Don't forget AWS CloudWatch for logs. Cost for log processing is $0.50 per GB and the minimum size of logs (just for the START/END/REPORT lines output by Lambd

Don't forget AWS CloudWatch for logs. Cost for log processing is $0.50 per GB and the minimum size of logs (just for the START/END/REPORT lines output by Lambda itself, before you start logging any of your data) is about 260 characters (or 260MB/million == $0.13/million). Honestly, unless you have gone out of your way to implement something that isn't CloudWatch for logs (and there's almost no documentation on how to do that), its not hard to get an extra 5-10KB ($2.50-$5.00/million to process by CloudWatch) of logs per request. Like AWS egress charging, CloudWatch Logs can quickly dwarf the cost of using the services themselves.