What licences do the two carry?

Both are under AGPL-3.0. For internal operation without redistribution that is unproblematic. Both vendors also have commercial offerings; which features sit there belongs checked before deciding.

Is a self-hosted signature legally valid?

That depends on the required signature level, not on the operating model. The eIDAS Regulation distinguishes simple, advanced and qualified electronic signatures. The qualified level requires a trust service provider, which neither solution replaces.

Which documents are fine with a simple or advanced signature?

In practice the majority of business traffic: quotes, orders, internal approvals, many contracts. Written-form requirements under German law, for instance for fixed-term employment contracts, call for the qualified level or paper. For guarantee (surety) declarations, Section 766 BGB excludes the electronic form entirely, leaving only paper; the exception is a guarantee that is a commercial transaction for a merchant (Section 350 HGB), which requires no form. That is a legal question, not a product question.

What separates Documenso from DocuSeal technically?

Documenso builds on a modern TypeScript stack and signs PDF documents with PKCS#12 certificates following the PAdES standard. DocuSeal is written in Ruby, can run as a single container with SQLite and brings a more capable editor for form fields.

Which is easier to operate?

DocuSeal. One container with SQLite suffices for small installations, with no external database. Documenso expects more environment and offers a more thorough API in exchange.

Can I embed signing in my own applications?

Both offer APIs. Documenso clearly puts more weight on this and documents it more thoroughly. If signing should be a step in a larger workflow rather than a separate tool, that is the more important difference.

Does either replace DocuSign?

For the feature scope most companies actually use, yes. What is missing are edges such as identity verification by video, integrations into large contract management suites, and the qualified signature level without an additional provider.

Where are documents stored?

With both, on your infrastructure; that is the point of self-hosting. What needs settling is retention: signed documents often have to be held unchanged for years, and that is a question of backup, not of signing software.

What is the most common mistake on introduction?

The signature level is not clarified. A company introduces a solution, signs contracts with it for months and only later finds that part of them required a qualified signature. That check belongs before the selection.

What about long-term verifiability?

A signature is only verifiable as long as the certificate and methods used are considered trustworthy. For documents with long retention periods that belongs planned for, for instance through timestamps. Neither solution covers this fully on its own.

Documenso or DocuSeal: electronic signing on your own infrastructure

Timo Wevelsiep03.09.2026Updated: 12.10.2026

#Documenso
#DocuSeal
#eSignature
#eIDAS
#SelfHosted

Editorial note: The information in this article was compiled to the best of our knowledge at the time of publication. Technical details, prices, versions, licensing terms, and external content may change. Please verify the information provided independently, particularly before making business-critical or security-related decisions. This article does not replace individual professional, legal, or tax advice.

Sign contracts without letting documents leave the premises? WZ-IT sets up Documenso and DocuSeal on your infrastructure and provides managed hosting and operations. Try both as demo instances: DMS and e-signature selection · Free initial consultation

Electronic signing is one of the areas where moving from a cloud provider to your own solution is particularly obvious: it concerns contracts, precisely the documents you would rather not have sitting with a third party.

Two open-source solutions come into question. The comparison between them is quickly told. The more important question comes first and is regularly skipped: which signature level do your documents actually require?

All figures from the repositories, as of 3 September 2026.

The question before product choice: which signature level
The two at a glance
Documenso
DocuSeal
Which one for which situation
What self-hosting means
What a feature comparison does not answer
How we approach this at WZ-IT
Further guides

The question before product choice: which signature level

The eIDAS Regulation distinguishes three levels, and the choice between Documenso and DocuSeal only becomes relevant afterwards.

Level	What it requires	Both solutions?
Simple electronic signature	data used to sign	yes
Advanced electronic signature	unique attribution, sole control, detectability of later changes	yes, with the right configuration
Qualified electronic signature	additionally a qualified certificate from a trust service provider	no, that requires a provider

For the majority of business traffic the simple or advanced level suffices: quotes, orders, internal approvals, many contracts.

Where German law requires written form, for instance for the fixed term of an employment contract (Section 14(4) TzBfG), there is no way around a qualified signature or paper. Neither solution replaces the trust service provider for that. DocuSeal brokers qualified signatures as a paid add-on per signature, via a card reader or the signer's local certificate or via a connected trust service provider (DocuSeal QES, as of October 2026).

For guarantee (surety) declarations even a qualified signature is not enough: Section 766 BGB explicitly excludes the electronic form. An exception applies where the guarantee is a commercial transaction on the guarantor's side: then, under Section 350 HGB, the form requirement does not apply.

That is a legal question and not a product question. We do not provide legal advice on it, but we ask it before anything is introduced.

The two at a glance

Figures from the public repositories, as of 3 September 2026.

	DocuSeal	Documenso
GitHub stars	18,357	14,704
Licence	AGPL-3.0	AGPL-3.0
Foundation	Ruby	TypeScript, Next.js
Operation	single container, SQLite possible	more environment required
Focus	form editor, quick start	API, PAdES signatures

Both are under the same licence and actively developed. The difference lies not in openness but in orientation.

Documenso

Documenso is the developer-oriented option. Modern TypeScript stack, thoroughly documented API, and for the signature itself PKCS#12 certificates following the PAdES standard, the PDF-specific signature format.

Strength: where signing should be a step in a larger workflow, for instance triggered from a contract management system or an in-house application, Documenso is the better foundation. The cryptographic building blocks for verifiable signatures are present.

Limit: more environment to operate, a smaller feature set for assembling forms.

DocuSeal

DocuSeal is the application-oriented option. Runs as a single container, with SQLite and no external database for small installations, with a mature editor for form fields and workflows involving several signers.

Strength: the fastest route to a working signing process for people who prepare and send documents. For the case "we want contracts signed without building anything", it is the obvious choice.

Limit: less weight on the API where embedding into your own systems is the goal.

Which one for which situation

Starting point	Obvious choice	Reason
Prepare and send documents, no development planned	DocuSeal	mature editor, simplest operation
Signing as a step in your own application	Documenso	more thorough API, PAdES
Small installation, minimal operational effort wanted	DocuSeal	one container, SQLite suffices
Qualified signature required	neither alone	trust service provider needed
Unclear which level is required	settle that first	the answer determines whether the selection holds at all

What self-hosting means

The reason for self-hosting is usually that contracts should not leave the premises. Both achieve that. What comes with it:

Retention. Signed documents often have to be held unchanged for years. That is a question of backup and archiving, not of signing software. A signing service without a tested restore is a risk you take on in order to shed another.

Reachability. Signers are usually outside the organisation. The service therefore has to be reachable from outside, which makes it an exposed component, with everything that entails: updates, certificates, monitoring.

Deliverability. Signing workflows depend on email. A sender whose messages land in spam makes the whole process unusable. That belongs checked before introduction.

Long-term verifiability. A signature remains verifiable only as long as the methods used are considered trustworthy. For long retention periods that belongs planned for, for instance through timestamps. Neither solution covers this fully on its own.

What a feature comparison does not answer

Who owns the templates? Signing processes go stale like any other template. Without ownership, in two years people sign a version nobody has reviewed.

What happens on a failure mid-workflow? A half-signed document is an awkward state. How the solution handles it and whether workflows can be resumed belongs tested.

How do you get out again? Signed PDF documents are portable, which is the good news. Templates, workflows and signer assignments are not.

Where does the signed document end up? The signature solution is not an archive. How signatures, document management and retention work together is described in the guide Open source document management.

Still unsure which tool fits? The orientation workshop sorts out your requirements and delivers a prioritised topic list with a recommendation per topic. From €1,490 excl. VAT, remote.

How we approach this at WZ-IT

We ask about document types first and have the signature level clarified before a product is selected. More often than expected it turns out that part of the documents needs a qualified signature and part does not, and then the answer is a combination rather than a decision.

In product choice, who works with it decides. Where people prepare documents, we use DocuSeal. Where signing is a step in an application, Documenso.

Operations include archiving the signed documents with a tested restore. A contract that cannot be found after two years is worse than one that was never signed electronically.

Further guides

Documenso and DocuSeal - the solutions individually
Managed open source - setup and operation of open-source applications
Compliance in operations - evidence requirements and retention
Managed operations - backup, monitoring and restore

Unclear which signature level your documents require? We review the document types, classify the requirements and set up the fitting solution. Book a call