Before this market, all energy prices where established by a electricity regulator entity (ERSE). With the liberalisation of the market, consumers hire whichever provider they rather, with a tariff and conditions agreed with both parties.
Luzigás is a liberalised provider and its prices can be consulted here.
This company is the owner of the meter and the network that connects your home. IT should assure the correct functioning of its energy to the end users.
REN - Redes Energéticas Nacionais has a contract with the Portuguese State, having the obligation to assure the uninterrupted supply of both electricity and gas in Portugal (mainland), meeting cost, quality and safety standards established by competent entities.
For electricity distribution the responsible company is EDP Distribuição.
As for gas distribution is made by different companies differing on each region.
Producing companies are responsible to build the electricity within its production areas and transfer them the electricity network.
Thermal, Nuclear, Gas or Hydro Power Plants and production areas that use alternative / clean energies (eolic, solar, etc).
Its the entity that regulares Electricity and Gas sectors. ERSE, through its activity regulates and inspects both sectors, assuring the consumers rights, interests and economical balance between companies.