What Brisk does well
Brisk is a Chrome extension, and Inspect Writing is one feature of a much larger teacher toolkit. By Brisk's own count, reported by TechCrunch in 2025, one in five US K-12 teachers had installed it. The adoption is earned: it works inside Google Docs where your students already write, basic Inspect Writing replay is free, and there is nothing new for students to learn or visit. If your class lives in Docs and you want a first look at writing process today, installing Brisk is a perfectly good move.
The replay shows the document growing: additions, deletions, and pastes across the revision timeline. For the common case (a student who pasted an entire ChatGPT essay into a blank Doc and submitted it twenty minutes later), this is often enough to see what happened.
What revision history can't show
Inspect Writing's ceiling is its data source. Google Docs revision history is a series of snapshots, batched and time-collapsed, never designed as evidence. Three consequences follow:
No typing rhythm. Snapshots show what changed between saves, not how it was typed. The human fingerprint of composition (bursts, stalls, the half-second hesitations at hard sentences) is below the resolution floor. A student running an autotyper extension, which "types" pasted text into the document at a steady rate, produces revision history that looks like ordinary typing. The defeat tool is a browser extension, the same delivery mechanism as the observer.
Observation, not policy. Brisk can show you a paste after the fact. It cannot block one, mark one against an assignment rule, or distinguish your "sources allowed" essay from your "closed-book" one. The student's Doc is an open environment, and the replay is a security camera, not a door.
An AI-detection score on top. Brisk's Pro tier adds AI detection inside Inspect Writing. Given where detector scores stand as evidence, we'd call that the least valuable part of the feature, and it's the paid part.
What Manupropria adds
Manupropria moves the writing into a canvas built for evidence. Students open your assignment link and write; nothing to install on their side. The canvas records keystroke-level timing, every paste under a per-assignment policy you set (allow, mark, or block), focus and session history, and runs tamper detection so the record itself is trustworthy. Eleven independent signals summarize whether the process is human-shaped, and the whole record renders as a replayable timeline you can read in seconds and export as a PDF when someone needs the evidence.
An autotyper against this stack doesn't blend in: its metronomic cadence is visibly inhuman on the timeline, and the timing-shape signals flag it without any AI detection involved. That difference, inference from snapshots versus a continuous record, is the entire reason we built a separate editor rather than another Docs extension.
Pricing
Brisk's basic replay is free; Brisk Educator Pro is $99.99 per year and gates the AI-detection layer and heavier usage. Manupropria has a free Try tier; the Teacher plan is $4 per month, or $36 per year. Both are priced for an individual teacher's own card, no purchase order.
Stay with Brisk when you need a free, zero-friction look at process inside Google Docs and the stakes are everyday. Use Manupropria for the assignments where the answer might need to stand up to a parent meeting, an administrator, or a hearing: the ones where "the revision history sort of suggests" isn't going to be enough. Plenty of teachers will sensibly use both.