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APIs · head to head

Convoy vs Flutter

Convoy logo

Convoy

APIs

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

From
Free
Rated
-
Full reviewWebsite
Flutter logo

Flutter

Mobile Development

Google’s open-source framework for building apps from one codebase

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: 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.; Flutter dart is used almost nowhere else, so the language itself is a hiring and learning cost
  • They diverge on capability: Convoy covers Inbound and outbound, Flutter covers Single codebase, many targets.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Convoy and Flutter actually diverge.

Attributes where Convoy and Flutter differ
AttributeConvoyFlutter
Pricing modelPer month, flat rate regardless of volumeOpen source, no licence fee
PlatformsLinux, Docker, Kubernetes, CloudiOS, Android, Web, Windows, macOS, Linux
CategoryAPIsMobile Development

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 Convoy

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

Only in Flutter

  • Single codebase, many targets
  • Own rendering engine
  • Hot reload
  • Widget library
  • Ahead-of-time compilation
  • DevTools

What people use each for

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

Convoy

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

Flutter

  • Shipping one app to iOS and Android with a small teamnot Convoy
  • Interfaces with heavy custom design that need to look identical on both platformsnot Convoy
  • Adding web or desktop builds to an existing mobile codebasenot Convoy
  • Prototyping quickly where hot reload shortens the design loopnot Convoy

Where each one falls short

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

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.

Flutter

  • Dart is used almost nowhere else, so the language itself is a hiring and learning cost
  • Because Flutter draws its own widgets, apps can feel subtly unlike the platform unless deliberately styled per-platform
  • Binary sizes are larger than equivalent native apps because the engine ships with the app
  • Access to a brand-new platform API waits on a plugin, or on writing platform channel code yourself

Pricing, plan by plan

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

Flutter

Free
  • FlutterFree
    • Full framework
    • All platform targets
    • Dart toolchain

Which should you pick?

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

Choose Flutter if

  • You need single codebase, many targets.
  • You want to start without paying.
  • You work on iOS, Android, Web, Windows, macOS, Linux.
  • You also want own rendering engine.
Flutter review

Questions people ask

Is Convoy or Flutter better?
Neither clearly leads. Convoy starts at Free and Flutter at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Convoy or Flutter?
Convoy starts at Free and Flutter at Free.
Does Convoy or Flutter run on more platforms?
Convoy runs on Linux, Docker, Kubernetes, Cloud. Flutter runs on iOS, Android, Web, Windows, macOS, Linux.
Can I use Convoy for free?
Both have a free tier, so you can try either at no cost before committing.
What is Convoy best used for?
Convoy is most often used for a fintech that cannot route customer webhook traffic through a third-party saas for compliance reasons, a high-volume platform for which per-message webhook pricing costs more than the flat premium licence, a team that also receives webhooks from many providers and wants ingestion, verification and deduplication in the same gateway, an engineering group that wants webhook delivery driven directly from an existing kafka or sqs topic. Of those, a fintech that cannot route customer webhook traffic through a third-party saas for compliance reasons and a high-volume platform for which per-message webhook pricing costs more than the flat premium licence are not what Flutter is typically brought in for.
What can Convoy do that Flutter cannot?
Convoy covers Inbound and outbound, Broker-driven ingestion, Payload transformation, Portal links. Flutter covers Single codebase, many targets, Own rendering engine, Hot reload, Widget library.

Answered from the vendors’ own pages

Convoy: Is Convoy really open source?

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

Flutter: Is Flutter free?

Yes. Flutter is open source with no licence fee. The framework is under a Creative Commons Attribution 4.0 licence and its code samples under the 3-Clause BSD licence.

Convoy: What does premium cost?

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

Flutter: What language does Flutter use?

Dart, a language Google designed for fast startup and ahead-of-time compilation to native code.

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.

Flutter: Can Flutter build for more than mobile?

Yes. The same codebase targets iOS, Android, web, Windows, macOS, Linux and embedded devices, though mobile remains the most mature target.

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.

Flutter: How is Flutter different from React Native?

Flutter draws its own widgets with its own engine, so the result is pixel-identical across platforms. React Native renders to the real native components of each platform. Flutter uses Dart; React Native uses JavaScript and React.

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