Build message-driven services with strongly typed consumers and automatic endpoint configuration. MassTransit resolves consumers through DI, manages message locks, and acknowledges only when processing succeeds.
Learn More Move Systems
Forward.
MassTransit is the .NET messaging framework that keeps modern systems moving reliably, securely, and at scale.
From simple message consumers to saga state machines and routing slips, it gives teams powerful capabilities through a consistent programming model while reducing integration complexity and operational overhead.
With over 200 million downloads and more than 200,000 deployments worldwide, MassTransit is trusted by organizations of every size in over 150 countries.
MASSIENT INC
Features
Use message contracts and consumer definitions to create and validate queues, exchanges, topics, and subscriptions automatically. MassTransit keeps transport topology aligned with your code and conventions.
Learn More Recover gracefully from transient and prolonged failures with retry and delayed redelivery policies. When processing fails, fault events and error queues provide clear paths for diagnosis and recovery.
Learn More Prevent duplicate or premature publishes by buffering outbound messages until consumer or saga persistence succeeds. Choose in-memory outbox for speed or transactional outbox for durable delivery.
Learn More Orchestrate long-running workflows with state, events, and correlation rules using an expressive C# state machine syntax. Persist saga state across messages to orchestrate complex distributed transactions.
Learn More Execute dynamic multi-step workflows with built-in compensation for distributed transactions. Routing slips support per-request itineraries and integrate naturally with sagas for visibility and recovery.
Learn More Use asynchronous request/response when a service needs an immediate answer without blocking threads. MassTransit request clients handle responses, faults, and cancellation through a task-based API.
Learn More Run the same messaging code across RabbitMQ, Azure Service Bus, Amazon SQS/SNS, SQL transport, and more. MassTransit provides a consistent programming model while exposing transport-specific capabilities when needed.
Learn More Testimonials
MassTransit gave us enterprise-grade messaging without the maintenance burden of a home-grown system. Our engineering velocity increased immediately.
CTO, National Retailer
MassTransit has the best developer ergonomics of any service-bus library we tested. Our team was productive on day one.
Engineering Director, Government Contractor
We compared build-vs-buy. The cost of maintaining our own messaging layer was multiples higher than licensing MassTransit.
CTO, Healthcare SaaS Provider
The built-in sagas and routing slips let us implement complex workflows without reinventing anything.
Sr Engineer, Global Distribution
MassTransit insulated us from vendor lock-in. Moving from RabbitMQ to Azure Service Bus was a configuration change, not a redesign.
Chief Architect, Enterprise Retail
There is a wide talent pool of engineers familiar with MassTransit. Hiring and cross-training became significantly easier.
Director of Platform Engineering, E-Commerce
The job consumers and scheduling features saved us from writing a mini-scheduler. It was already there, production-ready.
Staff Engineer, HR Tech
We replaced a custom messaging layer with MassTransit in two sprints. Reliability went up, code went down.
Principal Developer, FinTech
For regulated environments, the SQL transport was a game-changer. Auditing, encryption, and retention were already built into our database tier.
Head of Engineering, B2B SaaS
The documentation, the patterns, the testing helpers! MassTransit feels like it was written by someone who has actually operated distributed systems.
Lead Architect, Cloud Operations
Adopting MassTransit standardized our architecture across teams. It reduced onboarding time for new hires by nearly half.
Director of Engineering, Global Logistics
MassTransit has fifteen years of production usage across industries. The alternatives don’t come close in maturity or operational depth.
Chief Architect, Financial Services
We stopped fighting our message bus. MassTransit fit naturally with .NET instead of forcing a new worldview.
Senior Backend Developer, E-Commerce
MassTransit removed an entire category of bugs we kept creating in our home-grown bus. The consistency alone paid for the migration.
Senior Engineer, Logistics
License Pricing
Single Line
Perfect for small organizations with single product line
- One product, including all services and deployments
- Flat-rate pricing, no per-message or per-endpoint fees
- Annual subscription with perpetual downgrade rights
- Email support with a 72-hour response time
Multiple Line
Suitable for multiple product lines within an organization
- Everything in Single Line
- Multiple products, services, and deployments
- Guidance for cross-team deployments and scaling
- Email support with a 48-hour support response time
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After direct payment, your license key is delivered within minutes to the email address you provide. If you prefer to pay by invoice, Contact Us directly.
Frequently Asked Questions