Heroku vs JSDelivr

What Heroku is

Heroku is a proprietary platform as a service that builds and runs applications in managed dyno containers, with pipelines, logs, data products and marketplace add-ons. Eco provides 1,000 shared personal-account dyno hours for $5 monthly and sleeps inactive web apps; Basic and larger dynos are usage-prorated up to published monthly caps. Dyno filesystems are ephemeral, so durable state belongs in databases or object storage. Compute, data services, add-ons, CI, support and private networking must be costed together.

What JSDelivr is

jsDelivr is a publicly available CDN for open-source files from npm, GitHub, WordPress and selected custom endpoints. Its terms permit free personal and commercial use without bandwidth or request limits when content and usage follow both jsDelivr and upstream-platform policies. The network uses multiple CDN providers and offers exact or aliased version URLs, an API, combination and optimization features. Production consumers should pin an exact reviewed release: aliases can resolve to newer code. The service is not general file/media hosting, private package delivery or a substitute for package, license and resilience review.

What Heroku is built to do

Managed dynos

Runs isolated application processes with platform-managed cycling and replacement.

Release workflow

Builds deployable releases and supports pipelines, review apps and one-off administrative processes.

Data and add-ons

Attaches Heroku data products and third-party marketplace services to applications.

Runtime tiers

Offers sleeping personal Eco dynos through always-on production and isolated Private/Shield options.

What JSDelivr is built to do

Public package endpoints

Serves files from npm, GitHub, WordPress and approved custom open-source sources.

Multi-CDN routing

Uses multiple providers and monitoring-based failover for public asset delivery.

Version selection

Supports exact releases and convenient aliases; exact pins are safer for reproducible production builds.

Package API

Returns versions, files, entry points, CDN links and download statistics for tooling.

Choose Heroku if

• Conventional stateless web and worker applications needing fast deployment and managed runtime operations
• Small experiments on Eco where sleep and the shared 1,000-hour pool are acceptable
• Production services after sizing dynos, databases, add-ons, regions and support as one bill

Skip Heroku if

• The application needs persistent local disk, privileged host access or unusual infrastructure control
• Cold starts, a single Eco dyno per process type or hour exhaustion are unacceptable
• Data residency is assumed from the app region without reviewing control-plane and add-on behavior

Choose JSDelivr if

• Public npm or GitHub packages that need zero-cost global asset delivery
• Static sites using exact reviewed dependency versions
• Open-source maintainers who want public package metadata and download statistics

Skip JSDelivr if

• The workload is proprietary, private, general-purpose storage or large-scale media hosting
• The application requires negotiated uptime and support-response commitments
• Security policy cannot allow a third-party domain or the build cannot pin and review dependencies

Heroku: pros & cons

• Managed runtime: Heroku handles container placement, restarts and underlying operating-system administration.
• Simple release model: Source or container deployments, configuration variables and one-off commands support repeatable application delivery.
• Integrated ecosystem: Pipelines, review apps, Postgres, Key-Value Store and marketplace add-ons reduce integration work.
• Granular billing: Most dynos and data add-ons are prorated to the second up to a monthly maximum.
• No general free compute tier: Eco costs $5 monthly, is personal-app only and can exhaust its shared hour pool.
• Eco cold starts: Inactive web dynos sleep after 30 minutes and wake with a delay.
• Ephemeral local disk: Files written at runtime disappear across restarts, deploys or dyno replacement.
• Stacked cost: Production dynos, databases, add-ons, CI, teams and support can materially exceed the headline compute price.

JSDelivr: pros & cons

• Free permitted use: The published terms allow personal and commercial use without request or bandwidth limits.
• Broad public-package access: npm, GitHub and WordPress paths cover common open-source distribution workflows.
• Resilient delivery design: Multiple CDN and DNS providers plus health-based routing reduce dependence on one edge network.
• Developer tooling: Public APIs expose package versions, files, entry points, CDN URLs and download statistics.
• Strict usage scope: General image, video, backup or bulk file hosting is prohibited.
• Mutable aliases add risk: Unpinned version ranges or latest URLs can deliver code different from a reviewed build.
• Upstream rules still apply: Content must satisfy npm, GitHub or other source-platform terms as well as jsDelivr's policy.
• Free support is limited: Published terms promise a reasonable level of issue/email support, not a customer-specific response SLA.