BoldSign is an API-first e-signature platform from US software company Syncfusion, offering 5 free documents per month and SDKs for 6 languages to help developers and businesses embed signing and enable bulk signing.
phpList is an open-source mailing list and email marketing manager launched in 2000, self-hosted on PHP + MySQL with full data control and support for large subscriber lists.
SignWell (formerly Docsketch) is a Canada-based lightweight e-signature platform with a free plan of 3 documents per month, Pro from about $25/month, offering templates, bulk sending, API, and audit trails for SMBs and individuals.
Dropbox Sign (formerly HelloSign, founded 2010 in San Francisco, acquired by Dropbox in 2019) is a lightweight e-signature platform with drag-and-drop signing, template bulk sending, and native Dropbox integration.