Brisk Teaching vs Diffit: A Teacher’s Comparison, Tested on the Same Brief

Last Tuesday at 3:15 PM, my fourth-period intervention group left behind twelve crumpled drafting sheets and one very clear reality. I had twenty minutes before department meetings started, and I needed three distinct reading levels for the next morning's article on marine ecosystems. I did not want to log into another standalone dashboard, copy-paste text into a blank window, and manually format three separate PDFs. That is the exact friction point where most teachers start looking at a head-to-head comparison like Brisk Teaching vs Diffit.

Both platforms promise to slash lesson prep time, but they live in entirely different parts of your browser. Brisk Teaching is a Chrome extension that embeds itself right into Google Docs, Slides, and web articles. Diffit is a dedicated web app built to transform any piece of text, URL, or YouTube video into leveled reading materials with ready-made vocabulary and comprehension tasks. To figure out which one deserves a spot in your weekly workflow during the 2026-11-13 school year, I ran both through the exact same classroom brief: adapting a dense science article for a mixed-ability seventh-grade room.

The Chrome Extension Reality of Brisk Teaching

Brisk Teaching wins points for proximity. Because it sits inside your browser as an extension, you do not leave the Google Doc you are already typing in. Click the Brisk icon, and a side panel opens to let you generate reading levels, quiz questions, or inline student feedback without opening a new tab.

The reported strengths are real. There is no copy-pasting between tools, which saves your sanity when you have twenty tabs open. The feedback tool lets you highlight student text in a Google Doc and drop specific, constructive comments right into the margin. The learning curve is gentle enough that you can figure it out during a ten-minute planning period.

The limitations show up when your tech department gets involved. Those extension permissions require IT approval, and if your district locks down Chrome extensions tightly, you might hit a wall. The free tier offers a limited number of actions per month, which you will burn through by Thursday afternoon if you use it heavily. The paid tier runs around $10 per user per month, which is reasonable if your school reimburses it, but out of pocket for a lot of educators. Furthermore, because the extension reads document content to function, you need to review the vendor data privacy agreement and scope carefully. For those building a broader suite of tools, you might also look at our review of best AI tools for teachers 2026 to see how extension-based workflows compare to standalone platforms.

The Web App Focus of Diffit

Diffit takes the opposite approach. Instead of living inside your docs, it is a standalone workspace designed around one core superpower: leveling content. Paste a URL, drop in a PDF, or link a YouTube video, and Diffit spits out a leveled text passage, vocabulary lists, and question sets in seconds.

The platform shines brightest in mixed-ability classrooms. If you have students reading at a third-grade level sitting next to kids reading at an eighth-grade level, Diffit lets you click a button and generate the same core content at five different Lexile levels. It produces both printable worksheets and digital versions that export cleanly to Google Forms or Google Classroom.

Prompt entered into Diffit:
"Level this article on marine ecosystems for a 6th-grade reading level, include 4 multiple-choice questions, and focus on vocabulary words related to coral reefs."

First output from Diffit:
A clean three-paragraph text about coral reefs with four standard multiple-choice questions, plus a list of five vocabulary terms with definitions.

Two edits that made it usable:
1. Swapped out two vocabulary definitions that were too academic ("zooxanthellae symbiosis") for simpler student-facing definitions.
2. Rewrote question three because the distractor options were too obviously wrong for middle schoolers.

The trade-offs are straightforward. Diffit has a narrower scope than all-in-one platforms like Brisk. It is not an inline feedback tool for student drafts. The leveling is approximate, driven by AI, so it is not a formal diagnostic assessment. Heavy daily use burns through the free quota quickly, and the paid tier sits around $15 per user per month. As always with student content, avoid pasting identifiable student work into the prompt and check your district data policy. For another angle on specialized creation tools, read our breakdown on Brisk Teaching vs Magicschool.

Where Writesonic and SchoolAI Fit

While Brisk and Diffit dominate lesson creation, other names pop up in staff room conversations. Writesonic is a budget-friendly writing and content generation tool coming in at around $16 per user per month on its paid tier. It offers plenty of templates and a reasonable free trial, but the output tends toward generic classroom language. The credit system is confusing, and it lacks true education context, making it less useful for direct student-facing work.

SchoolAI approaches the problem from a safeguarding angle. Priced around $15 per user per month, it provides a school-safe AI workspace with teacher-controlled student spaces. It is designed for district approval with strong safeguarding defaults and great teacher visibility into student use. The catch is that it requires school-wide buy-in rather than individual teacher adoption, and pricing is mostly quote-based for districts.

Handling Paper Workflows and Institutional Suites

Many classrooms still rely on paper packets, which complicates AI adoption. Class Companion tackles this by providing AI feedback on handwritten and scanned student work for about $12 per user per month on its paid tier. It is useful where work is done on paper, offering fast, specific comments and solid math support. The main limits are practical: scan quality directly affects accuracy, and the feedback still requires your final review before handing papers back.

At the institutional level, Turnitin Clarity and Feedback Studio handle writing feedback and similarity checking. There is no free tier, and individual teachers cannot buy it directly because pricing requires custom enterprise quotes. While it provides consistent institutional workflows and detailed revision histories, AI detection remains contested, and the administrative setup is heavy.

Making Your Choice for the Term

If you live inside Google Docs and want inline feedback without opening twenty browser tabs, install Brisk Teaching. It is the best choice for student-safe deployments where your IT department gives the green light. If your main bottleneck is differentiating texts for a room full of diverse reading abilities and you want parent-facing materials fast, open up Diffit.

Neither tool will run your classroom for you. Both require that critical five-minute human sweep before anything lands in a student's hands. Pick the one that matches where you already do your planning, and save yourself twenty minutes tonight.

FAQ

Brisk Teaching or Diffit for lesson planning?

Brisk Teaching for breadth and speed, Diffit when the output goes to a colleague or a family and has to be right first time.

Which is cheaper for one teacher?

Compare the free quotas first, then the individual plans. In most weeks the free plan decides the purchase, not the list price.

Do they produce the same output?

On simple tasks, often yes, and that is a useful result: it points at the cheaper, better-governed option rather than the one with more features.

Sources

• Brisk Teaching Vendor Pricing and Features Page. briskteaching.com
• Diffit Product Overview and Leveling Specifications. diffit.me
• Writesonic Education and Content Plans. writesonic.com
• SchoolAI Safeguarding and District Deployment Documentation. school.ai
• Class Companion Paper Scanning and Feedback Specifications. classcompanion.com
• Turnitin Feedback Studio Institutional Documentation. turnitin.com