Low response rates are normal, especially when you are reaching out cold.

Do not treat silence as a judgment on your profile. Consultants are busy and many messages simply arrive at bad times.

Send one concise follow-up after a reasonable gap, then move on and contact other relevant people rather than chasing one person repeatedly.

Improve the targeting and specificity of the message before increasing volume. For more detail, see the consulting cold email templates.

For what it's worth, A short follow-up is fine. Repeated follow-ups started to feel awkward for me. I learned that pretty quickly.

tbh Alumni were much easier to approach than completely random consultants.