Ceremonies vs Retrium

Ceremonies is an open-source toolkit for agile estimation and retrospective sessions, offered as a web service or for self-hosting. Estimation rooms use a Modified Fibonacci deck with a coffee-cup choice; votes remain hidden until reveal, results can be sent to Jira, and sessions synchronize through WebSockets without page refreshes. Earlier estimation rounds can be copied into a Slack summary. Retrospectives use Happy, Sad, and Confused cards, anonymous writing, enforced phases, and action items that continue into the next retrospective. Participants join through a link or room code without creating accounts. The source is MIT-licensed. The hosted service is operated by Shadman Rahman. Its Free plan costs nothing and allows one team, five members, and ten sessions per month. The privacy policy says user data is not sold, used for ads, or used to train AI models.

Retrium has no write-up on Specifiction yet; its figures are above.