Relay.app vs Zapier: Overview
Relay.app is a human-in-the-loop AI automation platform that emphasizes collaborative workflows where humans can review and approve steps before they execute. It connects hundreds of apps and integrates with top AI models, positioning itself as an automation platform users will "love to use."
Zapier is an established automation platform that connects over 9,000 apps and workflows. It has expanded beyond traditional Zaps to include Tables (data storage), Forms (input capture), Canvas (workflow planning), Agents (AI assistants), and Chatbots. Zapier recently introduced MCP (Model Context Protocol) for AI orchestration capabilities.
Feature comparison
| Feature | Relay.app | Zapier |
|---|---|---|
| Pricing model | Freemium | Freemium |
| Free plan | Yes | Yes |
| Free trial | No | No |
| App integrations | Hundreds of apps (targeting 200+ by end of 2025) | 9,000+ app connections |
| AI capabilities | Integrates with top AI models, AI automation | AI automation, Agents, Chatbots, MCP for AI orchestration |
| Human-in-the-loop | Core feature for workflow approval | Not mentioned |
| Additional products | Workflow automation | Zaps, Tables, Forms, Canvas, Agents, Chatbots |
| Developer features | Not mentioned | Functions (code workflows in web IDE), SDK Beta, MCP |
Where Relay.app wins
Human-in-the-loop automation: Relay.app's core differentiator is its human-in-the-loop approach, allowing team members to review and approve automation steps before execution. This is valuable for workflows requiring oversight or judgment calls.
Rapid feature development: User reviews highlight that feature requests are "often added to the product" with rapid implementation timelines. Reviewers note team flexibility in adding cost-saving features, with monthly releases throughout the year.
Workflow history and rollback: The platform includes workflow history with the ability to roll back changes, providing safety and version control for automation workflows.
Where Zapier wins
Massive integration ecosystem: With 9,000+ app connections compared to Relay.app's hundreds, Zapier offers significantly broader integration possibilities for connecting diverse tools and services.
Comprehensive product suite: Zapier provides a full platform including Tables for data storage, Forms for input capture, Canvas for workflow planning, and dedicated AI products (Agents, Chatbots), offering more built-in capabilities beyond basic automation.
Advanced developer features: Zapier offers Functions for coding workflows in a web IDE, SDK Beta for AI coding agents, and MCP for integrating Zapier into AI chat interfaces, providing more technical flexibility for advanced users.
Pricing comparison
Both platforms operate on a freemium model with free plans available and no free trials offered. Relay.app's paid plans begin at a higher entry point than Zapier's. Zapier's free tier provides 100 tasks per month, making it accessible for light automation needs. Both platforms gate advanced features and higher task volumes behind paid tiers, though the specific limitations and capabilities at each tier differ between the two services.
Who should choose Relay.app?
Relay.app is ideal for teams that need human oversight in their automation workflows, such as those handling sensitive approvals, content review, or decision-making processes. It suits organizations that value rapid feature development and responsive product teams, particularly those willing to provide feedback that shapes the platform. Teams looking for workflow version control and rollback capabilities will also benefit from Relay.app's approach.
Who should choose Zapier?
Zapier is the better choice for users needing extensive app integrations across a wide variety of services, especially if connecting niche or specialized tools. It suits teams wanting an all-in-one platform with data storage, forms, and AI assistants built in. Organizations with technical resources will appreciate Zapier's developer features like Functions and SDK. Zapier also works well for those starting small with the free tier's 100 tasks per month and scaling up as automation needs grow.
Verdict
The choice between Relay.app and Zapier depends primarily on integration breadth versus workflow philosophy. Zapier's 9,000+ integrations and comprehensive product suite make it the more versatile platform for most automation scenarios, especially when connecting diverse tools or requiring built-in data storage and AI agents. However, Relay.app offers a compelling alternative for teams specifically needing human-in-the-loop workflows where approval and oversight are essential. Relay.app's rapid feature development and responsive team may also appeal to organizations wanting to influence their automation platform's evolution. For broad automation needs and maximum integration options, Zapier remains the safer choice; for collaborative, approval-based workflows with human checkpoints, Relay.app's specialized approach delivers unique value.