See why 100,000+ teachers and 16,000+ schools choose CoGrader for faster, privacy-first feedback. Research supported by IES · U.S. Department of Education. Backed by UC Berkeley SkyDeck. SOC 2 Type 1 certified.
Research-backed: In a June 2026 STAAR validation study, 98.5% of CoGrader scores landed within one point of official TEA raters, and a U.S. Department of Education award funds our research. See the research
A complete look at how the two platforms compare across the features that matter most to teachers, schools, and districts.
* Based on publicly available information as of October 6, 2026. This page is not affiliated with or endorsed by EssayGrader AI.
CoGrader scored 600 STAAR responses that TEA scored and published to train its own raters, across eight scoring modules. Here is how close CoGrader came to the official scores.
within one point of the official TEA score, pooled across eight modules
TEA’s own agreement standard for two human raters
exact match with the official TEA score; 72.4% on extended responses alone
Two trained TEA raters agree exactly 63% to 75% of the time
per response, with rubric-aligned feedback attached
Hand scoring runs 15 to 20 minutes per essay
June 2026 technical report by the CoGrader research team. Not peer reviewed. TEA rater-training samples are clearer than typical classroom writing, so read these results as a ceiling.
CoGrader was purpose-built for K-12 schools, not just individual teachers. That difference shows up in every feature.
CoGrader is supported by the Institute of Education Sciences to accelerate student writing proficiency through AI-assisted personalized feedback. See the award
CoGrader is an alumnus of the UC Berkeley SkyDeck accelerator. See the SkyDeck profile
CoGrader includes the academic standards for all 50 states, so you can generate a rubric from the standards you actually teach, or start from STAAR, B.E.S.T., CAASPP, Regents, Common Core, and AP rubrics.
CoGrader is SOC 2 Type 1 certified, and the full audit report is public. FERPA/COPPA/SOPIPA compliant, and student data is never used to train AI. EssayGrader's own FAQ answers "Do you have SOC 2?" with "Not yet. SOC 2 Type 1 is in progress." Read our SOC 2 report
Multi-school dashboards, PO purchasing, W-9 documentation, data privacy agreements, and native Google Classroom, Canvas, and Schoology sync.
CoGrader works like a teaching assistant: it drafts a score and criterion-level feedback against the rubric the teacher chose. The teacher reviews, edits, and approves before anything reaches a student.
CoGrader's free tier covers 150 essays per month. EssayGrader's free plan covers 100. CoGrader lets you run the full workflow with your classes before spending a dollar.
Not every class is 1-to-1 with devices. On CoGrader you can import handwritten work from a copier, take pictures, pull it in from your LMS, and more, so timed writes, blue books, and mixed classrooms grade the same way digital work does. See how handwritten grading works.
In a June 2026 validation on 600 STAAR responses scored by the Texas Education Agency, CoGrader landed within one point of TEA raters in 98.5% of cases across eight scoring modules. The whitepaper, with its sample, method, results, and limits, is a free PDF download. Read the research
“[CoGrader] enhance[s] the grading process by ensuring that teachers can provide detailed and thoughtful feedback in a timely fashion.”Edutopia
“…[CoGrader] has saved him hours on grading and allowed him to spend more time giving personalized comments.”Chalkbeat New York
“…teachers say AI helpers can provide consistency and remove bias from assessments of student work.”The Wall Street Journal
Also featured in
Six reasons CoGrader fits real K–12 classrooms — from state test prep to data-driven lesson planning.
Prepare students for STAAR, B.E.S.T., CAASPP, Regents, and more from CoGrader's state standards library, then generate a rubric from the standards you teach.
Shorten the feedback loop from weeks to 1-2 days, helping students stay engaged and improve faster throughout the semester.
Provide individualized, quality feedback on every essay, while freeing up the time you'd otherwise spend at the kitchen table on weekends.
Tailor feedback to each student's unique needs and support differentiated learning without adding complexity to your workflow.
Minimize human bias with CoGrader's rubrics-based objective grading system. Every student gets the same standard, applied consistently.
Get a data-driven view of your class's performance to identify learning gaps and tailor instruction.
CoGrader has two-way sync with Google Classroom, Canvas, and Schoology. EssayGrader integrates with all three.
Handwritten essays
Import from a copier, take pictures, pull work in from your LMS, and more. See how it works
CoGrader abides by FERPA, COPPA, SOPIPA, Ed Law 2D, and other state privacy laws to safeguard student data.
Only de-identified student work and rubrics are shared with the AI. LLM/AI models contractually cannot use student data for training purposes.
CoGrader's systems and data meet SOC 2 Type 1 standards, and the full audit report is public. EssayGrader's Trust Center lists its SOC 2 Type 1 as in progress.
CoGrader is used in 16,000+ schools and rated highly for accuracy, feedback quality, and AP alignment.
Co-workers, students and I compared CoGrader with a variety of other AI scoring for AP essays, and yours is BY FAR the most accurate — with the best feedback. I score for the AP Exam myself.
I started my free trial and I LOVE it. I had 85 sixth grade students write a narrative that would have taken me weeks to grade. With CoGrader, they were graded with amazing feedback in, literally, seconds.
I am excited to assign more writing now that I can give specific and objective feedback more quickly. I may even postpone my retirement because of your product. I am 61, and now I think I can make it to 65.
CoGrader vs EssayGrader AI: everything you need to know before switching.
CoGrader publishes its accuracy research. In a June 2026 validation on 600 STAAR responses scored by the Texas Education Agency, CoGrader's scores landed within one point of TEA raters in 98.5% of cases across eight scoring modules, benchmarked against the scoring guides TEA uses to train its own raters. The technical report is public at cograder.com/research/staar and is not peer reviewed. CoGrader drafts the score and feedback; the teacher reviews, edits, and approves before anything reaches a student.
CoGrader includes a state standards library for all 50 states, so you can generate a rubric from the standards you teach, including STAAR (Texas), B.E.S.T. (Florida), CAASPP (California), New York Regents, and Common Core. EssayGrader publishes a library of 800+ pre-built rubrics. You can also upload any custom rubric in both tools.
Yes. CoGrader offers native integration with Google Classroom (all users), Canvas, and Schoology (school/district accounts). EssayGrader also integrates with all three; it announced on October 1, 2026 that its Schoology integration is out of beta.
CoGrader is SOC 2 Type 1 certified, FERPA/COPPA/SOPIPA/Ed Law 2D compliant, and has a published third-party cybersecurity audit. Student data is anonymized before AI processing and is contractually prohibited from being used for model training. CoGrader will also sign your school's data privacy agreement. EssayGrader states FERPA, COPPA, and CCPA compliance; its own FAQ says its SOC 2 Type 1 is in progress.
Yes. CoGrader accepts purchase orders, provides W-9 documentation, and can sign your district's data privacy agreement. EssayGrader also offers school and district licenses and a W-9 on request.
Yes. CoGrader offers AI professional development programs for teachers and schools, helping educators integrate AI grading responsibly into their practice. EssayGrader offers live onboarding at purchase and certification courses.
Absolutely. CoGrader has a free plan for individual teachers (no credit card required). You can start grading essays immediately using your own rubric or one generated from your state standards. For schools and districts, we offer a personalized demo and assisted onboarding.
100,000+ teachers and 16,000+ schools use CoGrader for better feedback, faster, backed by the privacy standards schools actually require.
This comparison page is not affiliated with, associated with, or endorsed by EssayGrader AI / Tech Nest Ventures Inc. Feature data is based on publicly available information as of October 6, 2026.
