SWARM is designed to provide IoT services from Satellites. Each satellite weights just around 400g which belongs to the category of Nano satellites.

FCC

[1] Swarm gets green light from FCC for its 150-satellite constellation (Oct 2019)

[2] Swarm Technologies licensed for NVNG MSS system

YouTube - Technical

• SWARM: A New Paradigm for Communication Satellites (Mar 2021)

Reference

• SWARM Homepage