Best Application Security Software for Private Code in 2026 | Top Rated

For a small software company, the first application security purchase should cover the code it actually ships. Start with GitHub Code Security plus Secret Protection when development already lives in GitHub and keeping security inside that workflow matters most. Compare Semgrep when you want separately selectable source, dependency and secrets analysis across your development environment. Aikido is the bundle alternative; Checkmarx One becomes relevant when deployment requirements and a broader security program determine the purchase.

This guide is for an engineering lead with roughly ten contributors, private repositories and enough technical capacity to configure checks, but no appetite for maintaining disconnected scanners. It compares documented coverage and commercial boundaries, not measured detection accuracy. Sources were checked on 10 November 2026; no hands-on tests were performed.

Decide which coverage deserves a subscription

Application security software identifies weaknesses in software during development and operation. Here the buying unit is a package for source-code weaknesses, vulnerable dependencies and exposed credentials. Static application security testing, or SAST, examines code; software composition analysis, or SCA, examines dependencies. Secret detection addresses credentials that should not be committed. These jobs overlap operationally but are not interchangeable.

Before replacing anything, list the checks already running on private repositories. GitHub's security comparison distinguishes included Dependabot capabilities from paid Code Security and Secret Protection. Buying a new platform solely to obtain dependency update pull requests can duplicate a capability you already have. A source scanner also does not establish that a deployed application's authorization logic has been tested.

For a solo developer, begin with the relevant free limits. Semgrep's Free Edition includes Code and Supply Chain for up to ten contributors and ten repositories; its commercial Secrets product is a separate decision. Aikido Developer includes two users and ten repositories, with scheduled rescans every three days. Neither boundary should be mistaken for unrestricted team coverage. Use a representative private repository before buying a team package.

For the primary small-company reader, GitHub and Semgrep are the first pair to compare. For a larger organization requiring self-hosted source control or dedicated infrastructure, compare Semgrep Enterprise with a tailored Checkmarx One configuration. Those are different procurement routes, not a reason to impose an enterprise contract on a ten-person team.

Compare the package before comparing the headline price

The table compares purchase boundaries, not equivalent engines or equal detection results. The GitHub security plans, Semgrep pricing, Aikido plans and Checkmarx package cards support those distinctions. Language support, private package access and actual scan completion remain prerequisites for your particular codebase.

Keep the category boundary visible. A firewall purchase protects a different part of the system. An application security posture management overlay coordinates findings from retained scanners. An AI fixing assistant addresses remediation after detection. None automatically replaces the source, dependency and secret coverage in this comparison.

GitHub Code Security and Secret Protection: buy around the repository

GitHub is the practical first finalist when private code, reviews and repository administration already live there. Code Security provides CodeQL and paid dependency-review capabilities; Secret Protection separately supplies secret scanning and push protection. Choose both when all three coverage jobs are mandatory. Purchasing Code Security alone does not satisfy that requirement.

Its documented starting workflow is concrete. A repository administrator enables GitHub Actions and Code Security, opens the repository's security settings, and selects CodeQL default setup. Review the detected languages and query suite before enabling the configuration. Grant access to private package registries where needed. The first successful analysis matters more than an enabled-setting label: GitHub documents that default setup can remain enabled even when every supported-language analysis fails.

During ordinary development, developers review code-scanning alerts alongside their changes and handle dependency updates through pull requests. The engineering lead maintains language coverage, private-registry access, runner configuration and alert policy. Repositories with unusual build requirements can need developer or platform-engineering help. These are documented setup responsibilities, not an estimate of setup time or ease of use.

Choose GitHub over Semgrep when keeping the work in the existing repository platform outweighs adding a separately administered analysis platform. Reverse that choice when your required stack or scanning workflow fits Semgrep better, or when source-control deployment requirements exceed the GitHub configuration you intend to buy. Neither product earns a detection-quality victory from its integration location.

Semgrep: buy the analysis products you need

Semgrep is the alternative for a team that wants Code, Supply Chain and Secrets as explicit product choices. That modularity helps a buyer describe exactly what is being purchased. It also means the Code starting price is not the price of the full package. For the three-job requirement, put all three products on the order.

Managed Scans adds repositories without changing existing CI workflows. It runs weekly full scans and scans changes in pull or merge requests. For GitHub, the documented access method uses a private Semgrep GitHub app created and registered in the organization. A source-control administrator must approve repository access; the application team then handles findings and policy choices.

There is a useful dividing line between managed scanning and CI. Supply Chain findings require supported manifests or lockfiles; Managed Scans does not generate them. Existing custom scanning configurations are not automatically copied into Managed Scans. If the analysis needs additional build steps, Semgrep directs teams toward CI. Choose the deployment around those prerequisites rather than assuming managed scanning removes every technical task.

For ordinary work, review new findings in the change workflow and use full scans to review the wider repository. Keep responsibility for repository additions, policy changes and billing contributor counts with a named engineering or security lead. Semgrep documents temporary repository clones for managed scanning and deletion of those clones afterward; that statement does not establish the retention policy for every finding or AI interaction.

Choose Semgrep over GitHub when its supported analysis and deployment choices better fit your code and you are willing to administer a separate platform. Stay with GitHub when those differences do not solve a present requirement. Enterprise buyers can consider Semgrep Enterprise for on-premises source-control support, custom CI integrations and optional dedicated infrastructure, all with custom commercial terms.

Aikido: make the broader bundle earn its place

Aikido Basic combines SAST, SCA and secret detection with PR Security Review. This is a credible alternative for a small team replacing several checks together, particularly when container, infrastructure or cloud coverage is also relevant. Do not count those extra areas as value if nobody will configure or use them.

The GitHub PR setup installs the Aikido PR Checks app, selects repositories and configures scan types and a failure threshold. The repository platform still controls whether a failing status blocks a merge. An administrator needs to make the check required if blocking is the intended policy. Developers then work from findings attached to a change, while the lead maintains exceptions and onboarding for new repositories.

Choose Basic when that hosted bundle meets your requirements. If source must be scanned locally, compare the qualifying Pro configuration rather than attaching Basic's commercial terms to Pro's feature. The pricing page lists Basic's included ten users and hundred repositories, but the retrieved paid-plan amounts did not establish an unambiguous USD denomination and selected billing state. Accordingly, this guide uses a USD quote requirement instead of presenting an inferred dollar price. Aikido remains a coverage finalist, without a cheapest-product claim.

Checkmarx One: specify the enterprise configuration

Checkmarx One Essentials includes SAST and SCA, but its package card places Secrets Detection among the add-ons. Enterprise includes it. For this guide's baseline, request Essentials plus Secrets Detection or the broader Enterprise package only when its additional capabilities are needed. A SAST-only quote would not answer the same purchase question.

Checkmarx states that pricing depends on modules, deployment model and developers in scope. It offers SaaS or self-hosted configurations. Compare that route with Semgrep Enterprise when organizational deployment constraints, rather than a small-team starting price, decide eligibility. For self-hosted source control plus dedicated scanning infrastructure, Semgrep explicitly documents those Enterprise options; Checkmarx's quote must specify which self-hosted components are actually supplied.

Request the same repository, language and dependency inventory from both finalists, with identity integration, audit access, support commitments, data location, migration assistance and export terms written into the proposed configuration. These are contract-specific unknowns here, not verified product absences. Keep the enterprise selection conditional until they are resolved. A small team without these requirements should continue with the earlier finalists.

Put the same workload on each order

Consider a hypothetical US-dollar purchase for ten active private-code contributors, twenty private repositories, source analysis, dependency analysis and secret detection. Assume the team already pays for ten GitHub Team users and keeps that hosting for every option. No advanced AI scanning or automatic-fix consumption is assumed.

GitHub lists Code Security at $30 and Secret Protection at $19 per active committer per month. Ten contributors using both produce a $490 monthly security component. GitHub Team's published $4 per user per month adds a common $40 hosting baseline, giving $530 in known monthly subscription components. Actions usage beyond included allowances and other metered services are additional. Active-committer billing uses a rolling 90-day window; a departed contributor may therefore remain in the count.

Semgrep lists Code at $30, Supply Chain at $30 and Secrets at $15 per contributor per month. Ten contributors across all three produce a $750 monthly list-rate equivalent, or $790 including the same $40 hosting baseline. This is component arithmetic, not a binding combined quote: the retrieved pricing page did not establish a paid seat minimum, contract commitment or cancellation terms. Do not assume the free Code and Supply Chain allowance stacks with a Secrets purchase for this twenty-repository workload.

Apply that same ten-contributor, twenty-repository specification to Aikido Basic and Checkmarx Essentials plus Secrets. Obtain USD terms, purchase minimum, billing commitment, renewal and cancellation conditions, included usage and any paid onboarding. Compare annual commitments only after their actual terms are available. No total for either quoted route is invented here.

The buying decision is whether the added subscription replaces enough work or delivers necessary coverage. Record current scanner invoices, CI charges and engineering effort separately; subtract only subscriptions you can actually cancel. Compare the new recurring fee plus operating and migration costs. Released engineering time is capacity, not cash savings unless expenditure really changes.

Pay more for a demonstrated requirement: supported analysis your current package cannot run, a needed deployment model, or controls the organization must procure. Stay with included dependency updates when they solve the whole present job; use a free source-analysis tier when its limits fit. For this private-code workload, start with GitHub's complete package and Semgrep's complete package, then bring Aikido into the comparison if consolidation extends beyond code. The next useful evidence is a completed scan of your stack and a qualifying order, not another list of features.