Lambda has a fairly generous free tier.<p>Here are the details on pricing:<p><a href="https:&#x2F;&#x2F;aws.amazon.com&#x2F;lambda&#x2F;pricing&#x2F;" rel="nofollow">https:&#x2F;&#x2F;aws.amazon.com&#x2F;lambda&#x2F;pricing&#x2F;</a><p>You get up to 1M requests &#x2F; month and 400,000 GB-seconds of compute time per month.<p>A default lambda function uses 128 MB of ram (0.125 GB), which gives you about 3.2 M seconds of compute time (time actually spent executing requests) every month for free.<p>Thus if you have functions that take 500 ms on average, and use the default amount of RAM, you can process about 6.4 M requests in a month for a total bill of $1.20.<p>Above the free tier limits you pay $0.20 per million requests, and $0.1667 per million GB-seconds.<p>The pricing is fairly attractive.