Cirrus Labs logo

Cirrus Labs

Developer ToolsVerified70% conf

Creates innovative tools for engineers to enhance productivity in cloud computing

cirrus-ci.org

📍 New York, NY

Verified Data

💰
Est. Revenue$500K-$2M ARR

Based on thousands of developer users, $10/seat pricing, and compute credit sales. Small team size (5-20 employees) suggests revenue in the $500K-$2M range typical for bootstrapped developer tools companies.

🚀
FundingAcquired by OpenAI (April 2026), previously bootstrapped
🔗cirruslabs.org
📊
Monthly Traffic100K-300K monthly visits

~100,000 - 300,000 monthly visits (estimated for cirrus-ci.org).

👥
UsersThousands of developers

Thousands of developers and high-profile open-source repositories (e.g., Flutter, Swift).

🧑‍💻
Team Size5-20 employees
🔗linkedin.com
📈
GrowthStrong adoption in Apple ecosystem, Tart has 5,000+ GitHub stars
🔗github.com
🏷️
StageAcquired by OpenAI (April 2026)
📅
Founded2017

Company Profile

ModelB2B SaaS
VerticalDevOps, iOS/macOS Development, Developer tools
ClientsGoogle (Flutter), Apple (Swift Package Index), MacStadium
BuyersDevOps engineers, iOS/macOS developers, and agentic engineering teams focusing on cloud-native and mobile infrastructure
PricingFree for public repos, Private $10/seat/month, Cloud per-second billing via Compute Credits

Contact

Strategic Analysis

Strategy

Built developer-focused CI/CD tools with strong emphasis on Apple ecosystem and macOS virtualization. Bootstrapped approach targeting niche of iOS/macOS developers underserved by traditional CI providers. Open-source strategy with Tart virtualization tool to drive adoption and community engagement.

Tactics

Open-sourced Tart macOS virtualization tool to build developer mindshare and GitHub presence. Freemium model with public repo support to drive adoption. Per-seat and compute credit pricing to scale with customer usage. Strong GitHub presence and developer community building.

Competitive Positioning

Differentiated from CircleCI, GitHub Actions, and other CI providers by specializing in macOS/iOS builds and virtualization. Positioned as the go-to solution for Apple ecosystem development with native macOS support through Tart. Competed on performance and Apple-specific features rather than broad platform coverage.

Marketing Approach

Developer-led growth through open-source Tart project and GitHub community. Targeted high-profile open-source projects like Flutter and Swift to build credibility. Technical content and documentation-focused approach typical of developer tools companies.

Notable

Acquired by OpenAI in April 2026, YC company, serves high-profile projects like Google Flutter and Apple Swift

🔗 Source ↗

Tech Stack

GoGoRustRustSwiftSwiftKotlinKotlinPythonPythonGoogle Cloud PlatformGoogle Cloud PlatformDockerDockerKubernetesKubernetesmacOS Virtualization
🔗 Source ↗

Recent News

Related Developer Tools Companies

Discovery Sources

Cirrus Labs to join OpenAI
Hacker News Front PageApr 12, 2026

Signals

web traffic100K-300K monthly visits

~100,000 - 300,000 monthly visits (estimated for cirrus-ci.org).

growth rateStrong adoption in Apple ecosystem, Tart has 5,000+ GitHub stars🔗 source ↗
team size5-20 employees🔗 source ↗
user countThousands of developers

Thousands of developers and high-profile open-source repositories (e.g., Flutter, Swift).

funding raisedAcquired by OpenAI (April 2026), previously bootstrapped🔗 source ↗
trend indicatorEngineering Tools🔗 source ↗
trend indicatorCloud Computing🔗 source ↗
trend indicatorSaaS🔗 source ↗

Evidence

cirruslabs.org

We never raised outside capital.

cirruslabs.org

Acquired by OpenAI (April 2026), previously bootstrapped

linkedin.com

5-20 employees

github.com

Strong adoption in Apple ecosystem, Tart has 5,000+ GitHub stars