Crime Fiction · Thriller

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.

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What Vellam does

Reads like someone
who genuinely cares

Key for crime fiction

Clue audit across the entire manuscript

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?

Key for crime fiction

Alibi consistency and detective knowledge across the whole text

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.

Investigation Protocol

From the first clue to the final chapter.
Vellam tracks every step.

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.

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.

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?"

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
Check for free
Chapter 14 of 26
K
Komisarz Kowalski Detective · 47 · Criminal division
Knows autopsy results, testimony of 3 witnesses, location of the lighter
Nowak's motive unclear Agnieszka's alibi unverified
N
Tomasz Nowak Suspect · 38 · Businessman
Alibi challenged, motive established in ch. 7
Location contradicts ch. 9
P
Agnieszka Wisniewska suspect · ch. 3-14 · motive: jealousy
Claims to have been at the theatre. Unverified.
Suspicion active from ch. 3, unresolved in the text
T
Crime timeline thread active
Crime: Friday, 15 March, approx. 22:00 (established in ch. 2)
Nowak: Krakow 17:30 (ch. 14) vs. Warsaw 16:00 (ch. 9)
On the horizon

Vellam grows
with your investigation.

We are building the features crime writers need most.

Coming soon

Fair play audit

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

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

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

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

Auto-generated reconstruction of key events from your manuscript. Immediately see if anything is logistically impossible: distances, times, alibis.

Coming soon

Procedural analysis

Crime readers know procedure. Vellam compares police, prosecutor, and forensic actions in your text against actual legal standards and flags where procedure breaks down.

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Komisarz Kowalski · ch. 1-14
47 years old criminal division 17 years of service investigation active
Tomasz Nowak · ch. 1-14
suspect alibi challenged Ch. 14: location contradiction
Crime timeline · active
3 inconsistencies Crime: 15 March 22:00

What
users say

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.

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".

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.

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.

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.

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.

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.

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