Yes, you’ll still need to use a regulator if the rest of your project is running at 5V, but if the pins are 5V tolerant, interfacing the ESP8266 with a variety of hardware becomes very easy.

Over-voltage Protection Module to handle direct connection of voltage regulators to a 5V battery using standard 2.5 OD 3.3V devices View Over-voltage Protection Module to handle direct connection of ...

180TSMC_LDO_20 is LDO to convert IO voltage 3.0V÷5.5V to 1.8V and designed to supply integrated circuits with stable and precise voltage with load up to 40mA. The output voltage can be fine-tuned from ...