vioscaleAI
Comparison

Emissary vs Gloo Gateway

No clear leader: Emissary (51.3) and Gloo Gateway (48.3) are within the 5-point margin; treat as a tie. The attribute-by-attribute breakdown below, with a source and date on every value, is the honest way to compare them.

Emissary full profile →Gloo Gateway full profile →
Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.
Emissary51
Gloo Gateway48
Score
vioscaleAI score
Emissary51 / 100medium · 54%
Gloo Gateway48 / 100low · 32%
Pricing
Free tier
Emissary✓
Gloo Gateway✓
Model
Emissaryopen_source
Gloo Gatewayquote
Price level
Emissaryfree
Gloo Gatewayunknown
Transparent
Emissary✓
Gloo Gateway✗
Integrations
Count
Emissary7
Gloo Gateway9
Security
Certifications
Emissary–
Gloo GatewayFedRAMP
Disclosure policy
Emissary–
Gloo Gateway✓
Fedramp
Emissary–
Gloo Gateway✓
Scorecard
Emissary5.5
Gloo Gateway–
Soc2
Emissary–
Gloo Gateway✓
Trust center
Vulnerabilities
Adoption
Dependent repos
Emissary4
Gloo Gateway–
Github stars
Emissary4,521
Gloo Gateway–
Activity
Commits last 30d
Emissary56
Gloo Gateway–
Release
Cadence days
Emissary18
Gloo Gateway–
History
Emissary20 items
Gloo Gateway–
License
Spdx
EmissaryApache-2.0
Gloo Gateway–
Language
Primary
EmissaryPython
Gloo Gateway–
Market
Availability
EmissaryAvailable worldwide
Gloo Gateway–
Content
Faq
Emissary5 items
Gloo Gateway6 items

Capabilities

Feature-by-feature on the axes that matter for api gateways. “-” means undocumented, not absent.

Deployment
Hosting
EmissarySelf-hosted only
Gloo GatewaySelf-hosted only
Kubernetes-native
Emissary✓
Gloo Gateway✓
Traffic
Rate limiting
Emissary✓
Gloo Gateway-
Request/response transformation
Emissary-
Gloo Gateway✓
Security
OAuth2 / OIDC / JWT
Emissary-
Gloo Gateway✓
Mutual TLS
Emissary✓
Gloo Gateway✓
Protocols
GraphQL gateway
Emissary-
Gloo Gateway✓
gRPC support
Emissary✓
Gloo Gateway✓
Delivery
Developer portal
Emissary-
Gloo Gateway✓
Monetization
Emissary-
Gloo Gateway✓
Ecosystem
Plugin ecosystem
Emissary-
Gloo GatewayLimited
Insight
Observability
Emissary✓
Gloo Gateway✓

What each one is

The product in its own terms, so the numbers below have context.

Emissary

A gateway built on Envoy Proxy that provides Layer 7 load balancing, ingress traffic management with support for multiple protocols including gRPC and HTTP/2, and Kubernetes-native configuration through declarative routing policies.

Independently observed

Gloo Gateway

A cloud-native API gateway built on Envoy that enables organizations to route, transform, and secure API traffic across multiple protocols. It provides enterprise security controls, developer portals for API discovery, and monetization capabilities for managing APIs as revenue-generating assets.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Emissary

Open source
as of verify ↗

Gloo Gateway

HybridFree tier

Free open source forever. Enterprise support available.

  • Open SourceFree
    • Request routing by path, header, method, query parameter, host
    • Kubernetes Gateway API support
    • Traffic splitting and transformation
    • Multi-protocol support: REST, gRPC, GraphQL, WebSocket
    • Active community with regular releases
  • Solo EnterpriseContact sales
    • 24x7 Support SLA with guaranteed response times
    • N-3 Long Term Support with security patches and bug fixes
    • FIPS Compliant Images
    • Private Slack Channel with white-glove support
as of verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platforms
Linux
Emissary–
Gloo Gateway✓
CLI
Emissary–
Gloo Gateway✓
Deployment
Cloud / SaaS
Emissary✓
Gloo Gateway✓
Self-hosted
Emissary✓
Gloo Gateway✓
Hybrid
Emissary✗
Gloo Gateway✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

In common (1)
  • Istio

Emissary

7 total - 6 not shared
  • Consul
  • Linkerd
  • Knative
  • Grafana
  • Prometheus
  • Datadog
Independently observed

Gloo Gateway

13 total - 12 not shared
  • MCP
  • Kubernetes Gateway API
  • Backstage
  • LLMs
  • Kubernetes
  • AWS Lambda
  • AWS EKS
  • AWS API Gateway
  • OpenAPI
  • OAuth 2.0
  • OIDC
  • JWT
Independently observed
Still deciding?

Emissary or Gloo Gateway: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.