GO Feature Flag vs Unleash
GO Feature Flag
gofeatureflag.orgUnleash
getunleash.ioSide by side
| Figure | GO Feature Flag | Unleash |
|---|---|---|
| Price from | Free | $6.25/mo |
| Free plan | Yes | Yes |
| Free trial | — | Yes |
| Open source | — | Yes |
| Web | Yes | Yes |
| Windows | Yes | Yes |
| macOS | Yes | Yes |
| Linux | Yes | Yes |
| iOS | Yes | Yes |
| Android | Yes | Yes |
| API | Yes | Yes |
| Self-hosted | Yes | Yes |
| Plans published | 2 | 7 |
| Spec score · Feature Flag Software | 7.8 (#17) | 8.7 (#8) |
| Deployment | The relay proxy can be started locally with a Docker command and uses a flag configuration file. | Unleash Enterprise is offered as hosted cloud, self-hosted, or hybrid, with a hosted private instance available as an Enterprise add-on. |
| License | The project is 100% open source under the MIT license, and the site says the license permits commercial use. | The main source repository uses AGPLv3 from version 8 onward; earlier source versions used Apache 2.0 and official open-source Docker images remain Apache 2.0. |
| SDKs | The site lists client and server SDKs for 16 languages and frameworks, including JavaScript, React, Swift, Kotlin, Go, Java, Python, .NET, Ruby, and Rust. | Unleash lists 25+ SDKs for languages and frameworks including Node.js, Java, Go, Python, .NET, React, Android, and iOS. |
| Support | Community support is included with the free plan; paid enterprise support includes premium support and an SLA on CVE fixes. | Pay-As-You-Go includes standard support with a one-business-day response target; Custom Enterprise offers standard or premium support and severity-based response times. |
Plans
Unleash
- Open SourceFree
- Unleash Open SourceFree
- Cloud-hosted Pay-as-you-go$75 a month
- Pay-As-You-Go$75 a month
- Self-hosted Pay-as-you-go$75 a year
- Custom EnterprisePriced on request
- Enterprise customPriced on request
In their own words
GO Feature Flag
GO Feature Flag is an open-source feature-flag management system built on OpenFeature for infrastructure you control. Its relay proxy runs locally with Docker and a flag configuration file. Teams can target users and segments, use percentage or progressive rollouts, schedule changes, and run A/B tests. Client and server SDKs are listed for 16 languages and frameworks, including JavaScript, TypeScript, React, Swift, Kotlin, Go, Java, Python,.NET, Ruby, Rust, and others. Retrievers load configuration from HTTP(S), local files, Kubernetes ConfigMaps, cloud storage, Git providers, MongoDB, Redis, and PostgreSQL. Exporters send evaluation data to Kafka, AWS S3, BigQuery, OpenTelemetry, webhooks, or logs. Notifications can reach Slack, Discord, Microsoft Teams, webhooks, or logs. The MIT-licensed Opensource plan costs nothing, billed forever, with all features, unlimited flags, and community support.
Unleash
Unleash is a feature management platform for controlling software behavior and releases in production without redeploying code. Teams can stage progressive rollouts, roll back instantly, apply release templates, and use kill switches. Its experimentation tools include A/B/n testing, flag variants, user segmentation, and stickiness. Flags are evaluated in SDKs or at the edge rather than on the Unleash server. The service lists more than 25 SDKs, including options for Node.js, Java, Go, Python,.NET, React, Android, and iOS. Listed integrations include Slack, Teams, Datadog, Jira, webhooks, and Admin, Frontend, and Client APIs. The free Open Source instance allows no seat limit but is restricted to one project, two environments, and 5,000 flags; it lacks SSO, SCIM, granular RBAC, change-request approvals, and a support SLA. Pay-As-You-Go costs $75 a month, billed monthly, and has a 14-day trial without a credit card. Enterprise can be hosted, self-hosted, or hybrid, with US or EU data residency available.