Gamma alternatives: seven ways to make a deck you can still edit

Which Gamma this page is about

Gamma's core idea is a card: a block of content that lives in a browser and can grow to fit what you put in it. That is why the same tool makes a deck, a doc, a one-page site, and a social post from one editor. It is also the single design decision that explains most of what follows — the credit meter is priced per slide and per image because generation is incremental, and the PowerPoint export has to translate a flexible web card into a fixed 16:9 rectangle.

Seven Gamma alternatives, compared on what you keep

Price and what the plan actually gates

Two entries need a caveat. Genspark ships an AI slide generator inside a very broad workspace, but its pricing page redirects to a sign-in, so we will not quote a plan price we could not read; the Genspark comparison covers that workspace on its own terms. Tome is the name most "best Gamma alternative" listicles still carry, and it should be struck from yours: tome.app returns a 404. Its presentation product is gone. If a roundup recommends it, that roundup was not checked.

Gamma's full ladder, for reference

What a Gamma credit actually buys

The meter is per slide and per image

Gamma's help centre is unusually clear about this, and it is the part most comparison pages get wrong. Credits are consumed by generating with Create with AI, metered per slide and per image, and also by the editing actions people treat as free: asking the Agent to rewrite a card, adding cards, and trying new layouts.

“Unused credits rollover up to double the plan size.”

Gamma Help Center, How do credits work in Gamma?

Gamma also says the cost of an action varies with what you are doing, which AI model is used, and the length or complexity of the generation. That is honest, and it is also why a per-deck estimate from a third-party blog is worth very little. The practical consequences are simpler than the arithmetic:

• Free credits do not refresh. The 400 you get at signup are the 400 you have, unless you earn more or upgrade.
• Iteration is the expensive part. A first draft is one generation; the six rounds of "make this card shorter" are six more meter events.
• Rollover caps at 2×. A quiet month does not bank indefinitely against a busy one.

Compare that with how the alternatives meter. Beautiful.ai puts unlimited AI content generation inside its Pro plan, so revising does not draw down a balance. Google Slides with Gemini has no deck-level credit at all — you pay for the Workspace seat. Pitch and Canva both meter AI, but Pitch's 500 monthly credits are shared across the whole team, which is a very different shape from Gamma's per-seat pool.

The PowerPoint export question, answered fairly

Gamma's export is better than its reputation

"Gamma exports break" is the most-repeated claim in this category, and a lot of it is out of date. Gamma's own documentation says tables export as real, editable tables — on by default for every user on every plan — and that your theme's fonts, including custom uploads, are embedded directly into the .pptx so text displays correctly without installing anything. Free exports carry a "Made with Gamma" badge; paid plans remove it.

What genuinely does not survive

Gamma names its own fallbacks, which is more than most vendors do. PowerPoint has no rounded corners on tables, so editable tables come out with sharp ones. Gradient headings may render differently or collapse to a single colour. Advanced treatments such as frosted overlays fall back to substitute styles. None of that is a scandal; all of it is the cost of translating a browser rendering into an Office file format.

The deeper mismatch is geometry. A Gamma card is a web container that grows with its content. A PowerPoint slide is a fixed rectangle. Gamma's page-setup guidance tells you to select a fixed height option when the destination is a PowerPoint slide — which is exactly the setting a first-time user has not touched before their first export goes sideways.

How OpenCraft builds a deck: no conversion step

The PowerPoint is the build target

OpenCraft does not render a deck to the screen and then convert it. Slides go through the same sandbox that runs any other code job. The active slides skill mounts helper libraries and craft guidance, the model writes an actual Python program against python-pptx, and the job returns three things: the .pptx, a PDF that LibreOffice rendered from that exact file, and a private Poppler contact sheet of the pages so the model can look at its own output.

That last part is the loop that matters. A turn runs several jobs — build, QA-render, fix — so a chart with an unreadable axis or a label that wraps badly can be caught and rebuilt before you ever see it. The pitch-deck walkthrough publishes a real run including the defect that survived it, which is a better test of this claim than any screenshot.

Validation runs before anything is published

A deterministic gate inspects the package before upload and rejects negative chart axis ids and empty cached chart series — two failure modes that produce a file PowerPoint opens and then quietly renders wrong. A failed render or a failed validation fails the whole job rather than publishing a half-built artifact. Office files get a 32MB per-file cap.

Images are generated in the same turn

Because the sandbox workspace persists across turns and every delivered file is indexed by name, an image the model generates at step three is on disk and addressable when the deck program runs at step seven. There is no separate asset upload dance. The same thread holds your source material, the research, the images, and the build script.

Two consequences follow. First, the deck preview cannot drift from the deliverable, because the PDF you review was rendered from the PowerPoint you download — one implementation, not two. Second, you can switch models mid-thread without losing context; check the current options in the OpenCraft model directory.

The honest limits

OpenCraft has no template marketplace, no real-time multi-user editing, no brand-guardrail enforcement engine, no custom domains, no per-viewer analytics, and no drag-and-drop slide canvas. You describe what you want and correct the file. If your workflow is "generate, then nudge things around in a browser for twenty minutes," Gamma is genuinely faster at that and it is not close.

When Gamma is the better choice

Gamma is a well-made, purpose-built product, and there are jobs where swapping it out would be a downgrade:

• The deck lives on the web. Gamma's natural output is a shareable page, with up to 10 custom domains on Pro and 100 on Ultra, plus detailed per-viewer analytics. A downloadable .pptx is a worse artifact for that job, not a better one.
• You want to edit visually. Themes, layout variations, and card restyling in the browser are fast and pleasant. Iterating by prompt is not the same experience.
• A team edits together. Team and Business plans add shared folders, a custom company theme, admin controls, SSO on Business, and SOC 2 documentation on request.
• You are restyling an existing deck. Gamma imports PDF and PPTX to enrich, which is a genuinely useful front door.
• One tool for decks, docs, sites, and social. The card model pays off here. OpenCraft makes those as separate artifacts; Gamma makes them as one document type.
• You need a deck in ten minutes and have never used either. Gamma's free tier plus a template will get you there faster.

How to choose in one pass

Ask what happens to the deck after the AI stops. That single question sorts this category better than any feature grid.

• It gets shared as a link and tracked — stay on Gamma.
• It gets restyled by a designer in PowerPoint or Google Slides — pick the tool whose output is a real slide file: Pitch on a paid tier, Google Slides, or OpenCraft.
• It must obey a strict brand system — Canva or Beautiful.ai, which enforce brand kits and auto-layout rather than hoping the prompt holds.
• The hard part is the argument and the evidence — OpenCraft, then hand the .pptx to whoever owns the visuals.
• You make two decks a year — a free tier or a no-seat tool. A $216 annual seat for two decks is a bad trade regardless of how good the product is.

Whichever way you go, run one real deck end to end before committing. Generate it, revise it six times, export it, and open the export in the software your audience actually uses. That test costs an hour and answers more than this page can. Then browse the other OpenCraft comparisons if the same question applies to the rest of your stack.