name vendors by law or by policy. We extract the vendor name and keep the sentence it came from, so every match has a quotable source rather than an inferred fingerprint.

How current is this data?

The most recently refreshed company in this category was updated 2026-08-26. Disclosure pages change slowly — usually when a vendor is added or dropped — and we re-scan on a rolling basis.

Can I get the full list rather than a sample?

Yes. One API call returns every company in this category with its vendors, the evidence row, and the source URL. A free key includes 25 credits and each lookup costs one.

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