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Developer Tools · head to head

Bazel vs Convoy

Bazel logo

Bazel

Developer Tools

Multi-language build system with fast, correct incremental builds

From
Free
Rated
-
Full reviewWebsite
Convoy logo

Convoy

APIs

Open source webhooks gateway you self-host, handling both sending and receiving

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Bazel steep learning curve for developers unfamiliar with build systems; Convoy the default deployment is self-hosted, so you operate Convoy plus Postgres and Redis and carry the on-call burden for the system that delivers your customers' events.
  • They diverge on capability: Bazel covers Fast incremental builds, Convoy covers Inbound and outbound.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Bazel and Convoy actually diverge.

Attributes where Bazel and Convoy differ
AttributeBazelConvoy
Pricing modelopen-sourcePer month, flat rate regardless of volume
PlatformsWindows, macOS, LinuxLinux, Docker, Kubernetes, Cloud
CategoryDeveloper ToolsAPIs

Identical on both: starting price (Free), free tier (Yes), user rating (Not yet rated).

What each one covers

Drawn from each product's published feature list. An absence here means we hold no record of it - not that the product lacks it.

Only in Bazel

  • Fast incremental builds
  • Multi-language support
  • Distributed caching
  • Parallel execution
  • Dependency analysis
  • Starlark extensibility
  • Cross-platform support

Only in Convoy

  • Inbound and outbound
  • Broker-driven ingestion
  • Payload transformation
  • Portal links
  • Circuit breaking
  • Retry policies
  • OpenTelemetry export
  • Role-based access control

What people use each for

The jobs each tool is most often brought in to do.

Bazel

  • Building large monorepos with hundreds of interdependent projectsnot Convoy
  • Multi-language projects requiring consistent build semanticsnot Convoy
  • Organizations requiring reproducible builds and hermetic test executionnot Convoy
  • Teams implementing distributed CI with shared build artifact cachingnot Convoy

Convoy

  • A fintech that cannot route customer webhook traffic through a third-party SaaS for compliance reasonsnot Bazel
  • A high-volume platform for which per-message webhook pricing costs more than the flat premium licencenot Bazel
  • A team that also receives webhooks from many providers and wants ingestion, verification and deduplication in the same gatewaynot Bazel
  • An engineering group that wants webhook delivery driven directly from an existing Kafka or SQS topicnot Bazel

Where each one falls short

Documented limitations, not opinions. Every one is a constraint you would hit in normal use.

Bazel

  • Steep learning curve for developers unfamiliar with build systems
  • Initial setup complexity; requires BUILD files and Bazel configuration
  • Verbose error messages can be difficult to debug for new users
  • Smaller community and fewer third-party integrations vs enterprise tools

Convoy

  • The default deployment is self-hosted, so you operate Convoy plus Postgres and Redis and carry the on-call burden for the system that delivers your customers' events.
  • Frain Technologies is a small startup, and putting customer-facing delivery infrastructure on it means accepting real vendor continuity risk on a component that is hard to swap out quickly.
  • The premium tier at a flat 999 US dollars a month is poor value below substantial volume, while the community edition omits the portal, transformations and RBAC that most production deployments end up wanting.
  • The hosted cloud trial is capped at one project and 100 events a day, which is too small to properly evaluate the service before committing.
  • Documentation and the third-party ecosystem are thinner than the established webhook services, so unusual configurations often mean reading the Go source.

Pricing, plan by plan

Bazel

Free

No published plan breakdown. See the Bazel review.

Convoy

Free
  • CommunityFree
    • Self-hosted open source gateway
    • Inbound and outbound webhooks
    • Automatic retries and message broker support
  • Premium$999/month
    • Flat rate irrespective of message volume
    • Portal links and payload transformation
    • RBAC, circuit breaking and white labelling
  • Enterprise$undefined/year
    • SAML SSO
    • Dedicated support with SLA
    • On-premises deployment assistance
  • Cloud$undefined/month
    • Hosted by Convoy
    • 14 day trial limited to one project and 100 events a day
    • Usage-based tiers above the trial

Which should you pick?

Choose Bazel if

  • You need fast incremental builds.
  • You want to start without paying.
  • You work on Windows, macOS, Linux.
  • You also want multi-language support.
Bazel review

Choose Convoy if

  • You need inbound and outbound.
  • You want to start without paying.
  • You work on Linux, Docker, Kubernetes, Cloud.
  • You also want broker-driven ingestion.
Convoy review

Questions people ask

Is Bazel or Convoy better?
Neither clearly leads. Bazel starts at Free and Convoy at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Bazel or Convoy?
Bazel starts at Free and Convoy at Free.
Does Bazel or Convoy run on more platforms?
Bazel runs on Windows, macOS, Linux. Convoy runs on Linux, Docker, Kubernetes, Cloud.
Can I use Bazel for free?
Both have a free tier, so you can try either at no cost before committing.
What is Bazel best used for?
Bazel is most often used for building large monorepos with hundreds of interdependent projects, multi-language projects requiring consistent build semantics, organizations requiring reproducible builds and hermetic test execution, teams implementing distributed ci with shared build artifact caching. Of those, building large monorepos with hundreds of interdependent projects and multi-language projects requiring consistent build semantics are not what Convoy is typically brought in for.
What can Bazel do that Convoy cannot?
Bazel covers Fast incremental builds, Multi-language support, Distributed caching, Parallel execution. Convoy covers Inbound and outbound, Broker-driven ingestion, Payload transformation, Portal links.

Answered from the vendors’ own pages

Bazel: Does Bazel support distributed builds across CI infrastructure?

Yes, Bazel supports distributed execution and remote caching, allowing build work to be distributed across multiple machines and CI agents.

Source
Convoy: Is Convoy really open source?

Yes, the community edition is open source and self-hostable, covering both inbound and outbound webhooks with retries.

Bazel: What languages can be built with Bazel?

Bazel has built-in support for Java, C++, Go, Python, and Android/iOS development, with additional language support available through custom rules and community extensions.

Source
Convoy: What does premium cost?

A flat 999 US dollars a month, self-hosted, regardless of message volume.

Bazel: Can I use Bazel for small projects or is it only for large monorepos?

While Bazel excels at handling large projects, it can be used for smaller codebases. However, the setup overhead may not be justified for very small or simple projects.

Source
Convoy: Does it receive webhooks as well as send them?

Yes, inbound ingestion with verification and deduplication is a first-class feature, unlike most webhook services.

Convoy: Do I have to self-host?

No, there is a hosted cloud, but the trial is capped at 100 events a day and self-hosting is the primary model.

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