Tessarios

A free, open-source desktop app for building story worlds and writing the book inside them. Plain Markdown files, no account, works offline.

Open a vault

Open a folder on your disk or return to a recent world. The dialog also shows whether LM Studio or Ollama is available for optional AI features.

Cost / License

Free
Open Source (AGPL-3.0)

Application typeApplication types

Since

Updated

Archived

Alerts

Discontinued

Platforms

Windows

Character dossier

Structured character facts and free-form writing sit side by side. Fields can link to other entries in the same Markdown vault.

Review a proposal

The Chronicler proposes a rewrite of one section. Compare it with the current text, then replace, append or discard it. Nothing changes until you choose.

+10

Connected world

Characters, places and story entries are connected by their links. Category filters and vault statistics help reveal the shape of the world.

Tessarios alternatives

Discontinued

Project status: archived, no longer maintained. Tessarios is a free, open-source project provided as-is. Active development has ended. No future updates, bug fixes, compatibility updates or technical support are planned; issues and pull requests are not accepted. The source is public under the AGPL so anyone can use, study and continue it. Forks are welcome.

0likes

38alternatives

0articles

Properties

Privacy focused
Lightweight
Distraction-free

Features

Scene Management
Local AI
Word counter
Integrated Search
Ad-free
Portable
Support for MarkDown
Dark Mode
Works Offline
No Tracking
No registration required
Track Characters
Content Templates
Tagging
Offline
Places tracking
Character database

Tessarios information

Developed by
Bekarioslabs
Licensing
Open Source (AGPL-3.0) and Free product.
Written in
TypeScript
Alternatives
38 alternatives listed
Badge
Get an embeddable badge for Tessarios
Supported Languages
- English
- German

AlternativeTo Category

News & Books

GitHub repository

0 Stars
0 Forks
0 Open Issues
Updated Oct 30, 2026 (Archived)

View on GitHub

Popular alternatives

View all

Tessarios was added to AlternativeTo by BekariosLabs on Oct 30, 2026 and this page was last updated Nov 5, 2026.

No comments or reviews, maybe you want to be first?

AppStores & Other Links

What is Tessarios?

Tessarios is a local desktop app for worldbuilding and novel writing. Your world lives as plain Markdown files with YAML frontmatter in a folder on your disk, so you can open it in Obsidian or any text editor, and nothing is locked into a database or a server.

Features:

Typed entries for characters, places, organisations, powers, items, lore, storylines and more, each from a template with fields and links to other entries Manuscript workspace: book, chapter and scene, with status and word counts Relationship graph, interactive maps with pins linked to entries, media gallery Version history: the previous version of an entry is saved before every change Optional local AI (early beta) via LM Studio or Ollama. It only proposes text and never changes a file without your click. Everything else works without it. English and German interface No account, no cloud, no telemetry. Windows 10/11, portable zip, nothing to install.