Relay.app

Relay.app's whole foundation is built on a principle that other workflow automation tools see as a bug, not a feature: sometimes you just need a person to jump in the middle of a workflow to make sure everything stays on track. Instead of thinking about human approval as something that only happens at the edge cases or when things go wrong, Relay turns it into one of the primary ways it operates. You design automations where the right human or people are presented with a task to approve, provide comments, or make a decision before the workflow kicks back in and carries on its way. That's particularly important for tasks that are way too important to hand over to 100 per cent automation but would frankly drive a human mad if they had to carry them out manually each time – things like pre-publish content review, pre-signature contract approval, or pre-process budget approvals. Or even client-facing communications that might need a sign-off from a specific human before they can be sent. Relay lets you deal with all of those directly within the workflow rather than trying to hack together an arrangement of emails and file transfers. It allows the AI that's built right into the workflows to draft content, classify data, offer advice, or sum up information before passing that over to a human to take a look before the workflow can continue. That pairing of AI superpowers with human wisdom is easily the best real-world use of human-in-the-loop automation in this category. Plans for Relay start as low as $27/mo for their Starter tier. A completely frank review note here: the reason why Relay doesn't work as a truly automated, high-volume tool with zero human involvement is because it was built to work best where humans and automation are designed to work together. So while that's going to make other automation tools like n8n or Make a better fit for purely automated background workflows, it can help solve an empty hole for tools like them where judgement matters at some of those intermediate stages.

• Category: Workflow Automation
• Pricing: Paid
• Rating: 4.5 / 5 (0 reviews)
• Platforms: Web

Key features

• Human-in-the-loop steps — Build workflow steps that pause and wait for a designated human to review approve provide input or take action before continuing
• Approval workflows — Route documents decisions or outputs to specific people or teams for sign-off before the workflow proceeds
• AI assist with human review — AI drafts content classifies records or suggests decisions and surfaces output to a human for final approval before continuing
• Collaborative forms — Collect human input within an active workflow run rather than only at the trigger stage
• Multi-person collaboration — Multiple team members participate in different steps of the same workflow run
• Slack and email step delivery — Human step tasks delivered through Slack or email for review without requiring participants to log into Relay directly
• 200 plus app integrations — Connect to common tools for triggering and completing automated steps around the human review points
• Workflow templates — Pre-built templates for common approval and collaborative automation patterns

Pros & Cons

Pros

• Human-in-the-loop as a first-class design primitive rather than an afterthought covers approval workflows that fully automated tools cannot handle reliably
• AI assist plus human review combination produces the practical outcome most teams actually want — AI help with human accountability on the output
• Slack and email delivery of human steps means reviewers do not need to log into Relay to participate in workflows they are involved in
• Purpose-built for collaborative team workflows rather than bolted-on collaboration features on top of a solo automation tool
• Starter plan at $27 per month is accessible for small teams who want structured approval workflows without enterprise iPaaS pricing

Cons

• Not the right tool for fully automated high-volume background processes where no human input is needed at any step — Make n8n or Zapier are better fits
• 200 plus app integrations is narrower than general-purpose automation platforms limiting connectivity for uncommon tools in the workflow
• Approval-centric design means the full value is only captured on workflows that genuinely need human involvement at specific steps
• Less community documentation and third-party tutorial content than the major automation platforms given its smaller user base

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