What Gradarius does

Gradarius is an AI-powered adaptive learning platform that provides step-by-step calculus instruction with intelligent feedback for high school and higher education students. The platform distinguishes itself from conventional homework-grading systems by analyzing the logical approach students take to solve problems and delivering intellectual, step-by-step guidance — including hints, concept reviews, and lecture material — when students get stuck. The technology supports flexible, natural problem-solving approaches rather than rigid predefined steps, and provides professors with classroom analytics to identify common errors and adjust instruction. Founded in 2018 and headquartered in Hoboken, NJ, Gradarius operates under parent holding company Castle Point Learning Systems and serves three segments: universities (Calculus I, Calculus II, Business Calculus, College Algebra, Trigonometry), high schools (AP Calculus AB), and individual students (self-study). The platform is delivered as a web-based SaaS product with LTI-standard integration into institutional LMS environments such as Canvas, Blackboard, and Google Classroom.

The company generates revenue through two primary streams: a direct-to-consumer student subscription priced at $12 per month after a one-week free trial, and institutional licensing to universities and school districts on an annual, quote-based basis (framed as 'less than the cost of one teaching assistant'). Its go-to-market combines a self-serve PLG motion for individual students with enterprise field sales targeting professors and department heads at higher education institutions and K-12 school districts. Validated outcomes cited by the company include a 67% reduction in D/Fail/Withdraw rates at Stevens Institute of Technology (from 36% to 11%), a 30% improvement in student performance, a 25% increase in student satisfaction, and approximately 15 minutes of grading time saved per class for professors. Named institutional customers include Arizona State University, the University of Chicago, Stevens Institute of Technology, and Jersey City Public Schools; 1,350+ students have reportedly been prepared for the AP Calculus AB exam through the platform over the trailing year.

Name

Gradarius

Legal name

Gradarius

Website

https://gradarius.com

Company type

Private

Founded year

2018

Operating status

Operating

Headcount range

51–100 employees

Short description

Gradarius is an AI-powered calculus learning platform that provides step-by-step problem-solving with intelligent feedback, serving universities, high schools, and individual students preparing for AP Calculus exams.

Ownership category

akta.pro rank

Headquarters

HQ city

Hoboken

HQ country

United States

HQ region

North America

Markets served

GTM type

B2B and B2C

Offering type

Software

Cost components

Personnel, Technology or R&D, Marketing or Sales, Operations, Infrastructure

Revenue model

1. Student Subscription: Individual students pay a monthly subscription for access to AP Calculus and prerequisite courses. First week is free, then $12/month.
2. Institutional Licensing: Universities and school districts license the platform for their students. The platform is described as 'costs less than one TA', suggesting institutional pricing models.

Pricing tiers

Go-to-market motion2 records

Distribution channels3 records

Marketing channels4 records

Core offering

Gradarius is an AI-powered active learning platform for calculus and prerequisite mathematics that provides students with intellectual, step-by-step feedback on problem-solving, mirroring the pencil-and-paper approach. It delivers curriculum for Calculus I, Calculus II, Business Calculus, College Algebra, and AP Calculus AB, and is offered to higher education institutions, high schools, and individual students through web-based SaaS with LMS integration.

Product overview

Gradarius is an adaptive calculus learning platform with three distinct product offerings targeting different educational segments: Gradarius Higher Education serves colleges and universities with comprehensive calculus courses (Calculus I, Calculus II, Business Calculus, College Algebra); Gradarius AP Calculus serves individual students preparing for AP Calculus AB exams; and Gradarius High Schools serves high school educators with customizable AP Calculus curriculum. All three products leverage AI to provide step-by-step feedback and intellectual guidance, though they differ in target audience and customization features.

Differentiator

Problem solved

Functional benefit

Brands

• Gradarius for Higher Ed: Calculus learning platform for higher education institutions
• Gradarius for High Schools
• Gradarius for Students

Products and services

• Gradarius Higher Education Active learning calculus platform for higher education institutions providing students with intellectual, step-by-step feedback on their mathematical work. Includes courses for Calculus I, Calculus II, Business Calculus, and College Algebra, used by universities such as ASU, UChicago, and Stevens Institute of Technology.
• Gradarius High Schools AP Calculus AB preparation platform for high school educators and students, offering customizable assignments and problems that can be tailored to specific solution approaches and scoring criteria. Deployed at K-12 districts such as Jersey City Public Schools.
• Gradarius AP Calculus (Student Version) Self-serve AI-powered AP Calculus AB exam preparation platform for individual students with step-by-step problem-solving practice, instant feedback, hints, and a free first week followed by $12/month subscription.

Quantifiable outcome

• 67% reduction in DFW rates (from 36% to 11%)
• +4 more outcomes

Named customers4 records

Segments3 records

Ideal customer profiles3 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Integration1 record

AI capability3 records

Feature5 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Stevens Institute of TechnologycoreStrategic or Co-development PartnerHome institution of founders Alexei Miasnikov and Alex Miasnikov. Professor Dr. Denis Serbin serves as Affiliate Associate Professor of Mathematics. Platform developed with input from mathematics faculty. Case study institution showing 67% DFW rate reduction.
• Arizona State UniversitycoreStrategic or Co-development PartnerAdrian Sannier, previously Professor of Practice in Fulton Schools of Engineering, is part of the team. ASU is a pilot university and customer using Gradarius platform.
• Bar-Ilan UniversitycoreStrategic or Co-development PartnerProfessor Helen Bunina from Bar-Ilan University's Department of Mathematics is part of the founding team.
• The University of ChicagominorGTM or Marketing PartnerPartner university using Gradarius platform for calculus instruction. Listed in customer logos.
• Jersey City Public SchoolsminorGTM or Marketing PartnerK-12 school district customer using Gradarius for AP Calculus preparation. Listed in customer logos.

Scale indicators5 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Carnegie Learning: Adaptive math platform with higher-ed and K-12 products (MATHia) that provide step-by-step tutoring and analytics. Overlaps directly with Gradarius on calculus instruction, institutional licensing, and learning outcomes reporting.
• Wolfram Alpha: Computational engine widely used by calculus students and professors for step-by-step solutions. Direct substitute for Gradarius's intellectual feedback use case, particularly for self-study AP Calc and university calculus.
• ALEKS (McGraw Hill): Adaptive math learning platform widely used in US higher education and K-12. Closest direct competitor to Gradarius for institutional calculus and prerequisite math courses, with comparable AI-driven step-by-step assessment and strong university distribution.
• Photomath: Mobile-first step-by-step math tutoring app used heavily by high school and college students. Competes with Gradarius's student self-study product for AP Calculus and intro-college math.
• Mathspace: Adaptive math platform with step-by-step feedback and school/district licensing. Directly comparable to Gradarius on the K-12 and higher-ed calculus use case with similar AI-driven feedback model.
• Symbolab: Step-by-step math solver covering calculus, algebra, and trigonometry with both consumer and pro tiers. Comparable to Gradarius on the consumer/self-study calculus journey.

Broad incumbents

• IXL Learning: Large-scale subscription math and English practice platform with deep K-12 penetration. Less depth on calculus-specific step-by-step reasoning but competes for school district math budgets.
• Khan Academy: Free, broadly adopted learning platform with calculus content and an AI tutor (Khanmigo). Significant indirect competitive pressure on Gradarius's free-trial-driven student funnel.
• Pearson MyMathLab: Dominant higher-ed math homework and assessment platform bundled with Pearson calculus textbooks. Major competitor in university calculus adoption decisions.

Emerging players

• Brilliant: Subscription STEM learning platform with interactive problem solving. Comparable to Gradarius's student-facing product for self-directed math learners, though lighter on formal calculus curriculum.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights7 records

Customer concentration

• LinkedInlinkedin.com/company/gradarius

Revenue estimate

Valuation estimate

Number of profiles

Profiles4 records

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Gradarius