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Relay.app

Automation that pauses for a human's approval, by design

4.5 Automation
4.5 Excellent 4.5

Bottom line: Relay.app is a top-tier automation tool, best known for built-in human approval steps within workflows. It has a free plan.

Human-in-the-loop approval addresses a real hesitation around full automation Approval steps add latency compared to fully autonomous workflows
Reviewed by Challenging Voice Editorial · Updated Jul 2026 How we rate
PricingFrom $19/mo
Free planYes
CompanyRelay.app Inc.
PlatformsAPI, Web
Best forAutomation
Founded2021
Visits20
Last reviewedJun 2026
UpdatedJul 2026
Ask AI about Relay.app ChatGPT Claude Perplexity

Overview

Relay.app, founded in 2021, builds human approval steps into its core workflow logic rather than treating full autonomy as the goal: a workflow can pause at a specific point, sending a request to a person in Slack or email, and wait for approval before continuing, rather than executing every step automatically end to end.

That built-in pause point matters for AI-driven automation specifically, where a generated email, a financial action, or a customer-facing message might need a human glance before going out, and Relay treats that checkpoint as a standard workflow feature rather than something bolted on as an afterthought. A modern, clean interface reflects its more recent founding relative to older category incumbents.

A free tier covers limited monthly workflow runs, and paid plans start around $19 a month for more volume and advanced approval logic. For a team that wants AI-powered automation but isn't comfortable letting every action run fully autonomously, Relay's human-approval-first design addresses that specific hesitation more directly than platforms built around full autonomy as the default.

Key features

  • Built-in human approval steps within workflows
  • Pauses for Slack or email approval before continuing
  • Modern interface built for AI-era automation needs
  • AI-generated content review before customer-facing actions
  • Free tier with limited monthly runs
  • Approval logic treated as a core feature, not an add-on

Screenshots & demo

Pricing

Relay.app has a free plan, and paid plans start at $19/mo.

  • Pricing modelFreemium
  • Starting priceFrom $19/mo
  • Free planYes
Visit Relay.app

Pricing is provided as a guide. Check the official site for the latest plans.

Pros & cons

Pros

  • Human-in-the-loop approval addresses a real hesitation around full automation
  • Modern, clean interface reflects a more recent design approach
  • AI-generated actions can get a human check before executing
  • Free tier available for testing

Cons

  • Approval steps add latency compared to fully autonomous workflows
  • Newer platform with a smaller integration library than established competitors
  • Best suited to teams specifically wanting oversight, not maximum automation speed

How it compares

ToolRatingFreeFromBest known for
Relay.app (this tool)4.5Yes$19/moBuilt-in human approval steps within workflows
Magical4.6Yes$10/moKeyboard-triggered text expansion with live data pulling
Pipedream4.6Yes$45/moInline Node.js, Python, Go, and Bash code in any workflow step
Browser Use4.5Yes$29/moOpen-source Python library for AI-controlled browser automation

Our verdict

4.5 / 5 4.5

Relay.app is an excellent automation tool, best known for built-in human approval steps within workflows. It offers a free plan, with paid upgrades from $19/mo.

What makes it different: Relay.app stands out for built-in human approval steps within workflows.

How we score it
Overall 4.5
Value for money 4.7
Feature depth 4.9
Popularity 4.0
Best for ProfessionalsTeamsCreatorsCurious learners

Frequently asked questions

What is Relay.app?
Relay.app is an automation tool listed in the Challenging Voice directory. Automation that pauses for a human's approval, by design.
Is Relay.app free?
Yes, Relay.app offers a free plan. Paid plans unlock more features and higher usage limits, starting at $19/month.
How much does Relay.app cost?
Relay.app starts at $19 per month. See the pricing plans above for full details.
What are the best Relay.app alternatives?
Popular alternatives to Relay.app include Hatz AI, Kissflow Digital Workplace, and Hyperscience. Browse them all in the Automation category.
Is Relay.app any good?
Relay.app scores 4.5 out of 5 based on our editorial review.

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