Nothing
your players do
is ever forgotten.
Campaign Arks is an AI session-prep assistant that knows your whole campaign — every NPC, every loose thread, every secret you haven't dropped yet. Talk through what's next, and it drafts the scenes while you keep the pen. Nothing enters your world until you approve it.
Free for one campaign, forever · No credit card
Works with D&D, Pathfinder, Daggerheart, and any tabletop RPG
Never start from a blank page again.
Brainstorm your next session out loud, half-ideas and all. The assistant knows your world, and it answers in pieces you can play — an NPC with a grudge, a tavern with a problem, a scene ready to run.
Captain Mirel Iron-Eye
Privateer with a clockwork eye and half a crew. Her ledger says one life — Brannoc’s — squares her debt with the Drowned God.
The Rusty Anchor
A tavern half below the tideline. The regulars pay in stories; lately the sea pays too, in black coins.
The Coin is a Key
Every black coin opens the Vault beneath the bay — and the cult is spending them fast.
The Drowning Room
A locked room filling with the sea Brannoc is leaking. Save him fast, or the district pays the difference.
Mirel's Blockade
Privateers hold the only dry road out of the Docks. The toll is one fugitive — and she’s not wrong about the math.
Your campaign, in story-sized pieces.
The GM toolkit that preps with you.
Campaign Arks is built for one specific job: turning campaign notes into a session you're ready to run.
Prep once, deploy at the table.
Prep once, deploy at the table.
Prep the ambush weeks before the party finally takes the coast road. Story blocks — scenes, encounters, secrets, magic items — wait in your library until the moment lands, and once played, they file themselves.
Prep scenes, encounters, and secrets you can pull into any session
Used a secret at the table? It marks itself as revealed automatically
Search and link across your entire campaign instantly
An AI partner that knows your world.
An AI partner that knows your world.
Stuck on a character or a plot twist? Ask the AI — it suggests ideas that fit your tone, your lore, and your players. Suggestions appear right in your document, and you decide what stays. You're the author; it's the assistant.
AI suggestions appear inline — accept, edit, or dismiss
Get scene ideas, NPC concepts, and encounters rooted in your lore
Brainstorm freely or let the AI research your campaign for context
Everything in its place.
Everything in its place.
Thirteen document types built for how campaigns actually run: NPCs with a status you can trust, secrets that remember whether the party has found them — and eleven more. Every piece of your world gets a home.
NPCs, locations, arcs, sessions, encounters, secrets, magic items, and more
See your campaign hierarchy at a glance
Find the right resource instantly with full-text search
Walk in Thursday with the session already prepped.
Talk through your ideas tonight, and Campaign Arks drafts your session. You sit down ready to run, without losing the week to it.
Free for one campaign, forever · No credit card
Captain Mirel Iron-Eye
Privateer with a clockwork eye and half a crew. Her ledger says one life squares her debt with the Drowned God.
Built for the way you run games.
Some GMs script every beat. Some wing it from a single index card. Campaign Arks preps either way.
The Improv GM
You say 'yes, and...' and figure out the consequences later. Campaign Arks keeps your NPCs, secrets, and locations ready to pull into the scene the moment you need them.
The Busy GM
You have 30 minutes between putting the kids to bed and sitting down at the table. Campaign Arks handles the organization, so those thirty minutes go to the creative part.
The Narrative GM
You run campaigns where player choices matter and character arcs drive the story. Campaign Arks tracks plot threads, promises, and motivations so your world feels alive — session after session.
Designed by a GM who got tired of spending more time prepping than playing.
See it in action.
Watch a 20-minute session prep happen in 30 seconds.
Campaign Library
Brannoc Tidebound
Captain Mirel Iron-Eye
The Weaver in Grey
Matriarch Seraine Vance
The Rusty Anchor
The Drowned Docks
Ysori Deepwave
The Drowning Room
Weaver’s Homecoming
The Harbor Bell
Dockhands in the Dark
Mirel's Blockade
The Lighthouse Signal
The Coin is a Key
Vance's Bargain
The Storm is Artificial
The Pact of Salt
Session Assistant
Already running a campaign? Just describe your world — Campaign Arks helps you set up your library in minutes.
Your world stays yours: never shared, never used to train AI.
What GMs are saying.
Game Masters running real campaigns — on what changed when they brought Campaign Arks to their prep.
I've been using different AI tools for a while now to help with my D&D prep, but none of them seemed to really achieve what I wanted. … it really seems to do what the others were missing, namely handling all the organization and allowing me to focus on the creative side. I already bumped up to the pro tier.
D&D GM · Pro subscriberI’ve been working on a campaign for the day. I’m 20+ documents in and I’ve only personally created 5. The ease of this tool is amazing. I’m running my first session tomorrow using what I have created.
One day inbtw pro is totally worth it the standard AI's buckle under the weight of campaigns in my experience and start hallucinating. I have upwards of 150 documents and campaign arks chugs along just fine
Solo-DMs a homebrew worldI'm prepping for my next campaign, and can safely say this tool is my new favourite - never realised how utterly chaotic my notes were until now 😅
Runs a weekly gameI’m sure there’s probably been a good bit of push back for using ai in the ttrpg space in any capacity, but man this has been a really amazing experience for me. Just having something assisting in fleshing things out and expanding has been great
18 months into one campaignthe AI is SUPER helpful btw 🙂 I am developing my Vampire game right now and it is what i need
7 years DMing · runs three gamesI was able to use it yesterday to help me start a new arc for my text game as well when I wasn't sure what kind of plot to do. I know you don't need more good reviews, you have enough, I just wanted to mention it's helpful.
Runs a text-based gamePlans & pricing.
Start free with one campaign, forever. Upgrade when your prep outgrows it.
Free
$0/month
Prep one campaign with an AI brainstorming partner. See what 20-minute prep feels like.
1 campaign
All 13 document types (NPCs, arcs, sessions, and more)
AI brainstorming partner
Full editor with linking
Pro
$12/month
Unlimited campaigns, with an assistant that has read every page of them.
Everything in Free
Unlimited campaigns
Full AI agent: researches your campaign, drafts for your approval
100 AI credits a month
Premium
$30/month
For GMs running several tables — or one megadungeon. Five times Pro's credits, plus cover art.
Everything in Pro
500 AI credits a month
AI cover image generation
Priority support
Frequently asked questions.
Everything you need to know about AI session prep for tabletop RPGs.
Your next session is waiting.
Build the campaign you've always wanted to run — without losing your week to it.
Free for one campaign, forever · No credit card