Documenso or DocuSeal: electronic signing on your own infrastructure
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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.
Table of contents
- 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 certain guarantees or fixed-term employment contracts, there is no way around a qualified signature or paper. Neither solution replaces the trust service provider for that.
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.
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
Sources
Electronic signatures in house
We set up a signing solution on your infrastructure, connect it to your systems and take on operations.
Frequently Asked Questions
Answers to important questions about this topic
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.
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.
In practice the majority of business traffic: quotes, orders, internal approvals, many contracts. Written-form requirements under German law, for instance for guarantees or fixed-term employment contracts, call for the qualified level or paper. That is a legal question, not a product question.
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.
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.
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.
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.
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.
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.
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.
Written by
Timo Wevelsiep
Co-Founder & CEO
Co-Founder of WZ-IT. Specialized in cloud infrastructure, open-source platforms and managed services for SMEs and enterprise clients worldwide.
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