Knowledge Management & Notes
4.5/5.0
VerifiedFreeLast technical review:
Markdown for AI (.md)

Gamma PDF

Open-source, self-hosted PDF reader with outliner notes for researchers.

Pricing

$0/mo

Free
Score

4.5/5

License
AGPL-3.0
Last technical review
2026-11-14
Available plansVisit website (opens in a new tab)

Technical Overview

Gamma PDF is an open-source, self-hosted PDF annotation tool built for researchers. It allows users to highlight text, draw on documents, maintain outliner notes with live math and LaTeX, query local AI assistants, and search entire document libraries stored directly on their own hardware.

Analyst Evaluation: Pros and Limitations

Verified Advantages

  • Fully open-source software with zero licensing fees.
  • Self-hostable and local execution capabilities on desktop or via Docker.
  • Native integration with live math formulas and Markdown.

Technical Considerations

  • Lacks native real-time multi-user collaboration features out of the box.
  • Initial setup for self-hosted environments requires technical expertise.

Technical Capabilities & Features

2/7
Not available:REST & GraphQL API
Not available:SSO / SAML Authentication
Included:Self-Hosted Option
Included:Full Data Export
Not available:Role-Based Access Control (RBAC)
Not available:Custom Domains & SSL
Not available:Immutable Audit Logs
Scorecard
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Technical Scorecard: Gamma PDF

88/100
DX & Tech Documentation
Excellent
85/100
Pricing Fairness
Excellent
100/100
Security & Governance
Excellent
90/100
Data Portability & Sovereignty
Excellent
95/100
Performance & Reliability
Favorable
70/100

Time to Value & Fit by Segment: Gamma PDF

Estimated Time-to-Value< 1 hour (Immediate)

Near-instantaneous deployment with minimal technical friction.

Learning CurveModerate (Standard)

Requires consulting technical documentation and basic credentials setup.

Fit Index by Organization Size

Startup & Agile Teams1 to 50 members
90%
Mid-Market & Scaleup50 to 500 members
70%
Corporate Enterprise500+ members
50%
Pricing & TCO
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Pricing

$0.00/mo

Model: FREE.

Free Tier Verification:

  • No credit card required
  • Commercial use allowed
  • Unlimited usage with no expiration
  • No mandatory watermarks
Get Gamma PDF (opens in a new tab)
Total Cost of Ownership (TCO) Projection: Gamma PDF$0.00/mo
Deterministic cost estimation at 12 and 36 months based on team size, including SSO tax premiums and annual prepay discounts.
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Licensing Cost (1 to 100+ seats)
$0/forever
Unlimited team members with zero penalties
SSO Tax (SAML Enterprise)
$0no surcharge
No artificial security barriers
3-Year Investment (Software TCO)
$0total
operates under a zero-cost or open-source model. Licensing TCO is identical:
Usage Surcharges & Bill Shock Simulator: Gamma PDFWhat usage costs as you scale
Detect overage penalties before they impact engineering budget.
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Prototype / MVP (10 GB)

Included base quota in plan: 10 GB.
Low Risk / Predictable Bill
Base Monthly Rate
$0/mo
Fixed subscription or contracted tier
Overage Penalty
$0/month extra
Usage covered within plan quota
Estimated Monthly Invoice
$0/mo
Total monthly cost before taxes
Technical Mitigation Recommendation:

Suitable for development; verify concurrent connection limits.

Base Production (50 GB)

Included base quota in plan: 50 GB.
Low Risk / Predictable Bill
Base Monthly Rate
$0/mo
Fixed subscription or contracted tier
Overage Penalty
$0/month extra
Usage covered within plan quota
Estimated Monthly Invoice
$0/mo
Total monthly cost before taxes
Technical Mitigation Recommendation:

Implement table compression policies and temporal partitioning.

Active Growth (250 GB)

Included base quota in plan: 250 GB.
Low Risk / Predictable Bill
Base Monthly Rate
$0/mo
Fixed subscription or contracted tier
Overage Penalty
$0/month extra
Usage covered within plan quota
Estimated Monthly Invoice
$0/mo
Total monthly cost before taxes
Technical Mitigation Recommendation:

Offload cold backups to standard object storage (S3).

Large Scale (1.000 GB (1 TB))

Included base quota in plan: 1,000 GB.
Low Risk / Predictable Bill
Base Monthly Rate
$0/mo
Fixed subscription or contracted tier
Overage Penalty
$0/month extra
Usage covered within plan quota
Estimated Monthly Invoice
$0/mo
Total monthly cost before taxes
Technical Mitigation Recommendation:

Migrate to dedicated instance or self-hosted cluster to curtail I/O fees.

Security & Data Exit
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Compliance & Security Standards: Gamma PDF

SOC 2 Type IINot reported
ISO 27001Not reported
GDPR / RGPDNot reported
HIPAANot reported
PCI-DSSNot reported
Jurisdiction & Legal Sovereignty
🇺🇸United States [US]Immune to US CLOUD Act (EU Sovereign)DPA On Request
SSO Availability (SAML Enterprise)
No SSO Documented
Data Residency
SELF_HOSTED
AI Privacy Policy
Not evaluated
Data Liberation & Migration Runbook: Gamma PDFPG_DUMP · JSON · CSV
Actionable escape runbook and credential export guarantees to mitigate vendor lock-in.
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Supported Structured Export Formats
PG_DUMPJSONCSVPARQUET
Password Hash Portability
Exportable Hashes (Bcrypt / Argon2): Zero Forced Retention

Allows extracting password hashes in standard formats to migrate without forcing user resets.

CLI Command / Rescue Endpoint
docker exec -t gamma-pdf pg_dump -U postgres > backup.sql
Exit Protocol & Migration Notes

Direct database-level export without proprietary password encryption.

Deployment & Infrastructure Requirements: Gamma PDFAGPL-3.0
Hardware specs and Docker directives to run on local servers, dedicated VPS, or Kubernetes without telemetry leak to the cloud.
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Minimum Memory1 GB RAM (Recommended)
Compute CPU1 vCPU
Runtime / LanguagePython
Code LicenseAGPL-3.0
Docker CLI Directive
docker run -d --name gamma-pdf -p 8080:8080 gamma-pdf:latest
Companion Services & Dependencies:
PostgreSQL 15+Redis 7+
Community & Repository
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Technical Reputation of Gamma PDF

85/100 Technical Trust

Frequent Praises in Production

  • Fully open-source software with zero licensing fees.
  • Self-hostable and local execution capabilities on desktop or via Docker.
  • Native integration with live math formulas and Markdown.

Reported Production Frictions

  • Lacks native real-time multi-user collaboration features out of the box.
  • Initial setup for self-hosted environments requires technical expertise.
Commercial Treatment & Vendor Lock-in:1-Click Cancellation

Immediate cancellation from account settings without phone calls or forced retention.

Open source repository activity: Gamma PDF37
Stars, forks and release cadence
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Stars37
Forks5
Open Issues5
SPDX LicenseAGPL-3.0
Latest Commit DetectedNov 14, 2026

Frequently Asked Technical Questions (Gamma PDF)

How do I install and deploy Gamma PDF locally?

Gamma PDF is available as a native desktop application for Windows, macOS, and Linux, or can be deployed via Docker containers on a private server.

Is Gamma PDF completely free to use?

Yes, being an open-source and self-hosted solution, its core usage is completely free with no subscription fees or licensing costs.

Where are my documents and library data stored?

All documents, highlights, and outliner notes are stored locally on your own disk or private server, ensuring complete data privacy.

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