Dev tools · alternatives · 2026

24 alternatives to CO2 Observer

Analyze sites for CO2 usage & build a greener web!

Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes. CO2 Observer launched in 2023; newer entries below may have overtaken it.

1
Website Carbon Calculator▲105
Find out the how much CO2 your website emits
2019 · websitecarbon.com · its alternatives →
2
Carbon Neutral Website▲107
Calculate and optimize web page carbon footprint
2023 · carbonneutralwebsite.org · its alternatives →
3
I wanted to measure CO2 in my office, so I build a C++ WebServer/App▲146
A simple webserver / CO2 Monitor. Contribute to Maddimax/MadCO2 development by creating an account on GitHub.
2019 · github.com · its alternatives →
4
Website Carbon Badge▲90
Display your website carbon emissions and raise awareness.
2020 · its alternatives →
5
Low cost CO₂ monitoring (your office) with Prometheus and Go▲127
CO₂ & Temperature monitor. Contribute to larsp/co2monitor development by creating an account on GitHub.
2018 · github.com · its alternatives →
6
CarbonSutra▲70
API for estimating carbon emissions of organizations
2023 · carbonsutra.com · its alternatives →
7
Image Carbon▲87
Carbon calculator for website images
2023 · imagecarbon.com · its alternatives →
8
Sitechecker▲303
Toolkit to measure and track website SEO performance
2020 · sitechecker.pro · its alternatives →
9
Carbonless▲8
Measure and reduce your website carbon
Aug 2026 · carbonless.cc · its alternatives →
10
YAYZY▲135
Track the carbon footprint of each purchase in real-time
2020 · yayzy.com · its alternatives →
11
GreenFrame▲85
Measure and reduce your website's CO2 emissions!
2022 · greenframe.io · its alternatives →
12MC
Measure CO2 emissions of your APIs▲20
Have you ever wondered about the carbon footprint of your API? This week, the 27th climate summit takes place in Egypt. This inspired us to draw attention to the emissions produced by our online behaviour. We introduced some CO2-related features to our API testing tool: - Calculate carbon emissions of an API call - Set up a check to validate that your API endpoint doesn't cross the limit when it comes to emissions - Test all your API endpoints and get an approximate calculation of your API emissions in total We hope that by using these features, you will become more aware of the carbon…
2022 · docs.stepci.com · its alternatives →
13
Observer▲101
Ultimate tool for superior website health and performance
2024 · siteobserver.co · its alternatives →
14
Carbonly 🌿▲69
An Online Carbon Footprint Tracker 🌿💨
2020 · its alternatives →
15CD
Carbon Doomsday – Graph and API of Earth's Carbon Dioxide▲118
2018 · carbondoomsday.com · its alternatives →
16
Carbon Interface 1.0▲115
Measure carbon emissions with an API
2020 · carboninterface.com · its alternatives →
17
Travel CO₂▲73
Calculate, visualize and integrate CO₂ emissions from travel
2022 · travelco2.com · its alternatives →
18
Bend▲130
1 click carbon accounting for startups
2022 · its alternatives →
19
Neutral (Beta)▲169
Live carbon neutral and create a better future.
2020 · its alternatives →
20
Website Carbon Footprint Calculator▲8
Check your website’s carbon impact with real-time insights
2025 · thecarbonfootprint.ai · its alternatives →
21
EcoPing▲10
Tools to reduce your company's website carbon emissions
2024 · its alternatives →
22
Greenr▲125
Track, reduce, compete and offset your carbon footprint
2021 · its alternatives →
23
Climate Change Tracker▲118
The easiest way to track climate change metrics.
2022 · climatechangetracker.org · its alternatives →
24
onEco +Analytics▲90
Capture all visits: GDPR-safe, Carbon conscious analytics
2024 · prelumen.com · its alternatives →

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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →