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APIs · head to head

Liveblocks vs Svix

Liveblocks logo

Liveblocks

APIs

Realtime collaboration infrastructure for building multiplayer features

From
Free
Rated
-
Full reviewWebsite
Svix logo

Svix

APIs

Outbound webhook sending as a service, with retries, signing and a customer-facing portal

From
Free
Rated
-
Full reviewWebsite

The short version

  • Each has a real cost: Liveblocks on the Free plan, each metered feature has a hard cap and simply pauses when exceeded rather than allowing overage.; Svix the Professional tier at 490 US dollars a month includes the same 50,000 messages as the free tier, so the upgrade buys SLA, throughput and retention rather than volume, which is a jarring step for a growing product.
  • They diverge on capability: Liveblocks covers Realtime presence and cursors, Svix covers Automatic retries.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Liveblocks and Svix actually diverge.

Attributes where Liveblocks and Svix differ
AttributeLiveblocksSvix
Pricing modelfreemiumPer month by message count
Platformsweb, apiWeb, Cloud, Docker

Identical on both: starting price (Free), 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 Liveblocks

  • Realtime presence and cursors
  • Comments
  • Version history
  • Custom notifications
  • SSO and SOC 2
  • Management API

Only in Svix

  • Automatic retries
  • Payload signing
  • Consumer portal
  • Event types and filtering
  • Delivery logs and replay
  • Rate limiting
  • Static source IPs
  • Language SDKs

What people use each for

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

Liveblocks

  • Adding live cursors and presence to a collaborative editornot Svix
  • Building threaded comments on documents or designsnot Svix
  • Sending realtime notifications tied to collaborative actionsnot Svix
  • Restoring previous versions of collaborative contentnot Svix

Svix

  • A SaaS company adding webhooks to its API that does not want to build retry, signing and a customer debugging UI from scratchnot Liveblocks
  • A payments or fintech product whose customers need signature verification libraries in several languages they did not writenot Liveblocks
  • An engineering team drowning in support tickets from customers whose endpoints silently failed and who need self-service delivery logsnot Liveblocks
  • A platform with a small number of very slow customer endpoints that must not delay deliveries to everyone elsenot Liveblocks

Where each one falls short

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

Liveblocks

  • On the Free plan, each metered feature has a hard cap and simply pauses when exceeded rather than allowing overage.
  • The jump from Pro ($30/month) to Team (starting at $600/month) is steep for teams that outgrow Pro but don't need full Team scale.
  • Multi-region hosting and SCIM provisioning are Enterprise-only and require custom pricing.

Svix

  • The Professional tier at 490 US dollars a month includes the same 50,000 messages as the free tier, so the upgrade buys SLA, throughput and retention rather than volume, which is a jarring step for a growing product.
  • Only attempted messages count toward usage, but a customer with many subscribed endpoints multiplies a single event into many billable messages, and forecasting that fan-out before launch is difficult.
  • The open source server is MIT licensed but trails the hosted product in features, so self-hosting is a fallback position rather than a genuinely equivalent option.
  • Routing outbound customer traffic through a third party puts a vendor in the delivery path for events your customers may treat as contractual, which some security reviews will not accept.
  • Payload retention is 30 days on the free tier and 90 on Professional, so anyone needing longer delivery history for audit must pay for Enterprise or log independently.

Pricing, plan by plan

Liveblocks

Free
  • FreeFree
    • 10 projects
    • 3 dashboard seats
    • 10 simultaneous connections per room
  • Pro$30/month
    • $30 monthly credits
    • Removes Liveblocks branding
    • 3 dashboard seats
  • Team$600/month
    • SSO and SOC 2
    • 10 dashboard seats
    • 50 connections/room

Svix

Free
  • FreeFree
    • 50,000 messages a month included
    • Overage at $0.0001 per message
    • 99.9% uptime SLA
  • Professional$490/month
    • 50,000 messages included, same as free
    • 99.99% uptime SLA
    • 800 messages per second
  • Enterprise$undefined/year
    • Custom volume and rate limits
    • 99.999% uptime SLA
    • Custom retention

Which should you pick?

Choose Liveblocks if

  • You need realtime presence and cursors.
  • You want to start without paying.
  • You work on web, api.
  • You also want comments.
Liveblocks review

Choose Svix if

  • You need automatic retries.
  • You want to start without paying.
  • You work on Web, Cloud, Docker.
  • You also want payload signing.
Svix review

Questions people ask

Is Liveblocks or Svix better?
Neither clearly leads. Liveblocks starts at Free and Svix at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Liveblocks or Svix?
Liveblocks starts at Free and Svix at Free.
Does Liveblocks or Svix run on more platforms?
Liveblocks runs on web, api. Svix runs on Web, Cloud, Docker.
Can I use Liveblocks for free?
Both have a free tier, so you can try either at no cost before committing.
What is Liveblocks best used for?
Liveblocks is most often used for adding live cursors and presence to a collaborative editor, building threaded comments on documents or designs, sending realtime notifications tied to collaborative actions, restoring previous versions of collaborative content. Of those, adding live cursors and presence to a collaborative editor and building threaded comments on documents or designs are not what Svix is typically brought in for.
What can Liveblocks do that Svix cannot?
Liveblocks covers Realtime presence and cursors, Comments, Version history, Custom notifications. Svix covers Automatic retries, Payload signing, Consumer portal, Event types and filtering.

Answered from the vendors’ own pages

Liveblocks: What does Liveblocks cost?

Liveblocks offers a Free plan with hard usage caps, a Pro plan at $30/month ($25/month billed annually) including $30 in monthly credits, a Team plan from $600/month, and custom Enterprise pricing.

Source
Svix: How much does Svix cost?

Free up to 50,000 messages a month; Professional starts at 490 US dollars a month with the same included volume but better SLA and throughput.

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

Yes, the Free plan includes 10 projects, 3 dashboard seats, 10 simultaneous connections per room, 3,000 collaboration minutes, 200 comments, and 1GB of realtime data storage, with features pausing once a cap is hit.

Source
Svix: Can I self-host it?

Yes, there is an MIT licensed server, but it lags the hosted service in features and has no SLA.

Liveblocks: How is usage metered?

Paid plans include monthly credits covering collaboration minutes, comments, and storage; usage beyond the credit is billed at metered rates such as $0.002 per collaboration minute and $0.01 per comment, with credits resetting each billing cycle without rollover.

Source
Svix: What counts as a message?

Attempted or transformed deliveries. Retries and messages filtered out because no endpoint subscribed are not charged.

Svix: Does it handle inbound webhooks?

Its focus is outbound sending on behalf of API providers, not receiving webhooks from third parties.

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