Relay.app
Voiceflow
| Feature | Relay.app | Voiceflow |
|---|---|---|
| Pricing | Free / from $16/mo | Free / from $50/mo |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.3 / 5 | 4.4 / 5 |
| Best For | operations-teams, agencies, small-businesses, compliance-teams | product-teams, conversation-designers, agencies, enterprise-companies |
| Founded | 2021 | 2019 |
| Workflow Builder | ✓ | ✗ |
| Ai Steps | ✓ | ✗ |
| Human Approvals | ✓ | ✗ |
| Multiplayer Editing | ✓ | ✗ |
| Integrations | ✓ | ✗ |
| Conditional Logic | ✓ | ✗ |
| Visual Designer | ✗ | ✓ |
| Knowledge Base | ✗ | ✓ |
| Api Steps | ✗ | ✓ |
| Variables | ✗ | ✓ |
| Prototyping | ✗ | ✓ |
| Analytics | ✗ | ✓ |
✓ Relay.app Pros
- Human-in-the-loop approvals
- AI steps built in
- Collaborative workflows
- Clean modern interface
✗ Relay.app Cons
- Fewer integrations than Zapier
- Newer platform
- Limited advanced logic
✓ Voiceflow Pros
- Best-in-class visual conversation designer
- Team collaboration built in
- Powerful API step for custom logic
- Knowledge base with RAG support
✗ Voiceflow Cons
- Expensive for solo builders
- Learning curve for advanced features
- Limited built-in channel integrations
The Verdict
Relay.app is built for operations teams and agencies, with a focus on workflow-builder and ai-steps. Voiceflow targets product teams and conversation designers and leads with visual-designer and knowledge-base.
On pricing, Relay.app is the clear winner for budget-conscious users — starting at $16/mo compared to $50/mo for Voiceflow. That $34/mo difference adds up quickly for growing teams.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
Both tools are a solid fit for agencies — in those cases, the decision often comes down to workflow style and how your team prefers to organize work.
This is a genuinely close comparison. If you can, sign up for both free trials (where available) and run a one-week test with your actual team tasks before deciding.