Fusioncat

Zero-chaos async data flows orchestration for backend systems

  • Kafka/AMQP/MQTT support
  • Schema registry
  • IDE for async arhitecture
  • Developers-first
  • CI/CD ready
  • JSONSchema/Avro/Protobuf support
a 0-chaos infrastructure orchestration platform for agenticSystems

Vision

While service architecture is mainstream (85 % adoption), engineers spend ~30% of time on integration-related topics

From design to production
All involved parties design together all interactions between services, servers and apps. The design covers all data contracts, communication channels and the logic of cross-service interactions.
Codegen
Fusioncat generates all the boilerplate code based on definitions of system design. The code is also controlling schema compatibility between servers and prevents errors.
Open-source
Fusioncat is made by developers for developers. We develop and maintain open source libraries, tools and SDKs.
Enterprise
Fusioncat is designed to meet the needs of large organizations, offering advanced security, compliance, and dedicated support. On-premise deployment is available upon request.
Community
We believe in the power of open collaboration and shared knowledge. You can share your projects with anyone, helping build best practices and standards around the community.
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Overview

one tool for full-cycle development: from design to deployment

Design complex relationships and dependencies with visual nodes

Fusioncat's ability to display complex systems as visual relationship maps allows product teams to understand and design complex software with sophisticated business logic faster than ever. This leads to quicker implementation of new applications and reduced onboarding time for new team members.

full-cycle infrastructure development re-thinked in the better way
full-cycle infrastructure development re-thinked in the better wayfull-cycle infrastructure development re-thinked in the better way

3X

Faster onboarding for engineers

Share projects with others

Just like in GitHub, Figma, or Google Sheets, you can share projects publicly or keep them private, setting permissions for viewers, editors, or admins.

Anyone with the link

Can view

t

You

Owner

a

Timothy

Can edit

Control versions and changes and know exactly what is going on

Often service architecture collapses due to a lack of understanding of what has changed in the cross-service interactions. Fusioncat stores every update and change made to your project, entity, or code, and there is no way to delete or lose anything. Even the oldest files are stored permanently and can always be backed up.

Today

Maxim K.
Maxim K. Released notificationSchema to 3.2
A
Alex S. Deployed Beloved Wren 80
Last week
John D.
John D. Updated chatNotifications channel
N
Nikita A. Deployed Mystic Panther 17
Maxim K.
Maxim K. Released slackBotApp
T
Tim. Updated emailSchema to 1.4

Store and update message schemas

65% of production outages are triggered by code/config changes in distributed systems. Data contract mismatches are a common cause of these issues. Our schema registry allows you to store message schemas in JSON, Protobuf, and Avro. You can quickly update and rearrange them while keeping all versions in one library.

Schemas

  • analyticsSchema
  • userEventSchema
  • emailSchema
  • notificationSchema
  • paymentSchema
  • userEventSchema

Json

proto

avro

Store and update message schemas

Connect brokers, databases, MCP servers, and LLMs

Fusioncat supports AMQP, MQTP, and Kafka, works with databases via REST, and allows you to work with AI-agents via MCP.

Kafka
rabbitmq
Artemis
Azure
qpid
AWS IoT
HiveMQ
Mosquitto
EMQX
MCP
And more

Deploy with any language

Fusioncat's YAML supports config compilation into any imaginable programming language. With current support for 20 languages, you can always add your own by simply committing to our codebase.

2.5X

Faster deploying

Debug code

Use the pre-built syntax checker, dependency mapper, and AI helper to find miscalculations and errors, and build infrastructure faster.

channels:
lightingMeasured:
address: 'smartylighting.streetlights.1.0.event.{streetlightId}.lighting.measured'
messages:
lightMeasured:
$ref: '#/components/messages/lightMeasured'
description: 'The topic on which measured values may be produced and consumed.'
parameters:
streetlightId:
$ref: '#/components/parameters/streetlightId'
lightTurnOn:
address: 'smartylighting.streetlights.1.0.action.{streetlightId}.turn.on'
messages:
turnOn:
$ref: '#/components/messages/turnOnOff'
parameters:
streetlightId:
$ref: '#/components/parameters/streetlightId'
lightTurnOff:
address: 'smartylighting.streetlights.1.0.action.{streetlightId}.turn.off'
messages:
turnOff:
$ref: '#/components/messages/turnOnOff'

99%

of critical bugs and errors found automatically

Prefer the terminal? Use all of Fusioncat's features via Paw — our terminal client

Available for OS X, Windows, and *nix.

❯ ./paw
NAME:
paw - A new cli application
USAGE:
paw [global options] [command [command options]] [arguments...]
VERSION:
0.1.0
DESCRIPTION:
An official fusioncat CLI
COMMANDS:
init-settings-file paw init-settings-file
authAuthentication commands
codegenGenerate code from project definitions
appsManage apps
schemasManage schemas
messagesManage messages
projectsManage projects
workspacesManage workspaces

pricing

start using fusioncat for free. scale when you are ready

Free tier

Perfect for exploring the basics—upgrade anytime to unlock advanced features.

2 personal projects

200 entities

Multiplayer mode

Auto-deployment

Debugging

Plus

Go from idea to deployed infrastructure in hours. Ideal for solo developers with live projects.

5 personal projects

Unlimited entities

Debugging

Auto-deployment

$19,90 / mo

$16,99 if paid annually

Agency

Save time working on multiple project together in real time. Perfect for startups and small teams.

Everything from plus plan

Unlimited projects

6 editors seats

Unlimited viewers

$199 / mo

$185,90 if paid annually

Company

Tailored for organizations needing advanced collaboration and enterprise-level flexibility.

Everything from agency plan

20 editors seats workspace

Custom integrations

$1990 / mo

$1800 if paid annually

Enterprise

Implement Fusioncat into your company's workflow and get measurable results instantly, saving substantial time for high-cost engineers and C-suite executives involved in engineering.

Everything is unlimited

On-premise license

Custom integrations and development

Source code access

24/7 support

Our free-tier allows you to fully use the functionality, while working alone

coming Q3 2025

become the first to explore fusioncat

Fusioncat is currently in closed alpha testing. Sign up for the waitlist and get a chance to become one of the first public testers.

a 0-chaos infrastructure orchestration platform for agenticSystems
a 0-chaos infrastructure orchestration platform for agenticSystems