ThailandAirGradient builds open-source indoor and outdoor air quality monitors that track PM2.5, CO2, temperature, humidity and other pollutants. The company is known for its open hardware and firmware, letting users build, repair and integrate the monitors with platforms like Home Assistant and its own dashboard. AirGradient appeals to people who want transparent, data-driven air quality monitoring rather than a closed black box.
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USAAmazon is one of the largest smart home players through its Alexa voice assistant and the Echo family of smart speakers and displays. Beyond Echo, Amazon owns Ring and Blink for security cameras and doorbells, and its Alexa platform acts as a central hub that controls thousands of third-party smart home devices. Alexa's broad compatibility and low-cost hardware make Amazon a common starting point for new smart home users.
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Switch between each brand's full lineup, tap any product for specs, compatibility and pricing.
Air Quality MonitorsAmazonSmart Air Quality Monitor
4.2(5,536)33% OFF$69.99$46.99
DisplaysAmazonEcho Hub
3.9(1,815)$179.99
DisplaysAmazonEcho Show 10 (3rd Gen)
4.5(50,672)$249.99
DisplaysAmazonEcho Show 11
4.3(7,994)40% OFF$249.99$149.99
DisplaysAmazonEcho Show 15
4.4(6,392)29% OFF$349.99$249.99
DisplaysAmazonEcho Show 21
4.4(6,392)30% OFF$499.99$349.99
DisplaysAmazonEcho Show 5 (3rd Gen)
4.2(72,426)40% OFF$99.99$59.99
DisplaysAmazonEcho Show 8 (2025)
4.3(7,994)38% OFF$199.99$124.99
DisplaysAmazonEcho Show 8 (3rd Gen)
4.4(30,179)$149.99
PlugsAmazonSmart Plug
4.7(571,199)48% OFF$24.99$12.98
SpeakersAmazonEcho (4th Gen)
4.7(152,489)$99.99
SpeakersAmazonEcho Dot (5th Gen)
4.7(200,155)50% OFF$79.99$39.99
SpeakersAmazonEcho Dot Max
4.3(5,243)33% OFF$119.99$79.99
SpeakersAmazonEcho Pop
4.7(103,752)$39.99
SpeakersAmazonEcho Spot
4.5(45,949)50% OFF$109.99$54.99
SpeakersAmazonEcho Studio (2025)
4.0(1,340)18% OFF$219.99$179.99
SpeakersAmazonEcho Studio
4.5(41,948)$199.99
ThermostatsAmazonSmart Thermostat
4.3(135)23% OFF$119.98$92.36
Voice AssistantsAmazonEcho (4th Gen)
4.7(152,489)$99.99
Voice AssistantsAmazonEcho Dot (5th Gen)
4.7(200,155)50% OFF$79.99$39.99
Voice AssistantsAmazonEcho Hub
3.9(1,815)$179.99
Voice AssistantsAmazonEcho Pop
4.7(103,752)$39.99
Voice AssistantsAmazonEcho Show 10 (3rd Gen)
4.5(50,672)$249.99
Voice AssistantsAmazonEcho Show 15
4.4(6,392)29% OFF$349.99$249.99
Voice AssistantsAmazonEcho Show 21
4.4(6,392)30% OFF$499.99$349.99
Voice AssistantsAmazonEcho Show 5 (3rd Gen)
4.2(72,426)40% OFF$99.99$59.99
Voice AssistantsAmazonEcho Show 8 (3rd Gen)
4.4(30,179)$149.99
Voice AssistantsAmazonEcho Spot
4.5(45,949)50% OFF$109.99$54.99
Voice AssistantsAmazonEcho Studio
4.5(41,948)$199.99