Penpact

At a glance

• Editor score
  5.6 / 10
• Pricing
  Free plan
• Best for
  Developers seeking open-source API signing
• Free plan
  Yes
• Paid from
  $19/mo
• Signing methods
  both
• Facts checked
  26 Sep 2026

• Where it wins

  • Create and send signature envelopes through an API or embedded signing flow
  • Typed TypeScript SDK, templates, webhooks, and bulk sending
  • Self-host under AGPL-3.0 or use the managed cloud

• Where it doesn't

  • The API is in early development and is not yet stable
  • Managed-cloud paid tiers are described as coming
  • Self-hosting requires running the service on your own infrastructure

Our verdict on Penpact

Penpact gives developers an e-signature API for adding document signing to their own products. It can create envelopes, upload PDFs, place signature and other fields, then send a signing link or show an embedded signing flow. The intended audience is teams that want to integrate signing rather than adopt a standalone signing workspace. Its TypeScript SDK, embeddable React component, and self-hosting option make it especially relevant to product developers who want control over the signing experience and deployment.

The API covers a broad signing workflow: templates and document merge, bulk sending, reminders, conditional fields, webhooks, and AI-assisted detection for signature, date, and name fields. Completed PDFs receive a PAdES digital seal, append-only audit trail, and Certificate of Completion. The Free plan includes embedding, themes, sandbox mode, SDK, webhooks, templates, and AI detection with the user's own key. Pro is listed at $19 per month and adds bulk send, reminders, conditional fields, managed AI detection, email support, and removal of Penpact attribution. Scale is usage-based at $0.12 per signed document and adds unlimited team members, audit-log export, and priority support; Enterprise adds signing certificates, SSO/SAML, SCIM, SLA, dedicated support, and compliance assistance.

Deployment choice is a central consideration. Self-host is listed as a one-time $0 option under AGPL-3.0, with unlimited documents on the user's own infrastructure; managed cloud is also available. The vendor describes the API as early development and not yet stable, and says managed-cloud access is currently free during early access while paid tiers are coming. That makes Penpact a fit for developers comfortable evaluating an evolving API or operating open-source software, not teams that need a stable signing system today. Buyers requiring a mature, production-ready API should consider alternatives until Penpact's stability improves.

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Penpact pricing

All 5 Penpact plans and prices →

Penpact fact sheet

Alternatives to Penpact

• DocuSign eSignatureA broad e-signature platform with flexible workflows, integrations, and a limited free account.9.4
• Adobe Acrobat SignA mature signing service with flexible workflows and a strong fit for Adobe and Microsoft environments.9.2
• Zoho SignElectronic signing with broad integrations and options from free access to custom workflows.9.1

See all Penpact alternatives →

Featured on iTechGuides

Penpact is listed in our Digital Transaction Management Software directory. Add the badge to your site — it links back to this page.

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Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

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Last updated 21 Oct 2026 · How we research and update