CrowdGrader

CrowdGrader is a web service for submitting homework and collaboratively peer-grading assignments. Students submit work and review other submissions, while instructors monitor assignments and retain control of final grades. The system combines peer assessments into a consensus grade and removes outliers; a student's crowd-grade also reflects how accurately they grade classmates' work. Students can write reports, math, or code in a built-in editor, or submit files such as ZIP archives. Reviews are anonymous: reviewers do not see submission authors' identities, and uploaded files are renamed. Instructors can inspect clusters of similar submissions and compare work side by side. Institutional subscriptions include optional Learning Management System integration, access monitoring, and long-term data retention for auditing. Student work is transmitted over HTTPS, and Google authentication uses only the user's email address for identification. The free instructor-sponsored plan costs nothing per assignment for up to 20 students. Listed paid options include $2.99, paid once for up to 35 students and $6.99, paid once for up to 100 students.

CrowdGrader combines peer assessment with instructor oversight, anonymity, and tools for reviewing similar submissions. Assignment costs depend on plan and class size, while the free instructor-sponsored option covers up to 20 students.

CrowdGrader suits instructors managing assignments and students who can benefit from peer feedback and practice reviewing others' work. Its web-only format and instructor-sponsored free plan may fit classroom assignments.

Overview

CrowdGrader is a web-based peer-assessment workspace for courses in which students submit work, review classmates, and receive instructor-supervised grades. It is best for educators managing substantial enrollment who want reviewing to be part of learning and assessment, while retaining authority over final marks. Its strongest advantage is a defined, anonymous workflow that makes students accountable for both the work they submit and the quality of their reviews; the main compromises are per-assignment charges beyond the smallest free tier and a minimum age of 13.

Key features

The grading model goes beyond averaging peer scores. CrowdGrader combines the grade a submission receives with the reviewer’s accuracy on other submissions, calculates a consensus result, and removes outliers. Students therefore have a reason to grade carefully, while instructors can still adjust or control final grades. Rubric scoring, automatic review allocation, and moderation tools provide a repeatable assignment process rather than an improvised exchange of comments.

Students can compose reports, mathematics, and code in the integrated editor, or upload files, including ZIP archives. Reviews use one-way anonymity: reviewers do not see authors’ identities, and uploaded filenames are changed to help preserve that separation. This is useful when candid criticism matters, although it does not promise mutual anonymity for every participant.

The monitoring view compares submissions, groups similar work into clusters, and offers side-by-side inspection. Those controls give instructors a practical way to identify overlap that warrants closer attention. Institutional subscriptions add optional integration with an existing learning-management system, access monitoring, and long-term retention for audit purposes. Student work is transmitted through HTTPS. Google provides sign-in, and CrowdGrader says it uses only the account email for identification rather than accessing other Google account information.

Pricing

The free instructor-sponsored plan costs $0 per assignment for up to 20 students. It is the sensible starting point for small classes or a pilot, but every assignment is subject to that cap.

For a little more headroom, Small costs $2.99 once per assignment and supports up to 35 students. Medium costs $6.99 once per assignment for up to 100 students. Large costs $13.98 once per assignment with unlimited students, making it the straightforward choice when enrollment varies or exceeds the smaller quotas. These paid instructor-sponsored tiers charge per assignment, so recurring courses should budget for each assignment rather than a single annual license.

The student-supported assignment option is $1.99 per six months (shown as $1.99 a year in the plan label), with a non-refundable fee; the access period determines when students may submit. It shifts payment to students and is suited to courses where instructor sponsorship is not available, but the non-refundable term is less flexible when schedules change.

Institutional licensing uses custom pricing based on predicted or past usage. All affiliated instructors can use CrowdGrader without charge under that arrangement, alongside the institutional integrations, monitoring, and retention provisions. A 21-day trial is available, while the free instructor-sponsored tier has no stated trial-renewal requirement.

Platforms

CrowdGrader runs on the web. Google authentication keeps account setup tied to an email identity, but no native mobile platform is provided.

Who it's for

Instructors running large or discussion-oriented classes can use peer review to extend feedback capacity while keeping final-grade control. The service reports successful use around 800 students and invites inquiries for classes numbering in the tens of thousands, with no stated maximum. Students benefit when practicing evaluation and receiving feedback from peers is part of the course design. Users must be at least 13, and the terms prohibit use if any participating student is younger.

Pros and cons

Pros

• Review quality affects grades: combining received marks with grading accuracy rewards thoughtful reviewers.
• Consensus with outlier removal: peer results are less vulnerable to an isolated extreme score.
• Strong submission flexibility: an editor for reports, math, and code plus ZIP uploads accommodates varied coursework.
• Instructor oversight: moderation, similarity clusters, side-by-side comparison, and control of final grades support accountable use.
• Scales broadly: plans cover 20 students free through an unlimited-student assignment, with institutional options for very large programs.

Cons

• Per-assignment billing: costs accumulate across a busy term unless an institution sponsors usage.
• Small free cap: classes above 20 students must move to a paid tier.
• Non-refundable student term: the six-month access fee offers limited flexibility after purchase.
• Web-only access: there is no dedicated iOS or Android app.
• Age restriction: courses involving anyone under 13 cannot use the service.

Alternatives

Peer Assessment Software is the broader category guide for comparing peer-review tools.

Marka is a freemium Android and web option whose free Basic plan covers up to three classes and 50 students per class, but limits reporting to a full-preview view.

PeerEval is a paid iOS and web alternative for teams that need those platforms.

PeerAssessment.com offers Android, iOS, and web access, a trial supporting one class and up to 100 students, and paid class units.

Kritik360 is a web freemium service with free educator access and paid scholar features.

Eli Review provides unlimited free instructor access on the web, with student term access sold separately.

Student Peer Review offers a six-month free web plan for one course, 50 students, and 10 assessments, plus a trial AI tier.

PeerEvals is a free web service with no paid tier required for its core function.

TEAMMATES is a free web alternative whose service may change or end at its provider’s discretion.

Verdict

Choose CrowdGrader when you need structured, anonymous peer assessment that can scale from a small class to very large enrollment while keeping instructors in charge of final grades. Its reviewer-accountability model and similarity-monitoring tools are the key reasons to choose it. Look elsewhere if you require native mobile apps, a permanently free plan above 20 students, or pricing that does not recur with each assignment.