1
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.
Alternatives
The Best CS50 Alternatives in 2026
24 alternatives4 free · 1 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, 4 are free or have a free plan and 1 are open source.
CS50’s Python course introduces programming with Python, covering code reading and writing, testing, debugging, and core concepts.
Top picks at a glance
First suggestionSourcecodesterSourcecodester publishes free source code projects and…Free or freemium optionCS50CS50x is Harvard’s introduction to computer science and…Open source optionRegexLearnRegexLearn teaches regular expressions through interactive…Another optionProgramizProgramiz offers free online compilers and code editors…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | Sourcecodester | — | Not stated | Web |
| 2 | Programiz | — | Not stated | Web |
| 3 | CS50 | Free | Not stated | Android, iOS, Web |
| 4 | Mage | — | Not stated | Web |
| 5 | TutorialKart | — | Not stated | Android, Linux, Web |
| 6 | RegexLearn | Free | Yes | Web |
| 7 | Data Engineering Practice Problems | — | Not stated | — |
| 8 | Hacksplaining | Freemium | Not stated | Web |
| 9 | CodeAnalogies | — | Not stated | Web |
| 10 | Lost at SQL | — | Not stated | Web |
All CS50 alternatives
2
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++.
3
Also covers ios, python, and sql · same kind of website · free
CS50x is Harvard’s introduction to computer science and programming for students with or without prior experience.
4
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.
5
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.
6
Also covers python and sql · open source · free
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 sql · same kind of website · free plan
Hacksplaining teaches secure coding through interactive browser lessons covering OWASP Top 10 and GenAI threats.
9
CodeAnalogies
codeanalogies.comAlso covers sql · same kind of website
CodeAnalogies teaches CSS and JavaScript concepts through visual guides, analogies, and imagery.
10
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.
11
Automate The Boring Stuff
automatetheboringstuff.comAlso covers python · same kind of website
Read Automate the Boring Stuff with Python, a free-to-read book by Al Sweigart about practical Python programming.
12
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.
13
A Byte of Python
python.swaroopch.comAlso covers python · same kind of website
This free beginner guide introduces programming with the Python 3 language.
14
zetcode
zetcode.comAlso covers python · same kind of website
ZetCode offers accessible programming tutorials covering C#, Go, Python, Java, and other languages.
15
Cs50
cs50.devAlso covers python
Visual Studio Code for CS50 provides a coding environment adapted for students and teachers.
16
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.
17
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.
18
Learn SQL
sqlbolt.comAlso covers sql · same kind of website
SQLBolt offers interactive SQL lessons and exercises for learning database queries.
19
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.
20
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.
21
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.
22
SQLable -
sqlable.comAlso covers sql · same kind of website
SQLable collects SQL and database learning resources, including information about SQL features and tools.
23
Also covers sql · same kind of website · free
Select Star SQL is an interactive book that teaches SQL by running queries against a real-world dataset.
24
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.
No alternatives match this filter.
Alternatives to similar tools
Codelabs24 alternativesHacksplaining24 alternativesData Engineering Practice Problems24 alternativesCS5024 alternativesCs5024 alternativesSQL Easy24 alternatives
What is the best alternative to CS50?
Based on features, tags and platforms, the closest alternatives to CS50 are Sourcecodester, Programiz, and CS50.
Is there a free alternative to CS50?
Yes. CS50, RegexLearn, and Hacksplaining are free or offer a free plan.
Are there open-source alternatives to CS50?
Yes: RegexLearn.
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