Your detective knows too much. Your reader too little.
When you write crime fiction, every clue, every alibi, and everything your detective knows must hold up across the entire manuscript. Vellam checks whether you planted clues before the solution, whether alibis are consistent across chapters, and whether your detective knows things they couldn't possibly know yet.
Vittore Carpaccio, The Vision of Saint Augustine, 1502
Vellam · Chapter 14 analysis2,500 credits
"Kowalski glanced at his watch. Five thirty. Nowak claimed he was in Krakow at that time."
Nowak's alibi, ch. 14Nowak claims to be in Krakow at 17:30, but ch. 9 places him in Warsaw at 16:00. Distance impossible.
Clue, ch. 14Kowalski finds a lighter with initials. First mention of the lighter anywhere in the manuscript.
Kowalski's knowledgeconclusions in ch. 14 follow from evidence gathered in ch. 6, 9 and 11. Investigation logic consistent.
Chapter 14 of 26 · Analysis time: 15 s
300+
romance writers
5,000
free credits to start
a few min.
instead of weeks of waiting
What you get
Reads like someone who genuinely cares
01 · Key for crime fiction
No clue is left unresolved
A clue appears in chapter 18 and the detective uses it in chapter 22. Vellam checks every clue and every deduction: was the evidence available to the reader before the detective used it, and did the clues you planted get resolved?
02 · Key for crime fiction
The alibis hold and your detective never knows too much
A suspect was in Krakow in chapter 4. In chapter 11 they commit a scene in Warsaw at the same time. The detective reasons from a lab report in chapter 9, but only receives it in chapter 14. Vellam catches both types of error before they reach your beta readers.
Story Atlas
Who is a suspect, where they were, what they knew
Vellam builds a profile for every character and key event based on what you wrote. No setup required. You see motive, alibi, relationships, and each character's knowledge state in every chapter.
✓Automatic detection of characters and suspects
✓Alibi and location in every chapter
✓Detective's knowledge state step by step
✓Consistency flags: when investigation logic breaks down
From the first clue to the final chapter. Vellam tracks every step.
01
Evidence chain
Vellam maps every clue from the moment it appears in the text to the moment the detective uses it. You see which clues are unresolved, which appear too late, and which are never summarized.
02
Dead ends
Every false lead you introduce must be explained before the crime novel ends. A reader who followed a suspicion about Agnieszka for eight chapters deserves to know why they were wrong. Vellam checks that every dead end has a resolution.
03
Character knowledge over time
Who knew what, and when. Vellam tracks every character's knowledge state chapter by chapter and flags moments when someone acts on information they couldn't yet have. The most common reader complaint in crime fiction: "how did they know that?"
We are building the features crime writers need most.
Fair play audit
Coming soon
Did your reader have a fair chance to solve the mystery alongside the detective? Vellam maps every deduction to a specific earlier clue and evaluates whether your crime novel plays fair.
Coming soon
Dead-end tracker
Coming soon
Every false lead you plant must be explained. Vellam tracks all red herrings through the manuscript and shows which ones disappear without resolution.
Coming soon
Character knowledge map
Coming soon
A per-chapter map of what every character knows at any given moment. No more detectives stepping on evidence they couldn't possibly know about yet.
Coming soon
Motive verification
Coming soon
The killer's motive must be in the text before it is revealed. Vellam checks that every suspect has an established motive earlier than their exposure, not just in the epilogue.
Coming soon
Crime timeline
Coming soon
Auto-generated reconstruction of key events from your manuscript. Immediately see if anything is logistically impossible: distances, times, alibis.
Coming soon
Procedural analysis
Coming soon
Crime readers know procedure. Vellam compares police, prosecutor, and forensic actions in your text against actual legal standards and flags where procedure breaks down.
15,000✓15,000 free credits to start, no credit card
$0✓One-time payment, with no subscription running in the background
Never✓Purchased credit packs never expire
Your pace✓Write at your own pace, Vellam will wait
From writers
What users say
Gustave Doré, Don Quixote, 1863
A fascinating tool, recommended to me by a colleague in the industry. It delivers deeply considered feedback with a handy breakdown by chapters and areas of work. I recommend it to the authors I collaborate with as their first beta reader, and to editors as a supporting tool that generates ideas.
PPawełEditor, recommends Vellam to authors In an editor's work A first read for the authors he works with.
I was skeptical about "AI for writers", I expected yet another tool that would tell me my sentences are too long. Vellam actually tracks plot threads. It showed me that the subplot with Detective Nowak disappears after chapter 14 and never comes back. I had it in my head, but I couldn't see it on "paper".
TTomaszWrites crime fiction Thread status Detective Nowak disappears after chapter 14. The thread is never closed.
The text analysis made a positive impression on me. You could see exactly what needed improvement and what was missing. Unlike typical AI, the tool picked up on the very things I myself felt needed polishing. I like that it automatically detects characters, analyzes geography and other elements that a person wouldn't normally notice on their own.
PPatrycjaNovelist Characters and geography Characters, places and the facts of the world picked up without describing them by hand.
Vellam pointed out things none of my beta readers noticed, for example, that one of the characters appears in chapter 8 as if the reader already knows her, but I don't actually introduce her until chapter 11. A minor detail, but exactly those details knock you out of the reading experience. I also got a great thread map that made it clear I was wrapping up three plotlines too quickly.
KKasiaNovelist Character trait A character appears in ch. 8 as if familiar, but is only introduced in ch. 11.
I self-publish my books, and before Vellam, every editing round was a logistical nightmare: notes in Word, margin comments, an Excel spreadsheet for plotlines, plus sticky notes with a timeline on the wall. Now I have it all in one place, and more importantly, in a format that can actually be used.
DDawidSelf-publishes his books Instead of Word, Excel and sticky notes Threads, characters, comments and the timeline in one place.
I used to wait two, three months for feedback from beta readers, sometimes longer, because everyone has their own life and reading someone else's text isn't always a priority. With Vellam I got specific, actionable feedback in a matter of minutes.
MMartaNovelist Instead of three months Specific notes on the novel in a matter of minutes.
I am writing my debut novel. Every new chapter fills me with joy, but I also have plenty of doubts. I analyze them with Vellam, which has become an important partner in my creative process. Its suggestions take into account character traits (not just appearance, it handles psychological character analysis very well), as well as plot thread development and location descriptions and their significance to the story. I have already incorporated many of Vellam's suggestions for improving scenes. Many I haven't, because they didn't fit my vision, but they made me think. Vellam notices details I no longer pay attention to while writing. It helps maintain logic and consistency, sometimes suggesting to highlight details that could strengthen the message. I like working with Vellam because it gives me the opportunity to quickly test my own vision against reality. I revise the chapter we discuss, but I also approach the next ones with greater care. And I get all the feedback and suggestions immediately, so the creative process flows really smoothly.
AAgataWriting her debut novel What helps Agata Character psychology, plot logic and consistent descriptions.
Reviews come from Vellam users who agreed to their publication. Some have been translated from the original language.
Pricing
Simple. No subscription.
Pay once and use whenever you want: this year, next year, when you finish one volume and start the next. Credits don't expire.
$0forever · no card
Write and organize. No text limits.
✓ Write the whole book in the editor, no word limit
For writers working on a whole series. Contact us if you need more.
What credits pay for
One credit balance works across almost the whole app. You never buy analysis and chat separately: every feature takes what it uses from the same balance.
Chapter and full-book analysis
Consistency analysis
Craft analysis
Reader reaction
Chat with a character
Chat with the assistant
Fact check
Translations
A full analysis uses the most, about 2.5 credits per word. A chat with the assistant or a fact check usually costs a few hundred credits. Writing, the Story Bible and export are always free.
In every pack
✓ Know what is off in your plot, characters and locations
✓ An analysis that knows your world and your rules
✓ Upload a finished .docx, .txt or .pdf
✓ Every chapter read in the context of the whole book