Open source / Docusign eSignature

Open-source alternatives to Docusign eSignature

Documenso is open source: free to download and run on your own server. Docusign eSignature costs from $11 a month.

Documenso

Open source (AGPL-3.0) · Open-source document signing, an alternative to Docusign

Documenso sends documents for electronic signature. Because it is open source, you can self-host it and check how signing works.

Free to download and run on your own server under the AGPL-3.0 licence; you pay only for your hosting.

Free to use, not free to run. The licence costs nothing, but self-hosting needs a server (often $5 to $40 a month) and someone to install updates and keep backups.
Open core means the main product is open source but some features, usually for larger teams, need a paid licence.
Hosted versions exist for many of these, run by the makers. They cost money but save the upkeep, and you can still move to your own server later.
Licences differ. MIT and Apache allow almost anything. GPL and AGPL require you to share changes you make to the code; for normal business use, that rarely matters.