[Verified] Napkin AI's free 500-credit weekly limit: enough for sketches, but paid plans start at US$9/month

Napkin AI converts text and documents into diagrams, flowcharts, and infographics with one prompt. The free tier gives you 500 AI credits per week—sounds generous until you actually need the tool consistently. A single credit buys one AI-generated diagram. When that runs out, you wait. We checked whether 500 is genuinely enough, and when the jump to paid plans makes financial sense.

What the free tier actually covers

The free tier allocates 500 AI credits per week, resetting on a fixed schedule. Each credit generates one diagram from your input. You also get unlimited visual editing (tweaking layouts, colors, text), unlimited file imports (PowerPoint, Word, PDF, HTML, Markdown), and unlimited PNG or PDF exports—but with a catch: Napkin’s watermark appears on every export. That branding is removed only on paid plans.

The editing and export tools have no quota. Once you generate a diagram (spending one credit), you can rework it endlessly and download it in any supported format without eating more credits. This matters: if you’re fine-tuning a single diagram across five iterations, you burn only one credit, not five.

What’s not included: SVG export (a vector format that scales infinitely without quality loss), PPT direct export (useful for slide deck integration), custom fonts, and brand customization. These live behind the paywall.

When 500 weekly credits runs out in practice

If you’re creating one or two diagrams daily, five days a week, you’ll use 10–15 credits and sit comfortably under the limit. But if you work in content, design, or data roles where diagrams are daily deliverables, 500 credits can evaporate in three days.

Once depleted, generation halts entirely. Napkin doesn’t queue requests or offer overage pricing. You simply cannot generate new diagrams until the week resets. This hard cap frustrates teams mid-project: there’s no escape hatch except waiting or paying.

The free tier also has no fine-grained usage dashboard in the published details. You don’t get alerts at 80% of your quota or a countdown timer. You hit the wall and discover it the hard way.

Paid plans flip the cost structure sharply

Plus costs US$9 per month, billed per user. You receive 10,000 AI credits monthly—that’s 20× the free weekly allotment. Added features: unlimited PPT and SVG export, three brand style templates, and watermark removal. The math: 10,000 credits across roughly 21 working days is roughly 475 credits per day. One diagram per working hour uses a fraction of that.

Pro costs US$22 per month, per user. That’s 30,000 credits monthly (3× Plus), plus custom design styles, unlimited brand customization, and the ability to upload your own fonts. At 30,000 monthly, you’re looking at roughly 1,400 credits per day on a 21-working-day schedule—overkill for individual creators, realistic for small teams or automated pipelines.

Both plans are per-seat subscriptions. If three people on your team use Napkin, you pay three times the monthly fee.

🔍 AMPM exclusive check

Nothing differed from the official page this time; every number below matches it, checked 2026-09-21. The free tier is confirmed at 500 AI credits per week, resetting weekly, with unlimited editing and PNG/PDF export but Napkin watermarking. Plus is verified at US$9/month with 10,000 monthly credits, unlimited PPT and SVG export, and three brand styles. Pro is verified at US$22/month with 30,000 monthly credits and unlimited brand customization. No annual discount, no team tiers, no free trials listed.

☀️ AMO, the budget-minded cat

AMO’s instinct: a free tier that never expires is a gift. Napkin doesn’t pull the rug out after 30 days or cripple your workspace. You can generate diagrams forever for free.

500 weekly credits means roughly 2,000 per month. That’s enough for one-off infographics, brainstorm sketches, teaching materials, and testing before committing money. Many people and solo creators will never need more.

The pain point is the watermark and the wall. The Napkin badge on every export signals “made with automation,” which feels less professional in client-facing work. Some clients perceive watermarked assets as drafts or low-effort outputs, even if the diagram is thoughtful.

The hard cap also creates friction. Mid-project, when you realize you need diagram #501 this week, there’s no override. You either pause until next week or pay US$9 to continue. That upgrade moment is uncomfortable: you were free, now you’re not.

For teams that need 10–15 diagrams per week, free holds steady. For anyone generating 20+, Plus becomes inescapable. And US$9/month is cheap enough that it stops feeling like a splurge and starts feeling like “just pay it.” That’s the psychological cliff free tiers are designed to create.

AMO’s verdict: stay free if you generate fewer than three diagrams per week. If you’re at 5–10, hold out as long as you can tolerate the watermark. At 20+, Plus is the floor.

🌙 PIMI, the performance-minded cat

PIMI bypasses free and asks: does the paid plan actually deliver?

Plus gives 10,000 credits monthly. Assuming each diagram costs one credit (a typical scenario), that’s roughly 330 credits per working day. If you generate five diagrams a day, you’re using 5% of your quota. You will never hit the cap.

The real wins for PIMI: SVG and PPT export. SVG is infinitely scalable—embed it in a website, blow it up on a poster, zoom in without pixelation. PNG degrades at scale. If you’re building reusable diagram libraries or syncing diagrams into Figma or other design tools, SVG transforms the tool from one-off sketch maker to production asset factory.

The three brand styles on Plus let you snap diagrams into a house template. Not revolutionary, but it saves three design handoffs per diagram.

Pro’s 30,000 credits approach unlimited for most workflows. The custom fonts and full brand customization mean Napkin becomes invisible infrastructure. You’re not fighting the tool’s defaults; the tool becomes yours.

The US$13 gap between Plus and Pro (US$9 to US$22) is a 144% increase for 3× the credits and more customization. If you’re generating 100+ diagrams monthly, Pro’s headroom justifies the cost. Below 50 diagrams monthly, Plus is the rational choice.

Neither plan mentions priority support or uptime SLAs, so you’re on standard support queues if something breaks.

Verdict: who should use it, who should skip it

Use free if you’re testing Napkin’s workflow, generating fewer than 10 diagrams weekly, and don’t mind displaying the Napkin watermark.

Use Plus if you’re creating 10–50 diagrams weekly, need SVG or PPT export, and want watermark-free delivery with light brand customization.

Use Pro if you’re generating 50+ diagrams weekly or building diagrams into a larger automation pipeline where customization and scale matter.

Skip if you need photography, illustration, or photo editing (Napkin makes diagrams, not images) or if you need unlimited monthly generation with no quota resets (Napkin caps all tiers; there’s no “unlimited” option).

Written: 2026-09-22

Price last verified: 2026-09-21

Tool last health-checked: 2026-09-21

🔗 Related on AMPM

• Napkin AI pricing & free tier

📎 Sources

All prices and quotas in this article come from AMPM’s verified dataset for Napkin AI (last verified 2026-09-22); primary sources:

• https://www.napkin.ai/pricing
• https://www.napkin.ai

🐾 Meet the cats: AMO and PIMI

AMPM is a Taiwan-based AI-tool pricing watchdog. Our motto: ask before you subscribe. Two cats argue every tool from two sides:

• ☀️ AMO — the budget-minded cat. Always asks: is the free tier enough, and is paying actually worth it?
• 🌙 PIMI — the performance-minded cat. Cares about whether it works well, fast, and gets your job done.

When they are done arguing, you know whether to pay. Every number is checked by us, with the verification date at the end.

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