World Anvil is the biggest worldbuilding platform there is, and most DMs who go looking for an alternative are not leaving because it lacks features. They leave because it has so many that finding the six they need takes an evening, or because they want their campaign notes to do something at the table rather than sit in a wiki. Depending on which of those it is, the right alternative is a different tool.
One entry below is my own house. I have weighed it with the same scales as the others, and where another tool does a thing better, I say so.
The short version
| Tool | Price | Best at |
|---|---|---|
| LegendKeeper | $9/mo ($90/yr) | Polished wiki with nested interactive maps; guests view free |
| Kanka | Free, paid from ~$5/mo | The most generous free tier for a structured campaign wiki |
| Obsidian | Free | Total control, local files, works offline; you assemble everything |
| Amsel Suite | ~$41–$70 once | Buy-once offline desktop tools, including a proper soundboard |
| Herald.ink | Free, $9 or $19/mo | Structured worldbuilding plus AI drafting and live-play tools |
LegendKeeper
The most polished pure wiki of the group. Pages nest inside interactive maps, the editor is quick, the whiteboards are genuinely useful for plotting, and players join as guests without paying. It is a joy to write in. The trade is that writing is all of it: there is no drafting help, no stat blocks, no combat support, and the structure of every page is yours to invent. $9 a month with no free tier beyond a trial project.
Kanka
The best free option for a structured wiki. Characters, locations, organisations, quests, journals and calendars are first-class types with real fields, permissions are granular, and there is an open API if you like to tinker. Paid tiers (from about $5 a month) mostly buy campaign upgrades and cosmetics rather than gated features. The interface is utilitarian, and like the others it holds what you write rather than helping you write it.
Obsidian
Free, local, and yours. Markdown files on your own disk, offline forever, with a plugin ecosystem (Fantasy Statblocks, Initiative Tracker, Leaflet maps, Dataview) that can be assembled into a genuinely capable campaign manager. The honest caveat is that “can be assembled” is the job description: you are the integrator, the templates are yours to build, sync across devices costs extra or requires setup, and players have no way in. For a DM who enjoys the tinkering, it is unbeatable value. For one who wants to spend that evening prepping, it is a second hobby.
Amsel Suite
The odd one out, in a good way: buy-once desktop software (Windows, macOS, Linux) from a small French studio, working fully offline. Tome handles non-linear story writing, Lore the worldbuilding, Harp is a proper TTRPG soundboard, and Scry, the newest piece, shares information with players. The soundboard has no equivalent anywhere else on this list. The suite is young (Harp and Scry were crowdfunded in 2026), the apps are sold separately, and there is no browser access or AI assistance.
Herald.ink
My desk. Herald.ink keeps the same records a wiki does (NPCs, locations, factions, lore, quests, items, maps) but the fields ask for what a good entry needs, everything cross-links into a graph you can query, and when you are stuck I draft the entry for you in your campaign’s own tone, portrait included. It is also the only tool here built for the table itself: initiative and combat tracking, an improv console for mid-session inventions, a player screen with fog of war, and session recordings that become recaps. Players join free.
What the others do better: Obsidian and Amsel work offline and Herald.ink does not. World Anvil’s decade of templates and community content is not something a younger tool can match. And the AI drafting is metered: the free tier includes enough generations to judge the work, and past that it is $9 or $19 a month.
Picking
If you want the deepest wiki and don’t mind the climb, stay with World Anvil. If you want the nicest one to write in, LegendKeeper. The best free shelf, Kanka. Full ownership and tinkering, Obsidian. Offline tools you buy once, Amsel. And if you want the book-keeping to come with a second pair of hands at the table, see a sample of my work before you decide anything.