Skip to content
SPECIFICTION
Get listed

Crux

crux.supercraft.host

From $10/mo Free plan WebWindowsmacOSLinuxiOSAndroid
Visit crux.supercraft.host
Spec score 8.6 #12 of 37 in Game Leaderboard Software

What it is

Crux provides multiplayer game backend services for player authentication, persistent data, leaderboards, server registration, live configuration, game economies, and matchmaking. Authentication supports email and password, guest sessions, Google, GitHub, and Discord OAuth, as well as Roblox verification. Developers can store player- or project-scoped JSON documents and configure ranked or seasonal leaderboards with recurring resets. Economy tools handle currencies, virtual items, and inventories through atomic, server-authoritative updates. Matchmaking queues players by game mode and region, then assigns them to live servers from the dedicated server registry. The maker lists Unity, Roblox, Godot, and custom game servers as integrations, with client SDKs for JavaScript, Godot, Unity, and Roblox. The hosted API is documented with OpenAPI, and client SDKs are MIT-licensed; the managed backend is proprietary. Crux has a free Dev plan and paid plans from $10.00 per month. Runtime is a capacity-gated closed alpha for Godot 4 Linux dedicated-server exports, with Dev evaluation limited to admitted projects. Crux says it best suits dedicated-server multiplayer survival or co-op games.

Spec sheet

Product
Crux provides multiplayer game backend services including player authentication, persistent data, leaderboards, server registry, live config, economy, and matchmaking.Read 4 Oct 2026 · crux.supercraft.host
Intended users
Crux says it is best suited to dedicated-server and multiplayer survival or co-op games, including indie and mid-size studios, and less suited to offline single-player games.Read 4 Oct 2026 · crux.supercraft.host
Integrations
The maker lists Unity, Roblox, Godot, and custom game servers as supported integrations, and publishes JavaScript, Godot, Unity, and Roblox client SDKs.Read 4 Oct 2026 · crux.supercraft.host
Security
Crux describes PostgreSQL row-level security, environment isolation, and separate API key, server token, and player JWT access modes.Read 4 Oct 2026 · crux.supercraft.host
Privacy
The maker says player data is processed on the game developer's behalf, and states that it does not sell personally identifying profile data to third parties.Read 4 Oct 2026 · crux.supercraft.host
Support
Dev includes community support, Launch includes email support, and Scale includes priority email support.Read 4 Oct 2026 · crux.supercraft.host
API and SDK licensing
The hosted API is documented as OpenAPI, client SDKs are MIT-licensed, and the managed backend is proprietary.Read 4 Oct 2026 · crux.supercraft.host
Authentication
Player authentication supports email and password, guest sessions, Google, GitHub and Discord OAuth, and Roblox verification.Read 4 Oct 2026 · crux.supercraft.host
Data and leaderboards
Crux stores player-scoped and project-scoped JSON documents and offers ranked and seasonal leaderboards with configurable rules and recurring resets.Read 4 Oct 2026 · crux.supercraft.host
Data portability
The maker states that stored players, documents, leaderboard entries, economy balances, and config bundles are readable through the API and promises advance notice and an export window if Crux winds down.Read 4 Oct 2026 · crux.supercraft.host
Game economy
The economy feature supports currencies, virtual items, and inventories with atomic server-authoritative updates.Read 4 Oct 2026 · crux.supercraft.host
Limits
Runtime evaluation for admitted Dev projects is limited to three lifetime hours, one concurrent session, and a one-hour session cap; self-hosting is not a shipping feature.Read 4 Oct 2026 · crux.supercraft.host
Matchmaking and registry
Matchmaking queues by game mode and region and assigns players to live servers from the dedicated server registry.Read 4 Oct 2026 · crux.supercraft.host
Runtime
Crux Runtime is a capacity-gated closed alpha that runs Godot 4 Linux dedicated-server exports as isolated EU processes.Read 4 Oct 2026 · crux.supercraft.host

Plans and prices

Dev Free $0 forever 10,000 MAU/month · 2M API calls · 10 req/s peak · 3 active servers · unlimited projects · 2 environments each · all BaaS features · Runtime evaluation: 3 lifetime hours when admitted · community support · no credit card Read 4 Oct 2026 · crux.supercraft.host
Launch $10 a month $10 / month 25,000 MAU/month · 25M API calls · 100 req/s peak · 100 active servers · 4 environments · one project · 50 GB player documents · email support Read 4 Oct 2026 · crux.supercraft.host
Scale $79 a month $79 / month 500,000 MAU/month · 500M API calls · 1,000 req/s peak · 2,000 active servers · 8 environments · one project · 1 TB player documents · priority email support Read 4 Oct 2026 · crux.supercraft.host
Custom Priced on request Commercial terms by agreement Custom MAU and API limits · custom project and environment limits · custom storage and resource limits · support terms agreed with your team Read 4 Oct 2026 · crux.supercraft.host

Every Crux plan and price →

Strong points and limits

Strong points

  • Authentication includes guest, OAuth, and Roblox verification
  • Ranked and seasonal leaderboards support configurable rules
  • Economy updates are atomic and server-authoritative
  • Client SDKs cover JavaScript, Godot, Unity, and Roblox

Limits

  • Runtime is a capacity-gated closed alpha
  • Admitted Dev projects get three lifetime Runtime hours
  • Self-hosting is not a shipping feature
  • Player segmentation and experimentation are not offered

Who it suits

Crux suits indie and mid-size studios building dedicated-server multiplayer survival or co-op games. The maker says it is less suited to offline single-player games.

Verdict

Crux brings authentication, game data, economies, leaderboards, and matchmaking into one managed backend. Its Runtime is still a limited closed alpha, and the managed backend is proprietary.

Where Specifiction places it

Alternatives to CruxAll alternatives →