1
Also covers browser extension · open source
Blockcore Notes stores public and personal notes on decentralized infrastructure using Nostr.
Alternatives
The Best Coolr Alternatives in 2026
16 alternatives1 free · 13 open source
Looking for something like Coolr? Here are 16 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 1 are free or have a free plan and 13 are open source.
Join ephemeral group chats on Nostr with Coolr, an open-source service that organizes public channels by hashtag.
Top picks at a glance
First suggestionBlockcore NotesBlockcore Notes stores public and personal notes on…Free or freemium optionBitcoiner ChatGet a free NIP-05 identifier by submitting your Nostr name…Another optionClonableMove a Nostr profile, follows, mutes, and relays to a new…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | Blockcore Notes | — | Yes | Browser extension |
| 2 | Clonable | — | Not stated | Browser extension, Web |
| 3 | better-auth-nostr | — | Yes | Browser extension |
| 4 | Aka Profiles | — | Not stated | Browser extension |
| 5 | Bunker46 | — | Yes | Browser extension |
| 6 | danmakustr | — | Yes | Browser extension |
| 7 | Blockcore | — | Yes | Browser extension |
| 8 | dart NDK | — | Yes | — |
| 9 | bark | — | Yes | — |
| 10 | @bitmacro/relay-connect | — | Yes | — |
All Coolr alternatives
2
Clonable
mutable.top/clonableAlso covers browser extension and web browser · same kind of website
Move a Nostr profile, follows, mutes, and relays to a new keyset when recovering from a compromised key.
3
Also covers browser extension · open source
better-auth-nostr adds NIP-98 Nostr authentication to Better Auth through a plugin for login flows.
4
Aka Profiles
github.com/neilck/aka-extensionAlso covers browser extension
Aka Profiles adds Nostr signing support to Chrome through a browser extension that handles multiple profiles.
5
Also covers browser extension · open source
Remote NIP-46 signing is exposed to Nostr web clients through Bunker46, a NIP-07 browser extension.
6
Also covers browser extension · open source
danmakustr adds decentralized scrolling comments to YouTube videos through a Chrome extension based on Nostr.
7
Also covers browser extension · open source
Blockcore Wallet manages coins, tokens, identities, and NFTs through a browser-based Web5 wallet.
8
Also covers browser extension · open source
Dart NDK provides a Dart development kit with high-level use cases for building Nostr applications.
9
Also covers browser extension · open source
bark signs Nostr events through a NIP-07 interface backed by NIP-46 remote signing.
10
Also covers browser extension · open source
relay-connect provides a user interface for connecting to BitMacro relays, with a related web interface and project links.
11
Open source
Denny focuses on encrypted group chats in a Nostr-based instant messaging client.
12
Same kind of website · free
Get a free NIP-05 identifier by submitting your Nostr name and public key, then add it to a Nostr client.
13
Open source
Boris organizes a reading list for the Nostr community, turning Nostr links into a personal collection.
14
Open source
Corny Chat offers open-source audio spaces that integrate Nostr and Lightning.
15
Open source
Blossom specifies HTTP endpoints for storing blobs on media servers using Nostr public and private keys for identity.
16
Open source
Contact Cloud visualizes a Nostr contact-list graph, with the project exploring proximity between public keys.
No alternatives match this filter.
Alternatives to similar tools
better-auth-nostr24 alternativesBlockcore Notes24 alternativesAka Profiles15 alternativesClonable24 alternativesdart NDK24 alternatives@bitmacro/relay-connect24 alternatives
What is the best alternative to Coolr?
Based on features, tags and platforms, the closest alternatives to Coolr are Blockcore Notes, Clonable, and better-auth-nostr.
Is there a free alternative to Coolr?
Yes. Bitcoiner Chat is free or offer a free plan.
Are there open-source alternatives to Coolr?
Yes: Blockcore Notes, better-auth-nostr, Bunker46, and danmakustr.
Alternatives are suggested from the purpose and features described in our listings. Different pages for the same product appear once. Read each description to check whether it fits your task. How we choose alternatives · Suggest an alternative