What is the replacement for Jenkins CI?

Question

Java

Goodnight!
What is an adequate replacement for Jenkins CI? Right now it is very limited in resources, and Jenkins is short of 512mb RAM and 1 CPU.
I believe the problem is in the Java VM. This begs the question, is there a more lightweight replacement for Jenkins?
Main criteria:
* Ability to run the slave on a Windows machine (required for C # build)
* Open Source (Only free licenses)
* Ability to integrate with Git, Amazon S3, Slack
* Convenient configuration. I really like the look of Travis configs
* Lightweight. 512mb RAM, 1 CPU

Answer 1

Write your bike instead of CI
Jenkins, it's easier just nowhere else, and with your requirements, so that it's also free and small and everything works - just write your own scripts.

Answer 2

check
out GitLab https://about.gitlab.com/
Buddy https://buddy.works/