Starter Cloud SaaS for AWS

Monitoring:
http://www.stackdriver.com/ (Free up to 10 servers/services 2w retension, $8/server/month 6w retension, $12/server/month 13w retension)
http://copperegg.com/ (AWS $1/month/Cloudwatch-resource, Server $10/month - min $70/month)

Logging:
https://www.sumologic.com/ (Free 7d retension 500MB/day, $115/month 30d retension 1GB/day)
https://www.loggly.com/ ($49/month 7d retension 1GB/day, $109/month 15d retension 1GB/day)

Backup:
http://www.n2ws.com/ ($62.50/month for 5 instances to $500/month for 500 instances)

Altering:
https://www.opsgenie.com/ (Lite free (max 600 alterts/month, $8/user/month)

Helpdesk:
https://www.zendesk.com (Starter $1/agent/month - max 3 agents, $25+/agent/month)