How Relay.app and Cassidy compare on what matters most

Ease of use

Both tools are designed for non-technical users, but they get there differently.

With Relay.app, you describe what you want in plain language and the Relay.app Agent builds the workflow for you. It can also edit, improve, and analyze your workflows through conversation. The visual builder makes it clear exactly what will happen when a workflow runs. Users consistently call it one of the easiest automation tools they've used.

Cassidy also offers no-code workflow creation and lets you stand up workflows and agents in hours. But Cassidy leans more toward enterprise use cases, and setup can involve configuring your knowledge base, connecting data sources, and tuning agents to understand your company's terminology. That's powerful, but it's a heavier lift upfront.

Integrations

Relay.app offers 200+ native integrations with popular tools like Google Workspace, Slack, HubSpot, Salesforce, and more. If there's an integration it doesn't have yet, you can use custom HTTP requests or MCP servers to connect your tools.

Cassidy integrates with 100+ tools, with a strong focus on knowledge sources like Google Drive, SharePoint, Notion, and OneDrive. It also connects to CRMs, support platforms, and communication tools like Slack and Microsoft Teams. For anything custom, Cassidy supports webhooks and API connections.

If you need broad app-to-app automation, Relay.app has the edge. If your integrations are mostly about pulling in company knowledge and data, Cassidy covers the essentials.

AI capabilities

Relay.app includes built-in access to all the leading AI models, including OpenAI, Anthropic, and Gemini. You don't need to manage API keys (though you can bring your own if you have one!). AI is woven into every part of the platform, from generating content to classifying data to making decisions. You also get included AI credits on every plan, so there's no separate billing to manage.

Cassidy also supports multiple AI models, including OpenAI, Claude, and Gemini, with 8+ models available to choose from. Cassidy's differentiator is that every AI action runs with your company's full context pulled from its knowledge base. That means responses are grounded in your actual documents, brand voice, and internal processes rather than generic AI output.

Human-in-the-loop controls

This is where Relay.app shines. You can add human-in-the-loop checkpoints at any point in a workflow. Before the AI sends an email, updates a CRM, or takes any action, you can require a person to review and approve it. This is critical for teams that want AI speed without giving up control.

Cassidy also includes human-in-the-loop steps and guardrails. But the feature set is more geared toward enterprise workflows where guardrails and agentic reasoning handle edge cases automatically.

Knowledge management

Knowledge management is Cassidy's strongest selling point. Its unified knowledge base continuously syncs your company's documents, wikis, SOPs, and data sources. AI agents always act on the latest information, and the platform understands your specific terminology and processes. If you need AI that truly "knows" your business, Cassidy has a clear advantage here.

Relay.app offers knowledge sources on AI prompts and stateful data with Tables, which lets you store and update structured data directly within Relay.app to use across flows. Between knowledge sources and live data connections, most workflow automation use cases are covered. But if you need deep, continuously synced company knowledge across all your documents, Cassidy is purpose-built for that.

Pricing

Relay.app offers a free tier that includes 200 automation steps and 500 AI credits per month. Paid plans start at $19/month (billed annually) for the Professional plan, and the Team plan is $59/month (billed annually) for up to 10 users. All plans include free test runs so you can validate your workflows before publishing.

Cassidy has a free Starter plan with 3 users, 5 agents, 5 workflows, and 10K AI credits. They also offer a 14-day free trial. Their Business plan requires custom pricing through a demo call. There's no self-serve paid tier, which makes it harder to estimate costs or scale gradually.

Collaboration

Relay.app is built for multiplayer automation. You can share workflows and app connections across your team, making it easy for multiple people to build, manage, and monitor automations together. This is a big deal for teams that want automation to be a shared capability rather than one person's side project.

Cassidy supports team collaboration as well, with role-based access controls and shared agents. But its collaboration features are more tied to enterprise access management than day-to-day workflow building.

Security and compliance

Cassidy leads here with enterprise-grade security, including SOC 2 Type II certification, GDPR and HIPAA compliance, SSO, and role-based access controls. If you're in a regulated industry or your compliance team needs to sign off, Cassidy checks the boxes.

Relay.app offers solid security for teams of all sizes, including SOC 2 Type II certification and GDPR compliance. For most teams, that's more than enough. But Cassidy's HIPAA compliance and deeper enterprise controls give it an edge for buyers with strict regulatory requirements.

The bottom line

Choose Relay.app if you want the easiest way to build AI-powered automations that connect your apps and just work. It's more affordable, faster to set up, and better suited for teams that need reliable cross-app workflows with AI at every step. Features like Tables, MCP server support, and a collaborative workflow builder make it a powerful platform that grows with you.

Choose Cassidy if your biggest challenge is getting AI to understand your company's specific knowledge, processes, and context. It's the right pick for enterprise teams that need deeply contextual AI agents, especially for use cases like internal Q&A, RFP responses, and knowledge-intensive support.

For most teams, I recommend starting with Relay.app. It gets you to value faster and costs less to get going. If you're part of a large enterprise and you need a deeper knowledge base layer, Cassidy is worth evaluating alongside it.