SlimPay

SlimPay helps businesses automate recurring payment collection through account-to-account payments, direct debits, and open banking services. It supports subscription and invoice payments, as well as direct-debit payment method updates. Customers can sign SEPA mandates digitally using a checkbox or one-time password. Supported schemes include SEPA Direct Debit CORE and B2B, along with SEPA Credit Transfer. SlimPay says it handles euro direct debits and credit transfers and accepts payments from countries within the SEPA jurisdictional scope. Merchants can connect through a REST API or use File Transfer for batch processing. Checkout can be added to websites and mobile applications as a pop-in, redirection, or iFrame. Accounts are accessible through a Dashboard, REST API, and file transfer interface; failed SEPA direct debits can be retried manually or automatically. Pricing is on request, and there is no free plan listed. SlimPay was founded in 2010 and is headquartered in Paris. It says production accounts are created after validated pre-production tests and completion of customer KYC.

SlimPay offers payment collection and management through APIs, file transfer, and embedded checkout options. Businesses should confirm pricing and account requirements directly with SlimPay before planning production use.

SlimPay suits businesses collecting recurring payments in the SEPA jurisdictional scope through direct debit or account-to-account payment methods. It is not an ERP, CRM, or subscription relationship-management platform.

SlimPay is a payment-collection service for businesses that bill customers repeatedly from bank accounts. It is best suited to organizations operating in the euro-area SEPA network that can complete technical validation and KYC before going live. Its focused mandate, debit and transfer tooling is a strong fit for account-to-account collections, but it is not a subscription-management or CRM system.

Overview

Founded in 2010 and headquartered in Paris, SlimPay automates recurring collections through direct debit, account-to-account payments and open-banking services. It covers subscription billing, invoice collection and updates to customers’ direct-debit payment methods. Production access follows a defined gate: SlimPay creates a production account after pre-production tests are completed and validated and the customer finishes KYC. That makes it more appropriate for established payment projects than for an informal trial.

The service is centered on SEPA and euros. Businesses collecting outside the SEPA jurisdiction or needing a broader multi-currency acquiring platform should look elsewhere. SlimPay also explicitly sits below the application layer: it does not replace an ERP, CRM or subscription relationship-management product.

Key features

Mandates and payment schemes

Customers can sign SEPA mandates digitally with either a checkbox or a one-time password. That gives merchants a practical authorization step inside a digital payment journey rather than forcing a separate paper process. SlimPay supports SEPA Direct Debit CORE, SEPA Direct Debit B2B and SEPA Credit Transfer, covering both consumer and business debit use cases alongside transfers.

Direct debits and credit transfers are handled in euros for countries within the SEPA jurisdictional scope. This is a clear strength for euro-denominated recurring revenue, but a firm boundary for companies whose collection strategy depends on non-SEPA markets or currencies.

Integration and checkout

A REST API supports custom integrations, while the File Transfer interface handles batch processing. Checkout can be placed in websites and mobile applications through pop-in, redirection or iFrame formats. Those options let a team choose between a more embedded experience and a lower-complexity redirect, while file transfer gives operations teams a route for scheduled bulk work.

Payment accounts are accessible through a Dashboard, REST API and file-transfer interface. Failed SEPA direct-debit transactions can be retried manually or automatically, so businesses can match recovery work to their own collection rules rather than being limited to one workflow.

Security and support

SlimPay says it is authorized and supervised by France’s ACPR as a payment institution and operates under GDPR requirements. Its servers are located entirely in the European Union on Amazon Web Services. Developers can contact a dedicated team through the developer center for documentation and error questions. These assurances and support channels matter to teams with European data-residency and implementation requirements, although they do not turn SlimPay into a broader billing application.

Pricing

SlimPay has no free plan. Its Production service plan uses custom pricing, with fees set by contacting SlimPay. The plan includes both payment frequencies, both scheme coverage options, mandate management, API access and a hosted payment page. That bundle suits a business ready to operate recurring SEPA collections in production and needing both integration and hosted-checkout routes.

There is no lower-cost self-serve tier to evaluate the service without a commercial conversation, and no published seat, transaction quota, trial period or renewal term. Buyers should obtain those commercial and account requirements before budgeting or scheduling launch. The pre-production validation and KYC steps also mean the production price is only one part of the onboarding commitment.

Platforms

SlimPay is offered on Android, iOS and the web, with API access for application and backend integration. The mobile and web coverage supports customer checkout across devices, while the API and file-transfer interfaces serve custom and batch operations.

Who it's for

SlimPay is a good match for subscription businesses, invoice-led organizations and other merchants collecting recurring euro payments by SEPA direct debit or transfer. It is particularly compelling when digital mandate signing, embedded checkout, retry controls and a choice of API or batch integration are requirements.

It is a weaker fit for a company seeking built-in customer relationship management, subscription lifecycle management or a general international payment stack. Teams that cannot complete pre-production checks and KYC, or that need coverage beyond the SEPA jurisdiction, should not make SlimPay their default choice.

Pros and cons

Pros

• Strong SEPA coverage: CORE, B2B and Credit Transfer schemes support several recurring and invoice-collection models in euros.
• Flexible implementation: REST API, file transfer, Dashboard and three checkout modes cover custom, batch and hosted workflows.
• Digital mandate authorization: Checkbox and one-time-password signing keep SEPA consent inside an online journey.
• Recovery controls: Manual and automatic retries give businesses a choice in responding to failed direct debits.
• European operating posture: ACPR supervision, GDPR requirements and EU-hosted AWS servers address important compliance and residency concerns.

Cons

• Custom pricing only: Without a free plan or published rates, smaller teams cannot assess cost through self-service.
• SEPA and euro focus: The geographic and currency scope does not suit collections outside the SEPA jurisdiction.
• Not a business-management suite: ERP, CRM and subscription-relationship functions remain the customer’s responsibility.
• Production gate: Validated pre-production testing and completed KYC are required before a production account is created.

Alternatives

For a wider comparison of direct-debit tools, see Direct Debit Processing Software; for broader payment platforms, see Payment Processing Software.

Paystack is the better pick for a Nigeria-focused option with a free plan and published local transaction pricing, while still offering Android, iOS, web and API access.

Razorpay e-Mandate is an alternative for teams wanting a paid mandate service across Android, iOS, web and API platforms.

Powens suits buyers who want a free trial and custom API plans, with enterprise options for dedicated hosting and support.

BRIAPI AutoDebit is an API-only alternative from BRI for integrating third-party applications with BRI services.

ClearDebit is a paid API and web alternative.

Debit Success is a paid API and web alternative.

GoCardless Bank Account Data is a paid API and web alternative.

Bottomline Internal Threat Management is a paid web product for enterprise fraud and insider-risk management.

Verdict

Choose SlimPay if your business needs recurring euro collections in the SEPA network, digital mandates and flexible API, batch or embedded-checkout integration. Its scheme coverage, retry controls and European compliance posture are the main reasons to shortlist it. Look elsewhere if you need transparent self-serve pricing, non-SEPA currencies or an application that also manages subscriptions, customers and back-office operations.