The verdict
If you need to send a newsletter, run a drip sequence or manage unsubscribes, pick Mailchimp. A form tool cannot do that job.
If you have a demo request, an application or an onboarding questionnaire where people drop out, pick Typeform. The format is built to get more people to the end, and the answers can feed your CRM or email tool.
For a small B2B team starting from nothing, I would set up email first, because you need somewhere to send people once they sign up. Add Typeform when a specific form is losing you leads. They are partners in a funnel, so I do not name a winner.