What AI assistants recommend when buyers ask about open-source e-signature tools — measured weekly across engines, published as open data.
Sample: 33 AI answers · Window: May 23, 2026 – Jun 20, 2026 (4-week rolling)
| # | Product | Share | Trend | Engines | |
|---|---|---|---|---|---|
| 1 | DocuSeal | 66.7% avg pos 3.1 | — | GEMINI 100%CLAUDE 100%PERPLEXITY 100% | Claim |
| 2 | OpenSign | 63.6% avg pos 4.7 | — | GEMINI 100%CLAUDE 85.7%PERPLEXITY 100% | Claim |
| 3 | LibreSign | 45.5% avg pos 6.3 | — | GEMINI 25%CHATGPT 45.5%CLAUDE 57.1%PERPLEXITY 45.5% | Claim |
| 4 | SignServer | 33.3% avg pos 5.3 | — | GEMINI 25%CHATGPT 63.6%PERPLEXITY 27.3% | Claim |
| 5 | DocuSign Insight docusign.com | 33.3% avg pos 5.5 | — | CHATGPT 72.7%CLAUDE 14.3%PERPLEXITY 18.2% | Claim |
| 6 | Nextcloud nextcloud.com | 33.3% avg pos 7.5 | — | CHATGPT 27.3%CLAUDE 42.9%PERPLEXITY 45.5% | Claim |
| 7 | Documenso documenso.com | 27.3% avg pos 2.4 | — | GEMINI 25%CLAUDE 28.6%PERPLEXITY 54.5% | Claim |
| 8 | OpenSignature | 21.2% avg pos 3.3 | — | CHATGPT 63.6% | Claim |
| 9 | Open eSignForms | 15.2% avg pos 7.4 | — | CHATGPT 45.5% | Claim |
| 10 | Supersign supersign.cc | 9.1% avg pos 1 | — | GEMINI 50%CHATGPT 9.1% | Claim |
| 11 | Digital Signature Service (DSS) | 6.1% avg pos 4 | — | CLAUDE 14.3%PERPLEXITY 9.1% | Claim |
| 12 | Docker docker.com | 6.1% avg pos 6 | — | PERPLEXITY 18.2% | Claim |
| 13 | HelloSign | 6.1% avg pos 6 | — | CHATGPT 9.1%CLAUDE 14.3% | Claim |
| 14 | SigniFlow signiflow.com | 6.1% avg pos 11 | — | PERPLEXITY 18.2% | Claim |
| 15 | DocuSign | 6.1% | — | CLAUDE 28.6% | Claim |
| 16 | Zapier zapier.com | 6.1% | — | CLAUDE 28.6% | Claim |
| 17 | CryptPad cryptpad.fr | 3% avg pos 1 | — | CHATGPT 9.1% | Claim |
| 18 | Docker Compose | 3% avg pos 2 | — | PERPLEXITY 9.1% | Claim |
| 19 | Pigeon | 3% avg pos 2 | — | CHATGPT 9.1% | Claim |
| 20 | Kubernetes | 3% avg pos 3 | — | PERPLEXITY 9.1% | Claim |
| 21 | LibreOffice libreoffice.org | 3% avg pos 3 | — | GEMINI 25% | Claim |
| 22 | Sign PDF | 3% avg pos 3 | — | CHATGPT 9.1% | Claim |
| 23 | Django E-Signature | 3% avg pos 4 | — | CHATGPT 9.1% | Claim |
| 24 | JSignPdf | 3% avg pos 4 | — | GEMINI 25% | Claim |
| 25 | OnlyOffice onlyoffice.com | 3% avg pos 4 | — | CHATGPT 9.1% | Claim |
| 26 | Cryptshare | 3% avg pos 5 | — | CHATGPT 9.1% | Claim |
| 27 | Sertifi sertifi.com | 3% avg pos 5 | — | CHATGPT 9.1% | Claim |
| 28 | Signer | 3% avg pos 5 | — | CHATGPT 9.1% | Claim |
| 29 | EU Digital Signature Service (DSS) | 3% avg pos 6 | — | PERPLEXITY 9.1% | Claim |
| 30 | Adobe Acrobat Sign adobe.com | 3% avg pos 7 | — | CHATGPT 9.1% | Claim |
| 31 | Signatu | 3% avg pos 7 | — | CHATGPT 9.1% | Claim |
| 32 | AWS SNS aws.amazon.com | 3% avg pos 9 | — | CHATGPT 9.1% | Claim |
| 33 | Apigee cloud.google.com | 3% avg pos 9 | — | CHATGPT 9.1% | Claim |
| 34 | CIVIC Office | 3% avg pos 9 | — | CHATGPT 9.1% | Claim |
| 35 | E-Sign | 3% avg pos 9 | — | CHATGPT 9.1% | Claim |
| 36 | Microsoft Azure API Management azure.microsoft.com | 3% avg pos 9 | — | CHATGPT 9.1% | Claim |
| 37 | Signaturey | 3% avg pos 9 | — | CHATGPT 9.1% | Claim |
| 38 | Simple-Signatures | 3% avg pos 9 | — | CHATGPT 9.1% | Claim |
| 39 | Papersign | 3% avg pos 11 | — | CHATGPT 9.1% | Claim |
| 40 | PDFescape pdfescape.com | 3% avg pos 13 | — | CHATGPT 9.1% | Claim |
| 41 | MongoDB | 3% avg pos 15 | — | PERPLEXITY 9.1% | Claim |
| 42 | PostgreSQL | 3% avg pos 15 | — | PERPLEXITY 9.1% | Claim |
| 43 | Redis redis.io | 3% avg pos 15 | — | PERPLEXITY 9.1% | Claim |
| 44 | SignaturePad | 3% avg pos 15 | — | CHATGPT 9.1% | Claim |
| 45 | Snipe-IT snipeitapp.com | 3% avg pos 17 | — | CHATGPT 9.1% | Claim |
| 46 | Zivver | 3% avg pos 17 | — | CHATGPT 9.1% | Claim |
| 47 | OpenSSL | 3% avg pos 18 | — | CHATGPT 9.1% | Claim |
| 48 | Zsign | 3% avg pos 19 | — | CHATGPT 9.1% | Claim |
| 49 | SSL E-Signature | 3% avg pos 20 | — | CHATGPT 9.1% | Claim |
| 50 | Zimbra zimbra.com | 3% avg pos 20 | — | CHATGPT 9.1% | Claim |
| 51 | eSignLive esignlive.com | 3% avg pos 25 | — | CHATGPT 9.1% | Claim |
| 52 | AWS | 3% | — | CLAUDE 14.3% | Claim |
| 53 | Azure | 3% | — | CLAUDE 14.3% | Claim |
| 54 | Cryptocat | 3% | — | CHATGPT 9.1% | Claim |
| 55 | Django-Signature | 3% | — | CHATGPT 9.1% | Claim |
| 56 | FreeSign freesign.io | 3% | — | CHATGPT 9.1% | Claim |
| 57 | Kubernetes Operators kubernetes.io | 3% | — | CLAUDE 14.3% | Claim |
| 58 | NotaryX notaryx.eu | 3% | — | CHATGPT 9.1% | Claim |
| 59 | PkiSuite | 3% | — | CHATGPT 9.1% | Claim |
| 60 | Sproof Sign | 3% | — | CLAUDE 14.3% | Claim |
| 61 | WPsigner wpsigner.com | 3% | — | CHATGPT 9.1% | Claim |
| 62 | actaSIGN actasign.swiss | 3% | — | CHATGPT 9.1% | Claim |
| 63 | eSign.AI | 3% | — | GEMINI 25% | Claim |
| 64 | n8n n8n.io | 3% | — | CLAUDE 14.3% | Claim |
Independence: Orbator customers are badged for disclosure. Customer status does not affect prompts, sampling, extraction, or ranking — see the methodology. Your product on this list? Claim it to see the prompts behind your rank and track it weekly.
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