15% is not a terrible rate. If you look at companies like OnDeck[0] they start at 11% and don't lend to SaaS companies. There are also companies that already do this like "saas-capital"[1] which start at 12%. SVB won't lend until you're > $1M ARR. This just slightly above the market rate for a lower MRR SaaS company.
SaaS Capital: Won't touch you unless you have $3m in ARR. Yes they can get down to 12% but they also take warrants. We'll start at $250k in ARR, and take no warrants.
SVB: Banks will only lend to software companies if they have VC backing. (yes they lend at cheaper rates)
OnDeck and Kabbage/others are at 25%+ interest rates. Read the terms.
working on this now, good catch. site is getting slightly overwhelmed.
in terms of SVB, banks are a great option if you've raised VC. they can usually give you debt at 5-6% interest rates and 0.1-.5% warrant coverage but will only do a deal with you if you are "sponsored"
0 - https://www.ondeck.com/resources/top-10-faqs 1 - https://www.saas-capital.com/our-approach