The Done-For-You Alternative to Rewst, iPaaS & Billing-Bridge Tools
Rewst, Workato, Zapier, and billing bridges give you the canvas. Left Hook gives you the built, managed integration layer underneath — so your PSA, RMM, docs, and accounting actually stay in sync without you hiring an automation engineer.
Challenges We Solve
These are the most common challenges facing msp integration alternatives. Click “See the solution” on any card to see how we fix it.
DIY Automation Tools Still Need an Owner
Rewst, Workato, and Zapier hand you a powerful canvas — but someone on your team still has to design, build, debug, and maintain every workflow, forever.
Managed Integration Layer
We design, build, and operate the integrations across your stack as a service — you get working outcomes, not another tool to learn and babysit. Connect, don't replace.
Brittle Workflows Break Silently
API changes, expired tokens, and edge cases quietly break DIY automations, and you often find out when an invoice is wrong or a ticket never got created.
We Run It On Your Tools or Ours
Already invested in Rewst, Workato, Zapier, or Make? We build and maintain inside them. No platform yet? We deliver the same outcomes on infrastructure we manage — your choice.
Billing Bridges Only Cover Billing
Gozynta and Wise-Sync handle PSA-to-accounting sync well, but they don't touch RMM, documentation, onboarding, or quote-to-project — leaving the rest manual.
Beyond Billing Bridges
We cover what billing bridges don't: RMM-to-PSA, alert dedup, onboarding data propagation, documentation sync, and quote-to-project — alongside (or instead of) your billing sync.
No In-House Automation Engineer
Most MSPs can't justify a full-time automation hire, so powerful platforms sit half-used and the integration backlog never shrinks.
Monitored & Maintained
Every integration we run is monitored, alerted on failure, and updated as APIs change — so workflows don't break silently and you're not the one debugging at month-end.
Common MSP Integration Alternatives Workflows
See how we automate the workflows that matter most to your business—from understanding to implementation.
What We Deliver vs. a DIY Automation Build
The DIY path means someone learns the platform, maps every field, builds error handling, and owns it forever. Our managed path means you describe the outcome and we deliver and operate it — on your platform or ours.
Get a working PSA-RMM-accounting integration without your team designing, building, and maintaining it on a DIY platform
Workflow Steps
Scope the Outcome
We map the real-world outcome you need and the systems involved instead of starting from a blank canvas
QuickBooksBuild the Integration
We build inside your tool (Rewst, Workato, Zapier, Make) or on infrastructure we manage
Validate & Map
Field mapping, edge cases, and error handling are built and tested against real data
Monitor & Operate
We monitor runs, alert on failures, and fix breakages so workflows don't fail silently
SlackEmailMaintain & Evolve
As APIs change and your needs grow, we update integrations — no internal backlog required
Data That Flows Through
Outcomes
Implementation Options
This workflow can be built on any of these platforms. Click to see implementation notes:
Ready to automate these workflows for your business?
Discuss Your WorkflowsReady to Transform Your MSP Integration Alternatives?
Choose how you'd like to get started. We'll match you with the right approach for your needs.
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Contact UsFrequently Asked Questions
Do I still need Rewst if I work with Left Hook?
Only if you want to. If you already run Rewst, we build and maintain workflows inside it so you get full value from a platform that rewards teams with time to build. If you don't have Rewst, we deliver the same outcomes on infrastructure we manage — no extra platform required. We're the managed layer, not a feature-for-feature clone of Rewst.
How is this different from Workato or Zapier?
Workato and Zapier are tools — they give you a canvas and leave the building, debugging, and maintaining to you. Left Hook is a service. We design, build, and operate the integrations for you, inside those tools or on infrastructure we run. You get working outcomes and someone accountable when an API changes, instead of another platform to learn.
What about Gozynta or Wise-Sync for billing?
Those are solid PSA-to-accounting bridges and we're happy to work alongside them. The difference is scope: billing bridges only touch billing. We cover RMM-to-PSA sync, alert dedup, onboarding propagation, documentation, and quote-to-project too — so the rest of your stack isn't left manual. Keep your bridge and we'll handle everything around it, or we can cover billing as part of a single managed layer.
Why Left Hook instead of building it ourselves?
We built both Autotask's and ConnectWise's official Zapier apps and have 9+ years on both REST APIs across 300+ platforms. We know the edge cases that break DIY builds. You get integrations that are monitored, maintained, and updated as APIs change — without pulling your techs off billable work to babysit automations.