CharGen Icon

Field test report · as of July 2026

AI Dungeon Master Apps Compared: AI Realm, StoryRoll, and AIDungeonMaster.ai in 2026

Three apps promise an AI Game Master that runs your D&D session solo or with friends. AI Realm and StoryRoll are live today; AIDungeonMaster.ai is still waitlist-gated. None of them generate a reusable content library the way CharGen does.

Try CharGen FreeSkip to the matrix

The lineup

How the 4 tools compare.

Same campaign, same prompts, same target output, with the tradeoffs that actually showed up in my run.

FIELD KITAI portrait
WINNER

CharGen

Content generator for GMs who prep before an AI (or human) runs the session.

What I built, so apply the appropriate scepticism. None of the three apps in this comparison are content generators, and CharGen isn't an AI Game Master. AI Realm, StoryRoll, and AIDungeonMaster.ai all narrate a live session: they read what you type and respond in character, turn by turn. CharGen does the opposite job. It generates NPCs, monsters, settlements, dungeons, factions, and loot tables as structured, reusable entities with AI portraits and VTT-ready tokens, then lets you carry that content into whichever AI Game Master, or human DM, you're actually playing with that week. If you want the AI to run the session, pick one of the other three. If you want a world's worth of prep to bring into that session, this is the tool.

What it does well

  • 17 generator types: NPCs, monsters, magic items, settlements, dungeons, factions, loot tables, and more
  • Every entity comes with an AI portrait and a VTT-ready token, not a one-off in-session scene image
  • Linked world context: NPCs connect to settlements connect to regions, so prep stays consistent across sessions and apps
  • Content survives independently of any one AI Game Master: export it, screenshot it, or describe it to AI Realm, StoryRoll, or a live table

What it doesn't

  • Not an AI Game Master: no live narration, no turn-by-turn combat resolution
  • No voice narration or multiplayer session hosting
  • Requires pairing with an AI GM app or a human DM to actually run a session
Best for

GMs and solo players who want a world's worth of reusable prep content before they open an AI Game Master or sit down at the table.

Try CharGen Free
REALM WEAVERVirtual tabletop
APPROVED

AI Realm

The most established AI Game Master, with 200K+ campaigns and deep memory tools.

AI Realm is the most mature of the three: live since 2023, with 200K+ campaigns created and a 10K+ member Discord as confirmed on its homepage in July 2026. Its V2 update rebuilt long-term memory around a Notes system: NPC Cards, an interactive Character Sheet with animated dice, auto-updating Campaign Summaries, and GM Guides you write yourself to steer the AI. Free accounts get a 70,000-character shared context, eight storytelling AI models (including Gemini and ChatGPT), and three image generators for portraits and mid-campaign scene snapshots. The honest trade is that the AI still forgets anything not logged in Notes, by its own Player's Guide's admission, and I found no public price list. Paid tiers unlock more context and multiplayer for up to three friends, but AI Realm only shows a price after you sign in with a Google account.

Best for

Players who want the deepest campaign-memory tooling and the largest existing community of AI Game Master players.

Visit AI Realm
STORY SPARKVirtual tabletop
APPROVED

StoryRoll

Free AI Game Master, live today, playable within about 60 seconds.

StoryRoll is the fastest of the three to actually get into a session: no waitlist, no credit card, and its own materials claim about 60 seconds from landing on the site to your first scene. Pick a theme (classic D&D fantasy, deep space sci-fi, or a beginner-friendly enchanted fairy tale) and the AI Game Master narrates, runs combat with real initiative and ability checks, and voices NPCs, while every character gets a portrait and every location gets illustrated as you explore. Multiplayer works through a shared invite link with no per-player charge. StoryRoll is upfront about what it doesn't do: no tactical battlemaps, no grid-based combat, and a smaller community than the more established AI Game Masters. Its own blog mentions a future subscription for extended play, but I found no published price; everything I tested was free.

Best for

Anyone who wants to start an AI-run D&D session right now, free, with no setup friction.

Visit StoryRoll
RULES KEEPERVirtual tabletop
NOT TESTED

AIDungeonMaster.ai

5e-rules-first AI Dungeon Master with a creator marketplace, still gated behind a waitlist.

AIDungeonMaster.ai pitches itself on rules fidelity: full 5e combat with initiative, spells, conditions, and terrain tracked automatically, NPCs voiced individually, and a persistent memory the site says covers every NPC, plot twist, and promise across sessions. It's also building a two-sided Campaign Marketplace where creators publish adventures and keep 70% of what they sell. Its pricing page lists a free tier (one campaign, solo only, ten credits a day) plus paid Standard ($9/month) and Pro ($19/month) tiers that add guest players, monthly credits, and image and video generation. The catch, as of my research in July 2026, is that the whole product still sits behind an 'Apply for Early Access' waitlist. I could not create an account or play a session, so this entry is built from its public marketing and pricing pages rather than hands-on testing.

Best for

Players happy to join a waitlist for the most rules-faithful 5e combat tracking of the three, once it opens up.

Visit AIDungeonMaster.ai

The field log

Feature comparison.

Every cell verifiable from the linked sources at the foot of this report.

FIELD KITCharGen
  • D&D 5e-based rules
  • Live and publicly playable today
  • Free tier, no credit card
    account required
  • Multiplayer
  • AI-generated character portraits
  • Persistent campaign memory / notes system
  • Reusable structured entity library (beyond one campaign)
  • VTT-ready token export
  • Creator marketplace for campaigns
  • Video generation
REALM WEAVERAI Realm
  • D&D 5e-based rules
  • Live and publicly playable today
  • Free tier, no credit card
  • Multiplayer
    up to 3 friends, paid plans
  • AI-generated character portraits
  • Persistent campaign memory / notes system
    NPC Cards, Campaign Summary, GM Guides
  • Reusable structured entity library (beyond one campaign)
  • VTT-ready token export
  • Creator marketplace for campaigns
  • Video generation
STORY SPARKStoryRoll
  • D&D 5e-based rules
  • Live and publicly playable today
  • Free tier, no credit card
  • Multiplayer
    shared link, free
  • AI-generated character portraits
  • Persistent campaign memory / notes system
    auto recaps, no manual notes
  • Reusable structured entity library (beyond one campaign)
  • VTT-ready token export
  • Creator marketplace for campaigns
  • Video generation
RULES KEEPERAIDungeonMaster.ai
  • D&D 5e-based rules
  • Live and publicly playable today
    waitlist / early access
  • Free tier, no credit card
    free tier exists but product is waitlisted
  • Multiplayer
    up to 5 guests, paid plans
  • AI-generated character portraits
    Standard tier and up
  • Persistent campaign memory / notes system
    claims full cross-session memory
  • Reusable structured entity library (beyond one campaign)
  • VTT-ready token export
  • Creator marketplace for campaigns
    70% creator revenue share
  • Video generation
    Standard tier and up

Choose by problem

Match the job, then the tool.

Most tool decisions are job decisions in disguise. Pick the row that fits your real prep problem.

  1. 01

    If

    You want to start an AI-run D&D session right now, free, with no waitlist

    Use

    StoryRoll

    Live today, no credit card, and roughly 60 seconds from landing on the site to your first scene, by its own claim.

  2. 02

    If

    You want the deepest campaign-memory tools and the largest existing AI Game Master community

    Use

    AI Realm

    200K+ campaigns created, a 10K+ member Discord, and a Notes system built around NPC Cards and GM Guides.

  3. 03

    If

    You want the most rules-faithful 5e combat tracking and don't mind a waitlist

    Use

    AIDungeonMaster.ai

    Full initiative, spells, conditions, and terrain tracking, plus a creator marketplace, once early access opens.

  4. 04

    If

    You want reusable NPCs, monsters, and settlements to bring into any of these AI GMs or a human-run table

    Use

    CharGen

    None of the three generate a portable content library; CharGen produces entities with portraits and tokens that outlive a single campaign.

Pricing · as of July 2026

Plan costs side by side.

Verify against each platform's official pricing page before committing.

Tool
FIELD KITCharGen

Free

Yes, limited daily credits, account required

Entry paid

£9.99/mo (Plus)

Notes

Plus, Elite, and Ultimate tiers scale credits and unlock premium models. Elite includes commercial licensing.

REALM WEAVERAI Realm

Free

Yes, no credit card required, 70,000-character context cap

Entry paid

Paid tiers exist, price unconfirmed

Notes

AI Realm only reveals paid pricing after signing in with Google; higher tiers add multiplayer (up to 3 friends) and a larger memory context. I could not verify exact figures on the public site as of July 2026.

STORY SPARKStoryRoll

Free

Yes, fully free to play, no credit card required

Entry paid

No public paid tier found

Notes

StoryRoll's blog mentions a future subscription for extended play, but I found no published price anywhere as of July 2026.

RULES KEEPERAIDungeonMaster.ai

Free

Yes ($0): 1 campaign, solo only, 10 AI credits/day

Entry paid

$9/mo (Standard)

Notes

Standard unlocks 3 campaigns, 5 guest players, 500 monthly credits, and image/video generation. Pro at $19/mo scales to 5 campaigns, 15 guests, 1,200 credits. Still waitlist-gated as of July 2026.

Switching from AI Dungeon Master Apps

How to switch in ten minutes.

If you're already playing in AI Realm or StoryRoll and want richer prep, the workflow takes about ten minutes. Generate the NPC, monster, or settlement you need in CharGen first, with its AI portrait and linked world context. Then describe it to your AI Game Master: paste the details into an AI Realm NPC Card or Custom world description, or introduce the character in your next StoryRoll message. Once AIDungeonMaster.ai opens up, the same approach applies to its Campaign Marketplace listings. Nothing about your existing campaign has to change. CharGen fills the reusable-content gap none of these apps address; it doesn't replace the AI Game Master doing the narrating.

Try CharGen Free

FAQ

Common DM questions about this lineup.

Q01

What is the best AI Dungeon Master app in 2026?

It depends on what you can access right now. AI Realm has the largest community and the deepest campaign-memory tools. StoryRoll is free, live today, and the fastest to actually start playing. AIDungeonMaster.ai promises the most rules-faithful 5e combat tracking but remains behind a waitlist as of July 2026. CharGen isn't an AI Game Master at all: it generates the NPCs, monsters, and settlements you bring into any of the three.

Q02

Is AI Realm free?

Yes. AI Realm's free tier needs no credit card and includes character creation, a 70,000-character shared memory context, and image generation. Paid tiers add more context and multiplayer for up to three friends, but AI Realm only shows pricing after you sign in with a Google account, so exact figures couldn't be verified.

Q03

Is AIDungeonMaster.ai available yet?

Not fully. As of July 2026 it's still gated behind an 'Apply for Early Access' waitlist, even though its pricing page lists a free tier plus Standard ($9/month) and Pro ($19/month) plans. I couldn't create an account to test it hands-on.

Q04

Is StoryRoll free forever?

Right now, yes: everything tested was free, with no credit card required. StoryRoll's own blog mentions a future subscription for extended play, but no price is published anywhere I could find as of July 2026.

Q05

Do these AI Dungeon Master apps use real D&D 5e rules?

All three claim 5e-based mechanics. AI Realm builds on the D&D 5e SRD (2014). AIDungeonMaster.ai advertises full 5e combat with initiative, spells, conditions, and terrain. StoryRoll's fantasy theme uses 5e-style dice rolls, ability checks, and spell slots. None of them are licensed D&D products.

Q06

Can I use CharGen alongside an AI Dungeon Master app?

Yes. Generate NPCs, monsters, and settlements in CharGen first, complete with portraits and backstory, then describe them to whichever AI Game Master you're playing with: an AI Realm NPC Card or Custom world, a StoryRoll message, or an AIDungeonMaster.ai campaign once it opens up. The AI narrates the scene; CharGen supplies the world it's narrating.

References

Sources cited.

Verify any claim above against the source. Pricing snapshots taken on the date in the field above.

  1. [01]AI Realm official siteofficial
  2. [02]AI Realm Player's Guideofficial
  3. [03]AIDungeonMaster.ai official siteofficial
  4. [04]AIDungeonMaster.ai pricingofficial
  5. [05]AIDungeonMaster.ai aboutofficial
  6. [06]StoryRoll official siteofficial
  7. [07]EN World forum thread on AI Realmreview

Adjacent reports

Related comparisons and deep dives.

RoleForge alternatives in 2026

Five tested AI solo RPG engines including free options and oracle-based play.

Read the report

LoreKeeper alternatives in 2026

AI DM and campaign tools including multiplayer session runners.

Read the report

Quest Portal alternatives in 2026

VTTs for running a live session once your prep is done.

Read the report

Donjon alternatives in 2026

Random generator tools for quick session prep.

Read the report