Free AI Tools for Teachers in 2026: Plan Limits Compared

MagicSchool: the widest free toolbox

MagicSchool's Forever Free plan gives an individual teacher more than 80 teacher tools, the Raina chatbot, quizzes and class writing feedback, with basic support. The lesson plan generator and the worksheet generator are among the teacher tools the page lists. No other free plan here names a bigger toolbox.

The pricing page is also clear about what stays behind the paywall: unlimited generations, unlimited output history, unlimited AI output editing and the student tools all sit on Plus. What the page does not give is a number for free generations, so a teacher cannot tell from the pricing page how many lesson plans fit into a month on the free plan.

Who it's best for: Classroom teachers who want lesson plans, worksheets and quizzes from one place without a budget request.

Paid teacher price: Plus is $8.33 per user a month billed annually, which comes to $99.96 a year, or $12.99 a month billed monthly. Paying monthly for a full year costs $155.88, so the annual plan saves $55.92. The annual price is per user, so four teachers on the annual plan pay $399.84 a year.

The catch: The toolbox is wide, but the free plan gives no generation number, so the tool list is the only concrete allowance you can count on. Read the Plus list before you assume the free plan covers a whole school term.

Khanmigo: free for teachers, paid for students

The teacher sign-up on Khanmigo's pricing page is labelled free. The teacher side covers standards-aligned lesson planning tied to Khan Academy's content library, an on-demand summary of student work, learning objectives, rubrics and exit tickets, and access to your chat history. The page names no cap for any of it.

Who it's best for: Teachers who already work from Khan Academy content and want planning help without a budget request.

Paid price: The paid plans are for learners and families: $4 a month or $44 a year, with sales tax not included. A student who wants a personal tutor pays that price, and the teacher account stays free. Districts get a separate quote that includes rostering and single sign-on.

The catch: A free teacher account does not give students a free tutor. Plan the student side as its own purchase.

Diffit: one job, with a limited window on free

Diffit's Basic plan is free, and it does the one job the product is built for: taking a text and rewriting it at other reading levels. You can download to PDF, print, share with colleagues, and edit or adapt the results. The number to check is the window. Basic gives access to content made in the last 90 days, so older resources sit outside the free plan.

Who it's best for: Teachers with a class spread across several reading levels who need the same text rewritten for each level.

Paid price: An individual teacher subscription is $14.99 a month billed monthly, or $149.99 a year billed annually. Twelve monthly payments come to $179.88, so the annual plan saves $29.89. Schools buy a flat-rate annual plan tiered by enrollment, priced on request.

The catch: Diffit's school page says "No student logins, no student AI." Teachers make the materials, and students use what is printed or shared rather than the tool itself.

Curipod: writing practice with a character cap

Curipod's free plan costs $0 a month for every teacher. It includes unlimited student writers, standards alignment and weekly writing sessions that renew every week. The focus is writing: English and science claim-and-evidence practice, where students write, get feedback in seconds and revise. The free plan caps each written response at 1,000 characters.

The free plan leaves out PDF downloads, growth reports, shared lesson folders and single sign-on. Those sit on the School and District plan, which is priced on request. Curipod also says that no AI chatbots are available to students and that teachers control all AI output before students see it. Those are the terms to check if you are weighing a tool that students log into.

Who it's best for: Teachers who want every student to write a short constructed response each week.

Paid price: School and district plans are custom priced. The page shows no plan that a single teacher can buy alone.

SchoolAI: five launches a year on the free trial

SchoolAI labels its free tier a Free Trial, which is worth knowing before you build a unit around it. The trial includes five free trial Spaces, access to its PowerUps, tools and assistants to support teacher effectiveness, and a yearly cap on Space launches. Students work inside a Space that the teacher launches.

Count the launches before you commit. Each launch sends a Space to a class, so the cap decides how many classes get one on the free trial. Pro adds unlimited Space launches and sessions, SIS rostering and admin alert routing. The page shows no price for Pro or Scale, only a "Get started" button.

Who it's best for: A teacher who wants to run a few guided AI lessons a year and show the results before asking the school for budget.

Privacy: The pricing page says the platform is FERPA, COPPA and SOC 2 Type 2 compliant and 1EdTech certified.

Brisk Teaching: free inside Docs and Slides

Brisk's free plan costs $0 for teachers and installs as a Chrome or Edge extension. It works inside Google Docs, Slides, YouTube and your learning management system, so there is no new tab to manage. The free plan states no usage number. The Premium and Intelligence plans for schools and districts are priced on request.

Who it's best for: Teachers whose work already lives in Google Docs and Slides and who want feedback and materials without moving to another platform.

The catch: The free plan is for individual teachers. A school that wants standards alignment, admin controls and district usage visibility has to speak with Brisk before it sees a price.