Building your own bank card program or lending product from scratch means dealing with a bank partner, a card network, compliance and fraud systems that take most teams a year or more to get right. 'Banking-as-a-service' platforms exist to skip that: you plug into their API and your product can issue cards, move money, or extend credit as if you'd built a bank yourself. Highnote and Unit are two of the platforms fintechs and SaaS companies reach for — Highnote even lists Unit as a direct alternative — but they're built for different-sized bets.
The core difference in one line
Highnote is a newer, focused platform built to get a card program — issuing, payment acquiring, and credit like BNPL — live in weeks, with a modern GraphQL API. Unit is a broader, proven-at-scale banking platform (accounts, payments, cards, lending) that already processes over $100 billion a year, but is US-only and comes with a heavier enterprise sales process.
Side by side
| Highnote | Unit | |
|---|---|---|
| Best for | Launching a card program (issuing + credit) fast | Full banking stack at proven large scale |
| API style | Modern GraphQL, sandbox + real-time webhooks | REST, Ready-to-Launch (managed) or Custom (full API) |
| Product scope | Card issuing, payment acquiring, credit/BNPL | Accounts, payments, cards, lending |
| Proven scale | Not publicly disclosed | $100B+ annual volume, 15M+ daily API calls, 2M+ end users |
| Geography | Worldwide | United States only |
| Pricing | Quote-based, usage/enterprise model | Quote-based, no public pricing page |
Highnote: a modern, focused card-program platform
Highnote's pitch is speed and scope in one product: card issuing, payment acquisition, and credit — including buy-now-pay-later and revolving credit — on a single GraphQL API, with a Snowflake integration for reporting built in. That combination (issuing plus credit, not just one or the other) is unusual, and the GraphQL-first design with real-time webhooks tends to feel more modern to a developer than older REST-based competitors. The honest trade-offs: there's no public pricing anywhere, everything runs through a sales conversation, and its marketing site leans heavily on documentation with fairly little product detail available without talking to sales — so it's not a great fit if you want to self-serve your way to a decision.
Unit: proven scale, broader product, US-only
Unit's strongest argument is simply scale: over $100 billion in annual transaction volume, more than 15 million API calls a day, and over 2 million end users already served — numbers Highnote doesn't publish an equivalent for. It also covers more ground (accounts, payments, cards and lending in one platform) and offers a real choice of deployment: a managed 'Ready-to-Launch' option to get moving fast, or a fully custom API if you need control. The honest trade-offs: like Highnote, there's no public pricing page (it actually 404s), everything requires an enterprise sales engagement, and Unit is US-market only — a dealbreaker if you need to serve customers elsewhere.
Which should you pick?
Pick Highnote if your core need is a card program — especially one that combines issuing with credit or BNPL — and you want a modern GraphQL API without being limited to the US market.
Pick Unit if you need more than cards (real deposit accounts and lending too), you're US-only, and proven massive-scale reliability matters more to you than picking the newest API design.
Both require an actual sales conversation before you'll see a number, so budget time for that regardless of which way you lean — this isn't a self-serve, credit-card-signup kind of decision. You can see full profiles and alternatives for Highnote and Unit on mySelectas.