Agent Lightning vs DeepSeek Harness

Side-by-side comparison of two AI agent tools

A
Agent Lightningopen-source

The absolute trainer to light up AI agents.

D
DeepSeek Harnessopen-source

DeepSeek Harness: Everything is a Plugin.

Metrics

Agent LightningDeepSeek Harness
Stars18.5k241.0k
Star velocity /mo1.5k20.1k
Commits (90d)5619.8k
Releases (6m)310
Overall score0.68731546499282750.9567284473507968

FAQ

Which is more popular, Agent Lightning or DeepSeek Harness?
DeepSeek Harness has more GitHub stars (241,031 vs 18,539).
Which is more actively developed, Agent Lightning or DeepSeek Harness?
DeepSeek Harness had more commits in the last 90 days (19,798 vs 56).
Should I use Agent Lightning or DeepSeek Harness?
Compare their capabilities, limitations and "best for" notes above. Both are open source, so trying each on a small task is the fastest way to decide.
Agent Lightning vs DeepSeek Harness (2026): GitHub Stats, Features & Which to Choose