ComPAIR vs CrowdGrader
ComPAIR
github.comCrowdGrader
crowdgrader.comSide by side
| Figure | ComPAIR | CrowdGrader |
|---|---|---|
| Price from | — | $0.17/mo |
| Free plan | — | Yes |
| Free trial | — | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| Self-hosted | Yes | — |
| Plans published | 0 | 11 |
| Spec score · Peer Assessment Software | 7.8 (#7) | 9.0 (#1) |
| Authentication | Documented login options include username and password, CAS, SAML 2.0, and LTI, with at least one authentication option required. | Users sign up and log in with a Google account; CrowdGrader says it uses the email address but not the Google password. |
| Integrations | The application supports LTI login and course membership and grade updates for LTI consumers. | Institutional subscriptions include optional integration with existing Learning Management Systems; the pricing page does not name specific systems. |
| Purpose | ComPAIR is a peer review application that pairs student answers so students can compare peer work and give feedback. | CrowdGrader lets students submit and collaboratively peer-grade homework, while instructors monitor assignments and retain control of final grades. |
| Support | The ComPAIR site says its support site has moved to compair.open.ubc.ca. | The maker's homepage provides a contact email and phone number, and educator testimonials describe responsive help from the founder. |
Plans
CrowdGrader
- FreeFree
- Free (instructor-sponsored)Free
- Student subscription$1.99 a year
- Student-supported assignment$1.99 a year
- Small$2.99, paid once
- Small (instructor-sponsored)$2.99, paid once
- Medium$6.99, paid once
- Medium (instructor-sponsored)$6.99, paid once
- Large$13.98, paid once
- Large (instructor-sponsored)$13.98, paid once
In their own words
ComPAIR
ComPAIR is a self-hosted web application for peer review in which students compare pairs of work and give feedback with both answers in view. Instructors can enable adaptive scores based on comparison outcomes and use them to assemble later pairs. The application has student, instructor, and system administrator roles with distinct permissions, plus rubric scoring and moderation tools. It supports LTI login, course membership, and grade updates; administrators configure LTI consumers with a key and secret. Documented authentication options also include username and password, CAS, and SAML 2.0. Learning analytics can be sent to a Learning Record Store through xAPI or Caliper, though both are disabled by default. The default attachment limit is 250 MB, with PDF, audio, video, and image extensions allowed. Administrators can manage whether instructors see student email addresses and CAS/SAML usernames; those fields are disabled by default. ComPAIR is open source under GPL-3.0 and freely available to download, install, and use. Its README documents deployment with Docker Compose, with access at localhost:8080. The tool is described as suitable for higher education and K-12 communities.
CrowdGrader
CrowdGrader is a web service for students to submit homework and peer-grade classmates’ work while instructors oversee assignments and keep control of final grades. It combines peer assessments into a consensus grade for each submission and removes outliers. A student’s crowd-grade reflects both the grade received and how accurately that student grades other submissions. Students can create reports, math, or code in the built-in editor, or upload files such as ZIP archives. Reviews are anonymous: reviewers do not see authors’ identities, and uploaded files are renamed. Instructors can monitor similarities through clusters and side-by-side submission comparisons. Institutional subscriptions include optional LMS integration, access monitoring, and long-term data retention for auditing. Student work is transmitted over HTTPS; Google authentication uses only the user’s email address for identification. The free instructor-sponsored plan covers up to 20 students per assignment. Other listed options include $2.99 per assignment for up to 35 students, $6.99 for up to 100, and $13.98 for unlimited students.