CourseVerdict

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

3.6/ 5 · 28 opinions
14 positive9 neutral5 negative/ 28 total

Duolingo · Languages

Duolingo English Test

3.7/ 5 · 48 opinions
23 positive13 neutral12 negative/ 48 total

Per-criterion

Content quality3.5 / 5

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.

Instructor / method3.8 / 5

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.

Value for money4.0 / 5

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.

Support3.2 / 5

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.

Real-world fluency3.7 / 5

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.

Content quality3.4 / 5

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.

Instructor / method2.8 / 5

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.

Value for money4.7 / 5

$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.

Retention & motivation3.5 / 5

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.

Real-world fluency4.2 / 5

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.