We built AlertFlow because we believed the existing on-call and alerting tools weren't built for MSPs. ZenDuty is a capable tool — but it's built for software engineering teams, not managed service providers. Here's an honest breakdown of where each tool wins and loses.
Note: We are obviously biased. Read ZenDuty's own marketing too.
TL;DR comparison
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Where ZenDuty is genuinely better
ZenDuty has been around longer and has a more mature third-party integration library. If your stack is entirely software-development tooling (GitHub, Jira, Datadog, AWS CloudWatch), ZenDuty has connectors that AlertFlow is still building.
Their on-call scheduling UI is also more polished in edge cases — things like multi-team scheduling across time zones have more configuration options.
Where AlertFlow is purpose-built for MSPs
- Client-aware routing: Every alert in AlertFlow is tagged to a client account. You can build workflows that say “if client = Acme IT and severity = critical, page Sarah” — something that requires workarounds in ZenDuty.
- Pricing that makes sense for MSPs: ZenDuty charges per user. If you have 30 engineers and 200 clients, ZenDuty gets expensive fast. AlertFlow is a flat monthly rate — one price, unlimited clients.
- RMM-native integrations: Our Kaseya, ConnectWise, and N-able integrations understand the data model of those tools — agent names, machine groups, ticket IDs. ZenDuty just receives generic webhooks.
- Voice call fallback: If SMS doesn't get a response, AlertFlow calls your engineer's phone. ZenDuty doesn't offer this.
The bottom line
If you're a software engineering team at a tech company, ZenDuty is a solid choice. If you're an MSP managing client endpoints, AlertFlow was built specifically for you. The tooling reflects that in every feature.
We recommend trying both. AlertFlow has a 14-day free trial. ZenDuty does too. Import your existing PagerDuty or ZenDuty schedules into AlertFlow using our migration tool, and see which one fits your workflow better.