APIs · head to head
Griffin vs Treasury Prime
Griffin
APIs
UK banking-as-a-service from a company that holds its own full banking licence
- From
- £100/month
- Rated
- -
Treasury Prime
APIs
Banking as a service platform sold to sponsor banks rather than to fintechs
- From
- On request
- Rated
- -
The short version
- Each has a real cost: Griffin platform banking carries a one-off onboarding fee from 15,000 pounds and a 3,500 pound monthly minimum, which prices out early-stage companies entirely.; Treasury Prime a fintech cannot buy Treasury Prime directly since the 2024 pivot, so the sales process starts with finding a sponsor bank willing to take your programme, which adds months and removes most of your negotiating leverage on fees.
- They diverge on capability: Griffin covers Bank accounts by API, Treasury Prime covers BankOS.
- Prices and features above were last checked on 1 September 2026.
Where they differ
Only the attributes on which Griffin and Treasury Prime actually diverge.
| Attribute | Griffin | Treasury Prime |
|---|---|---|
| Starting price | £100/month | On request |
| Pricing model | Per month with usage drawdown | quote |
| Platforms | Web, REST API | API, Web |
Identical on both: free tier (No), 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 Griffin
- Bank accounts by API
- UK payment rails
- Integrated ledger
- Automated onboarding
- Debit cards
- Interest on balances
Only in Treasury Prime
- BankOS
- OneKey Banking
- Deposit accounts
- Payments
- Card issuing
- Bank oversight tooling
- Ledger and reconciliation
- Programme onboarding
What people use each for
The jobs each tool is most often brought in to do.
Griffin
- A wealth platform that must hold client money in a licensed bank rather than an EMI safeguarding accountnot Treasury Prime
- A lender wanting UK accounts and payment rails without becoming a bank itselfnot Treasury Prime
- A fintech burned by sponsor bank instability that wants the deposit holder and the API provider to be the same entitynot Treasury Prime
- A platform needing sub-account ledgering for pooled client funds with a clean audit trailnot Treasury Prime
Treasury Prime
- A community or regional bank that wants to run an embedded finance line with examiner-acceptable oversight of its fintech programmesnot Griffin
- A fintech that has already chosen its sponsor bank and needs API access to that bank rather than to a middleware layernot Griffin
- A company that wants deposits spread across several banks for FDIC coverage beyond a single institution limitnot Griffin
- A bank replacing a fragile middleware arrangement with a structure where it holds the customer contract and the oversight obligationnot Griffin
Where each one falls short
Documented limitations, not opinions. Every one is a constraint you would hit in normal use.
Griffin
- Platform banking carries a one-off onboarding fee from 15,000 pounds and a 3,500 pound monthly minimum, which prices out early-stage companies entirely.
- It is UK-only, so a business with European or US operations needs a second banking provider and a second integration for those entities.
- It is a young bank with a small balance sheet relative to incumbents, and enterprise counterparties still ask hard questions about concentration risk.
- Holding a banking licence means Griffin applies bank-grade due diligence to its own clients, so onboarding is slower and more selective than an EMI-based provider.
- Feature breadth is narrower than long-established providers, particularly in card programme management and in payment types beyond core UK rails.
Treasury Prime
- A fintech cannot buy Treasury Prime directly since the 2024 pivot, so the sales process starts with finding a sponsor bank willing to take your programme, which adds months and removes most of your negotiating leverage on fees.
- Commercial terms including minimum deposit balances, reserve requirements and per transaction pricing are set by the bank rather than the platform, so two fintechs on the same software can face materially different economics with no public benchmark.
- The company cut roughly half its staff in the 2024 pivot, which reduced the teams that supported fintech customers directly and left fintechs relying on their bank for support rather than on the vendor who wrote the software.
- Bank risk appetite is now the binding constraint, and after the Synapse failure sponsor banks decline programmes in higher risk categories that a middleware provider would once have onboarded, so some business models simply cannot get placed.
- If your sponsor bank exits the programme or is told by its regulator to reduce fintech exposure, you are migrating your entire deposit base to another institution, and the software being the same at both ends does not make that a small project.
Pricing, plan by plan
Griffin
£100/month- Business Banking$100/month
- From 100 pounds per month
- Interest or commission from around 1.75 percent AER variable
- Operational accounts and UK payment rails
- Platform Banking$3500/month
- One-off onboarding fee from 15,000 pounds
- Minimum monthly spend of 3,500 pounds, drawn down by usage
- Higher committed tiers at 5,000 and 10,000 pounds with discounts
- Enterprise$undefined/month
- Custom pricing
- Bespoke account structures and volumes
- Negotiated interest or commission share
Treasury Prime
On request- BankOS$undefined/year
- Sold to sponsor banks, not directly to fintechs
- Fintech commercial terms are set by the sponsor bank
- Minimum deposits, reserves and per transaction fees vary by bank
Which should you pick?
Choose Griffin if
- You need bank accounts by api.
- You work on Web, REST API.
- You also want uk payment rails.
Choose Treasury Prime if
- You need bankos.
- You work on API, Web.
- You also want onekey banking.
Questions people ask
- Is Griffin or Treasury Prime better?
- Neither clearly leads. Griffin starts at £100/month and Treasury Prime at On request, and user ratings are close enough to be indistinguishable. Choose on capability and platform support.
- Which is cheaper, Griffin or Treasury Prime?
- Griffin starts at £100/month and Treasury Prime at On request.
- Does Griffin or Treasury Prime run on more platforms?
- Griffin runs on Web, REST API. Treasury Prime runs on API, Web.
- What is Griffin best used for?
- Griffin is most often used for a wealth platform that must hold client money in a licensed bank rather than an emi safeguarding account, a lender wanting uk accounts and payment rails without becoming a bank itself, a fintech burned by sponsor bank instability that wants the deposit holder and the api provider to be the same entity, a platform needing sub-account ledgering for pooled client funds with a clean audit trail. Of those, a wealth platform that must hold client money in a licensed bank rather than an emi safeguarding account and a lender wanting uk accounts and payment rails without becoming a bank itself are not what Treasury Prime is typically brought in for.
- What can Griffin do that Treasury Prime cannot?
- Griffin covers Bank accounts by API, UK payment rails, Integrated ledger, Automated onboarding. Treasury Prime covers BankOS, OneKey Banking, Deposit accounts, Payments.
Answered from the vendors’ own pages
Griffin: Is Griffin actually a bank?
Yes. It received a UK banking licence with restrictions in March 2023 and a full licence in March 2024 after exiting mobilisation.
Treasury Prime: Can a fintech buy Treasury Prime directly?
No. Since the 2024 pivot it sells to banks. A fintech contracts with a sponsor bank running BankOS, and the bank sets the terms.
Griffin: What does it cost?
Business banking from 100 pounds a month; platform banking from a 15,000 pound onboarding fee plus a 3,500 pound monthly minimum drawn down by usage.
Treasury Prime: Why did it change model?
Regulatory pressure on the tri-party middleware structure, sharpened by the Synapse failure. Examiners want the bank holding the customer contract and the oversight obligation, which is what bank-direct means.
Griffin: Does it cover Europe?
No. Griffin is a UK bank serving UK accounts and UK payment rails.
Treasury Prime: What is OneKey Banking?
A way of spreading deposits across several banks in the network, used for FDIC coverage above a single institution limit and for resilience if one bank exits.
Treasury Prime: Is pricing published?
No, at neither the bank nor the fintech level. Fintech economics are set by the sponsor bank, so expect wide variation.
Related pages
More on Treasury Prime
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