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Offline-first writing, built for series authors

A series is too big to keep in your head.

And sticky notes weren't built for book six. Verkilo is your continuity manager. It remembers every character, location and loose thread across the whole series, and hands each one back the moment you need it. One desktop app. One purchase. Yours forever.

Download See how it works
Price
$128 once
Trial
30 days, no card
Data
On your computer
Princess of Mars
Verkilo editor with the workspace navigator and section details panels open Verkilo editor with the workspace navigator and section details panels open

A look inside

One window, everything your series needs.

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    Multi-Book Projects

    Keep a whole series in one project, every book side by side.

    More on multi-book projects
    Verkilo Books library with four books in one series project Verkilo Books library with four books in one series project

  2. 02 / 06

    Characters

    Profiles, a role in every book, every appearance and shifting relationships, for your whole cast.

    More on characters
    Verkilo character tools: profiles, appearances and relationships Verkilo character tools: profiles, appearances and relationships

  3. 03 / 06

    Planning Views

    The corkboard, the outliner, and the synopsis. Your book as cards, as a sortable table, or as pages you can print and mark up.

    More on planning views
    Verkilo corkboard, outliner, and synopsis planning views Verkilo corkboard, outliner, and synopsis planning views

  4. 04 / 06

    Manuscript Reports

    Twenty-three reports on the whole book, counted on your own machine: repetition, rhythm, clarity, structure, consistency.

    More on manuscript reports
    Verkilo Reports overview with a headline number for every report Verkilo Reports overview with a headline number for every report

  5. 05 / 06

    Writing History

    Track your streak, weekly words, and a year of writing at a glance.

    More on writing history
    Verkilo Writing History with a year heatmap and weekly word counts Verkilo Writing History with a year heatmap and weekly word counts

  6. 06 / 06

    Story Timeline

    Date your scenes in the story's own time, see the whole series four ways, and let Verkilo catch the continuity slips.

    More on story timeline
    Verkilo's Timeline view: the spring of 1886 in The Gods of Mars drawn to scale, one lane per plot thread, with the Threads panel open beside it Verkilo's Timeline view: the spring of 1886 in The Gods of Mars drawn to scale, one lane per plot thread, with the Threads panel open beside it
Take the product tour

The promise

Pay once. It's yours.

Buy Verkilo once and the version you bought is yours to keep, for as long as your computer runs it. There's no subscription, so you never pay again just to keep writing.

Every update to Verkilo 1 is free. Whatever comes after it, you'll never have to upgrade to keep working on your books. The version you own keeps opening them.

One license covers your computers, on Mac, Windows and Linux. You don't sign in to an account, and you don't need the internet to open your books. Your manuscripts live on your own disk, in files you can back up, copy and keep.

Left alone, Verkilo asks a server one thing: whether a newer version exists, once at launch. It sends nothing you've written.

Your writing stays on this computer unless you send it somewhere. There's no AI built in. If you want AI help, bring your own: paste in an API key from Anthropic, OpenAI or Google for the line editor, continuity checks and profile drafting, or connect an assistant like Claude Desktop. Your key, your bill, your call. Until you set one up, not a word leaves.

I write military science fiction under two names and I have seven books out. I wrote the last three in Verkilo. I built it to be the tool I'd trust with my own books, and this is the promise I'd want from anyone else's.

Read my story

Everything you need

Built for authors who think in series, not single books.

Series Bible

Characters, locations, items, and plot threads, tracked across the whole series. When the eye color changes in book three, you catch it before your reader does.

The whole series, one project

Every book in the series sits in one project, sharing the same characters and continuity. Move from book one to book ten without opening another file. Already have them in Scrivener? Verkilo opens Scrivener 3 projects, so the books you’ve written come with you.

Hit export, get a book

Export to EPUB, PDF, DOCX, HTML, and Markdown with professional typography. Ready for Amazon KDP, IngramSpark, or traditional submission.

Your Data, Your Computer

Your manuscripts live on your computer, not on someone else’s server. Write offline, anywhere, and nothing about your book has to leave the machine.

Just you and the page

Focus Mode clears the sidebars; Composition Mode dims every line but the one you’re writing. Dark mode and an accent color you pick.

Nothing you write is lost

Verkilo snapshots your work as you write. Compare any two versions and restore an earlier draft when you need it.

Why authors choose Verkilo

See how we compare.

Feature Verkilo ScrivenerAtticusDabbleVellum
Series Bible
Opens Scrivener projects Word export onlyWord export onlyWord export only
One-time purchase $128 $59.99/platform$147$699$199.99 / $249.99
No subscription $19/mo
Desktop / local data
Works offline forever
Spelling & grammar BasicSpelling onlyCloud-basedBasic
Pro EPUB/PDF export Basic Word only
Windows, Mac & Linux Win/Mac Mac only
Household license

Verkilo and Scrivener, side by side

Competitor prices as of 2 October 2026; features as of 31 July 2026.

Questions & answers

Everything you need to know before you buy.

What platforms does Verkilo support?
Verkilo is available for macOS (both Apple Silicon and Intel Macs), Windows 10/11 and Linux (as both .deb package and AppImage). One purchase covers all platforms.
Is Verkilo a subscription?
No. You buy Verkilo once, and every update to the current release (1.x) is included. Try everything free for 30 days first. When you do buy, one license covers all your personal devices.
Where is my data stored?
Your manuscripts and series data are stored locally on your computer. Verkilo is a desktop app that works completely offline. You own your data. No cloud lock-in, no account required to use the app.
Can I try Verkilo before I buy?
Yes. Every download is the full app, free for 30 days. Write real manuscripts, use the Series Bible, and export to EPUB, PDF and DOCX, all with no credit card, no email and no account. When the trial ends, Verkilo locks until you buy. Nothing is deleted, your projects stay safe on your own disk, and a one-time license picks up exactly where you left off. Buy only once Verkilo has earned a place in your workflow.
What is the Series Bible?
The Series Bible lets you create entries for characters, locations, items and plot threads that persist across all books in your series. Link entries to scenes, track character appearances and never lose track of details like eye colors or birthdays.
Does Verkilo check spelling and grammar?
Yes. Verkilo has built-in spelling and grammar checking that runs entirely on your computer. The checker uses no cloud service, no AI model and no account. Right-click to check a section, fix issues from the context menu and add invented names to your personal dictionary. Character and location names from your project are recognized automatically.
What export formats are supported?
Verkilo exports to EPUB (for ebooks), PDF (for print and proofing), DOCX (for editors and agents), plus HTML and Markdown. All exports use professional typography: proper em dashes, curly quotes, and widows and orphans handled automatically.
How do I activate my license?
After you buy, Lemon Squeezy (our checkout partner) emails you a license key. In Verkilo choose Help ▸ Activate License… (on a Mac, Verkilo ▸ Activate License…), paste the key, and you’re done. Activation needs an internet connection just that once. From then on Verkilo runs entirely offline. One key covers all the computers in your household. Lost the email? Your key is always available from Lemon Squeezy’s My Orders page.
Does Verkilo use AI?
No AI is built in, and nothing is on by default. Spelling and grammar run on your own computer, with no cloud service and no account. If you want AI help, bring your own. Paste your own API key into Settings, where it stays on your computer, and the line editor, continuity checks and profile drafting can send the text you pick to Anthropic, OpenAI or Google. The line editor brings its suggestions back as tracked changes you accept or reject one at a time. Or connect an assistant like Claude Desktop or Cursor to your project. Your key, your bill, your call. Your writing stays on your computer unless you choose otherwise, and your manuscript stays a file on your own disk either way.

One-time

No subscription. No cloud. Yours forever.

Try every feature free for 30 days. No credit card, no account. Buy once when you're sure, and it's yours forever across all your desktops.

$128 once
Buy Verkilo

Rather try first? The 30-day trial needs no card and no account.

What's included

  • Full-featured 30-day free trial
  • Every feature included
  • Mac, Windows & Linux
  • Use on all your desktop devices
  • Free updates for version 1.x
  • Your data stays on your computer
  • Export to EPUB, PDF, DOCX, HTML & Markdown
  • Series Bible for character tracking
  • No cloud account or login needed

Write your next book in Verkilo.

Every feature free for 30 days. No card, no account. If it earns a place in your workflow, it's $128 once, and yours for good.

Download Verkilo