1
Also covers docker and open source · same kind of open-source project
Denostr implements a Rust-based, cloud-native Nostr relay derived from nostr-rs-relay.
Alternatives
The Best Fenrir-s Alternatives in 2026
24 alternatives0 free · 23 open source
Looking for something like Fenrir-s? Here are 24 alternatives, ranked by how closely they match it on purpose, features and platforms. Of these, 23 are open source.
Fenrir-s provides a Kotlin implementation of a Nostr relay, with its source code hosted on GitHub.
Top picks at a glance
First suggestionDenostrDenostr implements a Rust-based, cloud-native Nostr relay…Another optionBostrBostr manages Nostr relay connections as a relay bouncer…
Quick comparison
| # | Alternative | Pricing | Open source | Platforms |
|---|---|---|---|---|
| 1 | Denostr | — | Yes | — |
| 2 | Bostr | — | Yes | — |
| 3 | 210Maxi | — | Yes | — |
| 4 | atomstr | — | Yes | — |
| 5 | blogo | — | Yes | — |
| 6 | awesome-nostr-japan | — | Yes | — |
| 7 | Fevela | — | Yes | — |
| 8 | bcr-relay | — | Yes | — |
| 9 | code | — | Not stated | — |
| 10 | bloom | — | Yes | Android, iOS, Linux |
All Fenrir-s alternatives
2
Also covers docker and open source · same kind of open-source project
Bostr manages Nostr relay connections as a relay bouncer, with ongoing development focused on bostr2.
3
Also covers docker and open source · same kind of open-source project
210Maxi relays Nostr events only when their content is 210 characters or fewer.
4
Also covers docker and open source · same kind of open-source project
atomstr converts RSS and Atom feeds into Nostr events by fetching feed content and publishing it through the protocol.
5
Also covers docker and open source · same kind of open-source project
The lightweight blog engine blogo backs up its content to Nostr, and its project recommends running version 3.
6
Also covers docker and open source · same kind of open-source project
This curated Japanese Nostr directory lists software, web services, clients, and related community projects.
7
Also covers docker and open source · same kind of open-source project
Fevela presents Nostr posts in a newsreader-style interface designed to help users manage attention and time.
8
Also covers open source · same kind of open-source project
Bitcredit event traffic is handled by bcr-relay, a specialized Nostr relay implementation written in Rust.
9
code
github.com/SPcitydog/ogits-nodeAlso covers docker · same kind of open-source project
O_GITS lets users host an Alpha node for a decentralized digital organism on their own machine.
10
Also covers open source · same kind of open-source project
bloom combines a self-hosted media server with a Nostr relay for decentralized media sharing.
11
Also covers open source · same kind of open-source project
ezdvm lets users run Python code behind a Nostr Data Vending Machine service.
12
Also covers open source · same kind of open-source project
connect4 supports multiplayer Connect Four over Nostr and can be hosted by players themselves.
13
Also covers open source · same kind of open-source project
cfrelay runs a Nostr relay on Cloudflare Workers and supports the basic NIP-01 protocol.
14
Also covers open source · same kind of open-source project
broadcastr transmits Nostr events from one relay to other relays as a stateless alternative to blastr.
15
Also covers open source · same kind of open-source project
blastr publishes Nostr events to multiple relays through a proxy relay running on Cloudflare Workers.
16
Also covers open source · same kind of open-source project
Citrine runs a Nostr relay on Android that lets compatible clients send and receive events through the device.
17
Also covers open source · same kind of open-source project
DDSR lists Nostr relays configured for different domain-specific purposes.
18
Also covers open source · same kind of open-source project
Coracle supports browsing multiple Nostr relays, filtering posts, and creating custom feeds.
19
Also covers open source · same kind of open-source project
Bucket provides a lightweight testing relay for Nostr client development and protocol experiments.
20
Also covers open source · same kind of open-source project
AlgoRelay lets relay operators provide ranked or filtered event feeds through an algorithmic Nostr relay.
21
Also covers open source · same kind of open-source project
relay-connect provides a user interface for connecting to BitMacro relays, with a related web interface and project links.
22
Also covers open source · same kind of open-source project
better-auth-nostr adds NIP-98 Nostr authentication to Better Auth through a plugin for login flows.
23
Also covers open source · same kind of open-source project
algia-web renders Nostr pages through server-side rendering backed by the algia command line tool.
24
Also covers open source · same kind of open-source project
amberflutter wraps the Amber Nostr signer in Flutter, enabling Android apps to connect to the signing service.
No alternatives match this filter.
Alternatives to similar tools
better-auth-nostr24 alternativesbcr-relay24 alternativescfrelay24 alternativesbroadcastr24 alternatives@bitmacro/relay-connect24 alternativesalgia-web24 alternatives
What is the best alternative to Fenrir-s?
Based on features, tags and platforms, the closest alternatives to Fenrir-s are Denostr, Bostr, and 210Maxi.
Are there open-source alternatives to Fenrir-s?
Yes: Denostr, Bostr, 210Maxi, and atomstr.
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