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Project comparison
A2A vs langchain
Compare adoption, momentum, maintenance health, and project basics before choosing which tool to evaluate deeper.
A2A
Agent2Agent (A2A) is an open protocol enabling communication and interoperability between opaque agentic applications.
Best matched with other agent tools.
25.0K
Stars
+1.2K
Weekly
74/100
Health
142.3K
Stars
+599
Weekly
86/100
Health
Quick Take
Adoption
langchain has the larger GitHub footprint with 142.3K stars.
Momentum
A2A is currently growing faster at +1.2K stars this week.
Maintenance
langchain has the stronger automated maintenance signal at 86/100. This is not a security or fit verdict.
Side-by-side evidence
Use these signals to narrow your choice, then confirm setup, license, and fit upstream.
| Signal | A2A | langchain |
|---|---|---|
| Evidence status | Basic listing· 1d ago | Recently verified· 1d ago |
| GitHub stars | 25.0K | 142.3K |
| Weekly growth | +1.2K | +599 |
| Health score | Healthy74/100 |
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