Prepare documents, request signatures and track their completion.
Free and open source (AGPL-3.0 licence per GitHub).

Notes, tasks & docs
Prepare digital forms, collect signatures and manage signed documents.
Prepare digital forms, collect signatures and manage signed documents.
Prepare existing PDFs, place fields, collect multiple signatures and retain completed documents. Cloud Basic is free with 10 signature-request emails/month. The AGPL-3.0 self-hosted manual-signing core is free; server, storage, backups and SMTP delivery can cost extra. No model API is required. Production API/embedding requires paid Pro plus usage fees; branding, automatic reminders and advanced integrations are paid. Not full enterprise automation or every signature/identity requirement.
Prepare existing PDFs, place fields, collect multiple signatures and retain completed documents. Cloud Basic is free with 10 signature-request emails/month. The AGPL-3.0 self-hosted manual-signing core is free; server, storage, backups and SMTP delivery can cost extra. No model API is required. Production API/embedding requires paid Pro plus usage fees; branding, automatic reminders and advanced integrations are paid. Not full enterprise automation or every signature/identity requirement. Production API/embedding: Pro $20/user/month plus $0.20 per completed document; sandbox access is not a free production API.
Each comparison covers the workflow described above, rather than every paid feature.