Welcome back!
Login to the platform and start to work on the challenge.
Login as Replyer
or

Facebook login is temporarily unavailable.
If you signed up with your Facebook credentials, click “Forgot your password?” and reset your password.
or
Email *
Something’s not right Please enter something
Password *
Please enter something
Keep me logged in Forgot your password?

New to Reply Challenges? Sign up

Reply Challenges: prove your talent and have fun

Reply Challenges are a series of online competitions created by Replyers and open to anyone who loves technology in the fields of Coding, Finance, Security and Creativity!

Discover our ongoing challenges

RELIEVE THE

AI FILM FESTIVAL

Welcome to the Reply AI Film Festival, the 1st competition connecting AI-talents with the global cinematic industry.

RELIVE THE

AI MUSIC CONTEST

Welcome to the Reply AI Music Contest, the 1st competition connecting AI talents with the live performance industry.

RELIEVE THE

AI FILM FESTIVAL

Welcome to the Reply AI Film Festival, the 1st competition connecting AI-talents with the global cinematic industry.

RELIVE THE

AI MUSIC CONTEST

Welcome to the Reply AI Music Contest, the 1st competition connecting AI talents with the live performance industry.

12 March, 2026

AI AGENT CHALLENGE

The AI Agent Challenge is a 6-hour team-based competition for passionate about LLMs and AI. Design a multi-agent system capable of observing, adapting, and acting autonomously to solve a fraud detection scenario.

RELIEVE THE

AI FILM FESTIVAL

Welcome to the Reply AI Film Festival, the 1st competition connecting AI-talents with the global cinematic industry.

RELIVE THE

AI MUSIC CONTEST

Welcome to the Reply AI Music Contest, the 1st competition connecting AI talents with the live performance industry.

Past challenges

LIVE - Ask Us Anything

RELIVE THE

HACK THE CODE CHALLENGE

An online team-based coding and security competition open to coders aged 16+. Use your coding skills to solve tricky algorithms and challenge your skills in multiple cyber security fields. Join us on March 12th!

RELIVE THE

HACK THE CODE CHALLENGE TEEN

An online team-based coding and security competition addressed to high school students. Use your coding skills to solve 5 tricky algorithm-based problems in 6 hours. Join us on March 12th!

RELIVE THE

CODE CHALLENGE

An online team-based coding competition open to coders aged 16+. Use your coding skills to solve some tricky algorithm-based problems.

RELIVE THE

CODE CHALLENGE TEEN

An online team-based coding competition addressed to high school students. Use your coding skills to solve 5 tricky algorithm-based problems in 4 hours.

RELIVE THE

INVESTMENT CHALLENGE

An online trading competition to learn about last financial trends. Invest €1,000,000 pretend money in the real-time market and maximise your profits.

RELIVE THE

CREATIVE CHALLENGE

A 48-hours competition open to creative teams from all over the world. The aim: to answer a creative brief set by various international brands.

RELIVE THE

CYBER SECURITY CHALLENGE

A team-based CTF online competition that challenges your skills in multiple cyber security fields. Can you find 25 flags in 24 hours?

previously

Gathering emerging talents from all over the world since 2017.

Discover careers in Reply

Explore all the job offers available in your country