Both CometML and Tensorboard help track metrics/weights during training in a similar way. CometML also tracks your hyperparams, code, dependencies. We also allow you to compare models, collaborate by sharing projects and experiments and much more. TB is an amazing tool but it doesn't help with reproducibility.

If you're already using Tensorboard just throw in our one liner: comet_ml.experiment(api_key="your-key") and you'll get everything TB gives you + our added value.