This page provides a high-level summary of releases starting from 2025. It details new functionality, UI changes, deprecations, and important announcements across Unleash and its components.
How to use the tags
Each release note is tagged with the part of the product it applies to. Use the tags to filter for the areas you’re interested in.
- Unleash: The core platform, including the Unleash server, the Admin UI, and overarching product decisions and announcements. See the architecture overview.
- Enterprise Edge: Releases for Unleash Enterprise Edge, a lightweight caching layer that improves the scalability, performance, and resilience of your feature flag infrastructure.
- MCP server: Releases for the Unleash MCP server, which lets AI coding assistants manage feature flags.
- SDKs: Changes that affect the Unleash SDKs, such as naming changes or new capabilities that span multiple SDKs.
A single release note can carry more than one tag when a release touches several areas.
Versioning
Unleash follows semantic versioning, with major versions (for example, v7.0.0) including significant new features and might include breaking changes, and minor versions (for example, v7.4.0) adding new functionality while maintaining backward compatibility.
For a comprehensive list of all Unleash releases, including patch versions and history prior to 2025, visit the Unleash Releases page on GitHub.
The Unleash MCP server, Unleash Enterprise Edge, and each SDK are versioned independently and publish their own changelog in their respective GitHub repositories.
Unleash v8.0.0
If you self-host Unleash, review the v7 to v8 migration guide before you upgrade. No API endpoints were removed, but several deprecated schema properties have been.
Announcement: Unleash open source moves to AGPLv3
Starting with Unleash v8, the source code in the primary Unleash GitHub repository and the unleash-server npm package move from the Apache 2.0 license to the GNU Affero General Public License v3 (AGPLv3).
Most users are unaffected:
- Official open-source Docker images remain under Apache 2.0. Running a pre-built Unleash container without modifying the source is unaffected.
- Unleash SDKs keep their current permissive licenses, so your application code is unaffected.
- Unleash Enterprise and Unleash Cloud are unaffected. Your deployment, terms, and obligations are unchanged.
The change applies if you modify the Unleash source and make it available to users over a network, for example as a public or commercial SaaS. In that case, AGPLv3 requires you to make your modified source available under the same license, or to contact us for a commercial license. For the full reasoning and a use-case breakdown, see Evolving our open source commitment.
Automated release management now generally available
Release templates, impact metrics, safeguards, and milestone progression are now generally available.
Impact metrics are application-level time series, such as counters, gauges, and histograms for error rates, latency, and adoption. They can be recorded by Unleash SDKs or queried from an existing Prometheus or VictoriaMetrics instance. Safeguards let you set thresholds on those metrics that automatically pause a rollout or disable an environment when a metric crosses the limit. Milestone progression advances a release template to its next milestone when the metrics stay healthy for a configured interval, removing the need to step rollouts forward manually.
Remote MCP server now generally available
The remote Unleash MCP server is now generally available. It lets you connect MCP clients to a server hosted by your Unleash instance, without installing anything locally. Use it when developers cannot run MCP servers on their machines, or when you want to manage MCP access centrally.
Streaming between Unleash and Edge in beta
Unleash Edge can now receive flag updates from Unleash as a real-time stream instead of polling. Flag changes propagate to your Edge nodes, and to your applications, in milliseconds. Streaming is available on both managed and self-hosted Enterprise Edge.
Improved project onboarding
We’ve further improved the project onboarding experience. The project page now shows a three-step Project setup checklist that tracks creating a feature flag, connecting one or more SDKs, and sending flag evaluation metrics back to Unleash. On the flag page, a contextual banner points you to the next step based on your current setup state. SDK setup now also works for any SDK you add to a project, not only the first one.
Redesigned access overview
The access overview page is redesigned to give admins and individual users a clearer view of a user’s instance and project access in one place.
New sunset flag type
We introduced a new sunset flag type to help you coordinate the planned removal of an existing feature. Use it to wrap a feature you plan to retire, so you can gradually disable it for selected user segments while monitoring the impact, and pause or re-enable the rollout if downstream issues surface.