italki Group Classes vs Duolingo English Test
Same Bayesian formula, same rubric — so the difference in scores reflects the difference in the courses, not the difference in how we evaluated them.
italki · Languages
italki Group Classes
Duolingo · Languages
Duolingo English Test
Per-criterion
Class topics span daily conversation to exam prep and debate — stronger than a blank-slate tutor session. But content quality varies by teacher and sessions repeat across a small topic roster. No graded curriculum arc linking one class to the next.
Group-class teachers on italki are professional teachers, not community tutors. Quality is generally consistent, but instructors must manage mixed-level groups, which compresses individual attention. Teacher profiles and reviews are browsable before booking.
At $7–12 for a one-hour group session the per-class price is hard to beat. Value flips if you compare per-minute of actual speaking time to a $10 community tutor — groups give you roughly 10–15 minutes live output per hour versus 60 on 1-on-1.
italki's platform support is adequate but not fast. Group-class refund policy requires cancellation 24 hours in advance. Live chat exists but resolution times for payment disputes are inconsistent per reviewer reports across the wider italki sample.
Speaking in front of peers under mild social pressure is genuinely useful output practice. Topic-focused classes (news, interview prep, travel) transfer directly. Ceiling is lower than 1-on-1 because correction is shared and spontaneous exchanges are shorter per learner.
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.
Scoring methodology applies identically to every course on the site — see the formula.