June 2026 TIOBE Index shows Python slipping below 19%, C++ moving back ahead of Java, and Rust reaching #12 as Paul Jansen revises his plateau call.

Every Python developer knows some or all of these libraries, because they’re stable, reliable, and excellent at what they do.

Python’s lead narrows again, C holds the runner-up spot, C++ returns to third, and SQL climbs back above R in June’s top 10 ...