Unleash is an open-source feature management platform for gradual rollouts, kill switches, and A/B testing. Free to self-host; paid plans from $75/seat.
Unleash is a feature management platform that lets engineering teams control which users see which features at runtime, independent of when code is deployed. It is built around feature flags: toggles that can enable, disable, or gradually roll out functionality without a new deployment.
The project began as an open-source tool on GitHub in 2015, created by Norwegian engineer Ivar Osthus. As it gained adoption, Ivar and his brother Egil Osthus formally founded a company around it, legally named Bricks Software AS and trading as Unleash, headquartered in Oslo, Norway in 2019.
Unleash has since raised over 50 million dollars in venture funding, including a Series B round in 2026, and serves large enterprise customers such as Visa, Wayfair, Prudential, and Samsung, while keeping its core server open source.
Unleash provides more than 25 official SDKs covering major programming languages and frameworks, enabling flag evaluation directly inside application code or at the edge for very low latency. Teams can define custom activation strategies, gradual percentage rollouts, and user or segment targeting rules.
Enterprise-focused capabilities include single sign-on via SAML 2.0 and OpenID Connect, role-based access control, four-eyes change request approval workflows, detailed audit logs, and compliance certifications including SOC 2 Type II and GDPR. Data residency and air-gapped or fully self-hosted deployment options are available for regulated industries.
The platform integrates with common developer tools such as Slack, Microsoft Teams, Datadog, and Jira, and includes impact metrics and AI-assisted governance features aimed at helping teams safely manage flags generated by AI coding tools.
The core Unleash server is free and open source, and can be self-hosted with no licensing cost. For teams that want a managed experience, Unleash offers a pay-as-you-go plan starting at 75 dollars per seat per month, with a 5-seat minimum for self-hosted billing and a 14-day free trial requiring no credit card.
The pay-as-you-go plan includes unlimited feature flags, projects, and environments, 25-plus SDKs, SSO, RBAC, and SOC 2 and GDPR compliance, with 53 million API requests per month included on the cloud option. An Enterprise tier offers custom annual contract pricing with unlimited API traffic, premium tiered support, a dedicated customer success manager, and a 99.99 percent uptime commitment.
It is used to manage feature flags so engineering teams can control feature rollouts, run experiments, and roll back problematic changes without redeploying code.
Yes, the core Unleash server is open source and free to self-host, alongside paid cloud and enterprise offerings.
It began as an open-source project by Ivar Osthus in 2015, and he and his brother Egil Osthus founded the company Bricks Software AS, trading as Unleash, in Oslo, Norway in 2019.
The open-source server is free to self-host; the managed pay-as-you-go plan starts at 75 dollars per seat per month, and Enterprise pricing is custom.
It offers more than 25 official SDKs covering major programming languages and frameworks.
Yes, SAML 2.0 and OpenID Connect SSO are included on paid plans.
Unleash differentiates itself with an open-source core and self-hosting options, while LaunchDarkly is a closed-source, cloud-only commercial platform.
The company has raised roughly 51.5 million dollars total, including a 2022 Series A and a 2026 Series B.