Hello everyone,

One of the most common hidden costs for SaaS companies as they scale is PDF generation. Paying per-document to commercial APIs can easily cost a growing startup $300–$500 per month, or roughly $4,000 per year.

To solve this, I built GoPdfSuit. It is an MIT-licensed, self-hostable PDF service designed to give you professional-grade generation without the "SaaS tax" or vendor lock-in.

Why Self-Host?

Most commercial PDF libraries are either expensive or difficult to manage at scale. By self-hosting GoPdfSuit, you gain:

• Zero Variable Costs: No per-document fees.
• Data Privacy: Keep sensitive user data within your own infrastructure (crucial for HIPAA/GDPR compliance).
• High Throughput: Built in Go, it handles 300-500 requests per second (the underlying engine supports up to 1,700 ops/sec).

Core Capabilities

• Template-Based Workflow: Define layouts using JSON templates with support for automatic page breaks and multi-page documents.
• Low-Code Builder: Includes a React-based drag-and-drop builder for designing templates visually.
• Advanced Features: PDF merging, form filling, digital signatures, and redaction.
• Mathematical Rendering: Support for Typst syntax for high-quality math equations.
• Developer Friendly: Native Python bindings and a Go client library are included.

Comparison and Performance

While many tools rely on heavy headless browser instances for HTML-to-PDF conversion (which are resource-intensive), GoPdfSuit is optimized for performance. It supports HTML conversion when needed, but its core JSON-to-PDF engine is significantly faster and more predictable for high-volume billing or reporting.

Resources

• GitHub Repository: https://github.com/chinmay-sawant/gopdfsuit
• Documentation & Live Editor: https://chinmay-sawant.github.io/gopdfsuit/
• Introduction Video: https://www.youtube.com/watch?v=PAyuag_xPRQ

If your SaaS is currently spending a significant portion of its infrastructure budget on PDF APIs, I’d love to hear about your use case and see if GoPdfSuit can help you bring those costs down to zero.

I am open to any feedback on the implementation or feature requests that would make it easier for you to switch from a paid provider.