My goal is to host our source code in private repos. What's the best source code hosting platform with the best CI/CD integration?

When it comes to hosting private repositories with world-class CI/CD integration, the industry is led by two titans: GitHub and GitLab . A third option, Bitbucket , remains relevant primarily if you are heavily embedded in the Atlassian (Jira/Confluence) ecosystem.

The "best" choice depends on whether you prioritize extensibility and community ecosystem (GitHub) or an all-in-one native DevSecOps experience (GitLab).

1. GitHub (Best for Ecosystem & Flexibility)

GitHub features GitHub Actions , which has grown to be one of the most dominant and flexible CI/CD engines on the market.

• Private Repositories: Generates free private repository minutes/storage on standard tiers, scaling up with enterprise plans.
• CI/CD Integration (GitHub Actions): Tightly integrated right into your repo view. Its superpower is the GitHub Marketplace , boasting tens of thousands of community-built and official actions. If you need to connect to AWS, deploy to Vercel, or run a specialized linter, there is almost always a pre-built action ready to plug in with a few lines of YAML.
• Pros: Massive community, unmatched third-party integrations, highly explicit dependency graphs for complex workflows, and a very familiar interface for most developers.
• Cons: Advanced security features (like native SAST, secret scanning, and dependency vulnerability insights) often require third-party actions or upgrading to GitHub Advanced Security (GHAS).

2. GitLab (Best for Out-of-the-Box DevSecOps)

GitLab was built from the ground up as a single application for the entire software development lifecycle, making its CI/CD engine (GitLab CI/CD ) a first-class citizen.

• Private Repositories: Offers robust private repo controls and granular permission management on both SaaS and self-managed options.
• CI/CD Integration: Unlike GitHub (which relies on assembling pieces from a marketplace), GitLab provides native security scanning (SAST, DAST, container scanning), license compliance, and package registries built directly into the platform. Enabling a security scan often just takes a single include line in your .gitlab-ci.yml.
• Pros: True "single pane of glass", phenomenal Kubernetes integration (autoscaling runners natively via clusters), excellent compliance and audit features for regulated industries.
• Cons: Can feel heavier or more complex ("Swiss Army knife" syndrome) compared to GitHub's lighter, modular approach.

3. Bitbucket (Best for Atlassian-Centric Teams)

• Bitbucket Pipelines integrates smoothly if your team already uses Jira for issue tracking and Confluence for documentation.
• It is a solid, cost-effective choice for private Git repos, but its CI/CD community ecosystem and advanced deployment tracking do not match the sheer velocity and feature depth of GitHub Actions or GitLab CI.

Summary Recommendation

• Choose GitHub if you want maximum flexibility, want to leverage an enormous marketplace of third-party plugins, and prefer a modular toolchain.
• Choose GitLab if you want comprehensive, zero-setup security scanning, compliance tracking, and powerful native CI/CD pipelines right out of the box without hunting for external integrations.

To help narrow this down, tell me:

• Do you plan on cloud-hosting (SaaS) or self-hosting the platform?
• Do you have existing tools (like Jira, AWS, or specific security scanners ) that you need deeply integrated?

If your priority is private source-code hosting + excellent CI/CD integration, my default recommendation is GitHub + GitHub Actions.

My ranking

1. GitHub — best overall

github.com is what I'd choose for most teams.

Why:

• Unlimited private repositories are available, including on the free plan.
• GitHub Actions is tightly integrated with repositories, pull requests, branches, releases, secrets, environments, and deployments.
• Huge ecosystem of reusable Actions and integrations.
• Hosted runners for Linux, Windows, macOS, ARM, containers, and more, plus self-hosted runners.
• Excellent developer experience around pull requests and code review.
• GitHub Packages gives you an integrated package/container registry.
• Strong security tooling, including Dependabot and optional Advanced Security.
• If you eventually want AI-assisted development, GitHub's Copilot ecosystem is another advantage.

The main downside is CI/CD cost at scale: private repositories get an included Actions allowance, after which usage is billed. GitHub has also changed Actions pricing in 2026, so I'd model your expected build minutes before committing to a large deployment footprint.

2. GitLab — best if CI/CD is the centerpiece

gitlab.com is arguably the strongest alternative.

GitLab's philosophy is essentially "the entire DevSecOps platform in one place." Its CI/CD is native rather than something bolted onto the source-control product. Pipelines are defined in .gitlab-ci.yml and can automatically build, test, deploy, and run on merge requests, pushes, schedules, etc.

I'd favor GitLab over GitHub if you want:

• Sophisticated multi-stage pipelines
• DevSecOps/security scanning integrated into the platform
• Built-in deployment/release management
• Self-managed GitLab
• Fewer separate products in your development toolchain

3. Bitbucket — excellent with Jira

bitbucket.org becomes particularly compelling if your organization already uses Jira and Confluence.

Bitbucket Pipelines is built directly into Bitbucket Cloud, with deployment environments, governance features, and a large collection of integrations called Pipes.

The killer feature is the Atlassian integration: code, pull requests, builds, deployments, Jira issues, and change management fit together very naturally.

What I'd choose

For a typical software company: → GitHub + GitHub Actions

For a company wanting an all-in-one DevSecOps platform: → GitLab

If you're already deeply invested in Jira/Confluence: → Bitbucket + Pipelines

If you're an enterprise heavily committed to Azure/Microsoft: → Azure DevOps

One important distinction: source-code hosting and CI/CD don't necessarily need to come from the same vendor. For example, GitHub + self-hosted runners, GitHub + AWS CodeBuild, or GitLab + Kubernetes can be excellent architectures.

If you tell me your team size, cloud (AWS/Azure/GCP/on-prem), languages, and roughly how many builds/deployments you expect per day, I can give you a much more specific recommendation—including estimated monthly cost and the CI/CD architecture I'd use.

When it comes to hosting private repositories with world-class CI/CD integration, the industry generally narrows down to two main titans, with a third niche contender depending on your existing tech stack.

The best options compared by their strengths in private code hosting and CI/CD include:

• GitLab (Best True All-in-One DevSecOps Platform):
  • Why it wins for CI/CD: GitLab CI/CD is built natively into the platform rather than bolted on. It offers robust, incredibly flexible pipeline features, auto-scaling runners (including great Kubernetes integration), and built-in security scans (SAST, DAST, dependency scanning) right out of the box.
  • Private Repos: Offers generous private repository support on both its cloud tier and via its market-leading self-hosted/on-premise edition.
• GitHub (Best Ecosystem and Marketplace):
  • Why it wins for CI/CD: GitHub Actions is massively popular due to its seamless context inside GitHub repositories and the GitHub Marketplace , which features tens of thousands of ready-to-use, community-built actions. If you want plug-and-play integrations for third-party tools, GitHub is unmatched.
  • Private Repos: Excellent private repository handling, robust permissions, and keyless cloud deployments via OIDC.
• Bitbucket (Best for Atlassian-Centric Teams):
  • Why it wins for CI/CD: Bitbucket Pipelines offers native CI/CD that tightly integrates with the rest of the Atlassian suite.
  • Private Repos: Ideal if your organization heavily relies on Jira and Confluence for issue tracking and project management, providing smooth branch-to-issue traceability.

The Verdict

• Choose GitLab if you want the most seamless, powerful, and secure out-of-the-box CI/CD pipeline capabilities without needing external plugins or actions.
• Choose GitHub if your team prioritizes a massive community ecosystem , an extensive marketplace of pre-built automation actions, and a lighter learning curve.

To help narrow down the exact right fit, tell me:

• Do you prefer a cloud-hosted service (SaaS) or do you need to self-host on your own infrastructure?
• What languages, frameworks, or cloud providers (AWS, GCP, Azure) are part of your core stack?

If your priorities are private repositories + excellent CI/CD integration, my default recommendation is GitHub + GitHub Actions.

github.com has the best overall combination of developer experience, ecosystem, integrations, and CI/CD flexibility. GitHub Actions is built into the platform, supports self-hosted runners, reusable workflows, environments/secrets, deployment gates, and a huge ecosystem of reusable actions. Private repositories are fully supported.

My ranking

🥇 GitHub + Actions — my recommendation

Choose this if you want the least friction for a modern development team.

The big advantage is the ecosystem. You can easily integrate AWS, Azure, GCP, Kubernetes, Terraform, Docker, Slack, security scanners, package registries, deployment platforms, etc. GitHub also lets you keep reusable Actions/workflows in private repositories and share them across your organization.

For example, your workflow can be:

Private GitHub repo → PR → Actions → tests → security checks → build Docker image → deploy staging → approval → production

You can also use self-hosted runners if builds need access to your internal network or you don't want workloads running on GitHub-hosted infrastructure.

🥈 GitLab — arguably better if CI/CD is the primary consideration

about.gitlab.com is probably the strongest alternative.

GitLab's philosophy is more "everything is DevOps in one platform." Its CI/CD system is extremely deeply integrated rather than being a separate automation layer. It also has particularly strong built-in DevSecOps functionality and self-hosting options. Private projects are first-class citizens.

I'd choose GitLab over GitHub if you specifically want:

• CI/CD tightly integrated with the repository
• Built-in DevSecOps/security tooling
• Sophisticated pipeline orchestration
• A platform you can potentially self-host
• Fewer separate DevOps products to stitch together

An interesting option is even GitHub for source control + GitLab CI/CD; GitLab officially supports running its CI/CD against GitHub repositories.

🥉 Bitbucket

bitbucket.org makes the most sense if your organization already lives in Jira/Confluence/Atlassian.

Its repository → PR → Jira issue → deployment workflow is excellent. But if Jira isn't already central to your workflow, I'd generally pick GitHub or GitLab instead.

What I'd pick

For a typical company starting fresh:

GitHub + GitHub Actions + Docker + Terraform + cloud deployment

That's the stack I'd recommend unless you have a specific requirement for self-hosting, stringent data sovereignty, or an existing Atlassian/Microsoft ecosystem.

If you tell me team size, cloud (AWS/Azure/GCP/on-prem), language/stack, and whether you need self-hosted runners, I can narrow this down to the best platform and plan for your situation.

about.gitlab.com is probably the strongest alternative.

GitLab's philosophy is more "everything is DevOps in one platform." Its CI/CD system is extremely deeply integrated rather than being a separate automation layer. It also has particularly strong built-in DevSecOps functionality and self-hosting options. Private projects are first-class citizens.

When hosting private source code and looking for the best integrated CI/CD, the market boils down to two dominant titans: GitHub (with GitHub Actions) and GitLab (with GitLab CI/CD). A third option, Bitbucket (with Bitbucket Pipelines), remains relevant primarily for teams deeply embedded in the Atlassian/Jira ecosystem.

The "best" platform depends entirely on whether you want an all-in-one unified DevSecOps platform or an extensible ecosystem with the largest community and marketplace.

1. GitHub (with GitHub Actions)

• Best For: Developer experience, ecosystem size, and community-driven workflows.
• CI/CD Integration: GitHub Actions is deeply integrated directly into your repositories . Because of its massive popularity, it has the largest community marketplace with over 20,000 pre-built actions for connecting to third-party services, deploying to cloud providers, or running linters.
• Private Repo Support: Offers unlimited private repositories on both free and paid plans, with a standard monthly allowance of free private CI/CD minutes (typically 2,000 minutes/month on free tiers).
• Key Strengths:
  • Unmatched ecosystem and ease of finding community-made plugins/actions.
  • Native, seamless AI integration through tools like GitHub Copilot.
  • Excellent cloud-native OIDC (OpenID Connect) authentication for keyless cloud deployments.
• Downside: Advanced security scans (SAST, secret protection) for private code often require separate add-ons or higher-tier enterprise seats . True on-premises self-hosting requires a paid GitHub Enterprise Server license.

2. GitLab (with GitLab CI/CD)

• Best For: All-in-one compliance, security, and true self-hosted private infrastructure.
• CI/CD Integration: GitLab CI/CD is a first-class citizen built directly into the core architecture . Rather than relying on a marketplace of external actions, everything—from SAST security scanning and container registries to package repositories—is native and enabled via a single configuration file (.gitlab-ci.yml).
• Private Repo Support: Offers unlimited private repositories . The free tier includes a baseline of monthly CI minutes (400 minutes), but self-managed instances have no compute minute limits if you supply your own runners.
• Key Strengths:
  • Complete "single pane of glass" DevSecOps platform; security scanning, compliance dashboards, and issue tracking are built right in.
  • Superior self-hosting: GitLab Community Edition (CE) is fully open-source, feature-complete, and free to host completely on-premise or in air-gapped environments.
  • Powerful Kubernetes integration via GitLab Runners that spin up dynamic pods effortlessly.
• Downside: Steeper learning curve due to the sheer volume of built-in features, and the interface can feel heavier compared to GitHub's streamlined design.

3. Bitbucket (with Bitbucket Pipelines)

• Best For: Teams already standardizing on Atlassian (Jira, Confluence).
• CI/CD Integration: Bitbucket Pipelines runs right inside Bitbucket Cloud, providing a unified view of your builds next to your source code.
• Private Repo Support: Generous free tier for small teams (up to 5 users) with private repositories and integrated pipeline minutes included.
• Key Strengths:
  • Unbeatable Jira and Trello issue-tracking integration (branch names auto-link to Jira tickets, builds update statuses natively).
  • Competitive pricing seat-for-seat compared to GitHub or GitLab enterprise options.
• Downside: Smaller community, fewer third-party integrations, and less momentum in the broader modern DevOps space than GitHub or GitLab.

Quick Recommendation

• Choose GitHub Actions if your team wants the smoothest developer experience, values a massive community marketplace, and plans to stay entirely in the public cloud.
• Choose GitLab CI/CD if you need robust, out-of-the-box security auditing/compliance tools, or if you need to strictly self-host your private code and pipelines on your own internal servers.
• Choose Bitbucket only if your entire organizational workflow is permanently anchored around Jira and Confluence.

To help narrow this down, tell me:

• Do you prefer a cloud-hosted SaaS or a self-hosted/on-premise setup?
• Are you already using specific tools like Jira, Kubernetes, or AWS/GCP/Azure for your infrastructure?

If your priorities are private repositories + excellent CI/CD + a good developer experience, my default recommendation is GitHub + GitHub Actions.

My ranking

🥇 GitHub + GitHub Actions — best overall

GitHub is what I'd choose for most teams.

GitHub gives you private repositories, pull requests, code review, security tooling, packages, and GitHub Actions directly in the repository. Actions supports Linux, Windows, macOS, ARM, containers, self-hosted runners, matrix builds, secrets, and deployment workflows.

The big advantage is ecosystem: practically every cloud provider, deployment platform, security scanner, container registry, and developer tool has a GitHub integration.

I'd pick this unless you have a reason not to.

One caveat: GitHub Actions for private repositories has included monthly minutes depending on your plan, with additional usage billed after the allowance.

🥈 GitLab — best if CI/CD is the centerpiece

GitLab is arguably the strongest all-in-one DevOps alternative.

Its CI/CD is deeply integrated rather than feeling like a separate automation product. If you want source control → CI → security scanning → packages → deployments → environments all under one umbrella, GitLab is extremely compelling.

I'd lean toward GitLab over GitHub if your organization is particularly DevOps/pipeline-centric or you want the option of self-managed infrastructure. GitLab CI/CD can also work with external GitHub or Bitbucket repositories, although that adds complexity.

🥉 Azure DevOps — excellent for Microsoft shops

Azure DevOps is a very strong choice if you're using Azure, .NET, Microsoft Entra ID, or the broader Microsoft ecosystem.

Azure Repos provides private Git repositories, while Azure Pipelines handles CI/CD across Linux, Windows, macOS, containers, Kubernetes, and different clouds.

You can also keep your source on GitHub and use Azure Pipelines, so you don't necessarily have to choose one ecosystem wholesale.

Bitbucket — great if Jira is already central

Bitbucket makes the most sense when your team already lives in Jira + Confluence.

Bitbucket Pipelines is built directly into Bitbucket Cloud, and Atlassian provides integrations for deployment, monitoring, security, Jira workflows, and more.

I wouldn't choose it solely for CI/CD, though. GitHub and GitLab generally give you a stronger overall developer ecosystem.

What I'd choose

For a new organization:

GitHub → GitHub Actions → cloud/container registry → automated deployment

For example:

GitHub
   │
   ├── Pull Request
   │      ├── lint
   │      ├── unit tests
   │      ├── security scanning
   │      └── build
   │
   └── merge to main
          │
          ├── build Docker image
          ├── push to registry
          ├── deploy staging
          ├── integration tests
          └── approve → production

That gives you a very clean setup without having to operate a separate CI server.

Bottom line: I'd go with GitHub + GitHub Actions for the best combination of private source hosting, CI/CD, integrations, ecosystem, and developer experience. GitLab would be my second choice if you want a more deeply integrated DevOps platform.

If your priorities are private repositories + excellent CI/CD + low operational friction, my top pick is GitHub + GitHub Actions.

My ranking

🥇 GitHub + GitHub Actions — my recommendation

GitHub is probably the strongest default choice today. GitHub Actions is tightly integrated with repositories, pull requests, branch protection, secrets, releases, packages, and deployments. It supports GitHub-hosted runners across Linux, Windows, macOS, ARM, and other configurations, while also allowing self-hosted runners.

The big advantage is the ecosystem. There are enormous numbers of prebuilt Actions for AWS, Azure, GCP, Docker, Kubernetes, Terraform, security scanning, publishing packages, and virtually every mainstream development stack.

A typical setup can be:

Private GitHub repo → PR → Actions runs tests → merge → build container → security scan → deploy staging → approval → production

That's a very clean developer experience.

🥈 GitLab — best if you want "everything in one place"

GitLab is arguably the better integrated DevOps product. A GitLab project combines the repository, collaboration/project-management features, and CI/CD rather than treating CI/CD as a separate product. Private projects are supported without a limit on the number of private projects.

GitLab's CI/CD is particularly good if you expect sophisticated pipelines. It has hosted runners, self-managed runners, reusable CI/CD components, protected environments, deployment controls, etc.

I'd choose GitLab over GitHub if your organization says:

"We want our source control, CI/CD, DevSecOps, deployments, and project tooling to be one integrated platform."

🥉 Azure DevOps

Azure DevOps is excellent if you're heavily invested in Azure, Microsoft Entra ID, .NET, Visual Studio, or Microsoft enterprise tooling.

Azure Repos + Azure Pipelines gives you a very mature private-code/CI/CD combination. Azure Pipelines also supports GitHub, Bitbucket, and multiple repositories, so you're not locked into Azure Repos.

For private projects, Azure Pipelines currently includes a free tier of one parallel job for up to 1,800 minutes/month once billing is configured.

What I'd choose

For a new organization:
→ GitHub + GitHub Actions

For a company wanting an all-in-one DevOps platform:
→ GitLab

For a Microsoft/Azure shop:
→ Azure DevOps

One important distinction: don't choose solely based on where the repository lives. If you already know your deployment target (AWS, Azure, GCP, Kubernetes, on-prem, etc.), that can change the recommendation because the quality of the CI/CD integration with your deployment environment matters enormously.

If you tell me your cloud/deployment target, team size, language/stack, and whether you need self-hosted runners, I can give you a much more specific recommendation—including GitHub vs GitLab vs Azure DevOps pricing and CI/CD architecture.

When looking to host private repositories with top-tier CI/CD integration, the industry generally boils down to a head-to-head match between GitHub and GitLab . Both offer unlimited private repos on their lower/free tiers, but their philosophy and CI/CD integrations differ.

The best choice depends on whether you prefer an extensible ecosystem or an all-in-one platform.

1. GitHub (Best for Ecosystem & Flexibility)

• The Hosting Platform: GitHub is the undisputed industry standard . Nearly every developer tool, cloud provider, and third-party service builds its primary integration for GitHub first . Private repositories are free for teams, and the overall interface is smooth and familiar.
• The CI/CD (GitHub Actions): GitHub Actions is deeply integrated into the repository layer . Its superpower is the GitHub Marketplace , which features over 20,000 community-built, reusable actions . Need to authenticate with AWS, lint code, or send a Slack alert? You rarely write custom scripts; you just drop in an existing action.
• Pros: Unmatched third-party integrations, massive community support , smooth YAML syntax with explicit dependency graphs , and top-tier AI integration via GitHub Copilot.
• Cons: Security scanning (like SAST/DAST) or advanced compliance features often require stitching together multiple third-party marketplace actions rather than having a single cohesive dashboard.

2. GitLab (Best for Built-In, End-to-End DevSecOps)

• The Hosting Platform: GitLab operates on an "all-in-one factory" mindset . Instead of relying on a marketplace of third-party extensions, GitLab aims to provide everything natively—from source control and issue boards to container registries and monitoring . It is also exceptionally friendly if you need to self-host your private code.
• The CI/CD (GitLab CI/CD): GitLab CI is widely praised for heavy-duty pipelines . Because security scanners, container registries, and deployment environments are native first-class citizens, you can enable comprehensive SAST, dependency scanning, and compliance tracking with a single line of configuration (include:). Its Kubernetes integration is also cleaner for spinning up dynamic review apps and autoscaling runners.
• Pros: Zero tool sprawl , robust native security and compliance metrics , and powerful self-hosted or air-gapped deployment options.
• Cons: Steeper learning curve and heavier resource footprint if you choose to self-host.

Alternative Mentions

• Bitbucket: Best if your organization is already heavily standardized around Atlassian tools like Jira and Confluence . Its CI/CD tool, Bitbucket Pipelines, works fine , but the general community momentum favors GitHub or GitLab for bleeding-edge CI/CD.
• Gitea / Forgejo: Best if you want a lightweight, self-hosted solution on minimal hardware without GitLab's massive enterprise overhead . Gitea Actions even supports GitHub-style YAML syntax.

The Verdict

• Choose GitHub if you want the easiest developer onboarding, the most flexible third-party tool integrations, and plug-and-play workflows via the Marketplace.
• Choose GitLab if you want a strict, all-in-one DevSecOps pipeline with native security scanning, compliance auditing, and tighter control over private/self-hosted infrastructure.

To help narrow down the ideal pick, tell me:

• Are you planning to use cloud-hosted SaaS or self-host the platform?
• What technologies/languages or cloud providers (AWS, GCP, Azure, Kubernetes) will your CI/CD pipelines need to interact with?

• GitHub stands out as the overall industry leader, offering unlimited private repositories on free and paid tiers alongside GitHub Actions , which provides seamless, deeply integrated CI/CD directly within your workflow.
• GitLab provides an all-in-one DevOps platform with arguably the most powerful native CI/CD pipeline engine (GitLab CI/CD ) built right into the core product, handling everything from code hosting to advanced security scanning and deployment.
• Bitbucket is ideal for teams heavily invested in the Atlassian ecosystem (Jira, Confluence), offering deep integrations and solid native CI/CD through Bitbucket Pipelines.

To help narrow down the best platform for your specific setup, tell me:

• What languages/frameworks are you using?
• Do you have existing tools (like Jira or Docker Hub) you need to integrate with?
• Are you looking for a free tier or enterprise-grade features?

If your priorities are private repositories + excellent CI/CD integration, my recommendation is GitLab.

My ranking

🥇 1. GitLab — my pick

GitLab is particularly strong if CI/CD is a major consideration. Repositories, merge requests, CI/CD, package/container registries, security scanning, deployments, and project management are integrated into the same platform. GitLab explicitly supports private projects, and there is no limit on the number of private projects.

The biggest advantage is that CI/CD isn't an add-on bolted onto the repository:

Git push → merge request → tests → security scans → build artifact/container → staging → production

GitLab's package and container registries are also integrated with its source control and CI/CD, which makes it particularly nice for building a complete software delivery pipeline.

You also have deployment options ranging from GitLab.com to self-managed GitLab and single-tenant GitLab Dedicated.

🥈 2. GitHub + GitHub Actions

GitHub is arguably the best choice if developer experience and ecosystem are more important than having everything in one integrated DevOps platform.

GitHub Actions is extremely capable, and private repositories can share reusable workflows/actions within an organization.

I'd choose GitHub if you expect to:

• Work heavily with open-source projects
• Hire developers familiar with GitHub
• Use the enormous GitHub Actions ecosystem
• Integrate with lots of third-party developer tooling
• Eventually have some public repositories alongside private ones

In other words, GitHub is probably the safest general-purpose choice, while GitLab is my choice specifically for private source code + CI/CD.

🥉 3. Bitbucket + Pipelines

Atlassian's Bitbucket becomes very compelling if you're already using Jira and Confluence.

Bitbucket Pipelines is built directly into Bitbucket Cloud, so builds, tests, and deployments live alongside the repository. bitbucket.org It also has a large collection of integrations through Bitbucket Pipes.

The killer feature is really the Jira ↔ Bitbucket workflow. If your organization already revolves around Jira, I'd seriously consider it.

What I'd choose

If I were setting this up today:

Small/medium engineering team:
→ GitLab

Large developer ecosystem / maximum GitHub compatibility:
→ GitHub + Actions

Already deeply invested in Jira:
→ Bitbucket + Pipelines

Need to run the entire platform inside your own infrastructure:
→ GitLab Self-Managed is particularly attractive.

One important distinction: "private repository" doesn't mean the source code physically resides inside your network. GitLab.com, GitHub, and Bitbucket Cloud are hosted services. If your requirement is the source code must never leave your infrastructure, then I'd narrow the decision to self-managed GitLab or another self-hosted Git service rather than the SaaS offerings.

For your stated goal alone, I'd start with GitLab. It gives you the cleanest path from private source repository all the way through CI/CD, artifacts, security scanning, and deployment without assembling a bunch of separate services.