#4 in Proposals & ContractsUpdated 2026-08

OpenSign™

by OpenSign · Open-source PDF e-signature platform

42.6 — BenchRank score out of 100

Homepage

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Overview

OpenSign™ is an open-source platform for signing PDF documents, presented as an alternative to DocuSign. Several people can be invited into a signing process, and every completed document comes with a certificate recording access logs. Signed documents can be stored and organised in the OpenSign™ Drive vault.

Best for: Individuals and businesses wanting an open-source PDF e-signature alternative to DocuSign
Pricing: The homepage advertises a free plan with unlimited e-signatures and free collaboration, but shows no figures and no paid plans.
Runs on: WebSelf-hosted

Strengths and trade-offs

Strengths

Free plan advertised with unlimited e-signatures
Extra signers can be invited at no additional cost
Each signed document gets a certificate with access logs
OpenSign™ Drive vault included for storing documents

Trade-offs

Signing is described only for PDF documents
No prices shown on the captured page, though a pricing page exists
Encryption and API support are only asserted in meta copy, not detailed
Support appears to run through GitHub and Discord, not a stated SLA

How this score is made up

Each dimension is scored out of 100 and combined into the headline score using fixed weights.

MCP support: 0 out of 100
API quality: 15 out of 100
Documentation: 90 out of 100
Agent friendliness: 80 out of 100
Changelog: 80 out of 100
Marketing site structure: 45 out of 100
Operational trust: 0 out of 100

Measured, but not part of the score

Useful to know, but not a mark for or against the product — so these do not affect the ranking.

Openness: 55 out of 100
Maintenance: 100 out of 100

This doesn’t look right — report a problem with OpenSign™’s score

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