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APIs · head to head

Svix vs Tuum

Svix logo

Svix

APIs

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

From
Free
Rated
-
Full reviewWebsite
Tuum logo

Tuum

APIs

Modular core banking platform from Estonia, formerly branded Modularbank

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Svix has a free tier, so it costs nothing to try first.
  • Each has a real cost: 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.; Tuum it is a smaller, younger company than Mambu, so it has fewer live reference deployments and a shorter track record to evaluate risk against.
  • They diverge on capability: Svix covers Automatic retries, Tuum covers Modular product structure.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Svix and Tuum actually diverge.

Attributes where Svix and Tuum differ
AttributeSvixTuum
Starting priceFreeOn request
Pricing modelPer month by message countquote
Free tierYesNo
PlatformsWeb, Cloud, DockerWeb, API

Identical on both: 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 Svix

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

Only in Tuum

  • Modular product structure
  • Low-code integration middleware
  • Cloud-agnostic deployment
  • Multi-currency real-time accounts
  • Cards and lending modules
  • Faster migration timeline

What people use each for

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

Svix

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

Tuum

  • A bank wanting to migrate specific banking products to the cloud within months rather than replacing its entire core at oncenot Svix
  • A fintech in the DACH region or Middle East wanting a European core banking vendor with regional expansion focusnot Svix
  • An institution wanting low-code middleware to connect new modules to an existing legacy core rather than a full rebuildnot Svix
  • A company researching "Modularbank" that needs to confirm it is the same company now branded Tuumnot Svix

Where each one falls short

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

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.

Tuum

  • It is a smaller, younger company than Mambu, so it has fewer live reference deployments and a shorter track record to evaluate risk against.
  • The 2022-era rebrand from Modularbank to Tuum means older funding records, case studies and press coverage appear under a different name, complicating due diligence for anyone unaware of the change.
  • Pricing is entirely unpublished, requiring a sales conversation to budget against competing composable core vendors.
  • Its geographic expansion into DACH and the Middle East is comparatively recent, so support depth and local regulatory expertise in those markets are less proven than in its home Baltic and Nordic base.
  • As with any core banking platform, choosing Tuum is a multi-year infrastructure commitment; switching cores after implementation is a major undertaking regardless of how modular the initial adoption was.

Pricing, plan by plan

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

Tuum

On request
  • Tuum$undefined/year
    • Subscription and module-based pricing, not published
    • Custom quote required via sales

Which should you pick?

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

Choose Tuum if

  • You need modular product structure.
  • You work on Web, API.
  • You also want low-code integration middleware.
Tuum review

Questions people ask

Is Svix or Tuum better?
Neither clearly leads. Svix starts at Free and Tuum at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Svix or Tuum?
Svix has a free tier; the other does not. Paid plans start at Free for Svix and On request for Tuum.
Does Svix or Tuum run on more platforms?
Svix runs on Web, Cloud, Docker. Tuum runs on Web, API.
Can I use Svix for free?
Yes. Svix has a free tier, so you can try it without paying. Tuum starts at On request.
What is Svix best used for?
Svix is most often used for a saas company adding webhooks to its api that does not want to build retry, signing and a customer debugging ui from scratch, a payments or fintech product whose customers need signature verification libraries in several languages they did not write, an engineering team drowning in support tickets from customers whose endpoints silently failed and who need self-service delivery logs, a platform with a small number of very slow customer endpoints that must not delay deliveries to everyone else. Of those, a saas company adding webhooks to its api that does not want to build retry, signing and a customer debugging ui from scratch and a payments or fintech product whose customers need signature verification libraries in several languages they did not write are not what Tuum is typically brought in for.
What can Svix do that Tuum cannot?
Svix covers Automatic retries, Payload signing, Consumer portal, Event types and filtering. Tuum covers Modular product structure, Low-code integration middleware, Cloud-agnostic deployment, Multi-currency real-time accounts.

Answered from the vendors’ own pages

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.

Tuum: Is Tuum the same company as Modularbank?

Yes, Modularbank rebranded to Tuum; it is the same company and platform.

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.

Tuum: Where is it strongest geographically?

Its base is Estonia and the Nordic and Baltic region, with newer expansion into DACH and the Middle East.

Svix: What counts as a message?

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

Tuum: Is pricing published?

No, subscription and module pricing require a sales conversation.

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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