<s>
MQTT	B-Application
is	O
an	O
ISO	O
standard	O
(	O
ISO/IEC	O
PRF	O
20922	O
)	O
publish	O
–	O
subscribe-based	O
messaging	O
protocol	O
.	O
</s>
<s>
It	O
works	O
on	O
top	O
of	O
the	O
Internet	B-Protocol
protocol	I-Protocol
suite	I-Protocol
TCP/IP	B-Protocol
.	O
</s>
<s>
The	O
publish-subscribe	B-Operating_System
messaging	I-Operating_System
pattern	I-Operating_System
requires	O
a	O
message	B-General_Concept
broker	I-General_Concept
.	O
</s>
<s>
The	O
comparison	O
is	O
limited	O
to	O
features	O
that	O
relate	O
to	O
the	O
MQTT	B-Application
protocol	I-Application
.	O
</s>
<s>
The	O
following	O
table	O
lists	O
MQTT	B-Application
both	O
libraries	O
and	O
implementations	O
,	O
along	O
with	O
general	O
information	O
about	O
each	O
.	O
</s>
<s>
Implementation	O
Developed	O
by	O
Open	O
source	O
Software	O
license	O
Copyright	O
owner	O
Programming	O
language	O
Type	O
Latest	O
stable	O
release	O
,	O
release	O
date	O
Origin	O
Adafruit	O
IO	B-Application
Adafruit	O
MIT	B-License
License	I-License
Adafruit	O
Ruby	B-Language
,	O
Node.js	B-Language
,	O
Python	B-Language
,	O
GoClient	O
2.0.0	O
,	O
US	O
Amlen	O
EclipseEPL	O
2.0Eclipse	O
FoundationCBroker1.0.0.0	O
2022-05-25	O
EMQX	O
EMQ	O
Apache	B-Application
License	I-Application
version	I-Application
2.0	I-Application
EMQ	O
Technologies	O
Inc	O
.	O
ErlangBrokerV5.0.4	O
,	O
2022-07-28ChinaEMQX	O
EnterpriseEMQNoCommercial	O
licenseEMQ	O
Technologies	O
Inc.ErlangBrokerv4.4.6	O
,	O
2022-08-02ChinaLMQTT	O
Real	O
Time	O
LogicGPL	O
or	O
commercial	O
license	O
Real	O
Time	O
Logic	O
LuaClient	O
?	O
</s>
<s>
2022-10-07	O
USNanoMQ	O
EMQ	O
MIT	O
LicenseEMQ	O
Technologies	O
Inc.CBroker	O
and	O
Client0.5.8ChinaMQTT	O
X	O
EMQ	O
Apache	B-Application
License	I-Application
version	O
2.0EMQ	O
Technologies	O
Inc.TypeScriptClientv1.7.1ChinaFairCom	O
EdgeFairCom	O
NoCommercial	O
licenseFairCom	O
CorporationCBroker3.0.0	O
,	O
2020-11-01USFlashMQ	O
Wiebe	O
Cazemier	O
AGPLv3	B-Application
Wiebe	O
Cazemier	O
C++	B-Language
Broker	O
1.3.0	O
,	O
2023-03-04	O
Netherlands	O
flespi	O
GurtamNo	O
Commercial	O
license	O
Gurtam	O
CBroker	O
2018-04-05	O
BelarusGridServerGRID	O
SystemNo	O
Commercial	O
licenseGRID	O
System	O
S.A.SPascal	O
,	O
DelphiBroker2019-09-15France	O
HiveMQ	O
MQTT	B-Application
Client	O
HiveMQ	O
Apache	B-Application
License	I-Application
version	I-Application
2.0	I-Application
HiveMQ	O
JavaClient	O
1.3.0	O
,	O
2021-12-02	O
Germany	O
HiveMQ	O
Community	O
Edition	O
HiveMQ	O
Apache	B-Application
License	I-Application
version	I-Application
2.0	I-Application
HiveMQ	O
JavaBroker	O
2023.3	O
,	O
2023-04-04	O
Germany	O
HiveMQ	O
HiveMQNo	O
Commercial	O
license	O
HiveMQ	O
JavaBroker	O
4.14	O
,	O
2023-04-04	O
GermanyIBM	O
WIoTP	O
Message	O
GatewayIBMNoCommercial	O
licenseIBMCBroker5.0.0.1	O
2019-02-29JoramMQScalAgent	O
D.T.No	O
,	O
based	O
on	O
OW2/Joram	O
5.19	O
,	O
open-source	O
broker	O
(	O
LGPL	O
)	O
Commercial	O
licenseScalAgent	O
D.T.JavaBroker1.16	O
2022-06-07FranceKMQTTDavide	O
Pianca	O
MIT	O
LicenseDavide	O
PiancaKotlinBroker0.4.1	O
,	O
</s>
<s>
A	O
more	O
complete	O
list	O
of	O
MQTT	B-Application
implementations	O
can	O
be	O
found	O
on	O
.	O
</s>
<s>
There	O
are	O
several	O
versions	O
of	O
the	O
MQTT	B-Application
protocol	I-Application
currently	O
standardized	O
.	O
</s>
<s>
Below	O
is	O
a	O
list	O
containing	O
the	O
more	O
recent	O
versions	O
of	O
the	O
MQTT	B-Application
protocol	I-Application
,	O
with	O
the	O
organization	O
that	O
standardized	O
them	O
.	O
</s>
<s>
MQTT-SN	B-Application
v1.2	O
,	O
standardized	O
by	O
IBM	O
.	O
</s>
<s>
MQTT	B-Application
v3.1	O
,	O
standardized	O
by	O
Eurotech	O
and	O
IBM	O
.	O
</s>
<s>
MQTT	B-Application
v3.1.1	O
,	O
standardized	O
by	O
OASIS	O
.	O
</s>
<s>
MQTT	B-Application
v5.0	O
,	O
standardized	O
by	O
OASIS	O
.	O
</s>
<s>
The	O
following	O
table	O
lists	O
the	O
versions	O
of	O
MQTT	B-Application
that	O
each	O
implementation	O
supports	O
,	O
and	O
also	O
lists	O
their	O
support	O
for	O
SSL/TLS	B-Protocol
and	O
TCP	B-Protocol
.	O
</s>
<s>
The	O
security	O
provided	O
by	O
SSL/TLS	B-Protocol
may	O
be	O
desirable	O
depending	O
on	O
the	O
type	O
traffic	O
being	O
sent	O
between	O
devices	O
,	O
as	O
MQTT	B-Application
transmits	O
messages	O
in	O
the	O
clear	O
.	O
</s>
<s>
From	O
the	O
MQTT	B-Application
page	O
,	O
quality	O
of	O
service	O
(	O
QoS	O
)	O
is	O
described	O
as	O
,	O
Quality	O
of	O
service	O
refers	O
to	O
traffic	O
prioritization	O
and	O
resource	O
reservation	O
control	O
mechanisms	O
rather	O
than	O
the	O
achieved	O
service	O
quality	O
.	O
</s>
<s>
ImplementationBuild	O
tools	O
Platform	O
requirementsSupported	O
operating	O
systems	O
Adafruit	O
IOAmlen	O
Make	B-Application
,	O
Ant	B-Application
Linux	B-Application
CentOS	O
,	O
Red	O
Hat	O
Enterprise	O
LinuxEMQXErlang/OTP	O
R19+	O
(	O
when	O
building	O
from	O
source	O
)	O
Linux	B-Application
,	O
Unix	B-Application
,	O
macOS	B-Application
,	O
Windows	B-Application
,	O
Raspberry	O
PiCentOS	O
,	O
Debian	O
,	O
Docker	B-Language
,	O
macOS	B-Application
,	O
Ubuntu	B-Operating_System
,	O
Red	O
Hat	O
Enterprise	O
Linux	B-Application
,	O
Windows	B-Operating_System
10	I-Operating_System
,	O
Windows	B-Device
7	I-Device
,	O
Raspbian	B-Application
(	O
Raspberry	B-Application
Pi	I-Application
OS	I-Application
)	O
FairCom	O
EdgeVisual	O
Studio	O
,	O
Make	B-Application
,	O
CMake	B-Language
,	O
gccC	O
compiler	O
(	O
ANSI	O
C/C89	O
or	O
later	O
)	O
Linux	B-Application
,	O
macOS	B-Application
,	O
Windows	B-Application
,	O
Raspbian	B-Application
(	O
Raspberry	B-Application
Pi	I-Application
OS	I-Application
)	O
,	O
Android	B-Application
flespi	O
N/A	O
(	O
it	O
's	O
cloud-based	O
)	O
HiveMQLinux	O
,	O
Unix	B-Application
,	O
macOS	B-Application
,	O
Windows	B-Application
,	O
Raspberry	O
PiCentOS	O
,	O
Debian	O
,	O
Docker	B-Language
,	O
Ubuntu	B-Operating_System
,	O
Red	O
Hat	O
Enterprise	O
Linux	B-Application
,	O
macOS	B-Application
,	O
Windows	B-Operating_System
10	I-Operating_System
,	O
Windows	B-Device
7	I-Device
,	O
Raspbian	B-Application
(	O
Raspberry	B-Application
Pi	I-Application
OS	I-Application
)	O
IBM	O
WIoTP	O
Message	O
GatewayLinuxCentOS	O
,	O
Docker	B-Language
,	O
Red	O
Hat	O
Enterprise	O
LinuxJoramMQMaven	O
,	O
JavaLinux	O
,	O
Unix	B-Application
,	O
macOS	B-Application
,	O
Windows	B-Application
,	O
Raspberry	O
PiCentOS	O
,	O
Debian	O
,	O
Docker	B-Language
,	O
Ubuntu	B-Operating_System
,	O
Red	O
Hat	O
Enterprise	O
Linux	B-Application
,	O
macOS	B-Application
,	O
Windows	B-Operating_System
10	I-Operating_System
,	O
Windows	B-Device
7	I-Device
,	O
Raspbian	B-Application
(	O
Raspberry	B-Application
Pi	I-Application
OS	I-Application
)	O
KMQTTGradle	O
,	O
KotlinLinux	O
,	O
JVM	B-Language
,	O
Windows	B-Application
,	O
Raspberry	O
PiLinux	O
,	O
Windows	B-Application
M2MqttVisual	O
Studio	O
Any	O
.NET	B-Application
platform	I-Application
(	O
.NET	B-Application
Framework	I-Application
,	O
.NET	B-Operating_System
Compact	I-Operating_System
Framework	I-Operating_System
,	O
.NET	B-Application
Micro	I-Application
Framework	I-Application
)	O
,	O
WinRTWindows	O
98	O
or	O
later	O
,	O
Windows	B-Application
Phone	O
8.1Machine	O
HeadMaven	O
,	O
LeiningenLeiningen	O
2macOS	O
,	O
Linux	B-Application
(	O
specific	O
mentions	O
of	O
Debian	O
,	O
Ubuntu	B-Operating_System
)	O
mosquitto	O
Make	B-Application
,	O
CMake	B-Language
C90	O
BSD	B-Operating_System
,	O
Linux	B-Application
,	O
macOS	B-Application
,	O
QNX	B-Operating_System
,	O
WindowsMQTT-C	O
Make	B-Application
(	O
optional	O
)	O
CMake	B-Language
(	O
optional	O
)	O
C	B-Language
compiler	O
(	O
ANSI	O
C/C89	O
or	O
later	O
)	O
Bare	O
metal	O
,	O
Linux	B-Application
,	O
macOS	B-Application
,	O
Windowsnet-mqttstackGHC	O
Paho	O
MQTTAutotools	O
,	O
CMake	B-Language
,	O
gmake	O
,	O
gcc	B-Application
,	O
g++	B-Application
or	O
clang++	B-Application
for	O
C++	B-Language
clients	O
,	O
Maven	B-Language
for	O
Java	B-Language
clients	O
ANSI	O
C	B-Language
(	O
for	O
C	B-Language
client	O
)	O
,	O
C++11	B-Language
(	O
for	O
C++	B-Language
client	O
)	O
,	O
JVM	B-Language
or	O
Android	B-Application
(	O
for	O
Java	B-Language
client	O
)	O
Varies	O
upon	O
language	O
.	O
</s>
<s>
Please	O
see	O
official	O
Eclipse	B-Application
Paho	I-Application
MQTT	B-Application
Download	O
page	O
here	O
.	O
</s>
