Emissary-ingress
Kubernetes-native Envoy API gateway, formerly Ambassador, now part of Gravitee.
Acquired — still operating
Ambassador Labs acquired by Gravitee in July 2025; the Emissary-ingress open-source project remains actively maintained.
About
Emissary-ingress is an open-source, Kubernetes-native API gateway and Layer 7 load balancer built on Envoy Proxy. It is configured through Kubernetes custom resources, supports authentication, rate limiting, canary releases, circuit breaking, and a subset of the Kubernetes Gateway API, and it is a CNCF incubating project.
It began life as Ambassador, the Envoy-based ingress from Ambassador Labs. In July 2025 Gravitee acquired Ambassador Labs to accelerate its agentic API and event-management platform, folding Edge Stack (the commercial product built on Emissary) and Blackbird into Gravitee's portfolio. The open-source emissary-ingress repository remains actively maintained (commits as of October 2026) under the emissary-ingress GitHub org. For teams it is a solid Envoy-native ingress option, with the caveat that the product roadmap now runs through Gravitee.
What it can do
- Envoy-based L7 load balancing and ingress
- Kubernetes CRD configuration with self-service Mappings
- Authentication and rate-limit services
- Canary releases, circuit breaking, automatic retries
- Kubernetes Gateway API subset support
- Edge Stack commercial distribution via Gravitee
Setup
kubectl apply the Emissary-ingress YAML install, then define Mappings (or Gateway API HTTPRoutes) for your services.
Prerequisites
Kubernetes cluster; kubectl.
Use cases
Works with
Trust score — 7/10
Scored 7/10 (metrics tier, metrics-v1). Evidence: Gravitee acquisition documented in acquisition press; star count and recent commits read from GitHub; CNCF incubation status from the project's own docs. Strengths: mature Envoy-native ingress with real adoption, CNCF incubation, still actively maintained post-acquisition. Docked for: (1) roadmap now controlled by Gravitee, creating uncertainty for the standalone OSS trajectory; (2) thinner independent evidence base than the tier-1 gateways. License: Apache-2.0.
★ 4,521 GitHub stars
How the trust score is built
Full methodology →- Adoption · stars/downloads, log-scaled vs peers
- 7.0/10
- Maintenance · recency, releases, issue load
- 8.0/10
- Openness · license + docs
- 10.0/10
- Manual review · sanity read + red-flag check
- 6.0/10
- · 4,521 GitHub stars on emissary-ingress/emissary (verified via GitHub API)
- · Ambassador Labs acquired by Gravitee July 2025 (acquisition press)
- · Repo actively maintained post-acquisition (pushed Oct 2026)
- · manual review: thinner independent evidence than tier-1 gateways; roadmap now runs through Gravitee
Sources
Every fact above was checked against these sources. Where a claim comes from the provider and couldn't be independently verified, the text says so.