
StackSource
AI-native commercial mortgage brokerage. One submission, lender matching, and human support through closing. No upfront fees.

Apprentus
Prepare for the TU Delft Aerospace Engineering entrance test with timed practice exams on the same assessment platform used for the TU Delft entrance exam, live online lectures and private tutoring.
Which is more popular?
Website, pricing, platforms and company facts side by side.
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| Website | yieldstack.ai | delftprep.nl |
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| Company | Startup from the United States · 1 - 9 employees · 2025 | 2021 |
| Listed in |
In their own words, as submitted to SaaSHub.


YieldStack helps real estate investors, developers, and brokers find commercial mortgage financing from third-party lenders. Borrowers submit a financing request through one platform. AI supports deal preparation and lender-program matching, while YieldStack’s brokerage team helps compare offers,...
Maximize your chances of success in the TU Delft aerospace bachelor section test with our comprehensive preparation courses. Each year, only the top 440 out of 2000 candidates secure their place in this prestigious program. Our targeted training is meticulously designed to give you the edge.
What each product offers, as listed by its team.


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An editorial look at what each product does well and who it suits.


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As answered by people managing YieldStack and DelftPrep.
YieldStack's answer
YieldStack combines AI-assisted lender matching with hands-on commercial mortgage brokerage. Borrowers submit once, compare financing options, and work with a team that handles structuring, negotiation, and closing coordination. Borrowers approve lender outreach, with no upfront fees and a broker fee paid only at closing.
DelftPrep's answer:
DelftPrep stands out due to its use of the official exam software, providing a highly accurate and realistic preparation experience for the TU Delft aerospace bachelor section test. This unique feature allows students to practice with the same system they will encounter on the actual entrance exam, ensuring there are no surprises on test day and that they are well-acquainted with the exam's interface and functionality.
YieldStack's answer
YieldStack helps borrowers evaluate the whole financing offer: rate, leverage, fees, reserves, prepayment terms, and closing requirements. Its platform organizes the process, while its brokerage team helps borrowers find suitable lenders and move the deal forward. One submission gives borrowers a coordinated financing process without an upfront brokerage fee.
DelftPrep's answer:
Individuals should choose DelftPrep because of its unparalleled exam preparation fidelity, thanks to the use of official exam software. Additionally, DelftPrep boasts a dedicated team specialized in developing questions that reflect the exam's standards and a group of private tutors committed to personalized student guidance. This two-pronged approach ensures that DelftPrep's content is not only up-to-date and challenging but also that there is ample support for students to understand and master the material.
YieldStack's answer
Commercial real estate investors, developers, operators, and mortgage brokers seeking bridge, DSCR, fix-and-flip, construction, multifamily, and permanent financing across the United States.
DelftPrep's answer:
The primary audience for DelftPrep is prospective aerospace engineering bachelor students aiming to gain admission to TU Delft. These are individuals who are determined, forward-thinking, and seeking a rigorous academic program. They are often in their final year of high school and are looking for structured and efficient preparation methods to balance their current academic responsibilities with the demands of the entrance examination.
YieldStack's answer
Rommin Adl and Daniel Chesney founded YieldStack to simplify commercial real estate financing. The platform brings deal preparation, lender matching, offer comparison, and closing coordination into one workflow, combining AI-assisted analysis with human brokerage expertise.
DelftPrep's answer:
DelftPrep was conceived by a TU Delft Aerospace Engineering alumnus who successfully navigated the rigorous selection process and identified a gap in the preparation resources available to aspirants. This gap inspired the creation of DelftPrep, which is built upon the principles of quality, convenience, and stress-free learning. With insights from both the bachelor's and master's programs, the DelftPrep team crafts preparation materials that not only equip students with what they need to pass the test but also nurture a deeper understanding and appreciation for the field of aerospace engineering.
YieldStack's answer
AI integrations supporting the platform’s workflows.
DelftPrep's answer:
DelftPrep utilizes state-of-the-art online assessment platforms, like Mobius, to create an authentic testing environment. This technology is pivotal in replicating the actual exam conditions and providing a seamless, interactive learning experience that enables students to practice efficiently and effectively.
YieldStack's answer
The largest CRE Lenders in the USA
DelftPrep's answer:
DelftPrep serves a B2C market, primarily targeting individual customers—students who are eager to embark on their journey in aerospace engineering at TU Delft. While DelftPrep may not have large institutional clients, every single user is considered significant, with the service tailored to meet the specific needs and aspirations of these ambitious future engineers.
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