CoGrader
AI-assisted essay grading aligned to rubrics
We publish a full Four-Mismatches fit assessment for the student-facing exam tools first. For this one, the facts below are what we have verified — run the Four Mismatches Test on it yourself for your own students.
Independence: Addestra builds learning products too (MathsTutor, TinkerWell). We never review or score our own, and no tool pays to be listed or to rank higher — how we assess fit.
What it does
What the AI actually does — An LLM evaluates essays against a teacher-supplied or AI-generated rubric, producing a score plus targeted feedback per criterion.
Why it was built — Speed up essay grading — score against a rubric and return specific feedback in a fraction of the time.
Who built it
- Company
- CoGrader
- Founders
- Gil Quadros Flores · Gabriel Adamante · Vitor Barbosa
- HQ / origin
- [TBD] (New York vs Bay Area — sources conflict)
- Founded
- 2023
- Model
- B2C / B2B
- Languages
- English
- Pricing
- Freemium
We record durable facts only — no funding-raised or user-count figures. Unverified fields are marked [TBD] rather than guessed.
Where it sits
CoGrader is on the EdTech AI 100 map, in assessment & academic integrity, built in United States.