If your accounting, payroll, or proptech platform needs to connect to a customer’s bank account, you’ll eventually reach the same decision point: which open banking provider best fits how your product works? The market has split into a few distinct lanes, with some providers built for pan-European data coverage, some for infrastructure at massive scale, and others focused closely on UK business platforms. Picking the wrong provider can cost months of integration work you won’t get back.
Here’s a practical look at eight platforms worth knowing before you sign a contract, starting with one built specifically for the mid-market gap that most enterprise-focused providers overlook.
Best for UK-Focused AIS and PIS Under One Licence – Finexer
Finexer is an open banking platform for businesses that provides a single point of access to thousands of banks and bank accounts via a single API. Rather than forcing a platform to choose between a data provider and a separate payments provider, it combines account information and payment initiation into a single integration.
That matters most for accounting, payroll, proptech, and B2B SaaS platforms, since running both data and payments through a single contract and support relationship is meaningfully faster than stitching two vendors together. Finexer maintains its own direct AIS and PIS integrations with each bank rather than reselling access through a third party, and it’s FCA-authorised for both AIS and PIS under a single licence (FRN 925695).
Coverage runs deep across UK high street banks, challenger banks, and business accounts, with transaction history reaching up to 7 years, depending on the bank. Platforms that need real-time bank data on balances and transactions, along with the ability to accept payments online at low fees, can get both without maintaining two separate relationships.
Onboarding is a hands-on process managed by Finexer’s own team, lasting three to five weeks from start to finish. Sandbox access is typically agreed on the first call, while the consent flow carries the platform’s own branding rather than a visibly third-party redirect, with re-authorisation and revocation built in. For a UK-focused platform that wants one relationship instead of several, that combination is the standout reason to look here first.
Best for Open Banking Infrastructure at Scale – Yapily
Yapily positions itself as an Open Banking API Infrastructure Platform, with pricing structured around packages that scale with growth, including a free tier to get started alongside tailored pricing for larger businesses. That transparent, tiered pricing model is a clear point in its favour for a platform still testing what it needs.
The trade-off is that Yapily is built as infrastructure first. It’s a strong fit for a technical team that wants to build its own layer on top of an API, but it asks more of that team up front than a provider that offers a guided, hands-on onboarding process.
Best for Pan-European Bank Data Through One API – Tink
Tink is a European open banking platform connecting to over 6,000 European banks and institutions, delivering enriched and categorised financial data through a single API. That number is a real differentiator for any product that needs coverage across multiple European markets rather than just the UK.
The catch is that breadth of coverage doesn’t automatically mean depth of transaction history or UK-specific features. A platform whose customers are entirely UK-based may find that a UK-focused provider maps more closely to its account and transaction history needs than a pan-European network built for broader geographic reach.
Best for Global Payments Infrastructure – Mastercard
Mastercard describes its role as a global technology company in the payments industry, connecting and powering a digital economy that aims to make transactions safe, simple and accessible for people, businesses and governments. It’s a name most readers already trust by reputation alone, which counts for something when a platform’s own customers are asking who sits behind a payment flow.
Given the scale at which Mastercard operates, it isn’t built around the kind of narrow, fast-onboarding integration that a growth-stage SaaS platform typically needs. It suits a very different kind of buyer from the accounting or payroll platforms this list is primarily written for.
Best for Worldwide Open Finance Coverage – Salt Edge
Salt Edge calls itself a Global Open Banking and Open Finance Platform, with connections to more than 5,000 banks worldwide, covering data aggregation, open banking payments, and compliance on a single platform. That worldwide reach is the headline strength here, making it useful for any product with ambitions well beyond a single region.
The flip side of covering more than 5,000 banks globally is that no single market gets the same depth of specialisation that a regionally focused provider can offer. A platform building only for UK business accounts may not need that breadth at all.
Best for Flexible Fintech Building Blocks – Plaid
Plaid frames its purpose around enabling all companies to build fintech solutions, making it easy, safe and reliable for people to connect their financial data to apps and services. It’s a broad, developer-facing proposition aimed at any company building a financial product, rather than a narrow vertical.
That breadth is also the limitation. Building for “all companies” means less specialisation in any one workflow, so a platform in a specific vertical such as payroll or property management may need to do more customisation work to fit Plaid’s general-purpose approach to its own use case.
Best for Converting Bank Data Into Financial Insight – MX Technologies
MX Technologies positions itself as a leading financial data platform, aiming to convert data into deposits, loans and lifetime value by helping financial institutions build stronger relationships through the right message at the right moment. That framing points squarely at banks and lenders using data to grow relationships, rather than at software platforms needing a payments rail.
That focus on financial institutions rather than software vendors is worth flagging. A B2B SaaS platform looking for a straightforward payments integration is a different buyer from the one MX is built around.
Best for API and AI Connectivity at Enterprise Scale – Kong
Kong calls itself the AI Connectivity Company, describing its role as securing, governing and scaling API, AI, MCP and agent gateways. It’s a connectivity and infrastructure business rather than an open banking specialist, which puts it in a different category from the rest of this list.
Because Kong’s focus sits at the infrastructure and gateway layer, it’s a better match for engineering teams solving broad connectivity problems than for a finance platform looking specifically for bank data or payment initiation out of the box.
Which One Is Right for You
If your platform serves UK accounting, payroll, proptech or B2B SaaS customers and needs both account data and payment initiation without juggling two vendors, Finexer is the standout choice. Combining AIS and PIS under a single FCA licence, backed by direct one-to-one bank integrations and a hands-on onboarding process measured in weeks rather than months, is exactly the kind of setup that matters when go-live speed and a stable connection to UK banks are the priority. That shift towards connected financial services is part of the wider rise of fintech and digital banking, where APIs increasingly sit behind everyday financial processes.
The same move towards connected, automated workflows is showing up in more specialised areas too. Mortgage platforms, for example, are bringing more stages of the process online, as seen in this step-by-step guide to end-to-end mortgage automation. For any business choosing an open banking provider, the bigger question is therefore less about finding the provider with the longest feature list and more about whether its infrastructure fits the workflows you actually need to support.
