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Head-to-head · Automated Grading Software

PrairieLearn vs TAO

  • Updated Oct 2026
  • Both researched from official sources
  • 6 checks side by side
Higher score PrairieLearn #1 in Automated Grading Software 9.2/10 Free plan Free plan✓ 5 of 5 features Visit PrairieLearn
TAO #5 in Automated Grading Software 8.7/10 Free plan Free plan✓ 0 of 5 features Visit TAO

PrairieLearn leads on 0 checks, TAO on 0, and 6 are even. Who comes out ahead on the 6 yes/no, price and count checks where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scorePrairieLearn · 9.2/10
  • Free planboth
  • Most featuresPrairieLearn · 5 of 5

PrairieLearn scores higher on our rubric for automated grading software: 9.2 against 8.7 out of 10; our editors rank them #1 and #5.

PrairieLearn is the better fit for technical courses needing code, math, and AI grading. TAO is the better fit for open, standards-based institutional assessment.

  • PrairieLearn fits best

    Technical courses needing code, math, and AI grading

  • TAO fits best

    Open, standards-based institutional assessment

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Side by side

Feature PrairieLearn 9.2/10 Visit ↗ TAO 8.7/10 Visit ↗
At a glance
Editor score 9.2 8.7
Ranking #1 in Automated Grading Software #5 in Automated Grading Software
Best for Technical courses needing code, math, and AI grading Open, standards-based institutional assessment
Pricing model Free plan + paid Free plan + paid
Starting price — €499/mo
Free plan ✓ ✓
Free trial — —
Deployment Cloud, Self-hosted, Browser extension Cloud, Self-hosted
Platforms Web Web
Support Email, Community, Docs Tickets, Community, Docs
Integrations 3 integrations 9 integrations
Built for Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features PrairieLearn 5/5 · TAO 0/5
Programming autograding ✓ (best) Not checked yet
Math autograding ✓ (best) Not checked yet
Written-work OCR ✓ (best) Not checked yet
LMS or LTI support ✓ (best) Not checked yet
Question bank ✓ (best) Not checked yet
Specs
Supported code languages Not checked yet Not checked yet
Our review
Pros
  • Randomized code-defined questions with automated grading
  • LTI 1.3 integration with Canvas and Moodle
  • AI grading for essays, proofs, diagrams, handwriting, and code
  • Supports automated, manual, partial-credit, and weighted-response scoring
  • Offers QTI, LTI 1.3, Moodle, proctoring, and specialist integrations
  • Combines self-hosted, cloud-hosted, test-center, and LMS delivery
Cons
  • Paid plans are priced per student per course
  • Enterprise pricing requires a custom agreement
  • Self-hosting requires institutional infrastructure
  • Community Edition requires self-hosted deployment
  • Paid plans are billed annually
  • Advanced service and implementation options require paid tiers
Our verdict

PrairieLearn is an online assessment and learning system for instructors and educational institutions, with a particular fit for technical courses. It supports reusable, code-defined questions with randomized variants, automated grading,…

Read the review →

TAO is an open-source computer-based testing platform for educators, assessment professionals, education ministries, higher-education institutions, professional associations, and public-sector employers. It combines WYSIWYG authoring,…

Read the review →
  1. PrairieLearnAutomated Grading Software 9.2Free plan
  2. TAOAutomated Grading Software 8.7Free plan

Strengths and trade-offs

  • PrairieLearn — where it wins

    • Randomized code-defined questions with automated grading
    • LTI 1.3 integration with Canvas and Moodle
    • AI grading for essays, proofs, diagrams, handwriting, and code

    Where it doesn't

    • Paid plans are priced per student per course
    • Enterprise pricing requires a custom agreement
    • Self-hosting requires institutional infrastructure

  • TAO — where it wins

    • Supports automated, manual, partial-credit, and weighted-response scoring
    • Offers QTI, LTI 1.3, Moodle, proctoring, and specialist integrations
    • Combines self-hosted, cloud-hosted, test-center, and LMS delivery

    Where it doesn't

    • Community Edition requires self-hosted deployment
    • Paid plans are billed annually
    • Advanced service and implementation options require paid tiers
  • PrairieLearn9.2/10 · Free plan

    A flexible grading platform for code, math, written work, and AI-assisted assessment.

    Visit PrairieLearnFull verdict →
  • TAO8.7/10 · Free plan

    A standards-based assessment platform with broad scoring, delivery, analytics, and deployment options.

    Visit TAOFull verdict →

More comparisons

All automated grading software comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update