Softwr

APIs · head to head

Highnote vs Zeplo

Highnote logo

Highnote

APIs

Card issuing, acquiring and ledger on one platform for embedded payments

From
On request
Rated
-
Full reviewWebsite
Zeplo logo

Zeplo

APIs

Message queue as a URL prefix, adding retries and delays to any HTTP request

From
Free
Rated
-
Full reviewWebsite

The short version

  • Only Zeplo has a free tier, so it costs nothing to try first.
  • Each has a real cost: Highnote card issuing requires a sponsor bank, and that bank sets programme approval, compliance obligations and often minimum volumes, so a small programme can be rejected regardless of technical fit.; Zeplo zeplo sits directly in the execution path of your background work, so an outage at a very small vendor means your jobs do not run at all, and there is no published SLA below Enterprise.
  • They diverge on capability: Highnote covers Card issuing, Zeplo covers URL prefix interface.
  • Prices and features above were last checked on 1 September 2026.

Where they differ

Only the attributes on which Highnote and Zeplo actually diverge.

Attributes where Highnote and Zeplo differ
AttributeHighnoteZeplo
Starting priceOn requestFree
Pricing modelquotePer month by request count
Free tierNoYes
PlatformsWeb, APIWeb, Cloud

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 Highnote

  • Card issuing
  • Merchant acquiring
  • Unified ledger
  • Spend controls
  • GraphQL API
  • Programme management
  • Dispute handling
  • Real time authorisation webhooks

Only in Zeplo

  • URL prefix interface
  • Retries with backoff
  • Delayed delivery
  • Cron scheduling
  • Concurrency limits
  • Deduplication keys
  • Request logs
  • Team workspaces

What people use each for

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

Highnote

  • A marketplace that both pays out to sellers and issues them spend cards, wanting one settlement ledgernot Zeplo
  • A vertical software company embedding card acceptance and card issuing for the same customer basenot Zeplo
  • A fintech launching a commercial charge card programme with custom authorisation logicnot Zeplo
  • A platform replacing separate issuing and acquiring vendors to remove cross system reconciliationnot Zeplo

Zeplo

  • A Vercel or Cloudflare Workers application that needs retried background jobs without deploying a separate always-on workernot Highnote
  • A team that wants a webhook receiver protected by a concurrency limit so a burst does not overwhelm a downstream APInot Highnote
  • A small product needing cron jobs against HTTP endpoints without adding a scheduler to its infrastructurenot Highnote
  • A developer adding idempotent retries to an unreliable third-party API call with a one-line URL changenot Highnote

Where each one falls short

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

Highnote

  • Card issuing requires a sponsor bank, and that bank sets programme approval, compliance obligations and often minimum volumes, so a small programme can be rejected regardless of technical fit.
  • Pricing is entirely quoted, including platform fees, per active card charges and monthly minimums that do not appear on the website, so the true cost per card is only visible late in a sales process.
  • Interchange sharing is the real revenue model for most customers, and the split is negotiated, capped for regulated debit under the Durbin amendment and sensitive to your spend mix, so revenue projections built on headline interchange rates overstate income.
  • Running issuing and acquiring with one provider concentrates risk: an outage or a compliance action affects both money in and money out at the same time.
  • Highnote is a younger company than the established issuer processors, so long term programme continuity, network certifications in new geographies and international coverage are thinner than the incumbent alternatives.

Zeplo

  • Zeplo sits directly in the execution path of your background work, so an outage at a very small vendor means your jobs do not run at all, and there is no published SLA below Enterprise.
  • The free Developer tier includes only 500 requests a month and one team member, so it is a demonstration allowance rather than a usable free plan for anything real.
  • Overage on the Developer tier is 20 US dollars per 100,000 requests, two hundred times the marginal rate on the Company tier, so exceeding the free allowance without upgrading is expensive.
  • Team members cost 15 US dollars each beyond the plan allowance, which is an odd charge on an infrastructure product billed by request volume.
  • Log retention is 30 days on both published tiers, so anything requiring longer audit trails on job execution has to be logged separately.

Pricing, plan by plan

Highnote

On request
  • Highnote platform$undefined/year
    • Quoted per programme with no public rate card
    • Requires a sponsor bank relationship for card issuing
    • Interchange sharing terms negotiated per programme

Zeplo

Free
  • DeveloperFree
    • 500 requests a month included
    • $20 per additional 100,000 requests
    • 1 team member
  • Company$39/month
    • 1,000,000 requests a month included
    • $10 per additional million requests
    • Up to 3 team members
  • Enterprise$undefined/month
    • Volume discounts
    • Custom team size
    • Support with SLA

Which should you pick?

Choose Highnote if

  • You need card issuing.
  • You work on Web, API.
  • You also want merchant acquiring.
Highnote review

Choose Zeplo if

  • You need url prefix interface.
  • You want to start without paying.
  • You work on Web, Cloud.
  • You also want retries with backoff.
Zeplo review

Questions people ask

Is Highnote or Zeplo better?
Neither clearly leads. Highnote starts at On request and Zeplo at Free, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Highnote or Zeplo?
Zeplo has a free tier; the other does not. Paid plans start at On request for Highnote and Free for Zeplo.
Does Highnote or Zeplo run on more platforms?
Highnote runs on Web, API. Zeplo runs on Web, Cloud.
Can I use Zeplo for free?
Yes. Zeplo has a free tier, so you can try it without paying. Highnote starts at On request.
What is Highnote best used for?
Highnote is most often used for a marketplace that both pays out to sellers and issues them spend cards, wanting one settlement ledger, a vertical software company embedding card acceptance and card issuing for the same customer base, a fintech launching a commercial charge card programme with custom authorisation logic, a platform replacing separate issuing and acquiring vendors to remove cross system reconciliation. Of those, a marketplace that both pays out to sellers and issues them spend cards, wanting one settlement ledger and a vertical software company embedding card acceptance and card issuing for the same customer base are not what Zeplo is typically brought in for.
What can Highnote do that Zeplo cannot?
Highnote covers Card issuing, Merchant acquiring, Unified ledger, Spend controls. Zeplo covers URL prefix interface, Retries with backoff, Delayed delivery, Cron scheduling.

Answered from the vendors’ own pages

Highnote: Do I need a sponsor bank?

Yes for card issuing in the United States. Highnote is a processor and programme platform, not a bank, and the sponsor bank sets approval and compliance terms.

Zeplo: How does Zeplo work?

You prefix your endpoint URL with zeplo.to and add query parameters for retries, delay, cron or concurrency. No SDK or broker is needed.

Highnote: How do customers make money on a card programme?

Mostly interchange sharing. Negotiate the split explicitly and model it against your actual spend mix, since regulated debit interchange is capped.

Zeplo: What does it cost?

Free for 500 requests a month; 39 US dollars a month for a million requests, then 10 dollars per additional million.

Highnote: Can Highnote handle both accepting and issuing payments?

Yes since its 2025 acquiring launch, on the same ledger, which is its main structural differentiator.

Zeplo: Is it suitable for critical jobs?

It is a small vendor in your execution path with no published SLA below Enterprise, so weigh that against the convenience.

Zeplo: Does it work with serverless platforms?

Yes, that is its main use, covering Vercel, Cloudflare Workers, Netlify and similar environments that lack long-running workers.

Share

Related pages

More on Highnote

More on Zeplo

Keep looking

Other head to heads