Sometimes you need to find taxi numbers to call in Lisbon,and you only find articles full of text and outdated/expired phone numbers.
Check here three phone numbers of top 3 Taxi Companies in Lisbon, with hundreds/thousands of units across the city, updated January 2019:
They are all reliable and good. Take note of taxi number, in case of lost items or any report. They all have a license number and license plate.
If you wish transfer services with English speaking driver and sightseeing/visits included, check here instead: https://lisbonguide.org/lisbon-transfers/