How Much Does an AI Dungeon Master Cost? Scrollbook Pricing Explained

A clear breakdown of what AI DM tools actually cost in 2026 — including what drives the price, how hour-based billing works, and how to pay as little as possible.

If you've been searching for an AI Dungeon Master, you've probably noticed the pricing is... not always obvious. Some tools are free with heavy limits. Some charge per month with no usage tracking. Some cost more than a Netflix subscription without being clear about what you actually get.

Here's a straight answer to what AI DM tools cost in 2026, with a full breakdown of Scrollbook's model.

The Short Answer

Plan	Monthly Cost	What You Get
Free	$0	3 AI hours (one-time trial)
Single Campaign	$12.99/mo	10 AI hours/month, 1 campaign
Multi-Campaign	$24.99/mo	20 AI hours/month, 3 campaigns
Unlimited Guild	$49.99/mo	50 AI hours/month, unlimited campaigns
Annual discount	10% off	Pay yearly, save ~$15–$60/year

Extra hours available as one-time packs if you run over.

What Drives the Cost of AI DM Tools

Unlike a flat SaaS subscription, AI-powered tools have real compute costs behind them. Every time Claude narrates a scene, responds to a player action, or answers a rules question, it's running inference on a large language model. That costs money per token.

Scrollbook passes some of that cost to users through an AI hour model — you pay for active session time, not for idle time. The web app, character sheets, campaign dashboard, and session history don't consume AI hours. Only live Cipher sessions do.

This is actually more fair than a flat fee: a DM who runs one 2-hour session per month pays differently than a DM running four 4-hour sessions.

How AI Hours Actually Work

An AI hour = one hour of Claude actively running your session.

What counts:

Cipher narrating scenes and describing locations
Cipher voicing NPC reactions and dialogue
Cipher adjudicating rules and resolving actions
Cipher tracking dice rolls and updating character stats

What doesn't count:

Time between sessions (idle time)
Players reading session summaries on the web app
Browsing campaign notes, NPCs, or character sheets
Any activity outside a live Cipher session

Typical usage: A 2-hour D&D session uses approximately 2 AI hours. Players talking, thinking, and roleplaying between AI responses doesn't run the clock.

What Does Each Plan Actually Get You?

Free — $0

3 AI hours (one-time, expires after 30 days)
Join unlimited campaigns as a player
View-only campaign access
Basic dice roller
3 character slots in Scrollbook

Good for: Testing the experience before committing. One full short session, or a few partial sessions.

Single Campaign — $12.99/month

10 AI hours per month
1 active campaign
Full Scrollbook access
Homebrew content creation
Character and campaign import/export
Session recordings and transcripts
Automated session summaries
Overage: $1.50/hour if you exceed 10 hours

Good for: Casual DMs running one weekly or biweekly campaign. 10 hours covers 4–5 typical sessions per month.

Multi-Campaign — $24.99/month

20 AI hours per month (shared pool across all campaigns)
3 active campaigns
Everything from Single Campaign
World-building tools and NPC tracker
Faction system
Priority AI processing
API access
Overage: $1.25/hour

Good for: Active DMs running multiple groups, or DMs who want a buffer for longer sessions.

Unlimited Guild — $49.99/month

50 AI hours per month
Unlimited campaigns
Everything from Multi-Campaign
Admin dashboard
Custom branding
Shared homebrew library
Priority support (2-hour response)
Beta feature access
Overage: $1.00/hour

Good for: Gaming communities, Discord servers, and DMs running campaigns professionally.

One-Time Hour Packs (No Subscription Required)

If you run over your monthly hours, or just want a buffer without upgrading, you can buy hour packs:

Pack	Hours	Price	Per Hour
Quick Session	5 hours	$5.99	$1.20
Weekend Bundle	12 hours	$11.99	$1.00
Marathon Month	30 hours	$24.99	$0.83
Bulk Bundle	100 hours	$69.99	$0.70

Hour packs never expire. They're a good safety net if you occasionally run long sessions.

Annual Plans (10% Off)

Plan	Monthly	Annual (per month)	Annual savings
Single Campaign	$12.99	$11.69	~$16/year
Multi-Campaign	$24.99	$22.49	~$30/year
Unlimited Guild	$49.99	$44.99	~$60/year

If you know you'll be running a campaign for 6+ months, annual is worth it.

How to Pay as Little as Possible

Start with the free trial. 3 hours is enough to run a full introductory session and decide if Cipher fits your style.

Match the plan to your actual usage. If you run one campaign and play twice a month (4 hours total), Single Campaign at $12.99 covers you comfortably.

Use hour packs for occasional overages instead of upgrading your plan. If you go over once every few months, a pack is cheaper than a tier upgrade.

Go annual if you're committed. 10% off for paying a year upfront is straightforward savings.

Is It Worth It?

For context: a Roll20 subscription runs $9.99–$16.99/month and doesn't include an AI DM. A DnD Beyond subscription with sourcebooks can run $30–$60/month for content alone.

Scrollbook's $12.99/month includes an AI that actively DMs your sessions, tracks your whole campaign, writes session summaries, and updates character sheets in real time — all without anyone having to sit out and run the game.

If you've ever run a campaign where one person always has to be the DM, the math gets pretty clear.

Start your free 3-hour trial → See full pricing details →

FAQ

Do unused monthly hours roll over? No — monthly hours reset each billing cycle. But hour packs you buy separately never expire.

What happens if I run out mid-session? You'll get warnings at 80% and 95%. If you hit zero, the session continues with basic features only. You can instantly buy a pack to restore full Cipher access.

Can I cancel anytime? Yes. No contracts, no cancellation fees. Downgrades take effect at the next billing cycle.

Is there an enterprise option? Yes — custom pricing, dedicated support, SLA guarantees, and volume discounts. Contact us for enterprise details.