Presenton
Open-Source AI Presentation Generator and API (Gamma, Beautiful AI, Decktopus Alternative)
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What is Presenton?
Presenton is an open-source AI presentation generator that creates pixel-perfect slide decks from prompts, documents, or JSON. It stands out from cloud-based tools like Gamma by offering complete customization through custom PPTX templates and built-in presentation automation features. The tool preserves your brand's colors, typography, spacing, and layout so every slide stays on-brand.
Key features include reusable PPTX design conversion (turn existing presentations into AI templates), AI presentation generation end-to-end from structure to content, advanced editing with slide variants, a clean REST API for programmatic access, support for multiple LLMs (OpenAI, Google Gemini, Ollama), export to both PPTX and PDF formats, global theming for brand consistency, and the ability to run completely offline with Ollama. The platform supports charts, tables, and images when specified during template creation.
Presenton serves developers who need to embed presentation generation in their apps via API, enterprise teams requiring data privacy and compliance through self-hosting, financial services generating hundreds of compliant client reports weekly, SaaS companies offering white-label presentation generation to customers, and anyone wanting free local presentation generation without vendor lock-in or data tracking.
Presenton pricing
Pricing model: Freemium
Presenton offers a free self-hosted option that runs completely locally with Docker and Ollama at no cost. The managed cloud version uses an AI credit system where presentation generation consumes credits (e.g., 5 credits for a 5-slide presentation). API keys are created from the account page with format sk-presenton-xxxxx. Custom deployments and integrations require contacting [email protected]. No hidden costs are mentioned for the open-source version, and the cloud pricing details beyond the credit system are not explicitly stated on the website.
Presenton pros
- Open-source under Apache 2.0 license with no vendor lock-in
- Self-hostable with single Docker command for complete data control
- Reusable PPTX templates preserve colors, typography, and layout
- Clean REST API for programmatic presentation generation
- Supports OpenAI, Google Gemini, and local Ollama models
- Export to both PPTX and PDF formats
- PPTX exports remain fully editable in PowerPoint and Google Slides
- Can run completely offline with Ollama and GPU acceleration
- No data tracking - your data not used to train models
- Global theming for consistent brand application across presentations
- Advanced editing with slide variants and targeted generation
- Built-in AI template converter for existing PPTX/PDF files
- Supports charts, tables, and images in presentations
- Managed cloud option available for teams wanting no ops required
- White-label integration capability for SaaS companies
Presenton cons
- Template processing takes about 5 minutes per slide
- GPT-5 only available via OpenAI API, not OpenRouter or other providers
- Requires Docker installed for self-hosting
- No elaborate editing tools that professional designers typically expect
- Prompt-based designer interface may limit fine-grained design control
- Custom fonts must be manually uploaded if not open-source Google Fonts
- Charts, tables, and images must be specified during template creation
- AI editing of content consumes AI credits on cloud version
Frequently asked questions about Presenton
What is Presenton?
Presenton is an open-source AI presentation generator that stands out from typical slide tools through its complete customization capabilities using custom templates and built-in presentation automation features. It runs entirely on your local machine or can be used via managed cloud, offering complete ownership of your data and full control over how presentations are generated.
Who is Presenton for?
Presenton serves both developers and teams. Developers can embed generation with a clean API and integrate in minutes. Enterprise teams use it for compliant, on-brand presentations with full data control. Financial services generate hundreds of client reports weekly, SaaS companies offer white-label presentation generation, and anyone wanting free local generation without data tracking can use it.
What file formats can I export to?
Presentations can be exported to both PPTX and PDF formats. The PPTX format maintains full editability with standard tools like Microsoft PowerPoint and Google Slides, allowing you to make further manual edits after AI generation.
How do I create reusable templates from my existing presentations?
You can use the built-in AI template converter to transform existing PPTX or PDF files into reusable templates. On the Upload page, click Create Template, upload your PPTX file, and click Process File. Processing takes about 5 minutes per slide to generate layouts. You can then refine layouts and save as a template with a name and description.
Are charts, tables, and images supported?
Yes, charts, tables, and images are supported, but they need to be specified during the template creation process. When you create your template layout, you define where these elements should appear.
Does Presenton support global theming for brand consistency?
Yes, Presenton supports global theming, allowing you to create a brand theme and apply it consistently across all presentations. This ensures all your decks maintain your company's visual identity.
Is my data used to train AI models?
No, your data is not used to train any models. Presenton complies with European Union regulations including GDPR, and there is no data tracking.
Which LLM providers does Presenton support?
Presenton supports multiple large language models including OpenAI, Google Gemini, and Ollama for local/offline generation. When using Ollama, you can enjoy GPU-accelerated, fully offline generation with open-source models. Note that GPT-5 is only available via the OpenAI API.
How do I get API access and what's the authentication format?
Log in to Presenton and create an API key from your account page at presenton.ai/api-key. Your key will look like sk-presenton-xxxxx. Include this key in every API request using the Authorization header as: Authorization: Bearer sk-presenton-xxxxx. The main endpoint is POST /api/v1/ppt/presentation/generate.