The most important dividing line is PowerPoint compatibility. ONLYOFFICE is built to work with Office-format documents. Slidev is built to author web-native developer presentations. Presenton is built to generate and refine decks with AI, with a self-hosted route available. That makes the right choice depend less on which interface looks most familiar and more on who must edit the finished deck, where data may be processed, and whether a presentation is a crafted document or a generated starting point.
ONLYOFFICE: the closest fit for normal PPTX work
For Windows users who routinely receive PowerPoint files and need to send them back, ONLYOFFICE Desktop Editors is the least disruptive of the three. It is open-source software under the AGPLv3 license, runs on Windows as well as Linux and macOS, supports PPTX, and does not require a constant internet connection for locally stored files.
Its presentation editor also covers a substantial set of familiar presentation functions: charts, tables, equations, SmartArt graphics, transitions, animations, and Slide Master are documented features. That matters because an office-suite replacement has to handle more than placing text and images on a blank slide. A team presentation may rely on a master layout; a sales deck may depend on charts; and an internal training deck may use animations and reusable assets. The documented feature list suggests ONLYOFFICE is aimed at that conventional PowerPoint-style workload rather than a stripped-down slide viewer.
There is also a local-AI angle. The editor’s AI capability can connect to LM Studio models in Desktop Editors version 9.0.4 or newer, including the Presentation editor. Its provider list also includes Ollama. For people who already run local models, that creates a way to use AI assistance without making a hosted provider the only possible path. It does not mean every AI-enabled configuration is local: hosted providers and custom providers are also available. Users should check the provider selected in their own installation before assuming presentation content stays on the PC or local network.
The key caveat is one that often gets lost in “PowerPoint alternative” recommendations. Support for opening, editing, and saving PPTX proves format support; it does not prove that every deck will make a perfect round trip. The available documentation does not establish pixel-perfect fidelity for advanced layouts, unusual fonts, macros, or complex animation behavior after a file is edited and returned to someone using PowerPoint.
That is not a reason to dismiss ONLYOFFICE. It is a reason to test it properly before committing a department or a client workflow. Open representative decks rather than a blank sample: a branded template, a chart-heavy report, a deck with dense typography, and one with transitions or embedded elements. Make edits, save a copy, then have a PowerPoint user inspect the returned PPTX. If the visual and editing results meet the team’s standard, ONLYOFFICE has a strong claim as the practical general-purpose alternative in this group.
Slidev: excellent for developer talks, weak as an editable PPTX handoff
Slidev has a very different premise. It is MIT-licensed and explicitly designed for developers. Slides are Markdown-based, with syntax highlighting and live code capabilities, LaTeX, Mermaid diagrams, drawing and annotation tools, phone-capable presenter control, and fast reloading powered by Vite.
That combination is compelling for engineering demos, technical workshops, API talks, and internal architecture briefings. Markdown makes slide content easier to keep in a source repository, review alongside code, and modify with a text editor. Live code and syntax highlighting make more sense in a developer presentation system than trying to force those workflows into a conventional office application. Mermaid support is particularly useful where diagrams are maintained as text rather than manually redrawn every time a system changes.
Slidev can be tried in a browser and can also be used locally. The local route, however, is not a normal office-suite installation: it requires Node.js 20.12 or newer. Its PDF, PPTX, and PNG export workflow also depends on Playwright Chromium. That is manageable for a developer already comfortable with Node tooling, but it is meaningful setup overhead for an office user who just wants to open a deck and start editing.
More importantly, Slidev’s PPTX export needs to be understood literally. It can create a PowerPoint file, but its own export documentation states that the slides in that file are exported as images, so slide text is not selectable. Interactive features may also be absent after export.
This makes Slidev’s PowerPoint export suitable for distribution where the recipient needs the visual slides in a .pptx container, not for collaboration where the recipient expects to revise text, rearrange native objects, or preserve web-driven behavior. Calling that an editable PowerPoint workflow would be misleading. A project manager receiving the deck may be able to present it, but not meaningfully revise it in the way they could a normally authored PowerPoint file.
The practical Windows recommendation is therefore narrow but positive: choose Slidev when the deck is part of a code-centric publishing workflow and the authoritative source is Markdown. Do not choose it primarily because a nontechnical colleague demands editable PowerPoint handoffs. In that scenario, the export limitation outweighs many of its strengths.
Presenton: self-hosted AI generation with important maturity questions
Presenton occupies a third category: AI-assisted deck generation. Its core project is Apache-2.0 licensed and offers both self-hosted web deployment and desktop applications. It can start from a prompt, an uploaded document, or a user’s PowerPoint design, then provides a drag-edit interface. The project describes its PPTX result as a fully editable deck.
For a Windows user or small organization, the appeal is clear. Instead of beginning with a blank slide, users can generate a draft, revise it visually, and export a presentation. Presenton supports Ollama, LM Studio, OpenAI-compatible endpoints, and multiple cloud providers. That gives administrators and technically capable users a choice: point it to local models when their environment supports that, or select a hosted service when convenience is more important than local execution.
That flexibility deserves a precise reading. Presenton is capable of using local models, but it is not inherently a local-only product. A deployment can be entirely different in privacy and data-handling terms depending on the model provider chosen. Organizations with policies around sensitive documents should confirm their actual provider configuration, networking, storage, and image-generation path rather than relying on “self-hosted” as a blanket answer.
Its template-from-PowerPoint workflow is promising, but the available record does not justify treating it as universally dependable. One report concerning Presenton 0.9.4-beta in Docker described a template-generation attempt that reached font selection and then failed with a gateway timeout. A single user report does not prove a general defect or identify its root cause. It does show that this particular workflow can fail in at least one reported beta environment.
There is a related historical complication around local processing. An April 2026 project issue said that generating a template from an existing PowerPoint then supported cloud AI providers rather than local Ollama vision models. The issue is marked fixed, but the available record does not identify the release containing the change or independently demonstrate the current implementation. It would be premature to promise that importing a branded PowerPoint will now work entirely offline with a local Ollama model in every setup.
An earlier report also said locally generated images were absent from exported PPTX and PDF files in version 0.8.0-beta. That issue is closed, which makes it evidence of a past limitation rather than proof of a current one. Still, it reinforces a sensible testing rule for generative presentation tools: do not assess success solely in the editor. Export the actual PPTX and PDF, inspect every image and layout, and open the deck in the software used by its recipients.
Presenton is therefore best treated as a potentially useful drafting and ideation tool, especially for people prepared to self-host and validate results. Its project materials advertise editable export, but organizations should verify that claim with their own templates, fonts, generated visuals, and delivery route before relying on it for a time-sensitive customer or executive presentation.
The licensing and deployment choices matter
All three projects are open source, but their licenses and operating models are not identical. ONLYOFFICE Desktop Editors uses AGPLv3; Slidev uses MIT; and Presenton’s core is Apache-2.0. For an individual Windows user, the visible difference may chiefly be which program fits their work. For an organization that modifies, redistributes, embeds, or self-hosts software, these distinctions can carry compliance consequences. Legal and IT teams should evaluate the relevant license obligations before integrating any of them into a commercial or managed workflow.
Deployment also changes the experience. ONLYOFFICE offers a conventional desktop-office model with offline work on local files. Slidev is a development-tool workflow that can run locally but expects a modern Node.js environment. Presenton provides desktop applications and self-hosting options, but its AI behavior depends on the chosen model provider and the reliability of the deployment.
In other words, “open source” does not by itself answer the questions Windows users actually face: Can I exchange this deck with a PowerPoint-only customer? Can a colleague edit the file? Does generation use a local model? Can I reproduce the same result on another PC? Each product requires a different answer.
A practical selection guide for Windows users
Choose ONLYOFFICE Presentation Editor first when PPTX is the working format, colleagues expect familiar office-style editing, and offline desktop use matters. Its documented presentation features and Office-format focus make it the most natural candidate for day-to-day slide work. Test round-trip files before using it for decks with demanding branding or advanced PowerPoint features.
Choose Slidev when the source of truth should be Markdown, presentation content belongs next to code, and the audience benefits from live code, LaTeX, or text-defined diagrams. It is a strong specialist tool, not a replacement for a native-object PowerPoint collaboration process. Its PPTX export is a presentation artifact, not an editable PowerPoint authoring format.
Choose Presenton when the goal is to accelerate first drafts with AI and there is appetite for a self-hosted or configurable model setup. Treat its claimed editable export and PowerPoint-template conversion as capabilities to validate in the exact version and environment being deployed. Beta-era reports show why a trial should include imports, exports, custom fonts, images, and the intended model provider.
No single tool here replaces every part of PowerPoint for every user. ONLYOFFICE is the closest conventional substitute; Slidev is the more compelling option for developer-authored talks; and Presenton is the more ambitious AI-generation route. The useful decision is not which one “wins” in the abstract, but which trade-off your Windows workflow can actually afford.