Relay.app vs Stack AI
Comprehensive side-by-side comparison — features, pricing, performance, and more.
Updated April 2026
Trust & Reliability
Stack AI
Users:10K-100K
Trusted by:Lifemd, Allworth Financial, BAE Systems +7
GDPR
SOC 2
HIPAA
Too Close to Call
Relay.app (7.3) vs Stack AI (7.2) — difference of 0.2 points
AI Comparison Summary
Relay.app
7.3
avg score
Stack AI
7.2
avg score
Relay.app leads overall.
Based on 6 dimensions
How scores are calculatedOverall Winner
Relay.app
7.3 / 10
Relay.app
Best For
Automating repetitive business processes for small business owners
Creating custom AI agents for marketing and customer support
Streamlining operational workflows with human oversight
Building integrations between various business applications
Not Ideal For
Developers looking for a code-first agent framework
Users requiring on-premise deployment for sensitive data
Organizations needing highly specialized, niche integrations not yet supported
Stack AI
Best For
IT and Enterprise Architecture teams
Legal teams automating document review and diligence
Finance departments for reconciliation and research
Customer service operations for instant inquiry resolution
Not Ideal For
Individual users or very small businesses seeking simple
low-cost AI tools
Teams without existing enterprise systems to integrate with
* Verdict is based on our algorithmic scoring of publicly available data. Learn about our methodology
Relay.app is best for
🤖Automation & Agents7.7
Stack AI is best for
🤖Automation & Agents7.7
Filter by your use case:
Pros & Cons
Relay.appPros
- User-friendly visual editor makes automation accessible to non-technical users
- Robust 'Human in the Loop' feature ensures critical tasks have human oversight
- Extensive library of 100+ native integrations with popular business apps
- Supports a wide range of AI models (GPT, Claude, Gemini, Mistral, DeepSeek, Groq, Qwen, xAI)
- Offers advanced workflow primitives like dynamic waits and merging paths
- Excellent customer support with fast response times and community options
Cons
- Requires some learning curve for complex workflows despite user-friendly UI
- Advanced features like custom JavaScript require technical understanding
- No explicit mention of mobile applications for on-the-go management
- Pricing scales with usage (steps and AI credits), which can become costly for high-volume tasks
- No explicit mention of an SDK for programmatic agent development
Stack AIPros
- Rapid development of AI agents with no-code/low-code interface
- Comprehensive enterprise-grade security and compliance (SOC 2
- HIPAA
- GDPR)
- Flexible deployment options including on-premise and VPC for data control
- Extensive integration capabilities with 100+ enterprise tools
- Dedicated support from AI experts for enterprise clients
- Significant cost efficiency compared to in-house development
Cons
- Potential complexity for smaller teams without dedicated IT resources
- Higher cost for advanced enterprise features and dedicated support
- Requires integration setup for full automation across existing systems
Weighted Score — Adjust What Matters to You
Pick a profile or drag sliders — scores and radar update instantly on the right.
Quick profiles:
Ease of Use5
Output Quality5
Value for Money5
Customizability5
Support & Ecosystem5
Integration Power5
Dimension Comparison
Relay.app
7.3
/ 10
Your pick
Stack AI
7.2
/ 10
Dimension Breakdown
Ease of Use
AIHow easy it is to get started and use daily
Relay.app
8.0▲ +1.0
Stack AI
7.0
Output Quality
AIQuality and accuracy of generated results
Relay.app
7.0
Stack AI
8.0▲ +1.0
Value for Money
AICost vs. features and output quality
Relay.app
6.0
Stack AI
7.0▲ +1.0
Customizability
CalculatedAbility to tailor to specific needs
Relay.app
7.0▲ +1.0
Stack AI
6.0
Support & Ecosystem
AIDocumentation, community, and support quality
Relay.app
8.0▲ +1.0
Stack AI
7.0
Integration Power
CalculatedAbility to connect with other tools and workflows
Relay.app
8.0
Stack AI
8.0
Calculated = derived from verified integration count and API/open-source signals. AI = LLM-assessed from public website content. Methodology
Task Performance
Relay.app
Task
Stack AI
8.08.0
Workflow Building
7.06.0
Trigger Variety
9.08.0
Action Library
6.07.0
Error Handling
7.05.0
Scheduling Capability
7.07.0
Conditional Logic
8.09.0
Api Connectivity
6.08.0
Monitoring Logging
8.08.0
Multi Step Chains
7.07.0
Autonomous Execution
* Task scores (1–10) are algorithmically generated from publicly available data.
Data is sourced from public information and vendor websites. It may not always be up-to-date — verify pricing and features directly with the vendor before purchasing.Report inaccuracy
Frequently Asked Questions
Which is better, Relay.app or Stack AI?
Both are strong options. Relay.app has a rating of 0.0/5 (0 reviews), while Stack AI has a rating of 0.0/5 (0 reviews). The best choice depends on your specific use case, budget, and workflow requirements.
Is Relay.app cheaper than Stack AI?
Relay.app starts at free (freemium model). Stack AI starts at free (freemium model). Use the Cost Calculator above for a detailed estimate.
What are the main differences between Relay.app and Stack AI?
Relay.app — "Build an AI team that works for you, automating tasks across all your apps.". Stack AI — "From process to AI agent, in minutes. Orchestrate AI agents with enterprise-grade security.". Key differences include their pricing models, platform support, integrations, and technical capabilities. See the Feature Comparison table above for a complete side-by-side breakdown.
Can I use Relay.app and Stack AI together?
Yes, many teams use both tools together for different purposes. Use the Stack Builder section above to combine Relay.app and Stack AI with other tools and save your AI toolkit.
Does Relay.app or Stack AI have a free plan?
Relay.app is available for free. Stack AI is available for free. Always verify current pricing directly with the vendor.