Kong
Signal
| Feature | Kong | Signal |
|---|---|---|
| Pricing | Free / from $0.05/mo | Free only |
| Free Plan | ✓ Yes | ✓ Yes |
| Rating | 4.3 / 5 | 4.6 / 5 |
| Best For | platform-engineers, microservices-teams, api-gateway-users, devops-teams | privacy-advocates, journalists, activists, security-conscious-users |
| Founded | 2010 | 2014 |
| Api Gateway | ✓ | ✗ |
| Service Mesh | ✓ | ✗ |
| Load Balancing | ✓ | ✗ |
| Authentication | ✓ | ✗ |
| Rate Limiting | ✓ | ✗ |
| Plugins | ✓ | ✗ |
| Observability | ✓ | ✗ |
| Kubernetes Ingress | ✓ | ✗ |
| End To End Encryption | ✗ | ✓ |
| Group Chats | ✗ | ✓ |
| Voice Calls | ✗ | ✓ |
| Video Calls | ✗ | ✓ |
| Disappearing Messages | ✗ | ✓ |
| Screen Security | ✗ | ✓ |
✓ Kong Pros
- Open-source core with large plugin ecosystem
- Sub-millisecond latency for API requests
- Platform-agnostic deployment (cloud, on-prem, hybrid)
- Strong Kubernetes-native support
✗ Kong Cons
- Enterprise features require paid license
- Configuration complexity for advanced setups
- Documentation could be more beginner-friendly
✓ Signal Pros
- Industry-leading encryption
- Completely free and open-source
- No ads or data collection
- Cross-platform support
✗ Signal Cons
- Smaller user base than WhatsApp
- Limited business features
- No channels or bots
The Verdict
Kong is built for platform engineers and microservices teams, with a focus on api-gateway and service-mesh. Signal targets privacy advocates and journalists and leads with end-to-end-encryption and group-chats.
Signal uses custom enterprise pricing, while Kong starts at $0.05/mo — a tangible advantage for teams with a fixed budget.
Both offer free plans, so you can test each with your real workflow before committing to a subscription.
Feature-wise, Kong offers broader built-in capabilities (8 features vs 6), while Signal takes a more focused approach — which can mean a simpler, faster onboarding experience.
Bottom line: Signal has a slight overall edge — but if open-source core with large plugin ecosystem matters most to you, Kong may still be the right call.