Harvard CS50 vs LeetCode:Which is more popular?
In September 2026, LeetCode had more branded searches than Harvard CS50 among online coding platforms worldwide. LeetCode had about 3.4 million branded searches, while Harvard CS50 had 107,000. LeetCode made up 77.2% of all online coding platform searches we track, and Harvard CS50 accounted for 2.5%. When we asked ChatGPT and Google AI Overviews about online coding platforms, Harvard CS50 appeared in three of the five answers and LeetCode in two. Harvard CS50 was mentioned before LeetCode in three out of four answers that named either.
Who do people search for more?
LeetCode, about 31 searches for every 1 for Harvard CS50
Who does AI mention more?
Harvard CS50, mentioned in 3 of 5 answers, LeetCode in 2
Who does AI recommend more?
Harvard CS50, named ahead of LeetCode in 3 of 4 answers
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Top online coding platforms in ChatGPT and Google AI Overviews
In three ChatGPT questions and two Google AI Overviews, Harvard CS50 was mentioned in three out of five: in two of the three ChatGPT answers and in one of the two Google AI Overviews. LeetCode was mentioned in two out of five: in two of the three ChatGPT answers, but not in either of the two Google AI Overviews. Harvard CS50 was listed before LeetCode in three out of four answers that named either.
Most recommended by AI
Brands get a higher ranking if they are mentioned earlier in the answers.
freeCodeCamp1st
Codecademy2nd- Harvard CS503rd
- LeetCode4th
The Odin Project5th
Scrimba6th
Exercism7th
DataCamp–
Mentioned by AI
Each dot is one answer, filled in when that answer mentions the brand.
- freeCodeCamp5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Codecademy5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
- Scrimba4 of 5Named in 3 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- Harvard CS503 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
- LeetCode2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- The Odin Project2 of 5Named in 2 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- Exercism1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers
- DataCamp0 of 5Named in 0 of 3 ChatGPT answersNamed in 0 of 2 Google answers
See every answer about online coding platforms
5 answers
Asked ChatGPT
“Which online coding platform should I use?”
Asked ChatGPT
“What are the best online coding platforms?”
Asked ChatGPT
“What's the best online coding platform for learning to code?”
Searched Google, AI Overview
“online coding platforms”
Searched Google, AI Overview
“coding lessons online”
Not named in any answer:
Brands are shown in the order each answer named them. The survey took place in the United States on October 21, 2026.
Is Harvard CS50 or LeetCode more popular in search?
This chart shows how often people search Google for Harvard CS50 and LeetCode by name. Each line represents a brand's share of searches for all eight online coding platforms we track, month by month, from English-language searches worldwide.
Share of searches by month for LeetCode, Harvard CS50. The figures are in the table below the chart.
View monthly share of searches table
| Month | LeetCode | freeCodeCamp | DataCamp | Codecademy | Harvard CS50 | Exercism | The Odin Project | Scrimba |
|---|---|---|---|---|---|---|---|---|
| Oct 2025 | 63.7% | 8.6% | 7% | 12.8% | 2.7% | 2.1% | 1.7% | 1.4% |
| Nov 2025 | 63.5% | 8.5% | 8.5% | 12.8% | 2.3% | 1.7% | 1.4% | 1.1% |
| Dec 2025 | 67.2% | 9% | 6% | 11% | 2.5% | 1.5% | 1.5% | 1.2% |
| Jan 2026 | 68.1% | 9.2% | 5% | 11.2% | 2.5% | 1.5% | 1.5% | 1% |
| Feb 2026 | 66% | 8.9% | 5.9% | 13.3% | 2% | 1.8% | 1.2% | 0.98% |
| Mar 2026 | 65% | 10.7% | 4.8% | 13% | 2% | 2.1% | 1.4% | 0.96% |
| Apr 2026 | 67.6% | 11.1% | 6.1% | 7.4% | 2.8% | 2.2% | 1.5% | 1.2% |
| May 2026 | 68.3% | 11.2% | 6.1% | 6.1% | 3.3% | 1.8% | 1.8% | 1.2% |
| Jun 2026 | 72.9% | 9.8% | 5.4% | 4.4% | 2.9% | 2% | 1.6% | 1.1% |
| Jul 2026 | 77.4% | 8.5% | 3.8% | 3.8% | 2.5% | 1.7% | 1.4% | 0.94% |
| Aug 2026 | 76.6% | 8.4% | 4.6% | 3.8% | 2.6% | 1.7% | 1.4% | 0.93% |
| Sep 2026 | 77.2% | 8.5% | 4.6% | 3.8% | 2.5% | 1.4% | 1.1% | 0.93% |
How has the Harvard CS50 and LeetCode comparison changed over the last 12 months?
3 findings
- LeetCode was ahead of Harvard CS50 in every measured month of the 12 months ending September 2026.
- Across the 12 months ending September 2026, Harvard CS50’s share of searches among online coding platforms worldwide moved from 2.7% to 2.5%, and its estimated monthly branded searches moved from 96.2K to 107K.
- Across the 12 months ending September 2026, LeetCode’s share of searches among online coding platforms worldwide moved from 63.7% to 77.2%, and its estimated monthly branded searches moved from 2.2M to 3.4M.
How did search popularity change for online coding platforms worldwide in September 2026?
2 changes
In September 2026, LeetCode gained share of searches among online coding platforms worldwide, from 76.6% to 77.2%.
Estimated monthly branded searches for Harvard CS50 worldwide rose 11.3% over 12 measured months, from 96.2K to 107K in September 2026.
How are branded searches counted?
3 search terms
Brandwave collects information about searches that people make online using Harvard CS50’s and LeetCode’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.
Harvard CS50
2 branded search terms
- cs50
- harvard cs50
LeetCode
1 branded search term
- leetcode
Other head-to-heads among online coding platforms
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