Plain vs Gamma in 2026 — an honest comparison from someone who used both

I used Gamma seriously for three months in late 2025 — building client pitches, internal updates, a couple of investor decks. Then I started building Plain. So when someone asks "is Plain a Gamma alternative?", I want to answer it honestly, not as marketing copy.

The short answer: they're not the same shape of product. Gamma is the best AI tool I've used for generating a polished .pptx file. Plain isn't trying to do that. Plain is trying to make a deck that you never download — that you send as a link. If that distinction matters to you, you might want Plain. If it doesn't, Gamma is excellent at what it does.

Here's the long answer.

What Gamma is great at

Let me put this up front, because the rest of this post will focus on places they diverge. Gamma gets four things very right:

1. Generated decks look good out of the box. Typography, spacing, accent color — Gamma's design ceiling is high. You get something presentable on the first generation.
2. The card model is intuitive. Each slide is a card; you can drag, edit, delete, regenerate per-card. The mental model is "I'm working with cards" and it never gets in your way.
3. Smart blocks save real time. Drop in a chart block, paste data, done. Drop in an image block, type a description, done. The mid-tier polish is mostly automated.
4. The team has shipped fast. Gamma went from quirky to category-defining in eighteen months. That's hard.

If you want one sentence summary of Gamma: "AI generates a good .pptx, and you don't have to learn PowerPoint to edit it." That's a real, important thing.

Plain is taking a different bet.

The artifact question

Here is the one decision that changes everything. When you finish a deck in Gamma, what do you do with it?

You export. You download pitch-v3.pptx. You attach it to email. Your client opens it. Maybe a font is missing on their machine. Maybe the chart became an image. Maybe they want you to change slide 4. You re-edit in Gamma, re-export, re-attach, re-send. Now you have pitch-v3-final-FINAL2.pptx living on two laptops and three email accounts.

Gamma does have an internal share link, and they've gotten better at this. But the gravitational pull of the product is still toward "AI helps you produce a file." The end state of the work is a download. You can tell, because every demo and tutorial ends with "and then you can export to PowerPoint."

Plain's bet is different. The end state of the work is inplain.app/s/xxxxx. Open on any device, always the latest, edit one number and the link doesn't change. We export to .pptx, .docx, and .xlsx too — but those are fallbacks for clients who can't open a link, not the primary artifact. You can download a real sample of what our .pptx looks like — the export works, but it's not where the product lives.

That single difference cascades into everything else.

Where they diverge — side by side

Here's a table. I tried to be fair. Tell me if anything's wrong; I'll update it.

Notice the table is mostly a long list of small differences. That's deliberate. Neither product has a "killer feature" the other lacks. They have different center-of-gravity. Gamma's center is "the deck." Plain's center is "the link." Everything else follows.

When Gamma is the right call

Be honest about your workflow. If most of these describe you, Gamma is probably the better tool:

• You make decks to send as files. Your clients live in PowerPoint or Keynote. They re-edit your deck on their side. The whole loop is file-based.
• You work mostly on slides — not long-form docs, not data dashboards. You want a focused product, not a suite.
• You like the card-based direct manipulation UX. You think "click this slide, change this thing" rather than "tell the AI to change something."
• You don't need version history beyond the occasional undo. You don't have an AI agent that should be able to call your document tool.

For these workflows Gamma is faster, more polished, and the whole industry of "AI deck plugins" lives there. Stay.

When Plain is the right call

Plain works better if most of these describe you:

• You ship work as links. Your audience is happy to open a URL — startup investors, internal teams, modern B2B clients, anyone who lives in Slack and email rather than a file system.
• You want to make decks and docs and dashboards from the same input. A weekly business update that generates a deck for the meeting, a doc for the wiki, and a dashboard for the CSV — all from one Markdown source.
• You want to edit by telling the AI what to change, not by clicking around slides. You'd rather say "in the third slide change the headline" than open slide 3 and triple-click.
• You want every edit to be diffable. Every change is a JSON-Patch you can review, roll back, or branch from. AI changed something you didn't ask for? Undo to that exact patch, not to "five minutes ago."
• You live in Claude Code / Cursor / Codex. You want plain.share() to be a tool your agent can call mid-task, so the document gets made and shipped without you leaving the terminal.
• You sometimes work offline (Tauri desktop), or batch-generate in CI (CLI). You want all three surfaces to share the same source.

The "but the .pptx export is worse" question

I want to address this directly. Gamma's .pptx export quality is better than ours. Period. They've invested more engineering into making the file format conversion beautiful, and it shows. When we export to .pptx we accept that some animations are lost, some custom positioning may shift, and embedded video becomes a thumbnail.

We accept those degradations on purpose. Plain's primary artifact is the link, where animations work, video plays, layout is exact. The .pptx is a fallback for the receiver who physically can't open a link. We make sure the fallback is clean — fonts intact, structure preserved, charts editable, no squashed tables — but we don't optimize the fallback as if it were the product.

If the .pptx is your product, this is the wrong tradeoff. Use Gamma.

What "open source" actually means here

I've seen "Gamma open source alternative" as a search query, so let me be careful about this. Plain's renderer is open source — github.com/io-oi-ai/Plain. That's the part that takes Markdown + Plain DSL and produces the HTML you see. You can vendor it, fork it, study how the Dune-style dashboard layout works.

Plain's gateway is not open. The gateway is what makes "type one sentence → get back a working deck" economically viable; it routes between models, handles caching, absorbs the AI costs against the subscription. Open-sourcing it would mean either everyone pays for their own API keys (BYOK — we don't do this, because it makes the product worse for 95% of users) or we'd burn AI credits with no business model.

Gamma is not open source in either sense. Their renderer is proprietary, their model routing is proprietary. That's not a criticism — it's the standard model. But if "I can read the renderer code" matters to you, Plain is more open than Gamma. Just not all the way open, and I'd rather be precise about that than pretend.

What about price

Gamma's paid tier is $15 / month at the time of writing. Plain Pro is $20 / month. So Plain is more expensive on the surface.

But the unit of measure isn't the same. Gamma sells you AI credits sized for deck generation. Plain Pro gets you 1,200 credits that cover deck plus doc plus sheet generation, editing, exports across all three, MCP calls, shared links — anything that hits the AI gateway.

If you're going to use Plain only for decks, the value-per-dollar is on Gamma's side and you should pick Gamma. If you'd use Plain for the whole suite — generating a quarterly review doc, a board dashboard, and a customer pitch deck from related source material — Plain is better value because you'd otherwise need three subscriptions.

Both have generous-enough free tiers to test the actual tradeoff. Gamma: 400 credits at signup. Plain: 200 credits / month, recurring, no credit card. See Plain pricing if you want the full table.

A test you can run today

If you can't decide, here's a test that takes thirty minutes and will tell you more than any blog post.

1. Generate the same deck on both — a 5-page pitch on something you actually need to pitch.
2. On Gamma: export .pptx, send it to one colleague. On Plain: copy the share link, send it to the same colleague.
3. Ask the colleague: "change the headline on slide 3."
4. Make the change. Re-send.

Time both round-trips. If Gamma's round-trip is fine for your workflow, stay. If Plain's "just refresh the page" is meaningfully better, switch — that small delta is the entire product difference, applied over hundreds of edits a year.

What I'd tell a friend

If a friend asked me "should I pay for Gamma or pay for Plain in 2026?", I'd ask them one question:

Do your recipients work in files, or in links?

If files: Gamma. It's the cleanest "AI makes me a clean.pptx fast" tool out there. I genuinely admire what they've built.

If links: Plain. We're betting the whole company on the idea that in the AI era, the artifact of work shifts from file to link. That bet might be wrong. But if you already believe it, Plain is the tool built around that belief from the ground up.

I'd rather have ten thousand users for whom Plain is obviously right than a million users for whom it's just "a different Gamma."

Plain is free for 200 credits / month. No credit card. Try the deck generator at inplain.app, or read the manifesto if you want the long version. If you want the technical side, we wrote about why every edit in Plain is git-style diffable and why we think documents should be links. If you want Plain inside Claude Code / Cursor, the MCP server takes thirty seconds.