TurboMqtt v1.0.0

1.0.0 March 24 2026

TurboMqtt v1.0.0 is the first stable release, promoting all features from v1.0.0-beta1 to production-ready status.

New Features

• Full MQTT 5.0 support — complete encoder/decoder, User Properties, server-initiated DISCONNECT handling, and authentication.
• TLS/mTLS support — server certificate validation, self-signed certs, and mutual TLS with client certificates.
• Transport layer redesign — cleaner separation between TCP, TLS, and fake transports.
• .NET 10 support — now targets net10.0.

Bug Fixes

• Fix HeartBeatActor firing heartbeat timeout twice on slow reconnects.
• Fix two race conditions in TcpTransportActor.
• Fix race condition causing spurious reconnect during user-initiated disconnect.
• Fix race: remove internal connect deadline from ClientAcksActor.

Performance

• Major MQTT encoder performance optimizations and decoder fixes.
• Harden encoders against packet overflows.

Security

• Pin vulnerable transitive package versions.

TurboMqtt v1.0.0-beta1

1.0.0-beta1 February 23rd 2026

TurboMqtt v1.0.0-beta1 is a major release bringing full MQTT 5.0 support, TLS/mTLS, a redesigned transport layer, and a significant round of bug fixes and spec compliance work.

New Features

• Full MQTT 5.0 support — complete encoder/decoder, User Properties on CONNECT and PUBLISH, server-initiated DISCONNECT handling, and authentication; validated end-to-end against EMQX 5.x.
• TLS/mTLS support — CreateTlsTcpClient with MqttClientTlsOptions for server certificate validation, self-signed certs, and mutual TLS with client certificates.
• Transport layer redesign — cleaner separation between TCP, TLS, and fake transports; improved testability.
• .NET 10 support — now targets net10.0; upgraded CI to .NET 10 SDK.

Bug Fixes

• Fix HeartBeatActor firing heartbeat timeout twice on slow reconnects.
• Fix two race conditions in TcpTransportActor causing flaky tests on Linux.
• Fix race condition causing spurious reconnect during user-initiated disconnect.
• Fix race: remove internal connect deadline from ClientAcksActor.

Performance

• Major MQTT encoder performance optimizations and decoder fixes.
• Harden encoders against packet overflows.

TurboMqtt v0.2.0

0.2.0 June 14th 2024

• License has been migrated to Apache 2.0
• Upgraded to Akka.NET v1.5.25.

TurboMqtt v0.1.1

0.1.1 May 2nd 2024

TurboMqtt v0.1.1 includes critical bug fixes and massive performance improvements over v0.1.0.

Bug Fixes and Improvements

• Fixed QoS=1 packet handling - was previously treating it like QoS=2.
• Improved flow control inside ClientAckHandler - result is a massive performance improvement when operating at QoS 1 and 2.
• Fix OpenTelemetry TagList for clientId and MQTT version - now we can accurately track metrics per clientId via OpenTelemetry.

Performance

BenchmarkDotNet v0.13.12, Windows 11 (10.0.22631.3447/23H2/2023Update/SunValley3)
12th Gen Intel Core i7-1260P, 1 CPU, 16 logical and 12 physical cores
.NET SDK 8.0.101
  [Host]     : .NET 8.0.1 (8.0.123.58001), X64 RyuJIT AVX2
  Job-FBXRHG : .NET 8.0.1 (8.0.123.58001), X64 RyuJIT AVX2

InvocationCount=1  LaunchCount=10  RunStrategy=Monitoring  
UnrollFactor=1  WarmupCount=10  

Method	QoSLevel	PayloadSizeBytes	ProtocolVersion	Mean	Error	StdDev	Median	Req/sec
PublishAndReceiveMessages	AtMostOnce	10	V3_1_1	5.175 μs	0.6794 μs	2.003 μs	4.345 μs	193,230.35
PublishAndReceiveMessages	AtLeastOnce	10	V3_1_1	26.309 μs	1.4071 μs	4.149 μs	25.906 μs	38,010.35
PublishAndReceiveMessages	ExactlyOnce	10	V3_1_1	44.501 μs	2.2778 μs	6.716 μs	42.175 μs	22,471.53

Learn more about TurboMqtt's performance figures here.

TurboMqtt v0.1.0

0.1.0 May 1st 2024

Fully functioning MQTT 3.1.1 support without TLS. Hitting 160k msg/s in our benchmarks on QoS=0 - see TurboMqtt Performance for details.

Fixed some client resiliency problems, protecting against broker disconnect and failure scenarios with clean automatic restarts.

Upgraded to Akka.NET 1.5.20.