There are fantastic companies in Maine that make composting very easy and affordable. Those listed below offer a subscription-based service with regular pick up of your organic materials. They provide the bins, and some can even supply you with the finished compost!
Garbage to Garden: Serving Greater Portland and beyond
We Compost It!: Serving Great Portland and beyond
Agri-Cycle Energy: Serving Maine, New Hampshire, and Massachusetts
Mr. Fox Composting: Serving southern Maine and New Hampshire
Project Earth: Serving the Lincoln County area