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Piazza

Palo Alto, California, United States

What it is

Piazza is a Q&A platform connecting students, teaching assistants, and professors around coursework. Its wiki-style format lets a class edit responses while keeping one student answer and one instructor answer for each question. Students can post anonymously to classmates, or anonymously to the instructor when the instructor allows it; instructors can endorse questions and answers. Course pages can hold announcements, course information, syllabi, assignments, lecture notes, and links. Instructors can review reports showing who asked, answered, edited, or read, and when questions arose during the term. Piazza supports Blackboard, Moodle, Sakai, Desire2Learn, Canvas, Jenzabar, and Angel. With LMS integration, course rosters can automatically enroll users with appropriate roles, and users can sign in through the LMS. Web, iOS, and Android access is available, with class alerts in the mobile apps. The free plan is contribution-supported; paid instructor licenses start at $379 a month, billed per term. K-12 classes and classes with up to 25 students do not require licenses.

For and against

For

  • Wiki-style Q&A keeps one student and one instructor answer per question.
  • Students can post anonymously to classmates.
  • LMS rosters can automatically enroll users with roles.
  • Mobile apps provide class alerts.

Against

  • Polls, statistics, and class locking require a paid license.
  • Paid instructor licenses start at $379 a month, billed per term.

The verdict

Piazza pairs coursework Q&A with course materials, LMS enrollment, and instructor participation reports. The free plan is available, while some course tools require a paid license.

Who it suits

Piazza suits instructors and students who need a shared space for coursework questions and course resources. Its LMS integrations and participation reports may also suit instructors managing class engagement.

Plans and prices

Contribution-supported

Free

Polls, statistics and class locking excluded · no ads

Instructor license (up to 400 students)

$379one-time

400 student maximum · covers all students in instructor classes

Instructor license (up to 700 students)

$429one-time

700 student maximum · covers all students in instructor classes

Instructor license (unlimited)

$479one-time

Unlimited class size · covers all students in instructor classes

Department license (up to 2,000 students)

$9,000a year

Up to 2,000 students · unlimited classes per student

Department license (up to 3,000 students)

$12,000a year

Up to 3,000 students · unlimited classes per student

Contribution-supported model

Free

Optional contribution prompts · polls, statistics, and class locking require a paid license

Instructor license — 400-student maximum

$379usage-based

400 student max class size

Instructor license — 700-student maximum

$429usage-based

700 student max class size

Every plan, in full

On the record

Anonymity and endorsements
Students can post anonymously to classmates, or anonymously to the instructor if the instructor allows it, and instructors can endorse questions and answers.piazza.com · read 7 Oct 2026
Anonymous participation
Users can post anonymously to classmates and, where enabled, anonymously to instructors.talent.piazza.com · read 15 Oct 2026
API availability
GetApp states that Piazza has no available API, while third-party projects describe unofficial clients for its internal API.getapp.com · read 15 Oct 2026
Class locking
A premium lock feature lets instructors schedule lock dates and times for posting.support.piazza.com · read 15 Oct 2026
Class statistics
The support center documents instructor class-statistics viewing and statistics export tools.support.piazza.com · read 15 Oct 2026
Collaborative answers
Piazza uses community-edited wiki-style Q&A with a single student answer and a single instructor answer for each question.piazza.com · read 7 Oct 2026
Company facts
LinkedIn lists Piazza as privately held, founded in 2009, headquartered at 101 University Ave in Palo Alto, California, with 11–50 employees.linkedin.com · read 15 Oct 2026
Company legal name
The privacy policy identifies the maker as Piazza Technologies, Inc.piazza.com · read 15 Oct 2026
Company products
Crunchbase describes Piazza Q&A and Piazza Network, and lists Pooja Sankar as founder and Ethan O’Rafferty as CEO.crunchbase.com · read 15 Oct 2026
Course tools
Course pages can host announcements, course information, syllabi, and resources such as assignments, lecture notes, and links.piazza.com · read 7 Oct 2026
Data practices
The privacy policy says Piazza collects device, usage and location information and uses service vendors for storage, analytics, billing and security.piazza.com · read 15 Oct 2026
Help documentation
The help center lists instructor, student, mobile, accessibility, integrations, licensing and Teams sections with dozens of articles.support.piazza.com · read 15 Oct 2026
Instructor endorsements
Instructors can endorse answers to steer the class toward reliable responses.piazza.com · read 15 Oct 2026
LaTeX and code
The product advertises a LaTeX editor, syntax highlighting and code blocks.piazza.com · read 15 Oct 2026
License exceptions
The paid-model page says K-12 classes and classes with up to 25 students do not require licenses.support.piazza.com · read 7 Oct 2026
Limit: Android feature gaps
Google Play reviews report teammate search failures, update-related lockouts, difficult link sharing and no convenient pinning.play.google.com · read 15 Oct 2026
Limit: missing assessment tools
Software Advice reviews cite absent timed quizzes, grading, course calendars, assignment submission and plagiarism detection.softwareadvice.com · read 15 Oct 2026
Limit: mobile app
App-store reviewers report sluggish or buggy mobile behavior, missing desktop features, failed uploads and login or loading problems.apps.apple.com · read 15 Oct 2026

The review

Piazza is a course Q&A service for students, teaching assistants, and instructors who want to work through coursework in a shared space. It is most compelling for courses that can use its LMS enrollment and sign-in integrations; instructors should weigh the paid-license requirements and class-size ceilings before relying on its additional controls.

Overview

Piazza puts coursework questions and course materials in one class space. Its defining choice is a shared, editable student answer alongside a separate instructor answer for each question. That can keep corrections and explanations consolidated, but classes that prefer a conventional stream of individual replies may find the format restrictive.

Students can ask anonymously to classmates, or to the instructor when the instructor permits it. Instructors can endorse questions and answers, adding a way to recognize useful contributions while retaining a distinct instructor response.

Key features

Course pages can hold announcements, course information, syllabi, assignments, lecture notes, and links. This makes Piazza useful as a companion course hub rather than just a question board. Its LMS integrations include Blackboard, Moodle, Sakai, Desire2Learn, Canvas, Jenzabar, and Angel; connected courses can automatically enroll users with appropriate roles and allow sign-in through the LMS. That is a practical advantage for institutions already using one of those systems.

Instructors can review who asks, answers, edits, or reads, and when questions arise during the term. That visibility can help instructors follow participation patterns, but it is not the same as access to every course control: polls, statistics, and class locking require a paid license.

Piazza says its iOS and Android apps provide class alerts and keep users connected to class. It also states that student email addresses and enrollment information are accessible only to class instructors, and that universities have verified its Q&A platform facilitates FERPA compliance. Piazza says it uses technical, administrative, and physical safeguards to protect information. These are company statements, not a substitute for an institution's own privacy and security review.

Pricing

The contribution-supported model is free, with optional contribution prompts. It covers the free plan, but polls, statistics, and class locking require a paid license. K-12 classes and classes with up to 25 students do not require licenses, an important exception for smaller courses.

Instructor licenses are billed per term, with payment due three weeks after the class start date. The 400-student maximum plan costs $379 a month; the 700-student maximum costs $429 a month; and unlimited class size costs $479 a month. These plans fit instructors who need paid course controls at their respective class sizes. The published student limit is 400, so larger classes need the higher-capacity tier rather than assuming the basic limit scales up.

The department license costs $12,000 a year, billed per year, and covers up to 3,000 students with unlimited classes per student in the department. It is aimed at department-wide use rather than a single instructor's course. The enterprise site license has custom pricing for an institution- or school-level license. No trial period is stated.

Platforms

Piazza is available on web, iOS, and Android. Its mobile apps are suited to students who want class alerts on a phone, while web access serves users working from a computer.

Who it's for

Piazza suits instructors and students who want a collaborative coursework Q&A space, particularly when the course already uses a supported LMS and benefits from roster synchronization. Its participation reports also make it relevant to instructors who want to see how students engage over the term. It is a weaker fit for classes that need paid controls without a license, exceed the chosen tier's student cap, or want a many-reply discussion structure.

Pros and cons

  • Pro: A shared student answer plus an instructor answer keeps a question's collaborative work and teaching response together.
  • Pro: Supported LMS integrations can handle course enrollment and sign-in, reducing separate access steps for connected classes.
  • Pro: Course pages combine Q&A with syllabi, announcements, assignments, notes, and links.
  • Con: Polls, statistics, and class locking require a paid license, limiting what the free plan can do for course management.
  • Con: Instructor licenses have distinct class-size ceilings, and larger capacities cost more per month during the term.
  • Con: The single shared student answer is less appropriate for courses that depend on a conventional thread of separate replies.

Alternatives

Classroom Management Software is a broader category to explore when Piazza's coursework Q&A focus is not the only requirement.

Apple Classroom is a free iOS and macOS option for readers who want a classroom app rather than Piazza's Q&A and course-material setup.

ClassDojo offers a free core experience centered on teacher messaging, class points, and class story updates; choose it when those classroom communication tools matter more than shared coursework answers.

LiveSchool has a free school-year pilot with SSO and rostering, all features, one grade level, and up to one school year; consider it when a limited pilot is the priority.

Classwize is another paid classroom software option.

Lightspeed Classroom is sold by personalized quote and is included in Lightspeed's integrated ecosystem, which may suit schools already considering that ecosystem.

GoGuardian Teacher uses custom pricing based on enrollment, product bundles, contract length, and professional services.

SchoolMint Hero offers flexible packages for individual schools and districtwide rollouts, with pricing varying by school size and number of users.

Deledao ActiveScan is priced by request and offers a demo.

Verdict

Choose Piazza for courses that need shared, editable answers, instructor participation visibility, and LMS-connected enrollment in one class space. Its strongest reason to choose is the combination of collaborative Q&A and course materials; look elsewhere if your class needs a conventional reply thread or if paid controls and class-size limits do not fit your course.

Alternatives to Piazza

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