Leaving aside the debate about alternatives to CAPTCHA as a mechanism to safeguard against abuses by using the Contacts component, the answer to your question is yes. The "invisible CAPTCHA" plugin is known by it's formal name as CAPTCHA - Invisible reCAPTCHA which is disabled by default.
The other advice I would offer is
sozzled wrote: ↑Thu Apr 26, 2018 7:39 amI think that the more experienced among us are aware of the risks in running a website with a contact form that is publicly accessible. While I'm not going to debate the usefulness of contact forms—they can be useful in the right circumstances—there is a caveat: it's up to the site owner to determine if people—including 'bots—need to be properly credentialled before using (or abusing) the feature.
These unauthorised abuses of contacts are not limited to com_contact; foreign-based hackers also probe Joomla websites for the presence of com_b2jcontact and com_foxcontact (among others) for ways to exploit spam.
Where it is absolutely essential to use contact form, I restrict access to the contact form and contact information to registered users; this approach mitigates the level of spam mail significantly. Most of the time the contact feature is a waste of time but that's just my personal opinion.