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APIs · head to head

Stoplight vs Unit

Stoplight logo

Stoplight

APIs

API design, documentation, and governance platform

From
Free
Rated
-
Full reviewWebsite
Unit logo

Unit

APIs

Banking as a service platform for embedding deposit accounts, cards and payments, with a sponsor bank behind it

From
On request
Rated
-
Full reviewWebsite

The short version

  • Only Stoplight has a free tier, so it costs nothing to try first.
  • Each has a real cost: Stoplight the free plan allows one project and one user; Unit your product depends on a sponsor bank you do not contract with directly, and 2024 showed what that means: Thread Bank received an FDIC enforcement action naming its banking as a service programmes and Blue Ridge Bank went under an OCC consent order and offboarded fintech partners.
  • They diverge on capability: Stoplight covers API Design, Unit covers Deposit accounts.
  • Prices and features above were last checked on 31 August 2026.

Where they differ

Only the attributes on which Stoplight and Unit actually diverge.

Attributes where Stoplight and Unit differ
AttributeStoplightUnit
Starting priceFreeOn request
Pricing modelsubscriptionquote
Free tierYesNo
PlatformsWeb, CloudWeb, iOS, Android
Founded2014Unknown

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 Stoplight

  • API Design
  • API Documentation
  • Governance
  • GitHub
  • GitLab
  • Jenkins
  • Azure DevOps
  • Web support

Only in Unit

  • Deposit accounts
  • Card issuing
  • Payments
  • White label components
  • Compliance operations
  • Lending
  • Programme reporting
  • Sandbox

What people use each for

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

Stoplight

  • API design and documentationnot Unit
  • API governance and standardsnot Unit
  • Team collaboration on API developmentnot Unit
  • API mocking and testingnot Unit

Unit

  • A vertical SaaS platform for contractors that wants to hold customer funds and issue expense cards without pursuing a charternot Stoplight
  • A payroll or benefits platform embedding accounts so employees can be paid ahead of schedulenot Stoplight
  • A marketplace that wants seller balances to sit in real accounts under its own brand rather than as ledger entries at a processornot Stoplight
  • A company that needs interchange revenue from a card programme to make the unit economics of its core product worknot Stoplight

Where each one falls short

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

Stoplight

  • The free plan allows one project and one user
  • Private projects, multi branch support and custom domains start at the Startup plan, $113 a month billed annually
  • SSO and shared style guides are Pro Team only, at $362 a month billed annually
  • Seats beyond each plan's allowance are $11 to $27 each per month depending on tier and billing period

Unit

  • Your product depends on a sponsor bank you do not contract with directly, and 2024 showed what that means: Thread Bank received an FDIC enforcement action naming its banking as a service programmes and Blue Ridge Bank went under an OCC consent order and offboarded fintech partners.
  • Programme approval by the bank is a separate gate from signing with Unit, and it can add months and impose product restrictions that were not visible during the commercial conversation.
  • Compliance obligations are shared but the operational load lands on you, and platforms consistently underestimate the staffing needed for disputes, escalations and the bank ongoing oversight requests.
  • Pricing is unpublished and blends platform fees, per-account and per-transaction charges and interchange sharing, which makes it hard to model unit economics before you have volume and easy to be surprised by the minimum.
  • Migrating a live deposit programme to a different provider or bank is extremely disruptive because it involves moving customer accounts and card credentials, so switching costs are far higher than for ordinary software.

Pricing, plan by plan

Stoplight

Free
  • FreeFree
    • 1 project
    • 1 user
    • Basic API design and documentation features
  • Basic$56/month
    • Annual: $44/user/year
    • 3 included users; $14 per additional user (monthly)
    • Unlimited projects
  • Startup$147/month
    • Annual: $113/user/year
    • 8 included users; $14 per additional user (monthly)
    • Private projects
  • Pro Team$453/month
    • Annual: $362/user/year
    • 15 included users; $27 per additional user (monthly)
    • Up to 20 teams

Unit

On request
  • Unit Banking as a Service$undefined/year
    • Platform fee plus per-account and per-transaction charges, quoted
    • Interchange sharing arrangements negotiated per programme
    • Minimum commitment typical

Which should you pick?

Choose Stoplight if

  • You need api design.
  • You want to start without paying.
  • You work on Web, Cloud.
  • You also want api documentation.
Stoplight review

Choose Unit if

  • You need deposit accounts.
  • You work on Web, iOS, Android.
  • You also want card issuing.
Unit review

Questions people ask

Is Stoplight or Unit better?
Neither clearly leads. Stoplight starts at Free and Unit at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
Which is cheaper, Stoplight or Unit?
Stoplight has a free tier; the other does not. Paid plans start at Free for Stoplight and On request for Unit.
Does Stoplight or Unit run on more platforms?
Stoplight runs on Web, Cloud. Unit runs on Web, iOS, Android.
Can I use Stoplight for free?
Yes. Stoplight has a free tier, so you can try it without paying. Unit starts at On request.
What is Stoplight best used for?
Stoplight is most often used for api design and documentation, api governance and standards, team collaboration on api development, api mocking and testing. Of those, api design and documentation and api governance and standards are not what Unit is typically brought in for.
What can Stoplight do that Unit cannot?
Stoplight covers API Design, API Documentation, Governance, GitHub. Unit covers Deposit accounts, Card issuing, Payments, White label components.

Answered from the vendors’ own pages

Stoplight: How much does Stoplight cost?

Stoplight starts with a free plan (1 project, 1 user), then Basic at $56/month per user (or $44/year), Startup at $147/month per user (or $113/year), Pro Team at $453/month per user (or $362/year), and Enterprise at custom pricing.

Source
Unit: Who actually holds the money?

A chartered partner bank, not Unit. Deposits sit at the sponsor bank and FDIC insurance flows from that bank, so its condition is your condition.

Stoplight: How many included users are in each Stoplight plan?

Basic includes 3 users, Startup includes 8 users, and Pro Team includes 15 users. Additional users beyond the included count cost $14/month for Basic and Startup, or $27/month for Pro Team.

Source
Unit: What happened with Unit sponsor banks in 2024?

Thread Bank received an FDIC enforcement action that explicitly named its banking as a service and lending as a service programmes, and Blue Ridge Bank was under an OCC consent order from January 2024 and offboarded fintech partners. Blue Ridge exited the order in late 2025.

Stoplight: Does Stoplight offer a free trial?

Yes, all paid Stoplight plans include a 14-day free trial. The free plan has no trial period as it is always available.

Source
Unit: What does Unit cost?

Not published. Expect a platform fee, per-account and per-transaction charges, an interchange share and a minimum commitment.

Stoplight: Does Stoplight's free plan have limitations?

Yes, the free plan includes only 1 project and 1 user. Users viewing public documentation anonymously are not counted toward the 1-user limit.

Source
Unit: Do we need our own compliance team?

Yes. Unit supplies tooling and the bank sets the rules, but disputes, escalations and evidence for bank oversight require named people on your side.

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