The best open source option available to build internal tools at a 10x faster speed.
I was able to connect my existing datasources and backend; Infact it got so easy at a point that My non technical co-founder was able to use the platform and get stuff done quickly and easily. Also, great support team :)
build some internal apps for myself and clients, also for fast building application over database, as far my experience was incredible, with their generous free plan , we can build custom app without burden to pay server