← All verdicts
Consumer · Asked June 25, 2026
Best mattress under $500?
Verdict
Split
2 of 4 models chose Siena Signature Memory Foam Mattress
50%split
Where the models landed
Siena Signature Memory Foam Mattress
ChatGPT · Gemini
It offers the strongest overall mix of support, motion isolation, trial length, and value under $500.
2 of 4
Zinus 12" Green Tea Cooling Memory Foam Mattress
Claude
A reliably comfortable, well-reviewed cooling memory foam bed that ships free in a box and stays well under budget.
1 of 4
Siena Signature Hybrid Mattress
Grok
Wirecutter's June 2026 group-test favorite under $500 for its substantial hybrid support, strong edge support, and 180-night trial.
1 of 4