PayTrust or PayPal provide payment systems + enough documentation to use for taxes + reporting.

Also, they both just work... all the time...

I say use plaid. They work well with banks and seem to be a standard for this type of thing.

Considering the number of financial APIs present in the market today, it is especially important to recognize what we are exactly looking for. The important factors to consider while choosing an API include functionalities, services, and pricing. Developers around the world integrate these API’s to their financial applications to make their work easy and efficient by extracting high-quality data. Developers look for certain functionalities while choosing an API. These API’s also target some selected markets based on the functionalities they provide. Three of the most talked financial API companies present in the market today are compared in this article. They include Bay area start-ups gaining momentum based on the demand these financial applications generate nowadays. Plaid offers two API products for the current market. Plaid AUTH and Plaid CONNECT are the current Plaid offerings. Xignite, founded in 2006 is another fast-growing company that provides financial market data and financial web services. Yodlee is the most matured company out of the three. Yodlee was established in 1999 and powers financial applications for 99% banks in the US.

Yodlee enjoys direct access to banking data, whereas other APIs rely on extracting data from banking websites. Yodlee also offers two APIs for the finance market. Xignite has captured the hot and trending cloud technology sector that can help them grow in the coming years. Plaid is still in private beta phase and email requesting access needs to be sent to gain access. Yodlee is the leading API provider for financial institutions but it needs to innovate and adapt to ongoing changes in the digital finance industry to avoid stagnation.
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Both Yodlee and Plaid are solid choices for financial applications, each with its own strengths depending on your use case. Plaid is generally praised for its developer-friendly API, ease of integration, and broad bank coverage, which makes it a popular choice for fintech startups focusing on account aggregation and personal finance. Yodlee, on the other hand, is known for its deep data insights, and it's often favored for more established financial services needing a robust, data-rich platform.

The decision between the two often comes down to your specific requirements. Plaid might be better for quick, streamlined integrations, while Yodlee could offer more in-depth data analytics for larger-scale applications.

For a deeper dive into building financial apps and choosing the right technologies, check out this blog: https://www.cleveroad.com/blog/how-to-create-a-financial-app/.

Hope this helps clarify your decision!