1
CS50
cs50.harvard.edu/pythonAlso covers ios, python, and sql · same kind of website
CS50’s Python course introduces programming with Python, covering code reading and writing, testing, debugging, and core concepts.
Alternatives
The Best CS50 Alternatives in 2026
24 alternatives3 free · 4 open source
Looking for something like CS50? Here are 24 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 3 are free or have a free plan and 4 are open source.
CS50x is Harvard’s introduction to computer science and programming for students with or without prior experience.
Top picks at a glance
First suggestionCS50CS50’s Python course introduces programming with Python…Free or freemium optionRegexLearnRegexLearn teaches regular expressions through interactive…Another optionTutorialKartTutorialKart collects online courses, learning materials…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | CS50 | — | Not stated | Android, iOS, Web |
| 2 | TutorialKart | — | Not stated | Android, Linux, Web |
| 3 | Sourcecodester | — | Not stated | Web |
| 4 | Programiz | — | Not stated | Web |
| 5 | Mage | — | Not stated | Web |
| 6 | RegexLearn | Free | Yes | Web |
| 7 | Data Engineering Practice Problems | — | Not stated | — |
| 8 | Codelabs | — | Not stated | Android, iOS, Web |
| 9 | Hacksplaining | Freemium | Not stated | Web |
| 10 | Codepip | — | Not stated | Web |
All CS50 alternatives
2
TutorialKart
tutorialkart.comAlso covers python and sql · same kind of website
TutorialKart collects online courses, learning materials, and interview questions across programming, databases, SAP, and other subjects.
3
Sourcecodester
sourcecodester.comAlso covers python and sql · same kind of website
Sourcecodester publishes free source code projects and tutorials in programming languages including Python, PHP, and Java.
4
Programiz
programiz.comAlso covers python and sql · same kind of website
Programiz offers free online compilers and code editors alongside programming tutorials for languages including Python, JavaScript, SQL, and C++.
5
Mage
mage.aiAlso covers python and sql · same kind of website
Mage automates production data pipelines with SQL and Python workflows, data-quality checks, failure recovery, and performance tuning.
6
Also covers python and sql · open source
RegexLearn teaches regular expressions through interactive lessons and practice at different levels.
7
Data Engineering Practice Problems
github.com/danielbeach/data-engineering-practiceAlso covers python and sql
Data Engineering Practice Problems provides exercises for practicing data engineering skills.
8
Also covers ios and sql · same kind of website
Google Codelabs provides guided, hands-on tutorials for building applications and adding features across developer technologies.
9
Also covers sql · same kind of website
Hacksplaining teaches secure coding through interactive browser lessons covering OWASP Top 10 and GenAI threats.
10
Codepip
codepip.com/gamesAlso covers sql · same kind of website
Codepip offers coding games for practicing HTML, CSS, JavaScript, and SQL, including Flexbox Froggy and Grid Garden.
11
SQL Easy
sql-easy.comAlso covers sql · same kind of website
SQL Easy teaches SQL through 31 interactive browser exercises using SQLite, with hints and practice in common query clauses.
12
Learn SQL
sqlbolt.comAlso covers sql · same kind of website
SQLBolt offers interactive SQL lessons and exercises for learning database queries.
13
SQL Noir
sqlnoir.comAlso covers sql · same kind of website
SQL Noir teaches SQL through an interactive detective game where players query a database to investigate cases.
14
PortSwigger Academy
portswigger.net/web-securityAlso covers sql · same kind of website
PortSwigger Web Security Academy offers free online training and interactive labs for web application security.
15
SQL PD
sqlpd.comAlso covers sql · same kind of website
SQL Police Department teaches SQL through online crime-solving missions that require building queries and reviewing results.
16
SQLable -
sqlable.comAlso covers sql · same kind of website
SQLable collects SQL and database learning resources, including information about SQL features and tools.
17
Also covers sql · same kind of website
Select Star SQL is an interactive book that teaches SQL by running queries against a real-world dataset.
18
CodeAnalogies
codeanalogies.comAlso covers sql · same kind of website
CodeAnalogies teaches CSS and JavaScript concepts through visual guides, analogies, and imagery.
19
Lost at SQL
lost-at-sql.therobinlord.comAlso covers sql · same kind of website
Lost at SQL teaches SQL concepts through a text-based game designed for data scientists and marketers.
20
SQL Practice
sql-practice.onlineAlso covers sql · same kind of website
SQL Practice provides a browser-based SQL editor with SQLite and PostgreSQL execution, plus compatibility labs and guided Oracle exercises.
21
Also covers sql · open source
awesome-system-design-resources provides free materials for learning system design and interview preparation.
22
Also covers sql · open source
backend-challenges lists open-source coding challenges based on real job requirements.
23
Data Engineer Handbook
github.com/DataExpert-io/data-engineer-handbookAlso covers sql
Data Engineer Handbook collects links and resources for data engineering.
24
Also covers python · open source
Computer Science Lecture Links collects video lecture links for placement preparation, including C and data structures.
No alternatives match this filter.
Alternatives to similar tools
Codelabs24 alternativesHacksplaining24 alternativesawesome-system-design-resources24 alternativesData Engineering Practice Problems24 alternativesSQL Easy24 alternativesPortSwigger Academy24 alternatives
What is the best alternative to CS50?
Based on features, tags and platforms, the closest alternatives to CS50 are CS50, TutorialKart, and Sourcecodester.
Is there a free alternative to CS50?
Yes. RegexLearn, Hacksplaining, and StarSQL are free or offer a free plan.
Are there open-source alternatives to CS50?
Yes: RegexLearn, awesome-system-design-resources, backend-challenges, and Computer Science Lecture Links.
Alternatives are suggested from the purpose and features described in our listings. Different pages for the same product appear once. Read each description to check whether it fits your task. How we choose alternatives · Suggest an alternative