Semaphore
NewThe CI built for coding agents: fast, affordable, and enterprise-ready.
#14 of 45 in CI/CD1,000 customers (per semaphore.io)40% positive in AI answers
Data collected ·ChatGPT, Perplexity, Google AI Mode·coverage 100%·next run
- Semaphore ranks #14 of 45 in CI/CD with an AI visibility score of 6.4 (SlateIndex, Nov 3, 2026).
- Semaphore is most visible on Google AI Mode (8.2) and least on ChatGPT (3.9).
- AI engines name Semaphore in 10 of the 30 CI/CD buyer prompts SlateIndex tracks.
- semaphore.io is the source AI engines cite most in answers about Semaphore, with 10 citations.
About
Company details for Semaphore
Semaphore is a CI/CD platform for building, testing and deploying software, with pipelines, deployments and automation, self-hosted agents, and a public API. Its core is open source under the Apache 2.0 license and can be used as a hosted service or self-run. The vendor also positions it as a CI system that coding agents can set up and operate. It ranks #14 of 45 in CI/CD on SlateIndex and has a visibility score of 6.4 in the latest weekly run.
Founded in 2009 and headquartered in Novi Sad, Serbia, the company employs 11–50 people. Its differentiator: an open-source core under Apache 2.0 that you can self-host, with pay-as-you-go pricing and no per-seat fees.
- Website
- semaphore.io
- Categories
- CI/CD
- Company size
- 11–50 employees
- Headquarters
- Novi Sad, Serbia
- Founded
- 2009
- Company type
- Private company
- Funding
- PE round, Cypress Ridge Capital
- Customers
- 1,000 · per semaphore.io/about
- Pricing
- Free; paid from $0.003 / mo · usage-based
- Free trial
- Free plan available
- Deployment
- Open source, cloud, hybrid or enterprise deployment
- Platforms
- Ubuntu x64, Ubuntu ARM, macOS
- Compliance
- SOC 2 Type 2, ISO 27001:2022
- Support
- Free help with account setup, projects and Git integration, Paid Basic, Priority Response, SLA Standard and SLA Premium support plans, On-demand engineering access in blocks of hours
Read from linkedin.com, semaphore.io, g2.com, facebook.com, semaphoreio.substack.com, tracxn.com · refreshed Nov 3, 2026.
AI visibility
Latest weekly run · Nov 3 · next run Nov 9
Visibility score trend
Weekly runs over the last 60 days, with up to 7 competitors. Click a name to hide or show its line.
Changes appear after the second weekly run in CI/CD. GitHub leads the category at 83.3%.
Media
Website and product screenshots for Semaphore
AI mentions & citations
Recent answers that name Semaphore
Which CI/CD tool has the best reviews?
Semaphore has the highest review rating among commonly reviewed CI/CD tools found: 4.7/5 on G2, based on 198 reviews.
Which CI/CD tool has transparent pricing?
Semaphore CI: Explicitly restructured its pricing model to separate compute infrastructure from support/success services, specifically targeting predictable usage and transparent infrastructure consumption.
Alternatives to the most popular CI/CD tool
While it offers low-friction integration for repositories living on GitHub, many teams look for alternatives due to scaling costs, complex matrix requirements, security track records , or a desire for self-hosted…
Which CI/CD tools offer annual discounts?
Best for negotiating a discount: Semaphore — annual discounts are available, but the amount isn't published.
Most affordable CI/CD tool that is still reliable
Which CI/CD tool offers a free trial?
Semaphore : Offers a free enterprise tier for smaller teams and startups with ARR under $5M, granting full functionality with no time limit rather than a temporary trial.[](https://semaphore.io/blog/enterprise-ci-cd-…
Which CI/CD tools offer annual discounts?
Note: Pure consumption-based or pay-as-you-go tools (like Buildkite, Bitbucket Pipelines, or Semaphore) typically charge strictly based on metered build minutes or active concurrent agents rather than offering flat…
What are the best CI/CD tools in 2026?
Need high-performance managed CI: Evaluate CircleCI, Buildkite, or Semaphore.
Products & features
What Semaphore sells
Continuous Integration and Pipelines
Visual workflow builder, auto-generated config as code, build optimization and self-hosted agents.
Deployments and Automation
Promotions, deployment targets, deployment orchestration and infrastructure tasks.
API
Public OAS 3.0 API for managing resources and integrating Semaphore with other tools.
sem-ai
Open-source agent-first interface that lets coding agents run and manage CI.
Strengths engines cite
- predictable, transparent usage pricing
- free full-functionality enterprise tier for small teams and startups
- highest G2 review rating among CI/CD tools (4.7/5)
- low-friction integration for GitHub repositories
Target market & buyers
SMBs, startups and Fortune 500 companies.
Notable customers include Confluent, Simply Business, CleverTap, Lawmatics, Split Payments, Optimal Workshop, Tigera, GoCo.
| Industry | Primary use case |
|---|---|
| Mobile apps | iOS and Android builds |
| Containerized applications | Docker and Kubernetes pipelines |
Funding & recent developments
Funding
| Round | Year | Amount |
|---|---|---|
| PE round, Cypress Ridge Capital lead | 2023 | — |
| PE round, Cypress Ridge Capital | 2025 | — |
| Latest known round | Total raised |
|---|---|
| PE round, Cypress Ridge Capital | — |
Recent developments
- Oct 2026ProductSemaphore Open Source 1.6 adds MCP server
Open source 1.6 added an MCP server, sem-ai out of the box, and partial job reruns.
- Sep 2026Productsem-ai released as open source
Semaphore released sem-ai, an agent-first interface, as an open-source project.
- Jun 2026ProductFlaky Test API generally available
The Flaky Test API became generally available, alongside a new auto-fix skill.
- May 2026ProductSemaphore for AI Agents launched
Semaphore launched an open-source CLI and agent interface for AI agents.
- Mar 2026ProductNew pricing model separates compute from support
Pricing now separates compute from support and success services, with the fastest runners from $0.0075 per minute.
Competitive landscape
How Semaphore compares with its top three alternatives
Semaphore most often appears alongside GitHub, GitLab, Jenkins in AI answers.
What AI answers say
Sentiment and themes from the answers that mention this brand
Positive 40% · Neutral 60% · Mixed 0% of 10 engine answers that mention Semaphore
Praised for
- predictable, transparent usage pricing
- free full-functionality enterprise tier for small teams and startups
- highest G2 review rating among CI/CD tools (4.7/5)
- low-friction integration for GitHub repositories
Criticised for
- scaling costs
- complex matrix requirements
- security track record concerns
Pricing
Usage-based pricing with a free plan
Cite as: SlateIndex, “Semaphore AI visibility profile”, https://slateindex.ai/brand/semaphore, data of Nov 3, 2026. Licence: CC BY 4.0.