Duolingo English Test vs italki 1-on-1 Tutoring
Same Bayesian formula, same rubric — so the difference in scores reflects the difference in the courses, not the difference in how we evaluated them.
Duolingo · Languages
Duolingo English Test
italki · Languages
italki 1-on-1 Tutoring
Per-criterion
Adaptive difficulty and integrated skill design are genuine strengths. Weakened by the absence of a formal essay (only a 5-minute writing sample), opinion-based speaking prompts, and a perceived lack of academic rigour versus IELTS and TOEFL among experienced practitioners.
No published answer keys, rubrics, or section-level guidance — the weakest methodology dimension. Some test-takers receive a score range spanning three CEFR levels rather than a single number, making preparation harder than for IELTS or TOEFL.
$65 per attempt with unlimited free score sends versus $220-plus for IELTS. 48-hour results and no test-centre booking add further convenience. The primary reason test-takers choose the DET over alternatives.
At-home, on-demand testing removes scheduling friction and supports repeated attempts. Three-tier human review provides oversight. Weakened by documented AI false-flag incidents and a 72-hour appeal window that can frustrate test-takers.
6,000-plus programs in 110-plus countries accept it, including 98 of the US News Top 100 universities and all Ivy League schools. IELTS is accepted by 12,500-plus organisations — more than double. UK/Australian visa routes and professional bodies don't yet accept at-home tests.
There is no italki curriculum — content quality is whatever the tutor brings. Professional teachers arrive with structured lesson plans and homework; community tutors lean on free-form conversation. The variance is the platform's defining quality risk.
The strongest dimension of the product. Reviewers converge that a well-chosen italki teacher is the single highest-leverage thing they did, and the marketplace gives you enough profiles, intro videos and trial lessons to find a good match.
At $8-25/hour for 1-on-1 conversation with a native speaker, italki is dramatically cheaper than in-person schools and competitive with Preply. Community tutors at $6-10/hour are described as one of the best deals in language learning.
No streaks or gamification — you book and show up, or you don't. Learners who pre-commit to a weekly slot describe it as the most durable habit they built; without a schedule, it lapses. Pre-paid credit acts as a mild commitment device.
The clearest signal in the entire sample — reviewers repeatedly describe italki as the step that finally moved them from app-bound recognition to actual conversation. Multiple commenters report passing B1/B2 exams after one to three years.
Scoring methodology applies identically to every course on the site — see the formula.