Stirling PDF review
A broad PDF toolkit for privacy-focused automation, with limited form creation.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Stirling PDF is an open-source PDF platform for individuals, teams, and organizations that need editing, annotation, OCR, conversion, signing, redaction, compression, and page-management tools. It runs in a browser, on Windows, macOS, and Linux, or on self-hosted infrastructure. An API and PDF pipelines support automated processing, while the product also includes AI features and integrations with services such as Google Drive, Slack, Box, Dropbox, Jira, Salesforce, Notion, Zapier, and HubSpot.
The Free plan includes 60+ PDF tools, web, desktop, and self-hosted access, 500 monthly credits, and the product’s private, open-source positioning. The $99-per-month Team plan adds single sign-on, team workspaces and invites, central control of the tool catalog and editor deployment, and one bill instead of per-seat licenses. Higher-tier options include self-hosted deployment, OAuth2 SSO, Google Drive integration, air-gapped deployment, SCIM provisioning, data residency, audit logs, uptime SLAs, custom agreements, and invoicing. PDF Processor uses prepaid or usage-based billing for credit-based PDF processing.
Its strongest fit is for organizations that want broad PDF operations under their own infrastructure, with privacy and automation treated as core requirements. Stirling PDF can edit existing text and images, OCR scanned documents, convert PDFs to and from 50+ formats, apply manual or pattern-based redaction, fill existing interactive fields, and apply certificate-based digital signatures. The main boundary is form work: it fills existing fields but does not add new ones. Teams seeking self-hosting, API access, and workflow integrations should find a substantial match, while buyers focused on building new PDF forms or needing only a small set of basic editing tools should consider a more specialized alternative.
Stirling PDF pros and cons
- Where it wins
- Self-hosted, desktop, web, API, and pipeline options
- OCR, redaction, signing, conversion, and 60+ PDF tools
- Open-source with integrations across storage and work platforms
- Where it doesn't
- Does not create new PDF form fields
- Team costs $99 per month
- Broad functionality may exceed simple editing needs
Stirling PDF fact sheet, pricing and score →
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