The Library

Circa's Library

Last updated October 13, 2026

The Library#

Circa’s Library gives practitioners access to more than 26 million datapoints.

The Library is free to search, and datapoints are licensed on a usage basis. All metadata is free to view before licensing.

Data Sources#

Circa’s Library contains data published from leading industry sources and partners

Data Types#

The library contains four types of data:

  • Processes
  • Intermediate Materials
  • Elementary Materials
  • Graphs

Processes#

Process Boundary Types#

  • Aggregated: Unit Process that includes the cumulative LCI of the upstream Processes.
  • Disaggregated: Unit Process that includes only the local LCI, no cumulative exchanges from upstream Processes are included.
  • Partially Aggregated: The named activity, with each input automatically linked to an Aggregated upstream supplier Process.

Characterization Methods#

Circa offers over 6 characterization methods, if there is a characterization method you would like to see, let our team know at contact@circa.ai

  • EF v3.1 no LT
  • IPCC 2021 no LT
  • ReCiPe 2016 v1.03, midpoint (H) no LT
  • CML.v 4.8 2016 no LT
  • TRACI v2.1
  • EN15804

Need more help?

Still stuck? Write to contact@circa.ai and the team will help.