PlanetWatch is a defunct French blockchain-based air quality monitoring network that was co-founded as a CERN spin-off, built on Algorand and IoT sensors to create an immutable air quality ledger rewarding participants with the $PLANETS token. PlanetWatch's Twitter Score is 8.4 out of 1000 as of August 2026, ranking #106,747 among 483,944 tracked accounts.
PlanetWatch was founded by Claudio Parrinello and drew on CERN's C2MON data-acquisition framework, having previously been affiliated with CERN during its early development. The project launched in 2020 and built a decentralized network of cost-effective sensors, using Algorand to maintain an immutable record of hyperlocal air quality data while distributing $PLANETS tokens to sensor owners as incentives. Borderless Capital closed a $10M PLANETS.Fund in 2021 to invest in the PlanetWatch ecosystem, and Algorand Ventures had previously backed the project.
PlanetWatch's trajectory shifted in March 2024, when Solana-based DePIN project Ambient acquired its network, with plans to migrate from Algorand to Solana. The company subsequently entered judicial reorganization in January 2025, which converted to judicial liquidation in March 2025 and was closed for insufficient assets in February 2026, marking the end of operations. PlanetWatch has published 2,338 posts on the platform and has been mentioned by 41 accounts a total of 115 times.
Who follows PlanetWatch on X?
The accounts that follow PlanetWatch include 47 founders, 6 angel investors, 18 influencers and 4 VCs, among them Mario Nawfal, Knower, Anthony Scaramucci, Joshua Lim, 0xMarioNawfal and Tintin.