Blossom specifies HTTP endpoints for storing blobs on media servers using Nostr public and private keys for identity.
Open source
24 alternativescontact cloud
Contact Cloud visualizes a Nostr contact-list graph, with the project exploring proximity between public keys.
About contact cloud
Contact Cloud is an open-source experiment that visualizes the Nostr contact-list graph. It plots public keys as points in a 2D layout, colors them using Louvain community detection, and arranges them with a force-directed method called Force2Vec. The project explores whether the closeness of points in that layout could eventually be used to recommend Nostr pubkeys to follow; the README describes this as an aim rather than a shipped feature.
Key features
- Plots Nostr contact-list graph as points in 2D
- Colors nodes using Louvain community detection
- Arranges points with Force2Vec force-directed layout
- Built on a dataset from sps.bio
- Includes a linked live demo
- Dataset covers roughly 30 days before 2023-10-12
Best for: Developers and Nostr users interested in exploring the structure of contact-list relationships between public keys.
Good for
- Published under the MIT license with source files and a live demo available
- Combines community detection and force-directed layout in one view
- States its dataset scope, including the contact-count threshold and date range
Watch out for
- Described by its author as an experiment, with pubkey recommendation only framed as a possibility
- Only includes contact list events with at least 5 contacts from roughly the 30 days before 2023-10-12, so the graph is a fixed snapshot
- Depends on third-party data from sps.bio
contact cloud at a glance
- Category
- Social & Communities › Nostr
- Type
- Open-source project
- Pricing
- Not confirmed. Check the site
- Open source
- Yes · Source code
- Language
- English
- Last checked
- Oct 6, 2026 · Online when checked
- Listed
- Oct 5, 2026
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contact cloud FAQ
What data does Contact Cloud use?
It uses data from sps.bio based on all contact list events with at least 5 contacts from roughly the last 30 days before 2023-10-12.
Can I try it without running it myself?
The README links to a live demo.
How is the project licensed?
The repository is published under the MIT license.
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