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Best load testing tool for APIs and microservices

3 models · updated 2026-06-29

The verdict

Gatling leads — All 3 models rank Gatling the top startup.

Combined ranking

  1. 1
    Gatling—11 pts
    GPT #2Claude #2Gemini #3· High-performance load generation with polished enterprise orchestration.
  2. 2
    Locust—8 pts
    GPT #3Claude #3Gemini #4· Python-native scripting makes complex microservice flows easy.
  3. 3
    Artillery—3 pts
    GPT #5Claude #5Gemini #5· Lightweight Node.js tool with good cloud-native workflow.

Not ranked (incumbents): Grafana k6, Apache JMeter, k6

By model

ChatGPT

  1. 1.Grafana k6
  2. 2.Gatling
  3. 3.Locust
  4. 4.Apache JMeter
  5. 5.Artillery

Claude

  1. 1.k6
  2. 2.Gatling
  3. 3.Locust
  4. 4.Apache JMeter
  5. 5.Artillery

Gemini

  1. 1.Grafana k6
  2. 2.Apache JMeter
  3. 3.Gatling
  4. 4.Locust
  5. 5.Artillery

Tracked by ModelsAgree · rank 1 = 5 pts … rank 5 = 1 pt · re-polled continuously