September 2026 snapshot · 72 AI answers Leader emerging

Technical Interviewing & Assessment: AI Visibility Ranking

Platforms for coding interviews, assessments, and engineering hiring. Right now, HackerRank is the brand AI assistants recommend most, with a Visibility Score of 67 and the #1 spot in 28% of answers. Head-to-head: HackerRank vs CoderPad →

These rankings are measured from what the three models know from training, not a live web search. When the models DO search the web, see which sources they cite. Methodology.

HackerRank and CoderPad trade blows while the field watches.

HackerRank leads overall at a score of 66.8 but CoderPad wins the first-pick battle at 35% of answers versus HackerRank's 28%, suggesting buyers who encounter CoderPad tend to choose it. The gap between second and third place is nearly 18 points, so CodeSignal, Codility, and Karat are competing for limited secondary mentions rather than genuine consideration. The most striking split is Claude's treatment of Codility, scoring it 54.6 while ChatGPT gives it only 17, a divergence that could matter to marketers trying to optimize for specific models.

AI-generated analysis of the September 2026 measurements.

#	Brand	Visibility Score	Trend (3 mo)	Mention rate	Avg. position	#1 pick rate	Models
1	HackerRank	67 ±3.9	flat	75%	2.1	28%	ChatGPT #1 Claude #1 Gemini #2
2	CoderPad	60 ±4.2	flat	68%	2.2	35%	ChatGPT #3 Claude #2 Gemini #1
3	CodeSignal	42 ±5.9	▼ 12	53%	3.0	3%	ChatGPT #2 Claude #6 Gemini #3
4	Codility	32 ±5.7	flat	42%	3.3	0%	ChatGPT #5 Claude #3 Gemini #6
5	Karat	29 ±3.6	▲ 9	47%	4.9	0%	ChatGPT #4 Claude #7 Gemini #5
6	LeetCode	18 ±4.2	flat	19%	2.0	10%	ChatGPT #6 Claude #5 Gemini #11
7	interviewing.io	16 ±4.2	flat	28%	5.4	1%	ChatGPT #12 Claude #4 Gemini #10
8	Byteboard	15 ±4.9	flat	21%	3.9	3%	ChatGPT #10 Claude #9 Gemini #4
9	TestGorilla	8 ±2.6	flat	15%	5.8	0%	ChatGPT #8 Claude #8 Gemini #12
10	Filtered	5 ±3.2	flat	8%	5.5	0%	ChatGPT Claude Gemini #7
11	CodeSubmit	4 ±0.3	▲ 2	6%	3.8	3%	ChatGPT Claude Gemini #8
12	Coderbyte	4 ±3.1	flat	8%	6.3	0%	ChatGPT #11 Claude #10 Gemini #13
13	NeetCode	4 ±0	▲ 2	4%	2.0	0%	ChatGPT #7 Claude Gemini
14	Codeforces	4 ±1.7	flat	6%	4.5	0%	ChatGPT #9 Claude #11 Gemini
15	Woven	4 ±3.1	flat	6%	4.5	0%	ChatGPT Claude Gemini #9

The ± under each score is the reliability band: how much the number would move if we re-ran the identical measurement. It is tight because each prompt is sampled multiple times. It is not the same as how much the ranking depends on which prompts we ask — a separate, wider figure shown on hover.

Just below the cutoff: VS Code Live Share (3.6), Miro (3.3), Excalidraw (3.2), CodeSandbox (3.2), Greenhouse (3.1). 60 brands were scored in this category; the leaderboard shows the top 15.

Visibility Score: position-weighted presence across all measured answers, 0 to 100. A score of 100 means the brand was the first recommendation in every answer. Every point in a trend line is a live monthly measurement; there is no modeled or backfilled history. Full methodology.

Openness 33/100: the share of this category's recommendation weight not held by the leader.

Compare brands in Technical Interviewing & Assessment head-to-head → · Explore the prompt tree →

Get alerted on big movements

We rerun the index every month. Drop your email and pick what to watch in Technical Interviewing & Assessment: the whole category or specific brands. Free, unsubscribe anytime.

Do the models agree?

Per-model Visibility Scores for the top 10. A long gray bar means the three assistants disagree about the brand. Hover a row for exact values.

ChatGPT Claude Gemini

Where they land in the answer

When a brand is mentioned, where does it appear? Box shows the middle 50% of positions, the thick line is the median, whiskers are the extremes. Hover a row for the detail.