zoom plan

Welcome to the Zoom Community, @anaa.

There is no 6-month plan.  Zoom offers a monthly plan, and an annual plan.  See the Zoom Pricing page here:

https://zoom.us/pricing

Click the Billed Annually or Billed Monthly buttons to see the rates.  The Pro plan for up to 1-9 users $14.99/month per user, or $149.90/year per user which is a savings of 17%.  The Business plan is for 10 or more users and is slightly more expensive, since additional capability and service levels are available to user.