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APIs · head to head

Ably vs Gravitee

Ably logo

Ably

APIs

Realtime data delivery platform for pub/sub messaging at scale

From
Free
Rated
-
Full reviewWebsite
Gravitee logo

Gravitee

APIs

Open source API management platform for event-native APIs

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Ably standard and Pro plans layer usage-based charges for messages, connection minutes, and data transfer on top of the base subscription, adding cost complexity.; Gravitee the entry paid API management tier is $2,500 a month and includes a single production gateway
  • They diverge on capability: Ably covers Pub/sub messaging, Gravitee covers API Gateway.
  • Prices and features above were last checked on 30 August 2026.

Where they differ

Only the attributes on which Ably and Gravitee actually diverge.

Attributes where Ably and Gravitee differ
AttributeAblyGravitee
Platformsweb, ios, android, apiCloud, On-premise, Kubernetes
FoundedUnknown2015

Identical on both: starting price (Free), pricing model (freemium), free tier (Yes), user rating (Not yet rated), category (APIs).

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 Ably

  • Pub/sub messaging
  • Presence
  • Message persistence
  • Multi-protocol support
  • Encryption
  • Datadog integration

Only in Gravitee

  • API Gateway
  • Developer Portal
  • Analytics Dashboard
  • Kubernetes
  • Docker
  • Kafka
  • LDAP
  • Cloud support

What people use each for

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

Ably

  • Building realtime chat or collaborative appsnot Gravitee
  • Delivering live data feeds like stock prices or sports scoresnot Gravitee
  • Broadcasting notifications to many concurrent clientsnot Gravitee
  • Running mission-critical realtime infrastructure with high uptime SLAsnot Gravitee

Gravitee

  • API gateway and lifecycle managementnot Ably
  • Exposing Kafka event streams as managed APIsnot Ably
  • Protocol mediation between event brokers and clientsnot Ably
  • Self-hosting an open source API gatewaynot Ably
  • Access control and authentication in front of internal APIsnot Ably

Where each one falls short

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

Ably

  • Standard and Pro plans layer usage-based charges for messages, connection minutes, and data transfer on top of the base subscription, adding cost complexity.
  • The jump from Standard ($29/month) to Pro ($399/month) is steep for teams needing more than 10k connections but not full Pro capacity.
  • 24/7 mission-critical support and 99.999% uptime SLAs are reserved for the custom-priced Enterprise tier.

Gravitee

  • The entry paid API management tier is $2,500 a month and includes a single production gateway
  • Event management is priced separately, starting at $1,250 a month for the Comet tier
  • Tiers are gated on gateway and broker counts, so scaling horizontally means moving tier rather than paying incrementally
  • Data logging masking and other enterprise features are withheld from the lowest paid tier
  • 24/7 support requires the top Universe tier

Pricing, plan by plan

Ably

Free
  • FreeFree
    • 200 concurrent connections
    • 500 messages/second
    • 6M messages/month
  • Standard$29/month
    • 10k concurrent channels
    • 10k concurrent connections
    • 2.5k messages/second
  • Pro$399/month
    • 50k concurrent channels
    • 50k concurrent connections
    • 10k messages/second

Gravitee

Free
  • CommunityFree
    • API Gateway
    • Basic analytics
    • Community support
  • Enterprise$1500/monthly
    • Advanced features
    • SLA support
    • SSO integration
  • Custom$undefined/monthly
    • Custom deployment
    • Dedicated support
    • Premium SLA

Which should you pick?

Choose Ably if

  • You need pub/sub messaging.
  • You want to start without paying.
  • You work on web, ios, android, api.
  • You also want presence.
Ably review

Choose Gravitee if

  • You need api gateway.
  • You want to start without paying.
  • You work on Cloud, On-premise, Kubernetes.
  • You also want developer portal.
Gravitee review

Questions people ask

Is Ably or Gravitee better?
Neither clearly leads. Ably starts at Free and Gravitee at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Ably or Gravitee?
Ably starts at Free and Gravitee at Free.
Does Ably or Gravitee run on more platforms?
Ably runs on web, ios, android, api. Gravitee runs on Cloud, On-premise, Kubernetes.
Can I use Ably for free?
Both have a free tier, so you can try either at no cost before committing.
What is Ably best used for?
Ably is most often used for building realtime chat or collaborative apps, delivering live data feeds like stock prices or sports scores, broadcasting notifications to many concurrent clients, running mission-critical realtime infrastructure with high uptime slas. Of those, building realtime chat or collaborative apps and delivering live data feeds like stock prices or sports scores are not what Gravitee is typically brought in for.
What can Ably do that Gravitee cannot?
Ably covers Pub/sub messaging, Presence, Message persistence, Multi-protocol support. Gravitee covers API Gateway, Developer Portal, Analytics Dashboard, Kubernetes.

Answered from the vendors’ own pages

Ably: What does Ably cost?

Ably offers a free plan with 200 concurrent connections, a Standard plan at $29/month plus usage, a Pro plan at $399/month plus usage, and custom Enterprise pricing with unlimited channels and connections.

Source
Gravitee: What is Gravitee's pricing model?

Gravitee uses a tiered subscription model with monthly flat pricing. The Planet tier for API Management starts at $2,500/month with one production gateway, while the Comet tier for Event Management starts at $1,250/month.

Source
Ably: Is there a free plan, and what are its limits?

Yes, the free plan includes 200 concurrent connections, 500 messages per second, and 6 million messages per month with community and best-effort email support.

Source
Gravitee: Are there hidden fees with Gravitee?

No. Gravitee explicitly states there are no hidden fees, and all tiers include unlimited users and unlimited APIs under management.

Source
Ably: How is usage metered?

Beyond plan limits, Ably charges usage-based rates of $2.50 per million messages, $1.00 per million connection minutes, $1.00 per million channel minutes, and $0.25 per GiB of data transfer, with volume discounts available.

Source
Gravitee: What does higher tier pricing include in Gravitee?

Higher tiers add more production gateways, enterprise plugins, and enhanced support levels ranging from Gold to Platinum/Diamond support.

Source
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