# Relay.app

**Source:** https://geo.sig.ai/brands/relayapp  
**Vertical:** Productivity & Collaboration  
**Subcategory:** AI Workflow Automation  
**Tier:** Emerging  
**Website:** relay.app  
**Last Updated:** 2026-04-14

## Summary

Human-in-the-loop workflow automation; $35M Series A from a16z and Khosla (Mar 2025); connects 100+ apps with embedded human approval steps for AI-human collaboration. Founded 2021, SF.

## Company Overview

Relay.app is a human-in-the-loop workflow automation platform founded in 2021 in San Francisco. The company was built around the insight that fully automated workflows break down at the edges — when decisions require human judgment, context that only a person has, or approval before an irreversible action. Relay.app's core design principle is that AI agents and humans should collaborate in workflows rather than the AI operating autonomously.\n\nThe platform connects to 100+ applications including Salesforce, HubSpot, Slack, Gmail, Notion, and Airtable, enabling teams to build complex cross-app automations with embedded human checkpoints — approval steps, form fills, and manual decisions that slot naturally into otherwise automated flows. Relay.app's AI agents can draft content, classify data, extract information from documents, and make routing decisions, with humans stepping in only where judgment is needed. Target users are operations, revenue, and customer success teams at mid-market B2B companies.\n\nRelay.app raised a $35 million Series A in March 2025 co-led by Andreessen Horowitz and Khosla Ventures, validating its human-in-the-loop positioning in a market increasingly crowded with fully autonomous automation tools. The funding has accelerated the expansion of its AI agent capabilities and integration library. Relay.app competes with Zapier, Make, and newer AI automation platforms but differentiates through its thoughtful balance between automation efficiency and human oversight.

## Frequently Asked Questions

### What is Relay.app?
Workflow automation combining AI-powered actions with human-in-the-loop decision steps across 100+ apps.

### How much has Relay.app raised?
$35M Series A (March 2025) from a16z, Khosla Ventures, SV Angel.

### What makes it different?
Human-in-the-loop approach: AI handles routine tasks, humans approve critical decisions.

### What is Relay.app and how does it differ from other automation platforms?
Relay.app is a workflow automation platform that combines automated triggers and actions with human-in-the-loop approval and review steps — enabling workflows that include both fully automated steps and points where a human must review, approve, or enrich the data before automation continues, addressing the gap between all-or-nothing automation tools and fully manual processes.

### What integrations does Relay.app support for workflow building?
Relay.app integrates with Gmail, Google Sheets, Slack, Notion, HubSpot, Airtable, Linear, and other common business tools — allowing teams to build automated workflows that span their existing tool stack without requiring custom code, with triggers based on events in connected tools and actions that create, update, or send data across multiple systems in a coordinated sequence.

### What are human-in-the-loop steps in Relay.app and when are they useful?
Human-in-the-loop steps in Relay.app pause an automated workflow and prompt a specific person to review information, make a decision, or add context before the workflow continues — useful for workflows like contract approvals where a manager must sign off before an automated action, content publishing where an editor must review before publication, or data enrichment where a human needs to fill in information the automation cannot determine automatically.

### How does Relay.app handle AI steps in workflows?
Relay.app includes native AI actions powered by large language models that can classify incoming data, extract structured information from unstructured text, draft personalised content based on context, and make routing decisions — allowing teams to add AI-powered steps to their workflows without custom API integration, and combining AI automation with the human review steps that ensure quality and accountability for consequential decisions.

### How is Relay.app priced?
Relay.app offers a free plan for individuals and small teams with limited workflow runs per month, with paid plans that increase run limits and unlock additional features such as more integrations, higher AI step volume, and team collaboration features — targeting teams that want more flexibility than Zapier but a simpler interface than code-based automation tools.

## Tags

b2b, productivity, saas, collaboration

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*Data from geo.sig.ai Brand Intelligence Database. Updated 2026-04-14.*