The verdict
If you have no way to follow up with the people who fill in your forms, I'd pick Brevo first. A list with a simple automation behind it does more than a prettier form.
If you already send email and your demo request or application form is where people drop out, I'd pick Typeform and spend on it where conversion pays back.
The two connect through integrations or Zapier, so many teams end up with both. Do not buy Typeform for quick internal forms. A free form tool does that job, and the one-question format is slower for long, simple lists of fields.