Arduino (https://github.com/blynkkk/blynk-library)
Arduino MKR WiFi 1010
Arduino MKR GSM 1400
Arduino MKR NB 1500
Arduino Uno, Duemilanove
Arduino Nano, Mini, Pro Mini, Pro Micro, Due, Mega
Arduino 101 (Intel Curie, with BLE)
Arduino MKR1000
Arduino Zero
Arduino Yún (onboard WiFi and Ethernet, via Bridge)
Arduino.org UNO WiFi
Arduino MKR VIDOR 4000 (use the example for MKR WiFi 1010)
Arduino UNO WiFi Rev.2 (use the example for MKR WiFi 1010)
Arduino-like
Blynk Board
ESP8266 (Generic, NodeMCU, Witty Cloud, Huzzah, WeMos D1, Seeed Wio Link, etc.)
ESP32 (WiFi, BLE)
Nordic nRF51/nRF52 - based boards
Teensy 3.2/3.1
Blue Pill (STM32F103C)
Realtek RTL8710 / Ameba via RTLduino
BBC micro:bit
LightBlue Bean , soon
DFRobot Bluno
RedBear Duo (WiFi, BLE)
RedBearLab Blend Micro
RedBearLab BLE Nano (v1 and v2)
Seeed Tiny BLE
Simblee BLE
RFduino BLE
The AirBoard (BLE-Link, RN-XV)
Feather M0 WiFi
Feather 32u4 BLE
Intel Edison
Intel Galileo
Fishino Guppy, Uno, Mega
TinyCircuits TinyDuino (CC3000)
Microduino/mCookie Core, Core+, CoreUSB
Wicked WildFire V2, V3, V4
Digistump Oak
chipKIT Uno32
Alorium XLR8 (FPGA)
LinkIt ONE (WiFi only)
Energia
Texas Instruments
CC3220SF-LaunchXL
CC3200-LaunchXL
Tiva C Connected LaunchPad
Stellaris LM4F120 LaunchPad
MSP430F5529 + CC3100
LaunchPad MSP432
RedBearLab (CC3200, WiFi Mini)
Particle https://github.com/vshymanskyy/blynk-library-spark)
Core
Photon
Electron
RPi
SparkFun RedBoard
RedBear Duo (WiFi & BLE)
ARM mbed (https://developer.mbed.org/users/vshymanskyy/code/Blynk/)
Seeed Tiny BLE
RedBearLab BLE Nano
BBC micro:bit
STM32 Nucleo + Wiznet 5100 , soon
JavaScript (Node.js, Espruino, Browsers) (https://www.npmjs.com/package/blynk-library)
Regular PC with Linux / Windows / OS X
Raspberry Pi (Banana Pi, Orange Pi, …)
BeagleBone Black
Onion Omega
Onion Omega 2
Intel Galileo
Intel Edison
Intel Joule
LeMaker Guitar
LeMaker Banana Pro
Samsung ARTIK 5
PandaBoard, CubieBoard, pcDuino, Tessel 2
VoCore, VoCore2 (OpenWRT + Espruino package)
Espruino Pico
…
Python (https://github.com/vshymanskyy/blynk-library-python)
MicroPython
Python 2
Python 3
Lua (https://github.com/blezek/blynk-esp)
NodeMCU
USB (Serial), connected to your laptop or desktop
Ethernet
Arduino MKR ETH
Arduino Ethernet Shield (W5100)
Arduino Ethernet Shield 2 (W5500)
SeeedStudio Ethernet Shield V2.0 (W5200)
ENC28J60-based modules
WiFi
ESP8266 as WiFi modem (running original firmware)
Arduino WiFi 101 Shield
Arduino WiFi Shield
WIZnet WizFi310
Adafruit CC3000 WiFi Breakout / Shield
RN-XV WiFly
Bluetooth Smart (BLE 4.0)
HM-10, HC-08
DFRobot BLE-Link module
Microduino/mCookie BLE
RedBearLab BLE Mini
nRF8001-based boards (Adafruit Bluefruit LE, etc.)
Bluetooth 2.0 Serial Port Profile (SPP)
HC-05, HC-06, …
Cellular (GSM/3G/LTE)
SIMCom SIM800 series (SIM800A, SIM800C, SIM800L, SIM800H, SIM808, SIM868)
SIMCom SIM900 series (SIM900A, SIM900D, SIM908, SIM968)
A6/A7
M590
BG96
GPRSbee
Microduino GSM
Adafruit FONA (Mini Cellular GSM Breakout)
Adafruit FONA 800/808 Shield
These boards are not supported and do not work out of the box: - Arduino Tian
Here is a list of known library issues